Nano Archive

Control and detection of organosilane polarization on nanowire field-effect transistors

Lin, M. C. and Chu, C. J. and Tsai, L. C. and Lin, H. Y. and Wu, C. S. and Wu, Y. P. and Wu, Y. N. and Shieh, D. B. and Su, Y. W. and Chen, C. D. (2007) Control and detection of organosilane polarization on nanowire field-effect transistors. NANO LETTERS, 7 (12). pp. 3656-3661.

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We demonstrated control and detection of UV-induced 3-aminopropyltriethoxysilane (APTES) polarization using silicon nanowire field-effect transistors made by top-down lithograph technology. The electric dipole moment in APTES films induced by UV-illumination was shown to produce negative effective charges. When individual dipoles were aligned with an externally applied electric field, the collective polarization can prevail over the UV-induced charges in the wires and give rise to an abnormal resistance enhancement in n-type wires. Real-time detection of hybridization of 15-mer poly-T/poly-A DNA molecules was performed, and the amount of hybridization-induced charges in the silicon wire was estimated. Based on these results, detection sensitivity of the wire sensors was discussed.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanostructured materials
ID Code:1183
Deposited By:Anuj Seth
Deposited On:16 Dec 2008 15:32
Last Modified:20 Jan 2009 10:22

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