Lok Lew Yan Voon

Lok Lew Yan Voon

University of West Georgia

H-index: 30

North America-United States

About Lok Lew Yan Voon

Lok Lew Yan Voon, With an exceptional h-index of 30 and a recent h-index of 20 (since 2020), a distinguished researcher at University of West Georgia, specializes in the field of silicene tight binding.

His recent articles reflect a diverse array of research interests and contributions to the field:

Charge Transfer Between Two-Dimensional Materials

Contact Electrification of Two-Dimensional Materials

On chain models for contact electrification

REFEREED JOURNALS

Generalized Weisskopf‐Wigner model of triboelectroluminescence

QUANTUM THEORY OF CONTACT ELECTRIFICATION

Quantum theory of contact electrification for fluids and solids

Microscopic model for contact electrification between solids and fluids

Lok Lew Yan Voon Information

University

University of West Georgia

Position

Physics

Citations(all)

5820

Citations(since 2020)

1675

Cited By

4988

hIndex(all)

30

hIndex(since 2020)

20

i10Index(all)

72

i10Index(since 2020)

23

Email

University Profile Page

University of West Georgia

Lok Lew Yan Voon Skills & Research Interests

silicene tight binding

Top articles of Lok Lew Yan Voon

Charge Transfer Between Two-Dimensional Materials

Authors

Lok Lew Yan Voon,Morten Willatzen,Zhong-Lin Wang

Journal

Bulletin of the American Physical Society

Published Date

2024/3/4

Contact electrification is a ubiquitous phenomenon involving charge transfer that is still poorly understood. It has been proposed as a clean energy source for the Internet of Things in triboelectric nanogenerators (TENGs). Recently, we proposed a microscopic model in one-dimension in order to study the dynamics of electrons between atomic chains [M. Willatzen, LC Lew Yan Voon, and Z.-L. Wang, Adv. Func. Mat. 1910461 (2020)]. In this talk, we compare the charge transfer between two-dimensional materials with different Bravais lattices in order to assess the relevance of using two-dimensional materials in the design of TENGs.

Contact Electrification of Two-Dimensional Materials

Authors

Lok Lew Yan Voon,Amanda Basant,Morten Willatzen,Zhong-Lin Wang

Journal

APS March Meeting Abstracts

Published Date

2023

Contact electrification is a ubiquitous phenomenon that is still poorly understood. It has been proposed as a clean energy source for the Internet of Things in triboelectric nanogenerators (TENGs). Recently, we proposed a microscopic model in one-dimension in order to study the dynamics of electrons between atomic chains. In this talk, we present an extension of the work to include charge transfer between normal and/or topological materials in one and two dimensions in order to assess the relevance of using two-dimensional materials in the design of TENGs.

On chain models for contact electrification

Authors

Javier E Hasbun,Lok C Lew Yan Voon,Morten Willatzen

Journal

Journal of Physics: Condensed Matter

Published Date

2022/1/21

An exact analytical model of charge dynamics for a chain of atoms with asymmetric hopping terms is presented. Analytic and numeric results are shown to give rise to similar dynamics in both the absence and presence of electron interactions. The chain model is further extended to the case of two atoms per cell (a perfect alloy system). This extension is further applied to contact electrification between two different atomic chains and the effect of increasing the magnitude of the contact transfer matrix element is studied.

REFEREED JOURNALS

Authors

AA Farajian,MB Ruggles-Wrenn,AJ DeGregoria,LJ Wirth,C Woodward,R Mortezaee,TH Osborn,OV Pupysheva,M Wang,A Zhamu,BZ Jang,KK Paulla,AJ Hassan,CR Knick,RS Aga,LC Lew Yan Voon,N Gorjizadeh,Y Kawazoe

Journal

Acta Materialia

Published Date

2022

Publications Amir A. Farajian Page 1 Publications Amir A. Farajian REFEREED JOURNALS 67 Porosity effects on oxidation of ultra high temperature ceramics, AA Farajian, MB Ruggles-Wrenn, and AJ DeGregoria, Journal of Materials Engineering and Performance, accepted. 66 Ab initio molecular dynamics of pipe diffusion in fcc Ni beyond transition state theory, LJ Wirth, C. Woodward, and AA Farajian, Acta Materialia 222, 117357 (2022). 65 Density functional study of self-diffusion along an isolated screw dislocation in fcc Ni, LJ Wirth, AA Farajian and C. Woodward, Phys. Rev. Materials 3, 033605 (2019). 64 Multiscale molecular thermodynamics of graphene-oxide liquid-phase exfoliation, AA Farajian, R. Mortezaee, TH Osborn, OV Pupysheva, M. Wang, A. Zhamu and BZ Jang, Phys. Chem. Chem. Phys. 21, 1761 (2019). 63 Systematic enhancement of thermoelectric figure of merit in edge-engineered nanoribbons, …

Generalized Weisskopf‐Wigner model of triboelectroluminescence

Authors

Lok C Lew Yan Voon,Javier E Hasbun,Morten Willatzen,Zhong L Wang

Journal

EcoMat

Published Date

2021/4

The phenomenon of triboelectroluminescence is studied using a generalization of the Weisskopf‐Wigner model of spontaneous emission in an electronic two‐level system. An irreversible and exponential transfer of charge results from the model. The charge transfer between two linear atomic chains is computed as a function of the separation of the two chains and as a function of the temperature. Triboelectroluminescence due to spontaneous emission is found to be more efficient when the electron states in the two materials have a larger energy separation and decays rapidly with separation. It is insensitive to temperature variation when the electrons emanate from insulators or surface states, but not when they emanate from partially‐filled bands due to the thermal excitation of the electrons.

