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| 1 | Diameter-controlled growth of aligned single-walled carbon nanotubes on quartz using molecular nanoclusters as catalyst precursors显示文摘Molecular nanoclusters containing Fe and Mo atoms have been used as catalyst precursors for the growth of single-walled carbon nanotubes (SWNTs) on stable temperature (ST)-cut quartz substrates by chemical vapor deposition. Attribute to the uniform catalyst nanoparticles and the confinement effect of the crystalline substrates, well-aligned SWNTs with narrow diameter distribution have been synthesized. Atomic force microscopy measurements show that the mean diameter of the nanotubes obtained by thermal decomposition of ethanol at 900°C is 0.76 ± 0.16 nm, which is the smallest among all reported results for aligned SWNTs. The mean diameter of the nanotubes increases with growth temperature. In addition to using identical nanoclusters as the catalyst precursors, the avoidance of annealing treatment of catalyst precursors is also a key point for obtaining SWNTs with controlled diameters. Using these identical nanoclusters as catalyst precursors and carefully tuning the growth parameters make us closer to the ultimate goal of controlling the chirality of SWNTs. | PENG Fei LUO Da SUN Hao WANG JinYong YANG Feng LI RuoMing YANG Juan LI Yan | 2013 | Chinese Science Bulletin2013，58，4： | 3 |
| 2 | Reliability tests and improvements for Sc-contacted n-type carbon nanotube transistors显示文摘钪(Sc ) 联系了 n 类型碳 nanotube (CNT ) 有背和最高门的结构的完成地的晶体管(联邦货物税) 被制作了,并且他们在空中的稳定性被调查。氧和水分子可以影响 nanotube 隧道和 Sc/nanotube 接触,这被显示出,导致败坏的接触质量和设备性能。与 n 类型碳 nanotube 联邦货物税的不稳定性联系的这些否定效果能通过使钝化被消除由 atomic-layer-deposition 的薄层的 CNT 设备成年 Al2O3 绝缘体。在钝化以后, n 类型碳 nanotube 联邦货物税被显示甚至在被测试并且暴露了通风超过 146 天,然后光滑得多的输出以后展出优秀空气稳定性特征和减少的门电压从 1 ~ 0.1 V 的磁滞现象被表明什么时候与没有钝化的设备相比。持续电源开著测试也为至少 10 h 在大门应力和在空中当前的高排水管下面在使钝化的 CNT 联邦货物税上被执行,揭示空设备降级有时平的改进性能。这些结果答应那 CNT 设备在空中是可靠的并且可以在实际应用被使用使钝化。 | Shibo Liang Zhiyong Zhang Tian Pei Ruoming Li Yan Li Lianmao Peng | 2013 | Nano Research2013，6，7： | 3 |
| 3 | A multicomponent micro-Doppler signal decomposition and parameter estimation method for target recognition显示文摘Dear editor,The micro-Doppler modulation caused by the rotors on an unmanned aerial vehicle(TJAV)can be employed to recognize the UAV.However,several rotors on a UAV,as well as multiple targets at the same scene,lead to a multicomponent micro-Doppler signal in the radar echo.Conventional signal decomposition is an important method for extraction of the features from micro-Doppler signals [1].although it is incapable of separating characteristic curves that are overlapping [2] in the lime-frequency(TF)plane in the ease of multicomponent,micro-motion,which can lead to the poor precision of parameter estimation. | Chen SONG Yirong WU Liangjiang ZHOU Ruoming LI Jiefang YANG Wei LIANG Chibiao DING | 2019 | Science China(Information Sciences)2019，62，2： | 2 |
| 4 | Preparation of horizontally aligned single-walled carbon nanotubes with floating catalyst显示文摘A strategy to prepare horizontally aligned single-walled carbon nanotubes(SWNTs) at moderate temperatures(≤600 ℃) were developed.Using ferocene as the catalyst precursor,Fe nanoparticles are formed in the gaseous phase and catalyze the nucleation and growth of SWNTs in situ.Then the resultant SWNTs are deposited onto the substrates downstream and aligned by the surface lattice of the ST-cut single crystal quartz.The preparation of SWNT arrays at moderate temperatures is important for combining the tube growth with device fabrication. | Rongli Cui Xiulan Zhao Ruoming Li Yu Liu Da Luo Feng Yang Yan Li | 2017 | Science China Chemistry2017，60，4： | 2 |
| 5 | Robust local com- munity detection: on free rider effect and its elimination显示文摘 | Wu Yubao Jin Ruoming Li Jing | 2015 | Proceedings of the VLDB Endowment2015，8，7： | 1 |
