title: Improving nanowire sensing capability by electrical field alignment of surface probing molecules.
abstract: We argue that the structure ordering of self-assembled probing molecular monolayers is essential for the reliability and sensitivity of nanowire-based field-effect sensors because it can promote the efficiency for molecular interactions as well as strengthen the molecular dipole field experienced by the nanowires. In the case of monolayers, we showed that structure ordering could be improved by means of electrical field alignment. This technique was then employed to align multilayer complexes for nanowire sensing applications. The sensitivity we achieved for detection of hybridization between 15-base single-strand DNA molecules is 0.1 fM and for alcohol sensors is 0.5 ppm. The reliability was confirmed by repeated tests on chips that contain multiple nanowire sensors.
authors: Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, 10608, Taiwan.
authors: Chia-Jung
authors: CJ
authors: Chu
authors: Chia-Sen
authors: CS
authors: Yeh
authors: Chun-Kai
authors: CK
authors: Liao
authors: Li-Chu
authors: LC
authors: Tsai
authors: Chun-Ming
authors: CM
authors: Huang
authors: Hung-Yi
authors: HY
authors: Lin
authors: Jing-Jong
authors: JJ
authors: Shyue
authors: Yit-Tsong
authors: YT
authors: Chen
authors: Chii-Dong
authors: CD
authors: Chen
mesh_terms: D004574:Electromagnetic Fields; D053770:Nanowires; D013499:Surface Properties