4.6 Article

Compounded effect of vacancy on interfacial thermal transport in diamond-graphene nanostructures

Journal

DIAMOND AND RELATED MATERIALS
Volume 20, Issue 8, Pages 1137-1142

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2011.06.019

Keywords

Diamond; Graphene; Vacancy; Interface; Thermal transport

Funding

  1. Nanyang Research Scholarship
  2. MOE Tier 2 Fund

Ask authors/readers for more resources

By employing molecular dynamics simulations, it is observed that the distance of the vacancy(s) from the diamond-graphene interface is a determinant of interfacial resistance. In this study, we explain this relationship in two inter-related approaches. (1) A vacancy situated close to the interface reduces the interfacial resistance, suggesting that phonon dynamics around the vacancy contribute to reduce the interfacial barrier. Vibrational density of state calculations show that phonon scattering processes at an interfacial vacancy(s) influence the interfacial transmission significantly. This is attributed to inelastic mode conversion processes at the vacancy(s) that create modes with frequencies and velocities which match well with those in the interfacial diamond, resulting in the drop of interfacial thermal resistance as the location of vacancy approaches the interface. (2) Radial distribution function analyses indicate the conformity nature of interfacial diamond bonds and the contraction/lengthening of interfacial graphene bonds as the vacancy position is varied. These structural changes improve/weaken the matching of the interfacial bond length and result in mode conversion processes that modify the amount of mismatch in the vibrational density of states and phonon velocities in the two media. (C) 2011 Elsevier B.V. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

Article Nanoscience & Nanotechnology

Enhanced Tunneling Magnetoresistance Effect via Ferroelectric Control of Interface Electronic/Magnetic Reconstructions

Xiao Chi, Rui Guo, Juxia Xiong, Lizhu Ren, Xinwen Peng, Beng Kang Tay, Jingsheng Chen

Summary: The study demonstrates a significant ferroelectric modulation of TMR in ferroelectric/magnetic MTJs, highlighting the interface electronic and magnetic reconstructions driven by ferroelectric polarization switching. This robust coupling between BTO and LSMO at the interface results in a giant electrical modulation of TMR, shedding new light on the intrinsic mechanisms governing magnetoelectric coupling for spin control in spintronic devices.

ACS APPLIED MATERIALS & INTERFACES (2021)

Article Chemistry, Analytical

Graphitisation of Waste Carbon Powder with Femtosecond Laser Annealing

Lucas Lum, Chong-Wei Tan, Chun Fei Siah, Kun Liang, Beng Kang Tay

Summary: This study reports on the graphitisation of waste carbon powder through femtosecond laser annealing, resulting in improved electrical conductivity. Raman spectroscopy showed a transition from amorphous-like carbon to graphitic-like carbon, with conductivity increasing by up to 90%. An increase in laser power correlated with increased conductivity, but excessive power had a destructive effect. The most significant improvement in conductivity was observed at laser powers ranging from 0.526 to 1.286 W.

MICROMACHINES (2022)

Article Chemistry, Multidisciplinary

3D Porous Graphene Films with Large-Area In-Plane Exterior Skins

Roland Yingjie Tay, Hongling Li, Zhi Kai Ng, Siu Hon Tsang, Wei Gao, Edwin Hang Tong Teo

Summary: In this study, a new method was developed to synthesize high-quality porous graphene film by incorporating an in situ reduction-oxidation cycling treatment. The graphene film exhibited a holey surface with interconnected ligaments within its porous interior, resulting in superior in-plane electrical conductivity. Compared to state-of-the-art electromagnetic interference shielding materials, this porous graphene film showed excellent performance with high specific and absolute shielding effectiveness.

ADVANCED MATERIALS INTERFACES (2022)

Article Chemistry, Analytical

Low-Power Magnetron Sputtering Deposition of Antimonene Nanofilms for Water Splitting Reaction

Xingli Wang, Junyu Ge, Nicole Ru-Xuan Ang, Kun Liang, Chong-Wei Tan, Hong Li, Beng Kang Tay

Summary: In this study, Sb nanofilms with lateral dimensions on the centimeter scale and controllable film thickness were successfully prepared using low-power magnetron sputtering deposition. The control of the deposition temperature was found to be important for the final crystalline structure of the nanofilms. Furthermore, the application of the nanofilms as a catalyst for water splitting was demonstrated.

