tailieunhanh - Báo cáo hóa học: " Study on the Electric Conductivity of Ag-Doped DNA in Transverse Direction"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Study on the Electric Conductivity of Ag-Doped DNA in Transverse Direction | Nanoscale Res Lett 2009 4 321-326 DOI s11671-008-9245-y NANO EXPRESS Study on the Electric Conductivity of Ag-Doped DNA in Transverse Direction Ge Ban Ruixin Dong Ke Li Hongwen Han Xunling Yan Received 5 October 2008 Accepted 30 December 2008 Published online 17 January 2009 to the authors 2009 Abstract In this article we reported a novel experiment results on Ag-doped DNA conductor in transverse direction. I-V characteristics were measured and the relative conductances were calculated for different silver ions concentrations. With the increase of the concentration of silver ions the conductive ability of DNA risen rapidly the relative conductance of DNA enhanced about three magnitudes and reached a stable value when Ag concentration was up to mM. In addition Raman spectra were carried out to analyse and confirm conduction mechanism. Keywords Ag-doped DNA Gold electrode Relative conductance Increase Raman spectra Introduction Deoxyribose nucleic acid DNA has taken centre stage in biophysical chemistry research during the past few decades. The elucidation of the molecular structure 50 years ago and the translation of the genetic code revolutionized the field of biotechnology. They sparked the creation of whole new industries based on this knowledge and on the various tools and technologies that have subsequently developed. Biologically the function of DNA is to code functional proteins that are the expressed form of hereditary genetic information. But in the past few years the G. Ban El R. Dong K. Li H. Han X. Yan School of Physical Science and Information Technology Liaocheng University Liaocheng Shandong 252059 China e-mail geban119@ R. Dong e-mail dongruixin@ discovery that DNA can conduct electrical current has made it an interesting candidate for other roles that nature did not intend for this molecule 1 . There has recently been an increased interest in charge transport in DNA due to both its relevance in physiological reactions