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: 3-九月-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
顯示於類別:期刊論文