Skip to McMaster Navigation Skip to Site Navigation Skip to main content
McMaster Logo McMaster logo

Dr. Gyan Johari

Professor (Emeritus)
Department of Materials Science and Engineering

BSB B107
+1 905.525.9140 x 24941


Calorimetric, dielectric, mechanical and ultrasonic behaviour of glasses, and other amorphous solids, polymers, shape-memory metals, interstitial-free steel; cryo-preservation and protein-water interactions. Techniques for studying materials. Microwave and high frequency dielectric materials. Materials Science of Pharmaceuticals.

Current Research Projects:

  • Dielectric properties of ceramics, glasses, and polymers from sub-audio to microwave frequencies.
  • The processing of thermoset polymers, and the effects of physical ageing on their characteristics.
  • Materials Science of Pharmaceuticals.
  • C and N determination in “interstitials free” steel by internal friction and the effects of strain ageing.
  • Deformation of shape-memory alloys.
  • Protein-water interactions and cryo-preservation.
  • Mechanical relaxation and damping in materials.
  • Effect of elastic strain energy on phase transformations.



G.P. Johari & Ove Andersson, Effects of pressure-temperature protocols on the properties of crystals and ageing effects – an analogy with glasses Philosophical Magazine, (2021), 10.1080/14786435.2021.1990431.(22 pages).

G.P. Johari, Entropy, enthalpy and volume of perfect crystals at limiting high pressure and the third law of thermodynamics, Thermochimica Acta 698, 178891(2021), (5 pages).

G.P. Johari, Variation of entropy and volume of liquids with pressure and their Kauzmann- and Simon-type extrapolations toward zero entropy, Thermochimica Acta, 700,178936 (2021).

G.P. Johari, Decrease in heat capacity and enthalpy of an aging glass–A conflict with standard procedure for determining enthalpy loss and fictive temperature, Thermochimica Acta, (2020).

E. Tombari and G. P. Johari, Endothermic Effects on Heating Physically Aged Sucrose Glasses and the Clausius Theorem Violation in Glass Thermodynamics, Journal of Physical Chemistry B, 124, 2017-2028 (2020).

G. P. Johari, “Source of JG-Relaxation in the Entropy of Glass”, Journal of Physical Chemistry, B. 123, 3010-3023 (2019).

G. P. Johari, “Effects of Microstructure and Sample’s Surface to Volume Ratio on Pressure-Induced Nucleation and Transformation to Crystalline and Apparently Amorphous Solids”, Journal of Physical Chemistry, B. 123, 9992- 9999 (2019).

P. Lunkenheimer, F. Humann, D. Reuter, K. Geirhos, A. Loidl, and G. P. Johari, “Johari-Goldstein relaxation in glass electrets”, Physical Review Materials, Rapid Communication 3, 112601(R), (2019), 5 pages.

G. P. Johari, “Electric field for increasing the solubility of glass – a much sought after pharmaceutical advantage” Journal of Non-Crystalline Solids489, 27-32 (2018).

G. P. Johari, “Increasing the Ambient Pressure Solubility by Forming a Glass at High Pressure and Its Thermodynamics, a Much Sought-After Pharmaceutical Advantage” Journal of Physical Chemistry B122, 2031−2039 (2018).

D. P. B. Aji and G. P. Johari, “Decrease in electrical resistivity on depletion of islands of mobility during aging of a bulk metal glass” Journal of Chemical Physics148, 144506 (2018). 9 pages.

G. P. Johari, O. Andersson, and B. Sundqvist, “Instability and thermal conductivity of pressure-densified and elastically altered orientational glass of Buckminsterfullerene” Journal of Chemical Physics148, 144502 (2018). 9 pages.

G. P. Johari, “On relative merits of the criteria of glass formation and effects of ultraviscous liquid properties” Journal of Non-Crystalline Solids471, 439-445 (2017).

M. C. Righetti, E. Tombari, and G. P. Johari, “Endothermic features on heating of glasses show that the second glass to liquid transition of water was phenomenologically-mistaken.” Thermochimica Acta647, 101-110   (2017).

G. P. Johari and O. Andersson, “Structural relaxation and thermal conductivity of high-pressure formed, high-density di-n-butyl phthalate glass and pressure induced departures from equilibrium state”, Journal of Chemical Physics146, 234505 (2017). 11 pages.

G. P. Johari “Effects of electric field on thermodynamics and ordering of a dipolar liquid” Journal of Chemical Physics145, 164502 (2016). 7 pages.

O. Andersson and G. P. Johari, “Thermal conductivity of Glycerol’s liquid, glass, and crystal states, glass-liquid-glass transition, and crystallization at high pressures” Journal of Chemical Physics144, 064504 (2016). 10 pages.

O. Andersson and G. P. Johari, “Sub-Tg features of glasses formed by cooling glycerol under pressure – Additional incompatibility of vibrational with configurational states in the depressurized, high density glass” Journal of Chemical Physics145, 204506 (2016). 8 pages.

