Thursday, August 30, 2007

豆腐文摘:08/30/07

Advanced Materials:

1. High-Performance, Flexible Hydrogen Sensors That Use Carbon Nanotubes Decorated with Palladium Nanoparticles (p NA)
Y. Sun, H. H. Wang
Published Online: 29 Aug 2007 DOI: 10.1002/adma.200602975
Abstract References Full Text:PDF (Size: 391K)

【简评】

现在做什么都要flexible,主要是为了适应实际应用的要求。记得某些科幻电影里的flexible display device?用的时候把屏幕一摊,不用的时候一卷往裤筒里一插,多方便。Argonne的Yugang Sun博士和Hau Wang博士的这篇关于氢感应器的卖点正在于此。

传统的Hydrogen sensor(包括碳管做的)都在硬质材料上(比如SiO2);这里,所谓的dry transfer printing技术(参见J. A. Rogers博士近年的作品)被发扬光大,用来把在SiO2上合成的碳管网络给转移到塑料基体的表面;然后往碳管网络表面喷上(electron beam evaporation)有够薄的Pd(喜欢在碳管表面形成纳米颗粒,太厚连起来就不灵了),网络两端再镀上电极,就搞定了一个简单的、测试电阻变化的、有弹性的、可大可小、可以左剪右剪、可以卷起来当烟抽同时还可以查四周有没有氢可能会因为你点上烟而blow your ass off的、N酷的Pd/CNT hydrogen sensor。

空气里的测试灵敏度是30ppm;惰气下因为没有氧气干扰会更加灵敏。当然这个浓度到底灵敏到什么程度还是让哪位有知识的同学跳出来说一下。

2. Bioavailability of Nickel in Single-Wall Carbon Nanotubes (p NA)
X. Liu, V. Gurel, D. Morris, D. W. Murray, A. Zhitkovich, A. B. Kane, R. H. Hurt
Published Online: 23 Aug 2007 DOI: 10.1002/adma.200602696
Abstract References Full Text:PDF (Size: 966K)


Chemistry - A European Journal:

Grafting Living Polymers onto Carbon Nanohorns (p NA)
Grigoris Mountrichas, Stergios Pispas, Nikos Tagmatarchis
Published Online: 3 Aug 2007 DOI: 10.1002/chem.200700770
Abstract References Full Text:PDF (Size: 547K)

Journal of Materials Chemistry:

Construction of metal nanoparticle/multiwalled carbon nanotube hybrid nanostructures providing the most accessible reaction sites

Tie Wang, Xiaoge Hu and Shaojun Dong,
J. Mater. Chem., 2007 DOI: 10.1039/b707481f

JPCC:

Adsorption and Surface Reactivity on Single-Walled Boron Nitride Nanotubes Containing Stone-Wales Defects Wei An, Xiaojun Wu, J. L. Yang, and X. C. Zeng

Web Release Date: 30-Aug-2007; (Article) DOI: 10.1021/jp072443w
Abstract Full: HTML / PDF (491K)

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