Article
Chemistry, Physical
Qianyu Ji, Bowen Wang, Yajuan Zheng, Xueping Yan, Fanguang Zeng, Bingheng Lu
Summary: The study introduces bulk graphene/carbon nanotubes hybrid materials for field emission applications, showcasing excellent stability and high efficiency. These bulk emitters are suitable for high-power cold cathode applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Siru He, Xuda Hong, Hairong Zheng, Dong Liang
Summary: The study demonstrates that modifying the commonly used compact and planar titanium alloy substrate using an alkali approach can enhance the adhesion with screen-printed carbon nanotube cathodes and significantly improve device performance, providing a practical strategy for further enhancement of field emission performance.
Article
Chemistry, Analytical
QingYi Meng, Shuhua Wei, Zhiyuan Xu, Qiang Cao, Yushi Xiao, Na Liu, Huan Liu, Gang Han, Jing Zhang, Jiang Yan, Alexander P. Palov, Lidong Wu
Summary: This study improved the performance of SWCNT-FET sensors by introducing P4VP and HfO2, resulting in a high sensitivity and low detection limit for Cu2+, making it a promising choice for the future manufacturing of custom sensors.
ANALYTICA CHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Gulshan Kumar, Harsh Gupta, Santanu Ghosh, Pankaj Srivastava
Summary: In this study, the growth of CNTs on Au patterned substrate was found to be temperature-dependent, with nearly 180% enhancement in current density compared to non-patterned silicon substrate. This enhancement was primarily attributed to reduced electric field screening near the edges of the patterned substrate.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Chemistry, Multidisciplinary
Hongbin Tang, Ruizi Liu, Weijun Huang, Wei Zhu, Weijin Qian, Changkun Dong
Summary: Multi-walled carbon nanotubes (MWNTs) were grown directly on a metal substrate with the assistance of Pt using a chemical vapor deposition method. Pt was found to accelerate the decomposition of the carbon source gas, aiding in the growth of longer and higher quality MWNTs. The Pt-assisted MWNTs also exhibited improved field emission properties and stability.
Article
Chemistry, Physical
Xiaozhi Xu, Ruixi Qiao, Zhihua Liang, Zhihong Zhang, Ran Wang, Fankai Zeng, Guoliang Cui, Xiaowen Zhang, Dingxin Zou, Yi Guo, Can Liu, Ying Fu, Xu Zhou, Muhong Wu, Zhujun Wang, Yue Zhao, Enke Wang, Zhilie Tang, Dapeng Yu, Kaihui Liu
Summary: The latest semiconductor technology is based on the successful production of silicon ingots with extremely high purity levels, as well as the future high-end applications of graphene in electronics and optoelectronics. The research proposes a method to produce ultra-pure graphene grown on copper by eliminating both dot and point defects in graphene grains. This work paves the way for the production of intrinsically pure graphene, laying the foundation for large-scale graphene applications at the integrated-circuit level.
Article
Engineering, Environmental
Ahmed I. EL-Seesy, Mahmoud S. Waly, Hesham M. El-Batsh, Radwan M. El-Zoheiry
Summary: Nitrogen-doped multiwalled carbon nanotubes (N-doped MWCNTs) are effective catalysts that can improve diesel engine performance and reduce exhaust emissions. Adding N-doped MWCNTs to diesel fuel significantly enhances combustion behavior, engine performance, and exhaust emission analysis. It increases in-cylinder pressure and heat release rate, improves brake thermal efficiency, reduces brake specific fuel consumption, and significantly reduces NOx, soot, and CO formations in exhaust emissions compared to diesel and MWCNTs blends.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Chemistry, Multidisciplinary
Ming Liu, Kaoru Hisama, Yongjia Zheng, Mina Maruyama, Seungju Seo, Anton Anisimov, Taiki Inoue, Esko Kauppinen, Susumu Okada, Shohei Chiashi, Rong Xiang, Shigeo Maruyama
Summary: Coaxial synthesis of single-walled and multiwalled molybdenum disulfide (MoS2) nanotubes on boron nitride nanotubes (BNNTs) was achieved by removing single-walled carbon nanotubes (SWCNTs) from heteronanotubes. Single-walled MoS2 nanotubes exhibit direct bandgap structure around 6-7 nm diameter, with a transition from indirect to direct gap above 5.2 nm. Presence of SWCNTs in BNNTs and single-walled MoS2 nanotubes significantly quenches the PL signal.