MICROMACHINES (2022)

Review Physics, Applied

Emerging tunable window technologies for active transparency tuning

M. Shrestha, G. K. Lau, A. K. Bastola, Z. Lu, A. Asundi, E. H. T. Teo

Summary: Most modern high-rise buildings use glass facades, but this can result in issues such as compromised visual privacy and energy loss. Optically tunable windows, which can adjust daylighting, heat radiation, and transparency, are seen as a potential solution. However, existing commercial options have limitations, such as high cost and limited performance. Therefore, researchers are exploring low-cost actively tunable windows. However, most of these emerging technologies do not meet all the requirements. To fully understand and improve these technologies, an in-depth review of their optical principles is essential.

APPLIED PHYSICS REVIEWS (2022)

Article Chemistry, Multidisciplinary

Stability of Wafer-Scale Thin Films of Vertically Aligned Hexagonal BN Nanosheets Exposed to High-Energy Ions and Reactive Atomic Oxygen

Shiyong Huang, Zhi Kai Ng, Hongling Li, Apoorva Chaturvedi, Jian Wei Mark Lim, Roland Yingjie Tay, Edwin Hang Tong Teo, Shuyan Xu, Kostya (Ken) Ostrikov, Siu Hon Tsang

Summary: This study demonstrates the excellent stability of hexagonal boron nitride nanosheets (hBNNS) under extreme conditions such as high-energy ions and reactive atomic oxygen. The results highlight the potential of hBNNS films as protective, thermally conductive, and insulating layers in spacecrafts, electric plasma satellite thrusters, and semiconductor optoelectronic devices.

NANOMATERIALS (2022)

Review Engineering, Mechanical

Electromechanical Actuators for Haptic Feedback with Fingertip Contact

Jueyu Chen, Edwin Hang Tong Teo, Kui Yao

Summary: Haptic technology, which uses actuators to provide tactile feedback for human-computer interaction, is increasingly being applied in electronic devices. This review compares four types of electromechanical actuators: electromagnetic, electrostatic, piezoelectric, and electrostrictive actuators, for achieving haptic feedback. The driving principles, working conditions, applicable scopes, and characteristics of these actuators are fully compared. The design and values of piezoelectric actuators for achieving sophisticated and high-definition haptic effects are particularly emphasized. The current status and future directions of different types of haptic actuators are discussed.

ACTUATORS (2023)

Article Biotechnology & Applied Microbiology

Ink-based transparent compliant electrode for direct coating on untreated hydrophobic PDMS surface

Milan Shrestha, Leonardus Depari, Maziar Shakerzadeh, Ranjana Shivakumar, Edwin H. T. Teo

Summary: Researchers developed a viscous composite ink with PEDOT:PSS and PDMS for coating on untreated PDMS, allowing for more uniform and adhesive ink-based electrodes. These coatings are transparent, stretchable, electrically conductive, and act as compliant electrodes. They also fabricated transparent dielectric elastomer actuators using PEDOT:PSS/PDMS electrodes, which had slightly lower actuation strain and breakdown fields compared to traditional graphite electrodes, but improved robustness in localized dielectric breakdown events.

SENSORS AND ACTUATORS REPORTS (2023)

Article Nanoscience & Nanotechnology

Flexible Graphene/MXene Composite Thin Films for High-Performance Electromagnetic Interference Shielding and Joule Heating

Hongling Li, Zhi Kai Ng, Roland Yingjie Tay, Shiyong Huang, Siu Hon Tsang, Edwin Hang Tong Teo

Summary: In this study, graphene/MXene composite thin films with excellent flexibility and EMI shielding capability were fabricated. The composite thin films exhibited high EMI shielding effectiveness and superb electrothermal conversion capability, providing a facile method for EMI shielding and thermal management applications in next-generation flexible electronics.

ACS APPLIED NANO MATERIALS (2023)

Article Engineering, Electrical & Electronic

E-Band Vertically Aligned Carbon Nanotubes-Based Air-Filled Waveguide

Joseph M. de Saxce, Chun Fei Siah, Tan Chong Wei, Damien Passerieux, Stephane Bila, Florence Podevin, Beng Kang Tay, Philippe Coquet, Dominique Baillargeat

Summary: This letter presents a novel E-band vertically aligned carbon nanotubes-based air-filled waveguide (AFWG). The waveguide is designed using a full-wave three-dimensional electromagnetic software and an equivalent VACNTs bulk model, and fabricated using a CMOS compatible CNTs transfer process and a dedicated assembly process. The concept of the CNTs-based AFWG is validated for the first time through measurements, with an experimental attenuation constant estimated at 0.5 dB/mm between 81 and 86 GHz.

IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS (2023)

Article Engineering, Electrical & Electronic

Performance Optimization of Atomic Layer Deposited HfOx Memristor by Annealing With Back-End-of-Line Compatibility

Hong Chen, Lianzheng Li, Jinbin Wang, Guangchao Zhao, Yida Li, Jun Lan, Beng Kang Tay, Gaokuo Zhong, Jiangyu Li, Mingqiang Huang

Summary: In this study, the performance of hafnium oxide memristor has been optimized using low-temperature atomic layer deposition and post-metal annealing methods. The device exhibits high performance and compatibility with the CMOS back-end-of-line process, making it a potential candidate for implementing artificial intelligence neural networks.

IEEE ELECTRON DEVICE LETTERS (2022)

Article Engineering, Electrical & Electronic

Global-Gate Controlled One-Transistor One-Digital-Memristor Structure for Low-Bit Neural Network

Mingqiang Huang, Guangchao Zhao, Xingli Wang, Wei Zhang, Philippe Coquet, Beng Kang Tay, Gaokuo Zhong, Jiangyu Li

Summary: This work presents a neuromorphic computing system based on memristors, utilizing a global gate controlled one transistor one digital memristor (1T1DM) architecture as the basic binary electronic synapse. The system successfully implements low-bit neuromorphic computing, offering a lightweight, robust alternative to traditional analogue memristor networks for challenging visual tasks.

IEEE ELECTRON DEVICE LETTERS (2021)

Article Materials Science, Multidisciplinary

Dielectric dispersion and superior thermal characteristics in isotope-enriched hexagonal boron nitride thin films: evaluation as thermally self-dissipating dielectrics for GaN transistors

Soon Siang Chng, Minmin Zhu, Zehui Du, Xizu Wang, Matthew Whiteside, Zhi Kai Ng, Maziar Shakerzadeh, Siu Hon Tsang, Edwin Hang Tong Teo

JOURNAL OF MATERIALS CHEMISTRY C (2020)

Article Materials Science, Multidisciplinary

A flexible and ultra-broadband terahertz wave absorber based on graphene-vertically aligned carbon nanotube hybrids

Dongyang Xiao, Minmin Zhu, Qian Wang, Leimeng Sun, Chun Zhao, Zhi Kai Ng, Edwin Hang Tong Teo, Fangjing Hu, Liangcheng Tu

JOURNAL OF MATERIALS CHEMISTRY C (2020)

Article Materials Science, Multidisciplinary

Nitrogen-mediated aligned growth of hexagonal BN films for reliable high-performance InSe transistors

Soon Siang Chng, Minmin Zhu, Jing Wu, Xizu Wang, Zhi Kai Ng, Keke Zhang, Chongyang Liu, Maziar Shakerzadeh, Siuhon Tsang, Edwin Hang Tong Teo

JOURNAL OF MATERIALS CHEMISTRY C (2020)

Article Materials Science, Multidisciplinary

Uniform Co9S8 nanosheets on carbon nanotube arrays grown on Ni mesh as free-standing electrodes for asymmetric supercapacitors

Shuanghui Zeng, Xue Wang, Yunqian Zhang, Jiaojing Shao, Zhao Ding, Jie Zhao

Summary: A free-standing 3D core/shell composite material CNTs@Co9S8 on nickel mesh has been prepared using a simple two-step method. The composite material exhibits excellent conductivity and charge storage capability, making it a promising candidate for supercapacitor applications.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

Antibacterial properties of metal nanoparticles-incorporated activated carbon composites produced from waste biomass precursor

Marieta Belcheva, Georgi Georgiev, Boyko Tsyntsarski, Urszula Szeluga, Lyudmila Kabaivanova

Summary: This study successfully prepared new antibacterial materials by combining activated carbon with metal nanoparticles, taking advantage of the well-known antibacterial activity of metal nanoparticles. The obtained composites exhibited strong antibacterial effects against E. coli and S. aureus, with the antibacterial activity depending on the contact time, bacterial species, nature of the metal, and metal concentration. The findings provide novel materials with antibacterial properties for further development and potential application in hygiene devices.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

