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Enhanced etching of silicon dioxide guided by carbon nanotubes in HF solution |
Zhao Hua-Bo(赵华波)a), Ying Alex Yi-Qun(应轶群)a), Yan Feng(严峰)a), Wei Qin-Qin(魏芹芹)c), Fu Yun-Yi(傅云义)c), Zhang Yan(张岩)b), Li Yan(李彦)b), Wei Zi-Jun(魏子钧)c), and Zhang Zhao-Hui(张朝晖)a)† |
a State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China; b Key Laboratory for Physics and Chemistry of Nanodevices, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China; c Department of Microelectronics, Peking University, Beijing 100871, China |
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Abstract This paper describes a new method to create nanoscale SiO2 pits or channels using single-walled carbon nanotubes (SWNTs) in an HF solution at room temperature within a few seconds. Using aligned SWNT arrays, a pattern of nanoscale SiO2 channels can be prepared. The nanoscale SiO2 patterns can also be created on the surface of three-dimensional (3D) SiO2 substrate and even the nanoscale trenches can be constructed with arbitrary shapes. A possible mechanism for this enhanced etching of SiO2 has been qualitatively analysed using defects in SWNTs, combined with H3O+ electric double layers around SWNTs in an HF solution.
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Received: 11 May 2011
Revised: 09 June 2011
Accepted manuscript online:
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PACS:
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81.16.Rf
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(Micro- and nanoscale pattern formation)
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82.45.Jn
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(Surface structure, reactivity and catalysis)
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81.65.Cf
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(Surface cleaning, etching, patterning)
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82.37.Gk
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(STM and AFM manipulations of a single molecule)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 90406007, 61076069, 60776053, and 10434010) and the National Basic Research Program of China (Grant No. 2007CB936800). |
Cite this article:
Zhao Hua-Bo(赵华波), Ying Alex Yi-Qun(应轶群), Yan Feng(严峰), Wei Qin-Qin(魏芹芹), Fu Yun-Yi(傅云义), Zhang Yan(张岩), Li Yan(李彦), Wei Zi-Jun(魏子钧), and Zhang Zhao-Hui(张朝晖) Enhanced etching of silicon dioxide guided by carbon nanotubes in HF solution 2011 Chin. Phys. B 20 108103
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