Article
Chemistry, Multidisciplinary
Yusuke Nakanishi, Shinpei Furusawa, Yuta Sato, Takumi Tanaka, Yohei Yomogida, Kazuhiro Yanagi, Wenjin Zhang, Hiroshi Nakajo, Soma Aoki, Toshiaki Kato, Kazu Suenaga, Yasumitsu Miyata
Summary: The structural diversity and chemical variations of single-walled transition metal dichalcogenide nanotubes templated by boron nitride nanotubes are reported. This template reaction provides a universal platform for studying the chirality-dependent properties of one-dimensional nanotubes with different electronic structures.
ADVANCED MATERIALS
(2023)
Article
Physics, Applied
Elmira Pajootan, Minnan Ye, Muyang Zhang, Sogol Niroumandrad, Sasha Omanovic, Sylvain Coulombe
Summary: In this study, multi-walled carbon nanotubes (MWCNTs) directly grown on a stainless steel mesh were functionalized using a fast, solvent-free radiofrequency (RF) plasma technique. The functionalized MWCNT electrodes showed improved capacitive behavior, particularly the MWCNT electrode functionalized with the RF plasma employing the Ar/C2H6/O-2 gas mixture at 20 W for 15 min, which achieved the highest capacitance.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Palash Chandra Maity, Subham Gandhi, Manuj Dixit, Indranil Lahiri
Summary: Carbon nanotubes (CNTs) have shown great potential for various applications for over two decades, and chemical vapor deposition (CVD) is known as an economically feasible method for producing high-quality CNTs. This study successfully synthesized CNTs on low-melting, conducting substrates such as aluminum using thermal CVD, where the diameters of the CNTs were influenced by process parameters like temperature and pressure. Increasing temperature and pressure were found to have a significant effect on the diameters of the CNTs, with field emission properties being excellent at specific synthesis conditions.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2021)
Article
Horticulture
Yang Li, Min Liu, Xiangli Yang, Yi Zhang, Hongtai Hui, Dongqing Zhang, Jing Shu
Summary: Appropriate concentration of MWCNTs can significantly enhance the reducing ability of grape seedlings under salt stress by maintaining a high antioxidant capacity through direct and indirect antioxidant systems, such as the AsA-GSH cycle.
SCIENTIA HORTICULTURAE
(2022)
Article
Engineering, Multidisciplinary
Muthusamy Saranya, Janne T. Koivisto, Ana C. M. Carvalho, Fernando Sato, Andrea Lassenberger, Lionel Porcar, Baleeswaraiah Muchharla, Saikat Talapatra, Birgitte H. McDonagh, Lauriane Janssen, Olli Pitkanen, Minna Kellomaki, Krisztian Kordas, Gabriela S. Lorite
Summary: Injectable scaffolds are a promising strategy for tissue repair and regeneration. The design of an aligned injectable hydrogel-based scaffold via remote-induced alignment is reported in this study. The use of low magnetic field to align carboxylated multi-walled carbon nanotubes into the hydrogel is demonstrated, showing potential for engineering functional tissues with specific cell orientation.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Chemistry, Analytical
Changkun Dong, Ruizi Liu, Jie Wang, Haipeng Yu, Song Kang, Weijun Huang, Weikang Jia, Weijin Qian
Summary: A novel low pressure helium sensing method using carbon nanotube field emission has been developed, showing promising applications in leak detection. By analyzing the field emission currents from multi-walled carbon nanotubes with low crystallinities, it was found that the work functions of CNT emitters remained consistent with helium adsorptions. The simulation results showed that adsorption of helium atoms on carbon atoms at defects enhanced the field emission current, enabling the detection of helium gas.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Junzhu Li, Mingguang Chen, Abdus Samad, Haocong Dong, Avijeet Ray, Junwei Zhang, Xiaochuan Jiang, Udo Schwingenschlogl, Jari Domke, Cailing Chen, Yu Han, Torsten Fritz, Rodney S. Ruoff, Bo Tian, Xixiang Zhang
Summary: This study demonstrates a method for achieving high-quality wafer-scale single-crystal graphene on sapphire substrates, which opens up new possibilities for electronic and optoelectronic applications by epitaxially growing graphene at the Cu(111)/sapphire interface and detaching the Cu film.