M. C. Righetti, E. Tombari, and G. P. Johari “Aging kinetics of levoglucosan orientational glass as a rate dispersion process and consequences for the heterogeneous dynamics view”, Journal of Chemical Physics. 145, 054501 (2016). 13 pages

G. P. Johari “Comment on “Water’s second glass transition, K. Amann-Winkel, C. Gainaru, P. H. Handle, M. Seidl, H. Nelson, R. Böhmer, and T. Loerting, Proc. Natl. Acad. Sci. (U.S.) 110 (2013) 17720.”, and the sub-Tg features of pressure-densified glasses.”  Thermochimica Acta617, 208-218 (2015).

G. P. Johari and O. Andersson, “Effects of stacking disorder on thermal conductivity of cubic ice .” Journal of Chemical Physics143, 054505 (2015). 11 pages.

E. Tombari and G. P. Johari, “Structural fluctuations and orientational glass of levoglucosan -High stability against ordering and absence of structural glass.” Journal of Chemical Physics142, 104501 (2015). 10 pages

M. C. Righetti and G. P. Johari, “Enthalpy and entropy changes during physical ageing of 20% polystyrene–80% poly(-methylstyrene) blend and the cooling rate effects.” Thermochimica Acta607, 19-29 (2015).

D. P. B. Aji and G. P. Johari, “Effect of incongruent crystallization on glass–liquid transition features of a bulk metal glass.”  Thermochimica Acta615, 72-80 (2015).

D. P. B. Aj and G. P. Johari, “Kinetic-freezing and unfreezing of local-region fluctuations in a glass structure observed by heat capacity hysteresis.” Journal of Chemical Physics, 142, 214510 (2015). 9 pages.

G. P. Johari and J. Teixeira, “Thermodynamic Analysis of the Two-Liquid Model for Anomalies of Water, HDL−LDL Fluctuations, and Liquid−Liquid Transition.” Journal of Physical Chemistry B119, 14210-14220 (2015).

J. Yu, O. Andersson, and G. P. Johari  “Effects of nm-size discs on thermal conductivity and specific heat of water and ice and the gelation time.” Colloid and Polymer Science293, 901-911 (2014).

G. P. Johari “Comment on: “Relaxation time of high-density amorphous ice, by P. H. Handle, M. Seidl, T. Loerting; Phys. Rev. Lett. 108 (2012) 225901”. The  -relaxation time of strained state of high-density amorphous ice at T < Tg, its Tg, and its transformations.”  Thermochimica Acta, 589, 76–84 (2014).

G. P. Johari, “Calorimetric features of release of plastic deformation induced internal stresses, and approach to equilibrium state on annealing of crystals and glasses.” Thermochimica Acta, 581, 14–25 (2014).

D. P. B. Aji and G. P. Johari, “Effects of configurational changes on electrical resistivity during glass-liquid transition of two bulk metal-alloy glasses.” Journal of Chemical Physics141, 224508 (2014). 8 pages.

D. P. B. Aji, J. Khouri,  and G. P. Johari, “Non-exponential relaxation, fictive temperatures, and dispersive kinetics in the liquid glass-liquid transition range of acetaminophen, sulfathiazole, and their mixtures” Journal of Chemical Physics, 141, 174507 (2014). 9 pages.

G. P. Johari and R. M. Shanker, “On the solubility advantage of a pharmaceutical’s glassy state over the crystal state, and of its crystal polymorphs”, Thermochimica Acta598, 16–27 (2014).

E. Tombari and G. P. Johari, “Change in entropy in thermal hysteresis of liquid-glass-liquid transition and consequences of violating the Clausius theorem.”  Journal of Chemical Physics 141, 074502 (2014). 6 pages.

G. P. Johari, “Molecular architecture dependent hydrogen-bonded motifs, entropy change, and dielectric permittivity of alcohols.” Journal of Chemical Physics139, 026101 (2013), 2 pages.

E. Tombari and G. P. Johari, “On the state of water in 2.4 nm cylindrical pores of MCM from dynamic and normal specific heat studies”, Journal of Chemical Physics139, 064507 (2013), 9 pages.

E. Tombari and G. P. Johari, “Specific heat of hydrated lysozyme, water’s contribution to its dynamics, and criteria for glass formation of biomaterials.” Journal of Chemical Physics, 139, 105102 (2013), 9 pages.

J. Khouri and G. P. Johari, “Effects of adding a viscosity-increasing 2 nm-size molecule on dielectric relaxation features and the dynamic heterogeneity view.” Journal of Chemical Physics136, 196101 (2013) 2 pages.

G. P. Johari, “Effects of electric field on the entropy, viscosity, relaxation time, and glass formation”, Journal of Chemical Physics, 138, 154503 (2013). 7 pages.

G. P. Johari and J. Khouri, “Non-exponential nature of calorimetric and other relaxations: Effects of 2 nm-size solutes, loss of translational diffusion, isomer specificity, and sample size”, Journal of Chemical Physics138, 12A511 (2013). 18 pages.

G. P. Johari, “Electrode-spacer and other effects on the validity of the Kramers–Kronig relations and the fittings to the permittivity and electrical modulus spectra”, Thermochimica Acta, 547, 47– 52 (2012).

