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    Metal-free silicon-molecule-nanotube testbed and memory device
    1.
    发明申请
    Metal-free silicon-molecule-nanotube testbed and memory device 失效
    无金属硅分子纳米管测试和记忆装置

    公开(公告)号：US20070111486A1

    公开(公告)日：2007-05-17

    申请号：US11337456

    申请日：2006-01-23

    Applicant: James Tour ,  Jianli He ,  Bo Chen ,  Austen Flatt ,  Jason Stephenson ,  Condell Doyle

    Inventor： James Tour ,  Jianli He ,  Bo Chen ,  Austen Flatt ,  Jason Stephenson ,  Condell Doyle

    IPC: H01L21/20

    CPC classification number: G11C13/02 ,  B82Y10/00 ,  B82Y30/00 ,  G11C13/0014 ,  G11C13/025 ,  H01L27/283 ,  H01L51/0048 ,  H01L51/005 ,  H01L51/0052 ,  H01L51/0595

    Abstract: Work from several laboratories has shown that metal nanofilaments cause problems in some molecular electronics testbeds. A new testbed for exploring the electrical properties of single molecules has been developed to eliminate the possibility of metal nanofilament formation and to ensure that molecular effects are measured. This metal-free system uses single-crystal silicon and single-walled carbon nanotubes as electrodes for the molecular monolayer. A direct Si-arylcarbon grafting method is used. Use of this structure with π-conjugated organic molecules results in a hysteresis loop with current-voltage measurements that are useful for an electronic memory device. The memory is non-volatile for more than 3 days, non-destructive for more than 1,000 reading operations and capable of more than 1,000 write-erase cycles before device breakdown. Devices without π-conjugated molecules (Si—H surface only) or with long-chain alkyl-bearing molecules produced no hysteresis, indicating that the observed memory effect is molecularly relevant.

    Abstract translation: 几个实验室的工作表明，金属纳米丝在一些分子电子测试台中引起问题。 已经开发了用于探索单分子的电性质的新试验台，以消除金属纳米丝形成的可能性并确保测量分子效应。 该无金属系统使用单晶硅和单壁碳纳米管作为分子单层的电极。 使用直接的Si-芳基碳接枝方法。 这种结构与π-共轭有机分子的使用导致了对电子存储器件有用的电流 - 电压测量的滞后回路。 存储器非易失性超过3天，对于超过1,000次读取操作是非破坏性的，并且在器件故障之前能够进行超过1,000次写擦除周期。 没有pi共轭分子（仅有Si-H表面）或具有长链烷基的分子的器件没有产生滞后，表明观察到的记忆效应是分子相关的。

    Functionalization of Carbon Nanotubes in Acidic Media
    3.
    发明申请
    Functionalization of Carbon Nanotubes in Acidic Media 审中-公开
    酸性介质中碳纳米管的功能化

    公开(公告)号：US20070280876A1

    公开(公告)日：2007-12-06

    申请号：US10593918

    申请日：2005-03-24

    Applicant: James Tour ,  Jared Hudson ,  Christopher Dyke ,  Jason Stephenson

    Inventor： James Tour ,  Jared Hudson ,  Christopher Dyke ,  Jason Stephenson

    IPC: C01B31/02

    CPC classification number: B82Y30/00 ,  B82Y40/00 ,  C01B32/174 ,  C01B2202/02 ,  C01B2202/04 ,  C01B2202/06 ,  C01B2202/36

    Abstract: The present invention is generally directed to methods of functionalizing carbon nanotubes (CNTs) in acidic media. By first dispersing CNTs in an acidic medium, bundled CNTs can be separated as individual CNTs, affording exposure of the CNT sidewalls, and thereby facilitating the functionalization of such CNTs, wherein functional groups are attached to the subsequently exposed sidewalls of these individualized CNTs. Once dispersed in this substantially unhundled state, the CNTs are functionalized according to one or more of a variety of functionalization processes. Typically, ultrasonication or non-covalent wrapping is not needed to afford such dispersion and subsequent functionalization. Additionally, such methods are easily scalable and can provide for sidewall-functionalized CNTs in large, industrial-scale quantities.

    Abstract translation: 本发明一般涉及在酸性介质中官能化碳纳米管（CNTs）的方法。 通过首先将CNT分散在酸性介质中，可将捆束的CNT作为单独的CNT分离，提供CNT侧壁的暴露，从而促进这种CNT的功能化，其中官能团连接到这些个体化CNT的随后暴露的侧壁。 一旦分散在这个基本上未被共享的状态，CNT根据各种官能化过程中的一种或多种进行功能化。 通常，不需要超声波或非共价包装来提供这种分散和随后的功能化。 另外，这种方法易于扩展，并且可以以大型工业规模的量提供侧壁官能化的CNT。

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