CNT array-induced nanobubble assembly,nanodisk fabrication and enhanced spectral detection of CNT bundle density  

作　　者：Zhiyuan Xia Ziming Ye Bo Zhao Tingsong Zhang Qi Wang Kun Chen Meng Li Xiaobing Kong Yu-Qing Zheng Enzheng Shi Yuanyuan Shang Anyuan Cao 

机构地区：[1]School of Materials Science and Engineering,Peking University,Beijing 100871,China [2]School of Integrated Circuits,Peking University,Beijing 100871,China [3]School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450001,China [4]School of Engineering,Westlake University,Hangzhou 310024,China

出　　处：《Nano Research》2024年第8期7737-7745,共9页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51872267);the Natural Science Foundation of Beijing(No.2212028);the Program for Science&Technology Innovation Talents in Universities of Henan Province(No.21HASTIT017).

摘　　要：Alignment,functionalization and detection of carbon nanotube(CNT)bundles are vital processes for utilizing this onedimensional nanomaterial in electronics.Here,we report a polymer-assisted wet shearing method to acquire super-aligned craterpatterned CNT arrays by nanobubble(NB)self-assembly with a"migrate and aggregation"mechanism and use craters to controllably mold even-sized nanodisks periodically along CNT bundles with tunable densities.This green,low-cost method can be extended to diverse substrates and fabricate different nanodisks.As an example,the Ag-nanodisk-patterned CNT arrays are utilized as substrates of surface-enhanced Raman scattering(SERS)for rhodamine 6G(R6G)and methylene blue(MB)in which a linear correlation is found between the SERS intensity and the CNT bundle density due to the periodic distribution of hot spots,enabling a spectral detection of CNT bundles and their densities by conventional dye molecules.Distinguishing from routine morphological characterization,this spectral method possesses an enhanced accuracy and a detection range of 0.1–2μm^(–1),showing its uniqueness in the detection of CNT bundle density since the intensity of traditional spectral merely relates to the quantity of CNTs,exhibiting its potential in future CNT-bundle-based electronics.

关 键 词：CNT arrays NANOBUBBLES SELF-ASSEMBLY NANODISKS surface-enhanced Raman scattering(SERS) 

分 类 号：TB383[一般工业技术—材料科学与工程]