G. P. Johari and J. Khouri, “Effects of 2 nm size added heterogeneity on non-exponential dielectric response, and the dynamic heterogeneity view of molecular liquids”. Journal of Chemical Physics137, 104502 (2012). 10 pages.

J. Khouri and G. P. Johari, “Effects of a chemically reacting, 2 nm size heterogeneity on polymerization: A dielectric relaxation study.” Thermochimica Acta, 540, 74 – 84 (2012).

G. P. Johari, “Comment on ‘Dynamics of glass-forming liquids. XIII. Microwave heating in slow motion”, J. Chem. Phys. [J. Chem. Phys. 130, 194509 (2009)]. Journal of Chemical Physics, 137, 027101 (2012). 2 pages

D. P. B. Aji and G. P. Johari, “Fictive temperatures of pharmaceutical glasses -A comparison of two methods for determining the enthalpy and entropy integrals” Thermochimica Acta536, 41-46 (2012).

E. Tombari, G. Salvetti, and G. P. Johari, “Specific heat and transformations of water in 1.4 nm and 1.8 nm pore-MCMs”.  Journal of Physical Chemistry C, 116, 2702-2709 ( 2012).

J. Khouri and G. P. Johari, “Kinetics of Polymerization of a liquid with nano-size structural heterogeneities”. Journal of Physical Chemistry C, 115, 13489 -13501 (2011).

G. P. Johari, “Mechanical relaxation and the notion of time-dependent extent of ergodicity during the glass transition”. Physical Review, E  84, 021501 (2011). (7 pages).

G. P. Johari, “Specific heat relaxation-based critique of isothermal glass transition, zero residual entropy and time-average formalism for ergodicity loss”. Thermochimica Acta, 523, 97-104 (2011).

G. P. Johari, ” Comment on: Heat capacity, enthalpy fluctuations, and configurational entropy in broken ergodic systems:  J. Chem. Phys. 133, 164503 (2010), by J. C. Mauro, R. J. Loucks, and S. Sen”. Journal of Chemical Physics, 134, 147101 (2011). (2 pages).

G. P. Johari and D. P. B. Aji, “Response to the Comment on ‘Time dependent paths, fictive temperatures and residual entropy of glass’’. Philosophical Magazine91, 3861-3864 (2011).

G. Power, M. Nagarajan, J. K. Vij, and G. P. Johari, “Debye process and dielectric state of an alcohol in a non-polar solvent”. Journal of Chemical Physics134, 044525 (2011). (9 pages).

G. P. Johari, D. P. B. Aji, and L. Gunawan,  “Clausius limits on cooling and heating through the liquid-glass range of three pharmaceuticals and one metal alloy – annealing effects and residual entropy”. Thermochimica Acta522, 173-181 (2011).

O. Andersson and G. P. Johari, “Effect of pressure on thermal conductivity and pressure collapse of ice in a polymer-hydrogel and kinetic unfreezing at 1 GPa ”. Journal of Chemical Physics134, 124903 (2011). 10 pages.

G. P. Johari and J. Khouri, “Entropy change on the cooling and heating paths between liquid and glass and the residual entropy”. Journal of Chemical Physics134, 034515 (2011). (6 pages).

G. P.  Johari and D. P. B. Aji, “Time-dependent paths, fictive temperatures and residual entropy of glass”, Philosophical Magazine, 90, 4377-4392  (2010).

G. P. Johari and R. M. Shanker, “On determining the relaxation time of glass, and amorphous pharmaceuticals’ stability from thermodynamic data”. Thermochimica Acta, 511, 89-95 (2010).

D. P. B. Aji and G. P. Johari, “Isothermal and non-isothermal crystallization kinetics of ultraviscous melt of Mg65Cu25Tb10 glass”. Thermochimica Acta510, 144-153 (2010)

G. P.  Johari and D. P. B. Aji, “Kinetic unfreezing of a binary alloy and configurational entropy”.Journal of Chemical Physics, 133, 056101 (2010). 2 pages.

D. P. B. Aji and G. P. Johari, “Fictive temperature, structural relaxation, and reality of residual entropy”. Journal of Physical Chemistry B 114, 9578-9585 (2010).

D. P. B. Aji and G. P. Johari,  “Enthalpy and entropy changes on structural relaxation of Mg 65Cu25Tb10 glass”. Thermochimica Acta, 503-504, 121-131 (2010).

G. P. Johari, “Configurational and residual entropies of nonergodic crystals and the entropy’s behavior on glass formation”. Journal of Chemical Physics, 132, 124509 (2010). 7 pages.

G. P. Johari, “On resolving the statistical and calorimetric entropies of glass and non-crystalline solids, and the residual entropy problem”. Thermochimica Acta500, 111-118 (2010).

G. P. Johari, S. Kim, and R. M. Shanker, “Dielectric study of equimolar acetaminophen-quinidine, and benzoic acid-progesterone molecular alloys in the glass and ultraviscous states and their relevance to solubility and stability”. Journal of Pharmaceutical Sciences99, 1358-1374 (2010).

O. Andersson and G. P. Johari  “Pressure collapse of ice clathrate and hexagonal ice mixtures formed by freezing,” Journal of Chemical Physics131, 114503 (2009). 10 pages.