QUANTUM THEORY OF CONTACT ELECTRIFICATION

Authors

Javier E Hasbun,LC Lew Yan Voon,Morten Willatzen,Zhong Lin Wang

Journal

Georgia Journal of Science

Published Date

2021

We present a unified quantum-mechanical model of contact electrification that provides a microscopic basis for the Volta-Helmholtz-Montgomery hypothesis. Our model can represent metals, semiconductors and insulators, in either fluid or solid phase, and with an effective electron transfer mechanism. Standard experimental results such as the charging of similar materials, surface charge mosaic, and the higher efficiency of charge transfer for a liquid-solid contact, compared to a solid-solid one, are reproduced. A quantum-mechanical charge oscillation in the femtosecond to picosecond regime is predicted to take place. Coulomb interaction is found to have an impact on not just the charge transferred but also the period of charge oscillation.

Quantum theory of contact electrification for fluids and solids

Authors

Morten Willatzen,Lok C Lew Yan Voon,Zhong Lin Wang

Journal

Advanced Functional Materials

Published Date

2020/4

A unified quantum‐mechanical model of contact electrification that provides a microscopic basis for the Volta–Helmholtz–Montgomery hypothesis is presented. The model can represent metals, semiconductors, or insulators, in either fluid or solid phase, and with an effective electron transfer parameter as the driving mechanism. Known experimental results such as the charging of similar materials, the charging of similar materials with different contact orientation, the surface charge mosaic, and the higher efficiency of charge transfer for a liquid–solid contact, compared to a solid–solid one, are reproduced. A quantum‐mechanical charge oscillation in the femtosecond to picosecond regime is predicted to take place. Coulomb interaction is found to have an impact on not just the charge transferred but also the period of charge oscillation.

Microscopic model for contact electrification between solids and fluids

Authors

Morten Willatzen,Lok Lew Yan Voon,Zhong Lin Wang

Journal

Bulletin of the American Physical Society

Published Date

2020/3/2

Triboelectric charge transfer between materials is a well-known phenomenon since more than 2000 years that still causes dispute. Recent experimental evidence suggests electron transfer to be the main mechanism for contact electrification between dielectrics and metals, and the electron transfer is specified by the material bandstructures and Fermi levels [1]. We present a new microscopic formalism based on a tight-binding Hamiltonian to describe charge transfer between two materials. The model captures charge transfer dynamics on a femtosecond scale, reveals the influence of Coulomb interactions for charge transfer oscillations, and is able to predict charge transfer differences between materials whether structured or disordered solids and fluids. We demonstrate that charge transfer between fluids and solids is more effective than between two solids, that charge transfer between two similar materials is …

See List of Professors in Lok Lew Yan Voon University(University of West Georgia)

Lok Lew Yan Voon FAQs

What is Lok Lew Yan Voon's h-index at University of West Georgia?

The h-index of Lok Lew Yan Voon has been 20 since 2020 and 30 in total.

What are Lok Lew Yan Voon's top articles?

The articles with the titles of

Charge Transfer Between Two-Dimensional Materials

Contact Electrification of Two-Dimensional Materials

On chain models for contact electrification

REFEREED JOURNALS

Generalized Weisskopf‐Wigner model of triboelectroluminescence

QUANTUM THEORY OF CONTACT ELECTRIFICATION

Quantum theory of contact electrification for fluids and solids

Microscopic model for contact electrification between solids and fluids

are the top articles of Lok Lew Yan Voon at University of West Georgia.

What are Lok Lew Yan Voon's research interests?

The research interests of Lok Lew Yan Voon are: silicene tight binding

What is Lok Lew Yan Voon's total number of citations?

Lok Lew Yan Voon has 5,820 citations in total.

What are the co-authors of Lok Lew Yan Voon?

The co-authors of Lok Lew Yan Voon are Zhong Lin Wang, Qihua Xiong, Joan Redwing, Yong Zhang, Morten Willatzen, Abdelkader Kara.

Co-Authors

H-index: 306
Zhong Lin Wang

Zhong Lin Wang

Georgia Institute of Technology

H-index: 101
Qihua Xiong

Qihua Xiong

Nanyang Technological University

H-index: 76
Joan Redwing

Joan Redwing

Penn State University

H-index: 48
Yong Zhang

Yong Zhang

University of North Carolina at Charlotte

H-index: 43
Morten Willatzen

Morten Willatzen

Danmarks Tekniske Universitet

H-index: 42
Abdelkader Kara

Abdelkader Kara

University of Central Florida

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