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Chinese Journal of Aeronautics 2021年第2期34卷 620-628页

作者： Xianglin ZHANG Jikui ZHANG Xiaoquan CHENG Wenjun HUANG School of Aeronautic Science and Engineering Beihang UniversityBejjing 100191China Research Institute of Frontier Science Beihang UniversityBejjing 100191China AVIC China Helicopter Research and Development Institute Jingdezhen 333001China

A kind of interlaminar film with carbon nanotubes inserted into polyether ketone with cardo was used for lightning strike protection of composite laminates. The distribution of the interlaminar film was investigated by experimental and numerical methods. Artificial lightning strike tests were conducted for 12-film carbon nanotube and traditional surface silver coating protected specimens. Then corresponding finite element models(FEMs) were established to analyze the lightning strike effect and validated by the experimental results. Based on the FEMs, the number, distribution and thickness of interlaminar film were investigated in order to obtain equivalent protection effect with the traditional surface silver coating. The results show that only the first two layers were damaged for the surface silver coating protected specimen, while 5 layers were ablated for the 12-film protected specimen. Lightning strike damage area of the laminate protected with 5-film carbon nanotube is almost the same as that of the laminate protected with 12-film carbon nanotube. Compared with traditional surface silver coating protection, one film protection with thickness of 360 lm can make the laminate to obtain equivalent damage depth, 54.8% smaller damage area and 58% less additional weight. And reparability of the laminate is better than that of the laminate protected with 5 interlaminar films.

关键词： carbon nanotube Composite laminates Damage Interlaminar film Lightning strike protection

carbon nanotube-based CMOS transistors and integrated circuits

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Science China(Information Sciences) 2021年第10期64卷 136-151页

作者： Yunong XIE Zhiyong ZHANG Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics and Center for carbon-based Electronics Department of Electronics Peking University Academy for Advanced Interdisciplinary Studies Peking University

Over the last sixty years, the scaling of silicon-based complementary metal-oxide-semiconductor(CMOS) field-effect transistors(FETs) have promoted the rapid development of microelectronic ***, the development of Si CMOS technology is currently subject to serious challenges from various aspects such as physics limit, cost, and power consumption, and is becoming increasingly difficult. Material innovation is exerting an ever-greater role in the integrated circuit design. By looking for thinner semiconductor materials with higher mobility as the active layer to construct smaller and higher-performance transistors, it is possible to further stimulate transistors and integrated circuits on performance, density,power dissipation, and functions. In 1991, Iijima discovered carbon nanotubes(CNTs). Due to its excellent electrical properties and intrinsic nano-scale size, CNT has been considered by academia and industry to have great potential to replace silicon materials in the future for the extremely scaled technology nodes or novel electronic applications. This paper reviews the latest advancements in CNT-based electronics ***, the challenges and pathways for nanotube transistors to transition into commercial applications are discussed.

关键词： carbon nanotube transistor integrated circuit scaling nanoelectronics

carbon nanotube Transistor with Short-Term Memory

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Tsinghua Science and Technology 2016年第4期21卷 442-448页

作者： Changqing Yin Yuxing Li Jiabin Wang Xuefeng Wang Yi Yang Tian-Ling Ren Institute of Microelectronics Tsinghua University Institute of Microelectronics and Tsinghua National Laboratory for Information Science and Technology Tsinghua University

Short-Term Memory （STM） is a primary capability of the human brain. Humans use STM to remember a small amount of information, like someone＇s phone number, for a short period of time. Usually the duration of STM is less than 1 minute. Synapses, the connections between neurons, are of vital importance to memory in biological brains. For mimicking the memory function of synapses, carbon nanotube （CNT） networks based thin- film transistors with Electric Double Layers （EDL） at the dielectric/channel interface were researched in this work. A response characteristic of pre-synaptic potential pulses on the gate electrode of this CNT synaptic transistor was shown remarkably similar to Excitatory Post-Synaptic Current （EPSC） of biological synapses. Also a multi-level modulatable STM of CNT synaptic transistors was investigated. Post-synaptic current was shown with tunable peak values, on-off ratio, and relaxation time.