G. P. Johari, E. Tombari, G. Salvetti, and F. Mallamace ,” Does water need a (lambda) -transition” Journal of Chemical Physics130, 126102 (2009). 2 pages.

G. P. Johari,  “Origin of the enthalpy fetaures of water 1.8 nanometer pores of MCM-41 and large Cp increase at 210 K.” Journal of Chemical Physics, 130, 124518 (2009). 6 pages

E. Tombari, C. Ferrrari, G. Salvetti, and G. P. Johari “Dynamic and apparent specific heats during transformation of water in partly filled nanopores during slow cooling to 110 K and heating” (Special Issue on Calorimetry on a Nano-Scale) Thermochimica Acta, 492, 37- 44 (2009).

G. P. Johari  “Thermal relaxation of water due to interfacial processes and phase equilibria in 1.8 nanometer size pores of MCM-41.” (Special Issue on Calorimetry on a Nano-Scale).
Thermochimica Acta, 492, 29-36 (2009).

E. Tombari, C, Ferrari, G. Salvetti, and G. P. Johari “Specific heat relaxation of an alcohol and implications for dielectric comparison.” Journal of Chemical Physics, 130, 124505 (2009). (6 pages).

E. Tombari, S. Presto, R. M. Shanker, and G. P. Johari,“Crystallization kinetics of ultraviscous acetaminophen by heat capacity and enthalpy measurements and diffusion control.”
Journal of Physical Chemistry  B,  113, 15293- 15303 (2009).

E. Tombari, C. Ferrari, G. Salvetti, and G. P. Johari  “Reply to ‘Comment on ‘Vibrational and configurational parts of the specific heat at glass formation’ ”. Physical Review B. 78, 176302 (2008). 2 pages.

L. Gunawan and G. P. Johari, “Specific heat, melting, crystallization and oxidation of zinc nanoparticles, and their TEM studies”. Journal of Physical Chemistry C112, 20159-20166 (2008).

O. Andersson and G. P. Johari,  “Nature of the pressure-induced collapse of an ice clathrate by dielectric spectroscopy.” Journal of Chemical Physics129, 234505 (2008) 10 pages

Andersson and G. P. Johari,  “Collapse of an ice clathrate under pressure and thermal conductivity”. Physical Review B78, 174201(2008). 9 pages.

C. Ferrari, E. Tombari, G. Salvetti, and G. P. Johari, “Vibrational and configurational specific heats at glass formation.” Physical Review B. 77, 024304 (2008). 8 pages.

G. P. Johari and D. P. B. Aji, “On the use of relaxation times of supercooled liquids and glasses.” Journal of Chemical Physics, 129, 056101 (2008). 2 pages.

E. Tombari, C. Ferrari, G. Salvetti, and G. P. Johari “Vibrational and configurational specific heats during isothermal structural relaxation of a glass to equilibrium liquid.” Physical Review B78, 144203 (2008). 8 pages.

E. Tombari, C. Ferrari, G. P. Johari, and R. M. Shanker, “Calorimetric relaxation in pharmaceutical glasses and its utility in understanding their stability against crystallization.” Journal of Physical Chemistry B112, 10806 – 10814 (2008).

E. Tombari, C. Ferrari, and G. P. Johari, “Configurational specific heat of molecular liquids by modulated calorimetry.” Journal of Chemical Physics129, 054501 (2008). 7 pages.

E. Tombari, S. Presto, R. M. Shanker, and G. P. Johari, “Molecular mobility and thermodynamics of Griseofulvin in the glass-forming range from dynamic heat capacity study.” Pharmaceutical Research25, 902-912 (2008).

G. P. Johari and R. Shanker, “Calorimetric relaxation and the glass-liquid temperature of acetaminophen-nifedipine alloys.” Journal of Pharmaceutical Science, 97, 3233-3244 (2008).

G. P. Johari, “Comment on: Glass transition in pure and doped amorphous solids water-An ultrafast calorimetry study.” Journal of Chemical Physics, 127, 157101 (2007). 2 pages.

C. Ferrari, E. Tombari, G. Salvetti, and G. P. Johari, “Relaxation during polymerization on slow heating and the vibrational heat capacity of polymers.” Journal of Chemical Physics, 127, 024903 (2007). 9 pages.

E. Tombari, C. Ziparo, G. Salvetti, and G. P. Johari, “Vibrational and configurational heat capacity of poly(vinyl acetate) from dynamic measurements.”  Journal of Chemical Physics, 127, 014905 (2007). 6 pages.

G. Power, J. K. Vij, and G. P. Johari, “Structure-dependent dc conductivity and relaxation time in the Debye-Stokes-Einstein equation.” Journal of Physical Chemistry, B, 111, 11201-11208 (2007).

G. P. Johari and O. Andersson, “In situ transformation of amorphous ices at high pressures.” Physical Review B, 76, 134103 (2007). (10 pages).

G. P. Johari and O. Andersson, “Amorphization of ice by collapse under pressure, vibrational properties and ultraviscous water at 1 GPa.” Proceedings of the NATO Advanced Research Workshop. “Soft Matter under Exogenic Implacts, Fundamentals and Emerging Technologies (Springer, Berlin, 2007), pages 35-74.

