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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Water-mediated signal multiplication with Y-shaped carbon nanotubes
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Water-mediated signal multiplication with Y-shaped carbon nanotubes

机译：与Y形碳纳米管进行水介导的信号倍增

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摘要

Molecular scale signal conversion and multiplication is of particular importance in many physical and biological applications, such as molecular switches, nano-gates, biosensors, and various neural systems. Unfortunately, little is currently known regarding the signal processing at the molecular level, partly due to the significant noises arising from the thermal fluctuations and interferences between branch signals. Here, we use molecular dynamics simulations to show that a signal at the single-electron level can be converted and multiplied into 2 or more signals by water chains confined in a narrow Y-shaped nanochannel. This remarkable transduction capability of molecular signal by Y-shaped nanochannel is found to be attributable to the surprisingly strong dipole-induced ordering of such water chains, such that the concerted water orientations in the 2 branches of the Y-shaped nanotubes can be modulated by the water orientation in the main channel. The response to the switching of the charge signal is very rapid, from a few nanoseconds to a few hundred nanoseconds. Furthermore, simulations with various water models, including TIP3P, TIP4P, and SPC/E, show that the transduction capability of the Y-shaped carbon nanotubes is very robust at room temperature, with the interference between branch signals negligible.
机译：在许多物理和生物学应用中，例如分子开关，纳米门，生物传感器和各种神经系统，分子级信号转换和倍增特别重要。不幸的是，对于分子水平的信号处理，目前知之甚少，部分原因是由于热波动和分支信号之间的干扰引起的大量噪声。在这里，我们使用分子动力学模拟来显示单电子水平的信号可以通过限制在窄Y形纳米通道中的水链转换并乘以2个或更多信号。发现Y形纳米通道对分子信号的这种卓越的传导能力归因于这种水链出乎意料的强偶极子诱导的有序排列，因此Y形纳米管的2个分支中一致的水取向可以通过主通道中的水向。对电荷信号切换的响应非常快，从几纳秒到几百纳秒。此外，对各种水模型（包括TIP3P，TIP4P和SPC / E）的仿真显示，Y型碳纳米管的转导能力在室温下非常稳定，分支信号之间的干扰可忽略不计。

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  • 来源
  • 作者

    Yusong Tu; Peng Xiu; Rongzheng Wan; Jun Hu; Ruhong Zhou; Haiping Fang;

  • 作者单位

    Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China Graduate School of the Chinese Academy of Sciences, Beijing 100080, China;

    Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China School of Physics, Shandong University, Jinan 250100, China;

    Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;

    Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;

    IBM Thomas J. Watson Research Center, Yorktown Heights, NY 10598 Department of Chemistry, Columbia University, New York, NY 10027;

    Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    confined water; molecular dynamics; molecular signal transmission; Y-shaped nanochannel; signal transduction;

    机译：承压水;分子动力学分子信号传输;Y型纳米通道;信号转导;

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