2026 K. L. Ngai: Materials Science Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Materials Science	85	2153	2078	17	15	518	26879
Chemistry	86	2525	2279	39	35	502	27223

K. L. Ngai publication distribution in Materials Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Materials Science in 2026. The highlighted bar marks where K. L. Ngai sits on this spectrum.

50 publications 1,163+

This scientist: 518 publications — 88th percentile

88% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,163 publications or more.

K. L. Ngai D-index placement in Materials Science in 2026

The chart shows the D-index (discipline H-index) distribution of Materials Science scientists ranked by Research.com in 2026. The highlighted bar marks where K. L. Ngai sits on this spectrum.

40 D-Index 165+

This scientist: 85 D-Index — 84th percentile

84% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 165 D-Index or more.

Research.com Recognitions

2025 - Research.com Chemistry in Italy Leader Award
2022 - Research.com Chemistry in Italy Leader Award

Overview

K. L. Ngai is a researcher affiliated with the University of Pisa in Italy, specializing in Materials Science. The scientist's work spans multiple subfields including Materials Chemistry, Fluid Flow and Transfer Processes, Ceramics and Composites, Polymers and Plastics, and Physical and Theoretical Chemistry.

The core of K. L. Ngai's research focuses on the dynamics and properties of materials, with key topics including:

Material Dynamics and Properties
Glass Properties and Applications
Thermodynamic Properties of Mixtures
Ionic Liquids Properties and Applications
Polymer Nanocomposites and Properties
Photochemistry and Electron Transfer Studies
Metallic Glasses and Amorphous Alloys

K. L. Ngai has contributed to a number of scientific papers, among which the following are notable by their recent publication dates and venues:

"Universal properties of relaxation and diffusion in complex materials: Originating from fundamental physics with rich applications" (2023) in Progress in Materials Science
"Clarifying the nature of the Johari-Goldstein β-relaxation and emphasising its fundamental importance" (2020) in The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics
"Relating the dynamics of hydrated poly(vinyl pyrrolidone) to the dynamics of highly asymmetric mixtures and polymer blends" (2021) in Journal of Molecular Liquids

Frequently publishing in respected journals, K. L. Ngai has been featured multiple times in venues such as Macromolecules, Physical Review E, Journal of Molecular Liquids, Physical Chemistry Chemical Physics, and Physical Review B. These publications reflect the scientist's interdisciplinary approach bridging chemistry and materials science.

Collaboration has been a significant aspect of this scientist's research output. Frequent co-authors include:

Marian Paluch
S. Capaccioli
Shidong Feng
Li-Min Wang
Xiaoqian Lu

This collaborative network underlines a multi-institutional and cross-disciplinary engagement in advanced materials research.

Best Publications

Physical Properties of Polymers

James Mark;Kia Ngai;William Graessley;Leo Mandelkern

967
Citations
Classification of secondary relaxation in glass-formers based on dynamic properties.

K. L. Ngai;M. Paluch

906
Citations
Correlation of polymer segmental chain dynamics with temperature-dependent time-scale shifts

Donald J. Plazek;Kia L. Ngai

654
Citations
Dynamic and thermodynamic properties of glass-forming substances

K.L. Ngai

581
Citations
Identification of Different Modes of Molecular Motion in Polymers That Cause Thermorheological Complexity

K. L. Ngai;D. J. Plazek

450
Citations
Chemical structure and intermolecular cooperativity: dielectric relaxation results

K. L. Ngai;C. M. Roland

404
Citations
Three Coupled Relations for Relaxations in Complex Systemsa

K. L. Ngai;R. W. Rendell;A. K. Rajagopal;S. Teitler

351
Citations
Relation between the activation energy of the Johari-Goldstein β relaxation and T g of glass formers

K. L. Ngai;S. Capaccioli

331
Citations
Surface polaritons in a circularly cylindrical interface: Surface plasmons

C. A. Pfeiffer;E. N. Economou;K. L. Ngai

312
Citations
Similarity of relaxation in supercooled liquids and interacting arrays of oscillators.

K. L. Ngai;Kwok Yeung Tsang;Kwok Yeung Tsang

303
Citations
Nature and properties of the Johari–Goldstein β-relaxation in the equilibrium liquid state of a class of glass-formers

K. L. Ngai;P. Lunkenheimer;C. León;U. Schneider

286
Citations
Slowing down of relaxation in a complex system by constraint dynamics

K. L. Ngai;A. K. Rajagopal;S. Teitler

277
Citations
Frequency dependence of dielectric loss in condensed matter

K. L. Ngai;C. T. White

263
Citations
Origin of constant loss in ionic conductors.

León C;Rivera A;Várez A;Sanz J

252
Citations
Comments on the electric modulus function

I.M. Hodge;K.L. Ngai;C.T. Moynihan

246
Citations
Observation of the Component Dynamics in a Miscible Polymer Blend by Dielectric and Mechanical Spectroscopies

A. Alegria;J. Colmenero;K. L. Ngai;C. M. Roland

239
Citations
Do theories of the glass transition, in which the structural relaxation time does not define the dispersion of the structural relaxation, need revision?

K L Ngai;R Casalini;S Capaccioli;M Paluch

239
Citations
Viscoelastic properties of polymers. 4. Thermorheological complexity of the softening dispersion in polyisobutylene

D. J. Plazek;I.-C. Chay;K. L. Ngai;C. M. Roland

233
Citations
Correlation between the activation enthalpy and Kohlrausch exponent for ionic conductivity in oxide glasses.

Kia L. Ngai;Steve W. Martin

231
Citations
Anomalous isotope-mass effect in lithium borate glasses: Comparison with a unified relaxation model

K. L. Ngai;R. W. Rendell;H. Jain

229
Citations
Dynamical heterogeneity in a miscible polymer blend

C. M. Roland;K. L. Ngai

224
Citations