D. P. B. Aji, P. Wen, and G. P. Johari, “Memory effect in enthalpy relaxation of two metal-alloy glasses.” Journal of Non-Crystalline Solids353, 3796-3811 (2007).

G. P. Johari, “Determining vibrational and configurational heat capacity and thermal expansivity, and their change at glass-liquid transition.”  Journal of Chemical Physics126, 114901 (2007). 5 pages.

E. Tombari, C. Ferrari, G. Salvetti, and G. P. Johari, “Spontaneous liquifaction of isomerizable molecular crystals.” Journal of Chemical Physics126, 021107 (2007). 4 pages.

G. Power, J. K. Vij, and G. P. Johari, “Dielectric relaxation and crystallization of nanophase separated 1-propanol-isoamylbromide mixture.” Journal of Chemical Physics127, 094507 (2007). 9 pages.

C. Ferrari, E. Tombari, G. Salvetti, and G. P. Johari, “Composition dependence and the nature of endothermic freezing and exothermic melting.”  Journal of Chemical Physics126, 124506 (2007). 4 pages.

G. P. Johari and O. Andersson, “Vibrational and relaxational properties of crystalline and amorphous ices.” Thermochimica Acta461, 14 – 43 (2007).

E. Tombari, G. Salvetti, C. Ferrari, and G. P. Johari, “Kinetics and thermodynamics of sucrose hydrolysis from real time enthalpy and heat capacity measurements.”  Journal of Physical Chemistry, B, 111, 496-501 (2007).

G. P. Johari, S. Kim, and R. M. Shanker, “Dielectric relaxation and crystallization of ultraviscous melt and glassy states of aspirin, ibuprofen, progesterone and quinidine.” Journal of Pharmaceutical Science96, 1159-1175 (2007).

G. Power, J. K. Vij, and G. P. Johari, “Relaxation and nano-phase separation in ultraviscous heptanol-alkyl halide mixture.” Journal of Chemical Physics, 126, 034512 (2007). 9 pages.

P. Wen, G. P. Johari, R. J. Wang, and W. H. Wang, “Change in the vibrational properties of bulk metal glass with time.” Physical Review B, 73, 224203 (2006), 7 pages.

G. Power, J. K. Vij, and G. P. Johari, “Orientation polarization from faster motions in the ultraviscous and glassy diethyl phthalate and its entropy.” Journal of Chemical Physics124, 044513 (2006), 9 pages.

G. Power, J. K. Vij, and G. P. Johari, “Kinetics of spontaneous change in the localized motions of D-Sorbitol glass.” Journal of Chemical Physics124, 074509 (2006), 8 pages.

O. Andersson, G. P. Johari, and R. M. Shanker, “Effect of pressure on molecular and ionic motions in ultraviscous acetaminophen-aspirin mixture.”  Journal of Pharmaceutical Sciences95, 2406-2418 (2006).

E. Tombari, S. Presto, G. P. Johari, and R. M. Shanker, “Dynamic heat capacity and relaxation time of ultraviscous melt and glassy acetaminophen.” Journal of Pharmaceutical Sciences95, 1006-1021 (2006)

Tombari, S. Presto, G. Salvetti, and G. P. Johari, “Heat capacity of tetrahydrofuran clathrate and of its components and the clathrate formation from supercooled melt.”  Journal of Chemical Physics124, 150547 (2006), 10 pages.

L.Gunawan, G. P. Johari, and R. M. Shanker, “Structural relaxation of acetaminophen glass.” Pharmaceutical Research23, 967- 979 (2006).

K. Venkateshan and G. P. Johari, “Dielectric relaxation and elasticity during polymerization.” Journal of Chemical Physics125, 014907 (2006), 7 pages.

K. Venkateshan and G. P. Johari, “Thermal conductivity of a polymerizing liquid.”  Journal of Chemical Physics125, 054907 (2006), 12 pages.

G. P. Johari and O. Andersson, “On the non-linear variation of dc conductivity with dielectric relaxation time.”Journal of Chemical Physics, 125, 124501 (2006), 7 pages.

G. P. Johari and O. Andersson, “Vibrational features of water’s amorphs at high pressures.” Physical Review B. 73, 094202 (2006), 6 pages.

G. P. Johari, P. Wen, and K. Venkateshan, “Evolution of vibrational properties during a macromolecule’s growth.” Journal of Chemical Physics124, 154906 (2006), 5 pages.

S. Yannopoulous and G. P. Johari, “Poisson’s ratio and liquid’s fragility.” Nature442, E7-E8 (2006) (Brief Communication arising).

G. P. Johari, “On the Poisson’s ratio of glass and liquid vitrification characteristics.”  Philosophical Magazine86, 1567-1579 (2006).

K. Venkateshan and G. P. Johari, “Relaxation time and elasticity during polymerization with DER 332.” Journal of Chemical Physics125, 156101 (2006), 2 pages.

E. Tombari, G. Salvetti, C. Ferrari, and G. P. Johari, “Position-dependent energy of molecules in nanoconfined water” Physical Chemistry-Chemical Physics7, 3407-3411 (2005).

