Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/70115
標題: Control and detection of organosilane polarization on nanowire field-effect transistors
作者: Lin, M.C.
Chu, C.J.
Tsai, L.C.
Lin, H.Y.
Wu, C.S.
Wu, Y.P.
Wu, Y.N.
Shieh, D.B.
Su, Y.W.
Chen, C.D.
關鍵字: self-assembled monolayers
ray photoelectron-spectroscopy
atomic-force
microscopy
electrical detection
silicon nanowires
dna
3-aminopropyltriethoxysilane
surfaces
film
nanosensors
期刊/報告no:: Nano Letters, Volume 7, Issue 12, Page(s) 3656-3661.
摘要: 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.
URI: http://hdl.handle.net/11455/70115
ISSN: 1530-6984
文章連結: http://dx.doi.org/10.1021/nl0719170
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