Article
Electrochemistry
T. Kameshima, Y. Sakamoto
Summary: This study investigated the fabrication of an inward RF plasma apparatus and its potential for removing carbon materials such as CVD diamond film and graphite plate. The results showed that the fabricated apparatus could be used for plasma etching of carbon materials, with the formation of CO deposits and preferential etching of amorphous structures.
TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING
(2022)
Article
Chemistry, Physical
Anna Dychalska, Wojciech Koczorowski, Marek Trzcinski, Lidia Mosinska, Miroslaw Szybowicz
Summary: The study investigates the structural and chemical changes in diamond layers after post-growth treatment with hydrogen through Raman spectroscopy, SEM, and XPS measurements, focusing on the micro-structural properties of diamond layers with varying grain sizes and sp(2) carbon content. The impact of hydrogenation on the surface structure and chemical composition of diamond layers is examined, taking into account the polycrystalline nature and variations within CVD diamond layers. The study involves Raman spectroscopy analysis before and after hydrogen treatment near T-shape markers on the surface of each studied diamond layer to compare results.
Article
Chemistry, Physical
K. Tamargo-Martinez, S. Villar-Rodil, A. Martinez-Alonso, J. M. D. Tascon
Summary: This study investigates the effect of low-pressure microwave discharge oxygen plasma treatment on two types of high-surface area graphite. The results show that longer plasma treatment leads to an increase in graphitic order and the formation of surface-functionalized materials without compromising their thermal stability and aromatic network. Additionally, the longer plasma exposure contributes to the development of an edge surface-functionalized graphite. Mechanical damage sub-surface caused by the milling process was also observed in one of the materials.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Kunal J. Tiwari, Robert Fonoll Rubio, Sergio Giraldo, Lorenzo Calvo-Barrio, Victor Izquierdo-Roca, Marcel Placidi, Yudania Sanchez, Alejandro Perez-Rodriguez, Edgardo Saucedo, Zacharie Jehl Li-Kao
Summary: The study presents a method to probe the depth morphology, defect profile, and possible secondary phases in thin film semiconductors. By analyzing the morphology of Kesterite films, it is found that more than 50% of the absorber is disconnected from the substrate, highlighting a potential limitation in Kesterite solar cells. Surface-sensitive techniques allow for accurate composition profiling and direct observation of defects in Kesterite.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Bakhtiar Ali, Han Xu, Dashavir Chetty, Robert T. Sang, Igor Litvinyuk, Maksym Rybachuk
Summary: The degree of laser-induced graphitization in single crystal chemical vapor deposited diamond was studied. The sp(3) phase transitions to sp(2) aromatic crystalline graphitic fraction below a critical fluence, above which amorphous carbon is formed. The increase in fluence leads to a significant increase in the depth of graphitized areas and cleavage of C=O bonds.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Brijmohan Paramanik, Debajyoti Das
Summary: In this study, diamond-like carbon (DLC) films with well distinguished nanocrystalline diamond (NCD) grains embedded in the matrix were grown on glass substrates without any pre-treatment using a specially-designed stainless-steel shadow-mask assembly. The composition of the precursor gas and gas pressure in the plasma significantly influenced the relative composition of different carbon phases in the films. The optimum NCD embedded DLC film exhibited a homogeneous microstructure with uniform distribution of NCD grains and high optical transmittance.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
A. P. Yelisseyev, A. A. Emelyanov, A. K. Rebrov, N. Timoshenko, I. B. Yudin, S. A. Gromilov, A. T. Titov, M. Yu Plotnikov
