The a.c. conductivity of aperiodic DNA revisited
文献类型：期刊论文
| 作者 | Ladik, J; Ye, YJ; Shen, L |
| 刊名 | SOLID STATE COMMUNICATIONS
 |
| 出版日期 | 2004-07 |
| 卷号 | 131期号:3-4页码:207-210 |
| 关键词 | frequency dependent conductivity hopping in DNA dipole energy loss of water |
| ISSN号 | 0038-1098 |
| DOI | 10.1016/j.ssc.2004.05.002 |
| 文献子类 | Article |
| 英文摘要 | Recent measurements of the frequency-dependent a.c. conductivity of aperiodic DNA double helices have provided results which are in good agreement with our theoretical findings based on the variable range hopping mechanism in the 1-10(11) s(-1) frequency range at room temperature. At the frequencies 100 GHz-1 THz it is probable that not the hopping mechanism, but dipole energy loss of the water helices surrounding DNA is the dominant cause of the conductivity, because the experiments have given nearly the same conductivites for single and double DNA strands. The theoretical temperature-dependence of the conductivity contrary to experiments, does not show a crossing point and the slopes of the theoretical curves do not become zero even below 60 K. This and the fact that at T approximate to 125 K the experimental sigma(omega) is by one order of magnitude larger than the theoretical value, indicates that at low temperatures not the hopping mechanism, but other ones (like multichannel tunneling, structural thermal fluctuations of the stack) become dominant. (C) 2004 Elsevier Ltd. All rights reserved. |
| WOS关键词 | HOPPING CONDUCTIVITY ; DOUBLE HELIX ; TEMPERATURE-DEPENDENCE ; CHARGE-TRANSPORT ; RELAXATION ; WATER ; POLYMERS ; SYSTEMS ; INSULIN ; SPECTRA |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000222698400012 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.183/handle/2S10ELR8/274054]  |
| 专题 | 中国科学院上海药物研究所 |
| 通讯作者 | Ladik, J |
| 作者单位 | 1.Univ Erlangen Nurnberg, Chair Theoret Chem, D-91058 Erlangen, Germany 2.Univ Erlangen Nurnberg, Lab Natl Fdn Canc Res, D-91058 Erlangen, Germany 3.Concurrent Pharmaceut Inc, Ft Washington, PA 19034 USA 4.Chinese Acad Sci, Shanghai Inst Mat Med, Drug Discovery & Design Ctr, Shanghai 201203, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ladik, J,Ye, YJ,Shen, L. The a.c. conductivity of aperiodic DNA revisited[J]. SOLID STATE COMMUNICATIONS,2004,131(3-4):207-210. |
| APA | Ladik, J,Ye, YJ,&Shen, L.(2004).The a.c. conductivity of aperiodic DNA revisited.SOLID STATE COMMUNICATIONS,131(3-4),207-210. |
| MLA | Ladik, J,et al."The a.c. conductivity of aperiodic DNA revisited".SOLID STATE COMMUNICATIONS 131.3-4(2004):207-210. |
入库方式： OAI收割
来源：上海药物研究所
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