关键词： carbon nanotube thin-film transistor synapse excitatory postsynaptic current short-term memory

carbon nanotube and conducting polymer composites for supercapacitors

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Progress in Natural Science:Materials International 2008年第7期18卷 777-788页

作者： Daniel Jewell George Z. Chen School of Chemical and Environmental and Mining Engineering University of Nottingham University ParkNottingham NG7 2RD UK

Composites of carbon nanotubes and conducting polymers can be prepared via chemical synthesis, electrochemical deposition on pre- formed carbon nanotube electrodes, or by electrochemical co-deposition. The composites combine the large pseudocapacitance of the conducting polymers with the fast charging/discharging double-layer capacitance and excellent mechanical properties of the carbon nanotubes. The electrochemically co-deposited composites are the most homogeneous and show an unusual interaction between the polymer and nanotubes, giving rise to a strengthened electron delocalisation and conjugation along the polymer chains. As a result they exhibit excellent electrochemical charge storage properties and fast charge/discharge switching, making them promising electrode mate- rials for high power supercapacitors.

关键词： Supercapacitor carbon nanotube Conducting polymer

Coherent field emission from a multi-walled carbon nanotube with two open-ended branches

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Chinese Physics B 2009年第8期18卷 3517-3522页

作者：柏鑫张耿民王鸣生张兆祥于洁赵兴钰郭等柱薛增泉 Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics Peking University

Interference fringes are obtained in a field-emission microscopy （FEM） study of a multi-walled carbon nanotube （MWCNT） with two open-ended branches. The FEM pattern, which is composed of three parallel streaks, can be interpreted by using classical Young＇s double-slit interference with the ends of the two MWCNT branches treated as two secondary sources of the electron wave. The origin of the coherency of the electron beams from the two branches is discussed on the basis of the quantitative analysis of the FEM pattern. The result suggests a new approach to obtaining a coherent electron source.

关键词： interference field emission carbon nanotube

Nitrogen-,phosphorus-doped carbon-carbon nanotube CoP dodecahedra by controlling zinc content for high-performance electrocatalytic oxygen evolution

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Rare Metals 2020年第6期39卷 680-687页

作者： Xia-Xia Li Pei-Yao Zhu Qing Li Yu-Xia Xu Yan Zhao Huan Pang School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009China Guangling College Yangzhou UniversityYangzhou 225000China College of Chemistry and Materials Science Sichuan Normal UniversityChengdu 610068China

Here,N-and P-doped carbon-carbon nanotube CoP(NPC-CNTs-CoP)nanoparticles dodecahedra are achieved by multistep calcination of the Zn-doped zeolitic imidazolate framework ZIF-67 precursor(ZnCo-ZIF).In the structures,the presence of N and P atoms,abundant CNTs and the CoP nanoparticles can enhance electrochemical activity and promote the structural stability of *** the temperature increases,the Zn contents gradually reduce to zero,which provides more active sites for electrochemical ***,the high specific surface area and microporous behavior of NPC-CNTsCoP-9 make it excellent in electrocatalytic ***-CoP-9 shows a low overpotential of 224 mV at10 mA·cm^-2 in 1.0 mol·L^-1 KOH *** strategy of zeolitic imidazole framework-derived transition metal phosphides will provide a new sight for developing energy conversion materials.

关键词： Nitrogen Phosphorus carbon carbon nanotube CoP Oxygen evolution

Graphene-carbon nanotube hybrid films for high- performance flexible photodetectors

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Nano Research 2017年第6期10卷 1880-1887页

作者： Yujie Liu Yuanda Liu Shuchao Qin Yongbing Xu Rong Zhang Fengqiu Wang School of Electronic Science and Engineering and Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093 China

Graphene is being actively explored as a candidate material for flexible and stretchable devices. However, the development of graphene-based flexible photonic devices, i.e. photodetectors, is hindered by the low absorbance of the single layer of carbon atoms. Recently, van der Waals bonded carbon nanotube and graphene hybrid films have demonstrated excellent photoresponsivity, and the use of vein-like carbon nanotube networks resulted in significantly higher mechanical strength. Here, we report for the first time, a flexible photodetector with a high photoresponsivity of - 51 A/W and a fast response time of - 40 ms over the visible range, revealing the unique potential of this emerging all-carbon hybrid films for flexible devices. In addition, the device exhibits good robustness against repetitive bending, suggesting its applicability in large-area matrix-array flexible photodetectors.