Summary: Diamond coatings were obtained on a molybdenum substrate through gas-phase deposition, with the formation of nuclei and their growth and competition being key steps. The study of coating morphology revealed the growth and deposition process of particles in the gas phase, while XRD and Raman spectroscopy analysis identified the structure and composition of the coatings.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
O. Romanyuk, J. Zemek, J. Houdkova, O. Babcenko, E. Shagieva, K. Beranova, A. Kromka, P. Jiricek
Summary: A hydrogenated nanocrystalline diamond (NCD-H) film was prepared using chemical vapor deposition (CVD) method, and the surface destruction and graphitization of NCD-H were achieved through Ar ion bombardment by monoatomic beam (Ar+) and cluster ion beam (ArCIB). ArCIB bombardment resulted in the formation of a thin altered layer on the surface of NCD-H, while Ar+ beam bombardment created a thicker, homogeneous altered layer. Multiple microscopy and spectroscopy methods were used to evaluate the contribution of C-Hx bonds to the asymmetry of the C 1s core level line shape and measure the H concentration on the surface. The study demonstrates the limitations of Auger spectroscopy (D-parameter) analysis for measuring the sp2/sp3 phase concentration on rough NCD-H surfaces. The controllable amorphization or graphitization of diamond surface can enhance its functionality in detectors, electrochemical sensing, or supercapacitor applications.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Venkatesh Ramasamy, Pumlianmunga, Ramesh Karuppannan
Summary: Crystalline carbon nitride (C3N4) was successfully synthesized using a simple pyrolysis assisted chemical vapor deposition (CVD) method. The microstructural investigation revealed nanostructures with sheet and nanotube structures. Spectroscopic and XPS analysis confirmed the presence of carbon nitride in the material, and a red-shift in the Raman spectrum indicated the influence of nitrogen introduction on the carbon network.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Multidisciplinary Sciences
Jiahua Zhou, Piaoping Yang, Pavel A. Kots, Maximilian Cohen, Ying Chen, Caitlin M. Quinn, Matheus Dorneles de Mello, J. Anibal Boscoboinik, Wendy J. Shaw, Stavros Caratzoulas, Weiqing Zheng, Dionisios G. Vlachos
Summary: Investigated the role of oxygen-containing functional groups in carbon materials and found that phenolic groups are the main acid sites in gas-phase reactions, while carboxylic groups are less acidic. Developed a methodology to identify acid sites in oxygenated carbon materials using comprehensive surface characterizations and calculations.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Li Jin, Changbao Zhao, Zhongmiao Gong, Jiaqi Pan, Wei Wei, Guoqing Wang, Yi Cui
Summary: Hydrogen plays a significant role in the growth of graphene by metal-based chemical vapor deposition, accelerating growth and improving quality. The presence of a certain proportion of hydrogen can promote the growth of graphene by weakening the overlayer-substrate interaction. This study provides insights into the controllable growth of graphene in the presence of hydrogen.
SURFACES AND INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Dhananjay K. Sharma, Ana Girao, Patrick Chapon, Miguel A. Neto, Filipe J. Oliveira, Rui F. Silva
Summary: In this study, pulsed RF glow discharge optical emission spectrometry (GD-OES) combined with ultrafast sputtering (UFS) was used to accurately measure the elemental depth profiles and bulk distribution of boron in diamond thin films. The results showed a nonhomogeneous distribution of boron within the diamond crystalline structure, and the effective doping was not linearly correlated to the increasing boron content.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Inorganic & Nuclear
Ranhao Wang, Haiyuan Zou, Renji Zheng, Xuezhen Feng, Jiaoyan Xu, Yangzi Shangguan, Siyuan Luo, Wenfei Wei, Dazhong Yang, Wen Luo, Lele Duan, Hong Chen
