Highly sensitive NO(2) sensor array based on undecorated single-walled carbon nanotube monolayer junctions

作者：Maeng Sunglyul^*; Moon Seungeon; Kim Sanghyeob; Lee Hong Yeol; Park So Jeong; Kwak Jun Hyuk; Park Kang Ho; Park Jonghyurk; Choi Youngjin; Udrea Florin; Milne William I; Lee Byung Yang; Lee Minbaek; Hong Seunghun

来源：Applied Physics Letters, 2008, 93(11): 113111.

DOI：10.1063/1.2982428

Using the surface-programmed assembly technique, we have fabricated a uniform array of NO(2) sensors based on undecorated single-walled carbon nanotube (SWNT) monolayer junctions. The sensitivity of the SWNT monolayer network-based sensors to NO(2) gas was investigated at room temperature. We have found that the response of the gas sensors is inversely proportional to the initial conductance of the SWNT network. This behavior is different from conventional gas sensors based on uniform films, and it may be critical for the calibration of sensors in practical applications. An analytical model based on standard percolation theory is proposed to explain this behavior.

• 出版日期2008-9-15