Bibliographic Details
| Title: |
Control and Detection of Organosilane Polarization on Nanowire Field-Effect Transistors. |
| Authors: |
M. C. Lin1, C. J. Chu1, L. C. Tsai1, H. Y. Lin1, C. S. Wu1, Y. P. Wu1, Y. N. Wu1, D. B. Shieh1, Y. W. Su1, C. D. Chen1 |
| Source: |
Nano Letters. Dec2007, Vol. 7 Issue 12, p3656-3661. 6p. |
| Subjects: |
Nonmetals, Nucleic acid hybridization, Electric fields, Nucleic acids |
| 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. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