Article
Chemistry, Multidisciplinary
Chiwon Kang, Eunho Cha, Sang Hyub Lee, Wonbong Choi
Review
Materials Science, Multidisciplinary
Santanu Das, Pitchaimuthu Sudhagar, Yong Soo Kang, Wonbong Choi
JOURNAL OF MATERIALS RESEARCH
(2014)
Article
Nanoscience & Nanotechnology
Santanu Das, Debrupa Lahiri, Arvind Agarwal, Wonbong Choi
Article
Electrochemistry
Eunho Cha, Hongkyung Lee, Wonbong Choi
Article
Nanoscience & Nanotechnology
Wonbong Choi, Junyoung Kim, Eunho Lee, Gayatri Mehta, Vish Prasad
Summary: The study demonstrates that meticulous defect engineering can significantly enhance the piezoelectric effect of large-scale sputtered, asymmetric 2D MoS2, resulting in outstanding piezoelectric performance and excellent stability. The sulfur vacancy density is positively correlated with the piezoelectric strength, which increases with the annealing temperature.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Juhong Park, Sanket Bhoyate, Young-Hoon Kim, Young-Min Kim, Young Hee Lee, Patrick Conlin, Kyeongjae Cho, Wonbong Choi
Summary: By studying the high ion conductivity of Li+, Na+, and K+ in 2D MoS2 nanofilm, a new understanding of the formation mechanism of novel ion channels has been revealed. This discovery provides new insights and methods for the preparation of superionic conductivity devices.
Article
Nanoscience & Nanotechnology
Zoriana Demchuk, Jiadeng Zhu, Bingrui Li, Xiao Zhao, Nurul Md. Islam, Vera Bocharova, Guang Yang, Hongyu Zhou, Yijie Jiang, Wonbong Choi, Rigoberto Advincula, Peng-Fei Cao
Summary: In this study, the improved interfacial adhesion of CF/epoxy composites by covalent bonding is reported. The result shows that this method enhances the mechanical properties and thermal aging performance of the composites. Raman mapping and finite elemental analysis demonstrate the improvement of interfacial strength and toughness by chemical treatment of CFs, suggesting the high potential of surface modification of inorganic fillers for polymer composites with tunable properties for different applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Materials Science, Multidisciplinary
Yijie Jiang, Md Nurul Islam, Rui He, Xiaozhou Huang, Peng-Fei Cao, Rigoberto C. Advincula, Narendra Dahotre, Pei Dong, H. Felix Wu, Wonbong Choi
Summary: This article reviews the state-of-the-art 3D printing methods in the manufacturing of sensors and summarizes the performance of 3D printed sensing materials and devices. Special attention is given to emerging multimaterial printing and 4D printing technologies, which will enable the fabrication of new generation structures with multifunctionalities. The article also compares the performance of 3D printed sensors with traditionally manufactured sensors. The viewpoints on the future development of 3D printed sensors are provided.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Coatings & Films
I. A. Ojo, E. Hathaway, R. R. Gonzalez, P. R. Adhikari, V. Sathish, B. Kunam, Y. Khalid, J. Cui, W. Choi, J. M. Perez
Summary: We studied the defects in exfoliated graphene on SiO2 produced by electron irradiation and found that graphene exhibits a two-stage amorphization trajectory as the dosage increases. In the first stage, the D-peak height to the G-peak height ratio increases as new defects are formed, and in the second stage, the ratio decreases as defects cover most of the sample. The width of Raman peaks also increases in the second stage, but the values are smaller than those reported for amorphous graphene produced by Ar ion bombardment.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Nanoscience & Nanotechnology
Eunho Lee, Junyoung Kim, Juhong Park, Jinwoo Hwang, Hyoik Jang, Kilwon Cho, Wonbong Choi
Summary: Neuromorphic computing based on two-dimensional transition-metal dichalcogenides (2D TMDs) has attracted significant attention. This study presents sulfur-defect-assisted MoS2 artificial synaptic devices with excellent synapse and remarkable nonvolatile memory characteristics. The working mechanism of the synaptic device, based on the precise defect engineering of sputtered MoS2, is systematically analyzed. This provides a procedural guideline for the design of practical 2D TMD-based neuromorphic computing.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Pashupati R. Adhikari, Eunji Lee, Lee Smith, Jeongyong Kim, Sheldon Shi, Wonbong Choi
Summary: The effect of morphological variation in 3D carbon nanotubes as a sulfur host material in lithium-sulfur batteries was investigated. The results show that high surface area and porosity are crucial parameters for efficient sulfur host materials in 3D carbon nanotubes.