关键词： graphene carbon nanotube van der Waalsheterostructures flexible photodetector

Energetics and electronic structure of a single copper atomic chain wrapped in a carbon nanotube:a first-principles study

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Chinese Physics B 2009年第12期18卷 5468-5473页

作者：张建民杜秀娟王素芳徐可为 College of Physics and Information Technology Shaanxi Normal University State Key Laboratory for Mechanical Behaviour of Materials Xi'an Jiaotong University

In the generalized gradient approximation, the energy and electronic structure are investigated for a single copper atomic chain wrapped in （4, 4）, （5, 5） and （6, 6） armchair carbon nanotubes by using the first-principles projector-augmented wave potential within the framework of density functional theory. The results show that the （4, 4） and （5, 5） tubes are too narrow to wrap a Cu chain, but the （6, 6） tube is nearly ideal to wrap a Cu chain on its centre axis. Wider tubes are anticipated to wrap more than one Cu chain spontaneously with forces amounting to a fraction of a nanonewton. Although the tube-chain interaction decreases with the increase of the tube diameter of （4, 4）, （5, 5） and （6, 6） successively, the charge density of the Cu@（6, 6） combined system still does not show complete superposition of that of the pristine （6, 6） tube and Cu chain. Successively reducing the restrictions of （4, 4）, （5, 5） and （6, 6） tubes on the Cu chain leads to a reduction in shift of the highest peak of the Cu chain towards lower energies, that is from -0.5177 eV of the isolated Cu chain to -1.36785 eV, -0.668 eV and -0.588 eV for the Cu@（4, 4）, Cu@（5, 5） and Cu@（6, 6） systems, respectively. In reverse, the strong metallic character of the Cu chain also enhances the metallic character of the combined systems so that the broader pseudogaps of the pristine carbon nanotubes around the Fermi level change into the narrow pseudogaps of the combined systems.

关键词： copper atomic chain carbon nanotube electronic structures first-principle

Terahertz radiation from armchair carbon nanotube dipole antenna

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Chinese Physics B 2009年第5期18卷 1801-1806页

作者：王玥吴群贺训军张少卿庄蕾蕾 School of Electronics and Information Technology Harbin Institute of Technology Department of Electrical Science and Technology Harbin University of Science and Technology

This paper investigates the electromagnetic radiation characteristics of a metallic, large aspect ratio single walled carbon nanotube antenna in the terahertz frequency region below 12.5 THz. The key features of terahertz pulse have been revealed on the carbon nanotube antenna in comparison with conventional photoconductive switching. The terahertz waveforms, radiation power and their field distributions have been evaluated and are analysed. The Fourier transformed spectra over the whole frequency range demonstrate that the carbon nanotube antenna can be used as radiation source for broadband terahertz applications.

关键词： terahertz carbon nanotube antenna

On vibration analysis of functionally graded carbon nanotube reinforced magneto-electro-elastic plates with different electro-magnetic conditions using higher order finite element methods

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Defence Technology（防务技术） 2021年第1期17卷 287-303页

作者： M.Vinyas D.Harursampath S.C.Kattimani Nonlinear Multifunctional Composites Analysis and Design(NMCAD)Laboratory Department of Aerospace EngineeringIndian Institute of ScienceBangalore560012India Department of Mechanical Engineering National Institute of Technology KarnatakaSurathkal575025India

This article deals with evaluating the frequency response of functionally graded carbon nanotube reinforced magneto-electro-elastic(FG-CNTMEE)plates subjected to open and closed electro-magnetic circuit *** this regard finite element formulation has been *** plate kinematics adjudged via higher order shear deformation theory(HSDT)is considered for *** equations of motion are obtained with the help of Hamilton’s principle and solved using condensation *** is found that the convergence and accuracy of the present FE formulation is very good to address the vibration problem of FG-CNTMEE *** the first time,frequency response analysis of FG-CNTMEE plates considering the effect of various circuit conditions associated with parameters such as CNT distributions,volume fraction,skew angle,aspect ratio,length-to-thickness ratio and coupling fields has been carried *** results of this article can serve as benchmark for future development and analysis of smart structures.

关键词： carbon nanotube Magneto-electro-elastic Higher order shear deformation theory Coupled frequency Electro-magnetic conditions