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Title: Control and Detection of Organosilane Polarization on Nanowire Field-Effect Transistors
Authors: Lin, M. C.;Chu, C. J.;Tsai, L. C.;Lin, H. Y.;Wu, Cen-Shawn;Wu, Y. P.;Wu, Y. N.;Shieh, D. B.;Su, Y. W.;Chen, C. D.
Contributors: 物理學系
Date: 2007
Issue Date: 2013-03-12T04:06:31Z
Publisher: American Chemical Society
Abstract: 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.
Relation: Nano Letters, 7(12): 3656-3661
Appears in Collections:[Department of Physics] Periodical Articles

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