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Understanding the scattering mechanism of single-walled carbon nanotube based gas sensors |
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| Authors: | Jun Zhong Jinghua Guo Jau-Wern Chiou Jiong Li Way-Faung Pong Yi Luo |
| Affiliation: | a Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China b Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA c Theoretical Chemistry, Royal Institute of Technology, Alba Nova, S-106 91 Stockholm, Sweden d Department of Physics, Tamkang University, Tamsui, Taiwan 251, China e National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China f Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China |
| Abstract: | In the interaction between gas molecules with single-walled carbon nanotube (SWCNT) we show that as a result of collisions the gas scattering contributes with an important background signal and should be considered in SWCNT-based gas sensors. Experimental evidence of the collision-induced tube wall deformation is demonstrated using in situ X-ray absorption near-edge structure spectroscopy. Results support the occurrence of the scattering process and show how gas collisions may affect the electronic structure of SWCNTs. |
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