Article
Materials Science, Multidisciplinary
Amoko Stephen, Sanket Bhoyate, Pengfei Cao, Rigoberto Advincula, Narendra Dahotre, Yijie Jiang, Wonbong Choi
Summary: Three-dimensional (3D) printed batteries are gaining attention for their enhanced performance. Zinc ion batteries (ZIBs) are a promising energy storage system due to their high safety, low cost, and high volumetric capacity. However, the rapid evaporation of zinc limits their 3D printability. In this study, researchers developed a unique 3D-printed flexible ZIB with an engineered surface area of the zinc anode using direct ink writing. The 3D-printed zinc anodes effectively suppress dendrite growth and provide high zinc-ion diffusion, resulting in a high specific capacity and long-term cyclic stability.
MRS COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Sanket Bhoyate, Junyoung Kim, Eunho Lee, Bumsu Park, Eunji Lee, Juhong Park, Sang Ho Oh, Jeongyong Kim, Wonbong Choi
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
Review
Chemistry, Physical
Eunho Cha, Mumukshu Patel, Sanket Bhoyate, Vish Prasad, Wonbong Choi
NANOSCALE HORIZONS
(2020)
Proceedings Paper
Nanoscience & Nanotechnology
Chowdhury Al-Amin, Raju Sinha, Nezih Pala, Wonbong Choi
MICRO- AND NANOTECHNOLOGY SENSORS, SYSTEMS, AND APPLICATIONS VI
(2014)
Article
Chemistry, Physical
Jie Sheng, Jingshan He, Dun Ma, Yuanbo Wang, Wu Shao, Tian Ding, Ronghao Cen, Jingwen He, Zhihao Deng, Wenjun Wu
Summary: This study presents an innovative approach to improve the photovoltaic conversion characteristics and stability of perovskite solar cells through carbon electrode interface modification. By in-situ polymerization and carbonization on the surface of nano-graphite, a dendritic structure carbon electrode is formed, reducing the work function and aligning the energy levels with perovskite. This leads to improved charge and hole collection efficiency, resulting in increased photovoltaic conversion efficiency. Furthermore, the modified carbon electrode-based perovskite solar cells exhibit exceptional stability, maintaining high efficiency even without encapsulation.
Article
Chemistry, Physical
Guodong Shi, Jian Song, Xiaoxiao Tian, Tongtong Liu, Zhanjun Wu
Summary: This study demonstrates the improvement of mechanical properties and reduction of coefficient of thermal expansion (CTE) in graphene oxide (GO)/epoxy (EP) nanocomposites by enhancing the interface between GO and EP through functionalization and incorporating rigid-flexible interphases. The results reveal that the SiO2-PEA-GO hybrid exhibits better strengthening and toughening effects, as well as lower CTE, compared to the PEA-GO hybrid due to the presence of rigid-flexible interfaces with higher bonding strength and better energy dissipation mechanisms. Additionally, the nanocomposites with longer polyetheramine (PEA) molecules in the rigid-flexible interphases demonstrate higher strength and toughness, while maintaining a lower CTE. This work provides a promising strategy for constructing adjustable flexible-rigid interfacial structures and offers potential in developing GO/EP nanocomposites with high mechanical properties and low CTE.
Article
Chemistry, Physical
Rafal Janus, Sebastian Jarczewski, Jacek Jagiello, Piotr Natkanski, Mariusz Wadrzyk, Marek Lewandowski, Marek Michalik, Piotr Kustrowski
Summary: In this study, a facile procedure for the synthesis of CMK-1 and CMK-2 carbon replicas was developed. The method utilizes basic laboratory equipment and a renewable carbon source, and operates under mild conditions. The resulting carbon mesostructures exhibit exquisite replication fidelity and structural homogeneity, making them suitable for applications in various fields.
Article
Chemistry, Physical
Anqi Wang, Connor J. MacRobbie, Alex Baranovsky, Jean-Pierre Hickey, John Z. Wen
Summary: In this study, a novel polymer-free nanothermite aerogel with a wide range of nanoparticle loading was fabricated via a new additive manufacturing process. The SEM images showed a unique porous structure formed by extra thin rGO sheets, wrapping individual nanothermite clusters. The DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen.
Article
Chemistry, Physical
Wanze Wu, Misheng Zhao, Shiwei Miao, Xiaoyan Li, Yongzhong Wu, Xiao Gong, Hangxiang Wang
Summary: Superhydrophobic solar-driven interfacial evaporator is an energy-efficient technology for seawater desalination, which is easily fabricated using robust photothermal superhydrophobic coating and substrate. The created bifunctional coating on the melamine sponge substrate shows stable and highly efficient photothermal and superhydrophobic performance for seawater desalination. This superhydrophobic solar-driven interfacial evaporator is expected to have wide applications in seawater desalination.