Synthesis and study of carbon nanomaterials through arc discharge technique for efficient adsorption of organic dyes

V. P. Madhurima, Kusum Kumari, P. K. Jain

Summary: In this study, carbon nanomaterials were synthesized using the arc discharge technique, with a focus on optimizing process parameters to improve yield and quality. The materials were characterized using various analytical tools, and their dye adsorption capabilities were evaluated. The results showed that carbon soot had better adsorption performance compared to carbon nanotubes, indicating the potential of these carbon nanomaterials for environmental remediation applications.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

Theoretical prediction of hafnium-terminated diamond (100) surface with promising negative electron affinity for electron emission applications

Zhaolong Sun, Bo Cui, Pingping Liang, Qimeng Liu, Nan Gao, Hongdong Li

Summary: This study explores the potential of hafnium (Hf) terminated diamond surfaces in achieving negative electron affinity (NEA). By using swarm-intelligence structural search and first-principles calculations, the researchers found that Hf-terminated diamond surfaces exhibit stable NEA properties and high thermal stability, making them promising candidate materials for electron emission applications.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

Electrochemical measurement of naproxen in the presence of diclofenac and ascorbic acid using Gr/ZnFe2O4/CPE

N. Soltani, N. Tavakkoli, E. Eslami, L. S. Mirmohammadi

Summary: In this project, a carbon paste electrode modified with graphene and ZnFe2O4 spinel nanoparticles (Gr/ZnFe2O4/CPE) was used to measure naproxen, and various electrochemical methods were used to investigate its behavior. By optimizing the parameters, good measurement results were obtained.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

Comparing the tribological behavior of polycrystalline diamonds against steel GCr15 and ceramic Si3N4: friction and wear

Xiwei Cui, Yue Qin, Xin Han, Huanyi Chen, Xinxin Ruan, Hui Zhang, Chengcheng Jiao, Rongqi Mao, Jinglin Hao, Sizhuang Zhao, Shuai Hou, Xiaoxuan Pian, Yandong Wang, Kazuhito Nishimura, Lifen Deng, Nan Jiang

Summary: This paper investigates the friction and wear behaviors of two types of polycrystalline diamonds against different materials. The results show that increasing surface roughness leads to an increase in coefficient of friction. The coefficient of friction and wear rate of ceramic Si3N4 balls are generally lower than those of steel GCr15 balls, except for one type of polycrystalline diamond. Transfer films of SiO2 and its hydrate are observed at the friction interface, which contribute to smoother friction and wear. Carbon-based transfer films are also identified, mainly catalyzed by residual cobalt in the polycrystalline diamonds, leading to a phase transformation.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

Carbonized polymer dots-silver nanoclusters nanocomposite with dual-emission for property ratiometric fluorescence and visual detection of temperature

Menglei Sun, Pengjun Li, Mao Wang, Yidan Liang, Xudong Yang, Shujie Pang

Summary: In this study, carbonized polymer dots were synthesized by a one-step hydrothermal method, and silver nanoclusters were synthesized by UV lamp irradiation. They were then self-assembled by electrostatic force to prepare a dual-emission fluorescent nanocomposite that responds to temperature changes. The nanocomposite showed two emission peaks and exhibited excellent linearity between 20°C and 80°C.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

The potential of 2D carbon nitride monolayer as an efficient adsorbent for capturing mercury: A DFT study

Mohamed J. Saadh, Durgesh Singh, Diego Mayorga, Anjan Kumar, Maria Albuja, Ahmad Ismael Saber, Mohammed Ahmed Mustafa, Yasser Elmasry, Noubu Sun

Summary: Based on density functional theory, it is found that the C3N monolayer has good adsorption capability for Hg0 and a short recovery time. This study suggests that the C3N monolayer is a promising adsorbent material for efficient control of gaseous mercury.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

CNTs supported NiCo2O4 nanostructures as advanced composite for high performance supercapacitors

Rajendra Kumar Nare, Sivalingam Ramesh, Vijay Kakani, Yuvaraj Haldorai, Chandrasekaran Karthikeyan, Basivi Praveen Kumar, Nadavala Siva Kumar, Mohammad Asif, S. Naresh Kumar, D. Prakash Babu, K. Ramakrishna Reddy, Visweswara Rao Pasupuleti

