標題: | Ni2+ doping DNA: a semiconducting biopolymer |
作者: | Jian, Peng-Chung Jang Liu, Tzeng-Feng Tsai, Chuan-Mei Tsai, Ming-Shih Chang, Chia-Ching 材料科學與工程學系 生物科技學系 Department of Materials Science and Engineering Department of Biological Science and Technology |
公開日期: | 3-Sep-2008 |
摘要: | DNA is a one-dimensional nanowire in nature, and it may not be used in nanodevices due to its low conductivity. In order to improve the conducting property of DNA, divalent Ni2+ are incorporated into the base pairs of DNA at pH >= 8.5 and nickel DNA (Ni-DNA) is formed. Conducting scanning probe microscopy (SPM) analysis reveals that the Ni-DNA is a semiconducting biopolymer and the Schottky barrier of Ni-DNA reduces to 2 eV. Meanwhile, electrochemical analysis by cyclic voltammetry and AC impedance shows that the conductance of Ni-DNA is better than that of native DNA by a factor of approximately 20-fold. UV spectroscopy and DNA base pair mismatch analyses show that the conducting mechanism of Ni-DNA is due to electrons hopping through the pi-pi stacking of DNA base pairs. This biomaterial is a designable one-dimensional semiconducting polymer for usage in nanodevices. |
URI: | http://dx.doi.org/10.1088/0957-4484/19/35/355703 http://hdl.handle.net/11536/149479 |
ISSN: | 0957-4484 |
DOI: | 10.1088/0957-4484/19/35/355703 |
期刊: | NANOTECHNOLOGY |
Volume: | 19 |
Appears in Collections: | Articles |