Summary: The Langmuir adsorption model is widely used in environmental chemistry to describe monolayer adsorption behavior at material interfaces. However, traditional adsorption dynamic modeling often overlooks the surface chemical reaction dynamics of the adsorbent, which is rarely considered in experiments. This study demonstrates through experiments that there is a complex molecular dynamics process occurring at the GO-Cl interface, which significantly deviates from the monolayer adsorption mechanism suggested by Langmuir adsorption curvefitting.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Wenliang Zhu, Kazuyuki Arao, Elia Marin, Tatsuro Morita, Morimasa Nakamura, Paola Palmero, Jean-Marc Tulliani, Laura Montanaro, Giuseppe Pezzotti
Summary: This paper analyzes the effects of secondary phases in ZrO2 substrates on the structure of DLC films and their structural stability under indentation prints. The results show that oxygen from the oxide substrates is incorporated into the DLC films during deposition, and the sp(3) carbon content depends on the oxygen fraction and gas pressure. Moreover, structural distortion at the film/substrate interface and changes in Raman spectral morphology of carbon induced by structural alterations are observed.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Physics, Applied
Jesse M. Brown, Saurabh Vishwakarma, David J. Smith, Robert J. Nemanich
Summary: In this study, cubic boron nitride (c-BN) films were successfully deposited on boron-doped diamond substrates via electron cyclotron resonance plasma enhanced chemical vapor deposition (ECR-PECVD). The growth of BN films was characterized using in situ x-ray photoelectron spectroscopy (XPS), and it was found that the growth rate increased with increased hydrogen gas flow. Excess hydrogen gas resulted in the formation of hexagonal BN (h-BN), while reducing the hydrogen flow minimized the h-BN formation. The results showed that a limited hydrogen reaction favored the growth of c-BN on boron-doped diamond.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
I. Villalpando, P. John, S. Porro, J. I. B. Wilson
Article
Materials Science, Multidisciplinary
E. Jimenez-Marin, I. Villalpando, M. Trejo-Valdez, F. Cervantes-Sodi, J. R. Vargas-Garcia, C. Torres-Torres
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2017)
Article
Materials Science, Multidisciplinary
E. Jimenez-Marin, I. Villalpando, M. Trejo-Valdez, F. Cervantes-Sodi, J. R. Vargas-Garcia, C. Torres-Torres
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2017)
Article
Chemistry, Analytical
Eric Abraham Hurtado-Aviles, Jesus Alejandro Torres, Martin Trejo-Valdez, Guillermo Urriolagoitia-Sosa, Isaela Villalpando, Carlos Torres-Torres
Article
Chemistry, Physical
E. A. Hurtado-Aviles, J. A. Torres, M. Trejo-Valdez, B. Romero-Angeles, I Villalpando, C. Torres-Torres
JOURNAL OF MOLECULAR LIQUIDS
(2018)
Article
Multidisciplinary Sciences
Jae-Kap Lee, Jin-Gyu Kim, K. P. S. S. Hembram, Yong-Il Kim, Bong-Ki Min, Yeseul Park, Jeon-Kook Lee, Dong Ju Moon, Wooyoung Lee, Sang-Gil Lee, Phillip John
SCIENTIFIC REPORTS
(2016)
Article
Chemistry, Physical
Eric Abraham Hurtado-Aviles, Jesus Alejandro Torres, Martin Trejo-Valdez, Christopher Rene Torres-SanMiguel, Isaela Villalpando, Carlos Torres-Torres
Article
Biotechnology & Applied Microbiology
Susana Perrusquia-Luevano, Marlene Sarahi Cano-Herrera, Cesar Guigon-Lopez, Maria del Carmen Avitia-Talamantes, Carlos Torres-Torres, Isaela Villalpando
FEMS YEAST RESEARCH
(2019)
Article
Biotechnology & Applied Microbiology
L. F. Salcedo-Hernandeza, S. Morales-Bonilla, I. Villalpando, C. R. Torres-San Miguel, M. Trejo-Valdez, C. Torres-Torres
CURRENT NANOSCIENCE
(2017)
Article
Materials Science, Multidisciplinary
I. Villalpando, P. John, S. Porro, J. I. B. Wilson
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2017)
Article
Physics, Multidisciplinary
I. Villalpando, P. John, J. I. B. Wilson
REVISTA MEXICANA DE FISICA
(2017)
Article
Chemistry, Physical
Geselle Garcia-Beltran, Cecilia Mercado-Zuniga, Christopher Rene Torres-SanMiguel, Martin Trejo-Valdez, Isaela Villalpando, Carlos Torres-Torres
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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)