E. Tombari, C. Ferrari, G. Salvetti, and G. P. Johari, “Heat capacity of water in nanopores.” Journal of Chemical Physics123, 214706 (2005). 5 pages.

E. Tombari, C. Ferrari, and G. Salvetti, and G. P. Johari, “Endothermic freezing on heating and exothermic melting on cooling.” Journal of Chemical Physics123, 051104 (2005). 4 pages.

G. P. Johari, “State of water at 136 K determined by its relaxation time.” Physical-Chemistry-Chemical Physics Communications7, 1091-1095 (2005).

G. P. Johari, “Water’s size-dependent freezing to cubic ice.”  Journal of Chemical Physics122, 194504 (2005). 5 pages.

G. Salvetti, E. Tombari, C. Ferrari, and G. P. Johari, “Thermodynamic functions of water confined to 2 nanometer pore radius.” Journal of Chemical Physics122, 104712 (2005). 9 pages.

G. P. Johari, S. Kim, and R. Shanker, “Dielectric studies of molecular motions in amorphous solid and ultraviscous acetaminophen.”Journal of Pharmaceutical Sciences94, 2207-2223 (2005).

G. P. Johari, “Dielectric relaxation time of ultraviscous bulk water at 136 –140 K, Background loss and crystallization effects.” Journal of Chemical Physics122, 144508 (2005). 10 pages.

G. P. Johari, “On the notion of “background 1/f noise”, and analysis for glassy water.”  Journal of Chemical Physics123, 016102 (2005).

G. P. Johari, “A dielectric fallacy in inferring Tg of water.”  Journal of Chemical Physics122, 036101 (2005).

G. P. Johari, “Decrease in the configurational entropy during a melt’s polymerization.”  Chemical Physics305, 231-236 (2004).

G. P. Johari and O. Andersson, “Mechanism of pressure- and time-dependent amorphization of ice.” Physical Review B. 70, 184108 (2004 ).

E. Tombari, G. Salvetti C. Ferrari, and G. P. Johari, “Structural unfreezing and endothermic effects in liquid Beta-D-fructose” Journal of Physical Chemistry B, 108, 16877-16882 (2004).

O. Andersson and G. P. Johari, “Spontaneous transformation of water’s high-density amorph and two-stage crystallization to ice VI at 1 GPa, a dielectric study.” Journal of Chemical Physics120, 11662-11671 (2004).

G. P. Johari, “Test for thermodynamic state of water’s high-density amorph” Journal of Chemical Physics121, 8428-8431 (2004).

K. Vankateshan and G. P. Johari, “Dielectric polarization and stages of macromolecule’s growth.” Journal of Physical Chemistry B. 108, 15049-15056 (2004).

G. P. Johari, “Ionic, dipolar and interfacial processes”  Encyclopedia of Supramolecular Chemistry, (Dekker, 2004).

O. Andersson, G. P. Johari and H. Suga, “An ice phase of lowest thermal conductivity.” Journal of Chemical Physics120, 9612-9617 (2004).

O. Andersson and G. P. Johari, “Time-dependent amorphization of ice at 0.8- 0.9 GPa.” Journal of Chemical Physics,121, 3936-3938 (2004).

G. P. Johari and O. Andersson, “Water’s polyamorphic transitions and amorphization of ice under pressure.” Journal of Chemical Physics120, 6207-6213 (2004).

J. Wang and G. P. Johari, “Structural relaxation and configurational statistics of the orientational glass, CuCN.” Physical Review B, 68, 214201 (2003) 6 pages.

S. Nemilov and G. P. Johari, “A mechanism for spontaneous relaxation of glass at room  temperature.” Philosophical Magazine83, 3117-3132 (2003).

G. P. Johari, “Librational heat capacity of fullerenes in the Einstein model.” Journal of Chemical Physics119, 11912-11916 (2003).

W. T. Coffey, G. P. Johari, Yu P. Kalmykov, and S. V. Titov, “Complex susceptibility of the cage model of polar liquids.”  Journal of Physics, Condensed Matter15, 2961-2977 (2003).

G. P. Johari, “Calorimetric features of high enthalpy amorphous solids and glass-softening temperature of water”.  Journal of Physical Chemistry B. 107, 9063-9070 (2003).

G. Power, G. P. Johari, and J. K. Vij “Relaxation strength of localized motions in D-sorbitol and mimicry of glass-softening thermodynamics” Journal of Chemical Physics119, 435- 442 (2003).

G. P. Johari, “Low-energy excitations of guest molecules in clathrates and the Boson peak”.  Chemical Physics287, 273 – 283 (2003).

G. P. Johari, “Water’s Tg endotherm, sub-Tg peak of glasses and Tg of water”.  Journal of Chemical Physics119, 2935 – 2937 (2003).

G. P. Johari, “On the entropy equations for a liquid’s relaxation time at high pressures”.  Journal of Chemical Physics119, 635 – 637 (2003).

G. P. Johari, “Stability of ice XII relative to ice V and ice VI at high pressures.”  Journal of Chemical Physics118, 242 – 248 (2003).

