Ni2+ doping DNA: A semiconducting biopolymer

Peng Chung Jang Jian, Tzeng Feng Liu, Chuan Mei Tsai, Ming Shih Tsai, Chia-Ching Chang*


研究成果: Article同行評審

16 引文 斯高帕斯(Scopus)


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 π-π stacking of DNA base pairs. This biomaterial is a designable one-dimensional semiconducting polymer for usage in nanodevices.

出版狀態Published - 3 9月 2008


深入研究「Ni2+ doping DNA: A semiconducting biopolymer」主題。共同形成了獨特的指紋。