Article
Chemistry, Physical
Zichen Xiang, Zhi Song, Tiansheng Wang, Menghang Feng, Yijing Zhao, Qitu Zhang, Yi Hou, Lixi Wang
Summary: This study presents a co-electrospinning synthesis strategy to fabricate lightweight and porous Co@C composite nanofibres with wideband microwave attenuation capacity. The addition of MOF-derived Co additives enhances the low-frequency absorption performance.
Article
Chemistry, Physical
J. Snow, C. Olson, E. Torres, K. Shirley, E. Cazalas
Summary: This study investigates the use of a perovskite-based graphene field effect transistor (P-GFET) device for X-ray detection. The sensitivity and responsivity of the device were found to be influenced by factors such as X-ray tube voltage, current, and source-drain voltage. Simulation experiments were conducted to determine the dose rate and energy incident on the device during irradiation.
Article
Chemistry, Physical
Zuzana Jankovska, Lenka Matejova, Jonas Tokarsky, Pavlina Peikertova, Milan Dopita, Karolina Gorzolkova, Dominika Habermannova, Michal Vastyl, Jakub Belik
Summary: This study provides new insights into microwave-assisted pyrolysis of scrap tyres, demonstrating that it can produce microporous carbon black with potential application in xylene adsorption. Compared to conventional pyrolysis, microwave pyrolysis requires less time and energy while maintaining similar adsorption capacity.
Article
Chemistry, Physical
Max Bommert, Bruno Schuler, Carlo A. Pignedoli, Roland Widmer, Oliver Groning
Summary: A detailed understanding of the interaction between molecules and two-dimensional materials is crucial for incorporating functional molecular films into next-generation 2D material-organic hybrid devices. This study compares the energy level alignment of different-sized fullerenes on a Moire superstructure and finds that C-84 fullerenes can be either neutral or negatively charged depending on slight variations of the electrostatic potential. This discovery suggests a new path to achieve ambipolar charge transfer without overcoming the electronic gap of fullerenes.
Article
Chemistry, Physical
Yuanjing Cheng, Xianxian Sun, Ye Yuan, Shuang Yang, Yuanhao Ning, Dan Wang, Weilong Yin, Yibin Li
Summary: The dual-structure aerogel (GS) consisting of flexible silica fibers and graphene honeycomb structures exhibits excellent resilience, flexibility, and reliability. It also shows remarkable wave absorbing performance, making it an ideal candidate for microwave absorption applications such as flexible electronics and aerospace.
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Chemistry, Physical
Mengdi Wang, Sanyin Qu, Yanling Chen, Qin Yao, Lidong Chen
Summary: The improved thermoelectric properties of conducting polymers are achieved by selectively capturing single-walled carbon nanotubes (SWNTs) in a conducting polymer film, leading to increased carrier mobility and reduced thermal conductivity. The resulting composite film exhibits significantly higher electrical conductivity and lower thermal conductivity compared to films with a mixture of SWNTs. This work provides a convenient and efficient method to enhance the thermoelectric properties of conducting polymers.
Review
Chemistry, Physical
Heng Wei, Weihua Li, Kareem Bachagha
Summary: This article reviews the research progress of carbon nanotube-based microwave absorbing materials (MAMs) in recent years, covering the fundamental theory, design strategies, synthesis methods, and future development directions.
Article
Chemistry, Physical
Chenguang Shi, Junlong Huang, Zongheng Cen, Tan Yi, Shaohong Liu, Ruowen Fu
Summary: This study developed a high-performance Li metal host material, which achieved dendrite-free Li deposition with a low nucleation overpotential and high Coulombic efficiencies through the combination of Ti3C2-g-PV4P sheets and Ag nanoparticles. The full cells assembled with the Li@host anode and LiFePO4 cathode exhibited high discharge capacity and excellent cycling stability, demonstrating a perspective design for future energy storage devices.
Article
Chemistry, Physical
Tomotaro Mae, Kentaro Kaneko, Hiroki Sakurai, Suguru Noda
Summary: A new partial prelithiation method for SiO/C-CNT electrodes was developed, which showed reduced irreversible capacity and achieved high energy densities with good reversibility. The method allows for precise control of the degree of prelithiation and is applicable to various chemistries.