| 6 | Single-walled carbon nanotube based SERS substrate with single molecule sensitivity显示文摘In single molecule study,surface-enhanced Raman scattering(SERS)has the advantage of specifically providing structural information of the molecules targeted.The main challenge in single molecule SERS is developing reusable plasmonic substrates that ensures single molecule sensitivity and acquires intrinsic information of molecules.Here,we proposed a strategy to utilize single-walled carbon nanotubes(SWNTs)to construct SERS substrates.Employing ultrasonic spray pyrolysis,we prepared in situ polyhedral gold nanocrystals closely spaced and attached to nanotubes,ensuring valid hot spots formed along the tube-walls.With such SERS substrates,we proved the single molecule detection by the statistical analysis based on the natural abundance of isotopes.Since SWNTs provide non-chemical bonding adsorption sites,our SERS substrates are easily reusable and have a unique advantage of preserving the intrinsic property of the molecules detected.Using SWNTs to build SERS substrates may become a powerful general strategy in various static and dynamic studies of single molecules. | Chenmaya Xia Daqi Zhang Henan Li Sheng Li Haoming Liu Li Ding Xiyan Liu Min Lyu Ruoming Li Juan Yang Yan Li | 2022 | Nano Research2022，15，1： | 0 |
| 7 | Selective growth of semiconducting single-walled carbon nanotubes solely from carbon monoxide显示文摘The selective growth of semiconducting single-walled carbon nanotubes(s-SWCNTs)is of great importance in many high-end applications represented by nanoelectronics.Here,we developed a general approach to grow horizontally aligned s-SWCNT arrays on stable temperature(ST)-cut quartz with bimetallic catalysts using carbon monoxide(CO)as both catalyst reductant and single component carbon feedstock under atmospheric pressure.The disproportionation of CO produces not only carbon species for SWCNT growth but also CO_(2),which could act as an in-situ etchant to remove both amorphous carbon and metallic tubes.The employment of bimetallic catalyst and quartz substrate facilitates the selective etching by narrowing the diameter distribution of as-grown SWCNT arrays.At the optimized conditions,we realized the selective growth of horizontally aligned s-SWCNT arrays with the content above 97%using CoCu catalysts,confirmed by Raman characterization and electrical measurements of the fabricated field effect transistor devices.This CO-based process in selective growth of s-SWCNTs has demonstrated its feasibility and universality by the broad growth window and applicability for other bimetallic catalysts,such as FeCu and CoMn.It possesses a practical potential in obtaining semiconducting channel materials for the scalable fabrication of CNT-based devices. | Xue Zhao Ningfei Gao Zeyao Zhang Qidong Liu Jian Sheng Yijie Hu Ruoming Li Haitao Xu Lianmao Peng Yan Li | 2023 | Nano Research2023，16，11： | 0 |
| 8 | Radial deformation of single-walled carbon nanotubes on quartz substrates and the resultant anomalous diameter-dependent reaction selectivity显示文摘Owing to the unique conjugated structure, the chemical-reaction selectivity of single-walled carbon nanotubes (SWNTs) has attracted great attention. By utilizing the radial deformation of SWNTs caused by the strong interactions with the quartz lattice, we achieve an anomalous diameter-dependent reaction selectivity of quartz lattice-oriented SWNTs in treatment with iodine vapor; this is distinctly different from the widely reported and well accepted higher reaction activity in small-diameter tubes compared to large-diameter tubes. The radial deformation of SWNTs on quartz substrate is verified by detailed Raman spectroscopy and mappings in both G-band and radial breathing mode. Due to the strong interaction between SWNTs and the quartz lattice, large-diameter tubes present a larger degree of radial deformation and more delocalized partial electrons are distributed at certain sidewall sites with high local curvature. It is thus easier for the carbon--carbon bonds at these high-curvature sites on large-diameter tubes to break down during reaction. This anomalous reaction activity offers a novel approach for selective removal of small-band^aD large-diameter tubes. | Juan Yang Yu Liu Daqi Zhang Xiao Wang Ruoming Li Yan Li | 2015 | Nano Research2015，8，9： | 0 |
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