G. P. Johari, “Simple ratio for testing a supercooled liquid’s relaxation time-entropy relation”. Journal of Physical Chemistry B, 102, 5048-5051 (2003).

T. V. Kolodyazhnyi, A. Petric, G. P. Johari and A. G. Belous, “Effect of preparation conditions on cation ordering and dielectric properties of Ba(Mg1/3Ta2/3)O3 ceramics.” Journal of the European Ceramics Society22, 2013 – 2021 (2002).

G. P. Johari, E. Tombari, S. Presto, and G. Salvetti, “Experimental evidence for the heat capacity maximum during a melt’s polymerization.” Journal of Chemical Physics117, 5086 – 5091 (2002).

G. P. Johari, “Amorphous solid water’s isotopic exchange kinetics.” Journal of Chemical Physics117, 2782 – 2789 (2002).

S. Presto, E. Tombari and G. Salvetti, and G. P. Johari, “The heat capacity relaxation and the enthalpy decrease in mass- and diffusion-controlled reaction kinetics.” Physical Chemistry-Chemical Physics4, 3415 – 3421 (2002).

G. Salvetti, E. Tombari, L. Mikheeva, and G. P. Johari, “The endothermic effects during denaturation of lysozyme by temperature modulated calorimetry and an intermediate reaction equilibrium.” Journal of Physical Chemistry B, 106, 6081 – 6087 (2002).

G. P. Johari, “Decrease in the configurational and vibrational entropies on supercooling a liquid and their relations with the excess entropy.” Journal of Non-Crystalline Solids307-310, 387 – 392 (2002).

G. P. Johari, “Localized motions of Beta-relaxation and its energy landscape.” Journal of Non-Crystalline Solids, 307-310, 317 – 325 (2002).

G. P. Johari, “Molecular Inertial effects in liquids: Poley absorption, collision induced absorption, low-frequency Raman spectrum and Boson peaks.” Journal of Non-Crystalline Solids307-310, 114 – 127 (2002)

J. Wang, M. F. Collins, and G. P. Johari, “CuCN: an orientational glass.” Physical Review B, Rapid Communication. 65, 18103-1 – 18103-4 (2002).

G.P. Johari, G. Power, and J.K. Vij, “Localized relaxation in a glass and the minimum in its orientational polarization.” Journal of Chemical Physics, 117, 1714-1722 (2002).

J. Wang and G. P. Johari, “The gradual transition from mass-controlled to diffusion-controlled kinetics during melt polymerization.” Journal of Chemical Physics, 117, 9897 – 9902 (2002).

Tombari, S. Presto, G.Salvetti, and G. P. Johari “Spontaneous decrease in the heat capacity of a glass.” Journal of Chemical Physics117, 8436 – 8441 (2002).

G. P. Johari, “Does water need a new Tg?” Journal of Chemical Physics116, 8067 – 8073 (2002).

G. P. Johari, G. Power, and J. K. Vij, “Localized relaxation’s strength and its mimicry of glass-softening thermodynamics.” Journal of Chemical Physics116, 5908 – 5909 (2002).

G. Power, J. K. Vij, and G. P. Johari, “Effects of ions on the dielectric permittivity and relaxation rate and the decoupling of ionic diffusion from dielectric relaxation in supercooled liquid and glassy propanol.” Journal of Chemical Physics116, 4192 – 4201 (2002).

J. Wang and G. P. Johari, ” Chain statistics and the changes in the entropy and heat capacity during melt polymerization.” Journal of Chemical Physics116, 2310 – 2322 (2002).

G. P. Johari, “The entropy loss on supercooling a liquid and anharmonic contributions.” Journal of Chemical Physics116, 2043 – 2046 (2002).

G. P. Johari, “Use of crystal polymorphs for resolving an equilibrium liquid’s state on supercooling to 0 K.” Journal of Chemical Physics116, 1744 – 1747 (2002).

G. P. Johari, “The Tammann phase boundary, exothermic disordering and the entropy contribution change on phase transformation.” Physical Chemistry Chemical Physics3, 2483 – 2487 (2001).

G. P. Johari, “Heat capacity and entropy of an equilibrium supercooled liquid from Tg to 0 K, and examining the conjecture of an underlying thermodynamic transition.” Chemical Physics265, 217 – 231 (2001).

G. P. Johari, “On extrapolating a supercooled liquid’s excess entropy, the vibrational component, and reinterpreting the configurational entropy theory.” Journal of Physical Chemistry B, 105, 3600 – 3604 (2001).

G. P. Johari, “Examining the entropy theory’s application to viscosity data and the inference for a thermodynamic transition in an equilibrium liquid.” Journal of Non-Crystalline Solids288, 148 – 158 (2001).

T. Kolodiazhnyi, A. Petric, and G. P. Johari, “Models of the current-voltage dependence of BaTiO3 with positive temperature coefficient of resistivity. Journal of Applied Physics89, 3939 – 3946 (2001).

G. P. Johari, O. E. Kalinovskaya, and J. K. Vij, “Effects of induced steric hindrance on the dielectric behavior and H-bonding in the supercooled liquid and vitreous alcohol.” Journal of Chemical Physics114, 4634 – 4642 (2001).