Summary: This study examines the latest advancements in carbon nanotube (CNT) supercapacitors and related composites, aiming to identify strategies for enhancing their performance. The researchers used ultrasonication aided hydrothermal technique to synthesize a composite made of nitrogen doped carbon nanotubes and porous NiCo2O4 nanomaterial. The composite electrode exhibited excellent cycling stability and a rising specific capacitance, making it appealing for high-performance supercapacitor applications.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

Peculiar nonlinear optical absorption and optical limiting behaviors of bismuth-based binary and ternary nanostructures

D. Mary Deena, S. Arockia Anushya, A. Dhanusha, T. C. Sabari Girisun, A. Philominal

Summary: A single-beam Z-Scan experiment was conducted to investigate the nonlinear optical absorption and optical limiting properties of Bi2O3, rGO/Bi2O3, Bi2O3/WO3, and rGO/Bi2O3/WO3 nanostructures. The results showed that the synthesized nanostructures exhibited varying levels of nonlinear absorption, with bismuth-based nanostructures showing the lowest optical limiting threshold and a higher two-photon absorption coefficient. The presence of rGO contributed to the extended conjugation for charge transfer, while the strong UV-Visible absorption of Bi2O3 and WO3 led to a unique nonlinear optical response.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

Study on the structure and thermal properties of graphite/copper laminated composites assembled by Ti-containing active filler metals

Weibing Guo, Yiren Hu, Tao Wang, Xiaoguang Chen

Summary: This study investigated the microstructure and forming mechanism of graphite/copper joints that were brazed using Ti-containing filler. The results showed that increasing the brazing temperature improved the heat transfer and tensile properties of the composites. Additionally, the composites exhibited high heat flux and faster heating rate compared to copper and aluminum.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

The effect of Ni content in metal solvent on diamond growth and N-related defects

Ming Li, ZhiWen Wang, Yu Teng, Hongyu Zhao, Bowei Li, Yang Liu, Shengxue Wang, Zhenze Yang, Liangchao Chen, Hongan Ma, Xiaopeng Jia

Summary: In the experiment, different Ni-content catalysts were used to synthesize diamond crystals, and the properties of the synthesized diamonds were analyzed. The results revealed that the Ni content in the catalyst affects the crystallinity of diamond crystals and the nitrogen crystallinity. The photoluminescence spectroscopy also showed that the diamond synthesized by using Fe-containing catalyst has specific NV-color center structure.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

Applying recurrent neural networks to predict the work function of metal adatom adsorption on graphene

Ling-Feng Mao

Summary: This study proposes an LSTM model to predict the work function of adsorbed metal atoms on graphene, which can quickly screen surface structures with target work function, saving computing and time costs, and improving device performance.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

The synergistic mechanism of transition layer and transfer layer on dry sliding wear of multi-layered diamond-like carbon (DLC) coating at wide temperature

Runzhou Xu, Yinshui Liu, Qian Cheng, Zhenyao Wang, Kai Ma, Peiling Ke, Yipan Deng

Summary: The wear resistance of 17-4PH stainless steel was significantly improved by depositing multi-layered Cr/CrC/DLC coating at wide temperature range. The coating exhibited excellent lubrication and protective properties, and the wear mechanism changed with increasing temperature. The tribochemical reaction during the wear process played a crucial role in the graphitization transformation and friction properties of the coating.

DIAMOND AND RELATED MATERIALS (2024)

Article Materials Science, Multidisciplinary

Evidencing contributions arising from disorder-rich rhombohedral stacking-order regions in S-doped carbon nanotube buckypapers

Xilong Guo, Jiaxin Song, Shanling Wang, Li Lei, Omololu Odunmbaku, Ayoub Taallah, Yi He, Aiqun Gu, Filippo S. Boi

Summary: The recent observations of superconductive-ordering in carbon-based systems consisting of rhombohedral stacking-faults, trilayer graphene (ABC-stacks) or dislocation-rich interfaces (pyrolytic graphite) have attracted significant attention. In this study, an unusual nucleation of rhombohedral stacking-faults in low-dimensional systems comprising of multiwall carbon nanotube (CNT) buckypapers was reported. The presence of sulfur doping resulted in a broad-band at the Raman shift from 1800 to 2000 cm(-1), indicating contributions arising from disorder-rich regions with rhombohedral stacking-order (ABC-stacks). These observations were further supported by X-ray diffraction and Rietveld refinements.

DIAMOND AND RELATED MATERIALS (2024)