E. Kalinovskaya, J. K. Vij, and G. P. Johari, “Mechanism of the major orientation polarization in alcohols, and the effects of steric hindrance-, and dilution-induced decrease on H-bonding.” Journal of Physical Chemistry A, 105, 5061 – 5070 (2001).

J. Wang and G. P. Johari, “Effects of sinusoidal temperature and pressure modulations on the structural relaxation of amorphous solids.” Journal of Non-Crystalline Solids281, 91-107 (2001).

G. P. Johari and E. Whalley, “The dielectric relaxation time of ice V, its partial antiferroelectric ordering and the role of Bjerrum defects.” Journal of Chemical Physics115, 3274- 3280 (2001).

C. Cardelli, E. Tombari, and G. P. Johari, “The combined effects of temperature and polymerization rate changes on the real-time conduction and relaxation of a liquid, and the evolution of localized motions.” Journal of Physical Chemistry B, 105, 11035-11043 (2001).

G. P. Johari, “The configurational entropy theory and the heat capacity decrease of orientationally disordered crystals on cooling to 0 K.” Philosophical Magazine B, 81, 1935 – 1950 (2001).

E. Tombari, C. Cardelli, G. Salvetti, and G. P. Johari, “Dielectric relaxation and the conformer equilibrium in the liquid and glassy states of b-D-Fructose.” Journal of Molecular Structure559, 245 – 254 (2001).

G. P. Johari, “Thermodynamic effects of phase transformation in heterogeneous solids and pressure amorphization of emulsified ice.” Philosophical Magazine B., 80, 323 – 330 (2000).

G. P. Johari, “Contributions to the entropy of a glass and liquid, and the dielectric relaxation time.” Journal of Chemical Physics112, 7518 – 7523 (2000).

G. P. Johari, “An estimate of the Gibbs energy of amorphous solid waters and the differences between the low-density amorph and glassy water.” Journal of Chemical Physics112, 8573 – 8580 (2000).

G. P. Johari, “A resolution of the enigma of a liquid’s configurational entropy-molecular kinetics relation.” Journal of Chemical Physics¸ 112, 8958 – 8969 (2000).

G. P. Johari, “Configurational and vibrational entropies and molecular relaxation in supercooled water.” Journal of Chemical Physics112, 10957 – 10965 (2000).

G. P. Johari, “On the origin of the heat capacity feature of the annealed ices and ice clathrates, and interpreting water’s diffusivity in term of the entropy.” Chemical Physics258, 277 – 290 (2000).

G. P. Johari, “An equilibrium supercooled liquid’s entropy and enthalpy in the Kauzmann and the third law extrapolations, and a proposed experimental resolution.” Journal of Chemical Physics113, 751 – 761 (2000).

G. P. Johari, “On the amorphization of hexagonal ice, the nature of water’s low-density amorph, and the continuity of molecular kinetics in supercooled water. Text of an invited Lecture.” Physical Chemistry -Chemical Physics, 2, 1567 – 1577 (2000).

G. P. Johari and D. Pyke, ” On the glassy and supercooled liquid states of a common medicament: Aspirin.” Physical Chemistry-Chemical Physics2, 5479 – 5484 (2000).

G. P. Johari, M. F. Collins, and R. Feyerherm, “Anharmocnicity-induced glass-like transition in plastic crystal without alpha-relaxation.” Physical Review B, 61, 5827-5830 (2000).

G. P. Johari, M. Beiner, C. Macdonald, and J. Wang, “The glass-softening temperature range and non-Arrhenius dynamics: the case of vitrified water.” Journal of Non-Crystalline Solids278, 58 – 68 (2000).

G. P. Johari, “Supercooled water’s thermodynamic behaviour and a conflict between Arrhenius relaxation and configurational Entropy.” Journal of Molecular Structure528, 249 – 257 (2000).

C. Macdonald and G. P. Johari, “Glass-softening of trehalose and calorimetric transformations in its liquid state.” Journal of Molecular Structure523, 119 – 132 (2000).
G. P. Johari and J. G. Shim, “Enthalpy recovery on thermal cycling within the non-equilibrium state of a glass.” Journal of Non-Crystalline Solids261, 52 – 66 (2000).

E. Tombari, G. Salvetti, and G. P. Johari, “The temperature and polymerization effects on the relaxation time and conductivity, and the evolution of the localized motions.” Journal of Chemical Physics113, 6957 – 6965 (2000).

D.A. Wasylyshyn, J.G. McAnanama, and G. P. Johari, “Temperature-independent onset of diffusion control during polymerization in a diepoxide-amine mixture by dielectric measurements. Chemical Physics252, 237 – 245 (2000).

G. P. Johari and D.A. Wasylyshyn, “DC conductivity, proton percolation and gelation during the network growth in a flexible, chain diepoxide and diamine mixture.” Journal of Polymer Science, Polymer Physics38, 122 – 126 (2000).



M.Sc., Ph.D., F.R.S. (Canada), D.Hons.Causa (Lyon), Sc.D. (h.c.Dublin)


Related Courses