Fabre Bruno, Hauquier Fanny, Herrier Cyril, Pastorin Giorgia, Wu Wei, Bianco Alberto, Prato Maurizio, Hapiot Philippe, Zigah Dodzi, Prasciolu Mauro, Vaccari Lisa
Université de Rennes 1 and CNRS UMR 6226 Sciences Chimiques de Rennes, Matière Condensée et Systèmes Electroactifs MaCSE, Campus de Beaulieu, 35042 Rennes Cedex, France.
Langmuir. 2008 Jun 1;24(13):6595-602. doi: 10.1021/la800358w. Epub 2008 Jun 5.
Multiwalled carbon nanotubes (MWNTs) covalently bound to monocrystalline p-type Si(111) surfaces have been prepared by attaching soluble amine-functionalized MWNTs onto a preassembled undecanoic acid monolayer using carbodiimide coupling. SEM analysis of these functionalized surfaces shows that the bound MWNTs are parallel to the surface rather than perpendicular. The voltammetric and electrochemical impedance spectroscopy measurements reveal that the electron transfer at the MWNT-modified surface is faster than that observed at a MWNT-free alkyl monolayer. We have also demonstrated that it is possible to prepare MWNT micropatterns using this surface amidation reaction and a "reagentless" UV photolithography technique. Following this approach, MWNT patterns surrounded by n-dodecyl areas have been produced and the local electrochemical properties of these micropatterned surfaces have been examined by scanning electrochemical microscopy. In particular, it is demonstrated that the MWNT patterns allow a faster charge transfer which is consistent with the results obtained for the uniformly modified surfaces.
通过使用碳二亚胺偶联将可溶性胺官能化多壁碳纳米管（MWNTs）附着到预组装的十一烷酸单层上，制备了共价结合到单晶p型Si(111)表面的多壁碳纳米管。对这些功能化表面的扫描电子显微镜（SEM）分析表明，结合的多壁碳纳米管与表面平行而非垂直。伏安法和电化学阻抗谱测量结果表明，多壁碳纳米管修饰表面的电子转移比在无多壁碳纳米管的烷基单层表面观察到的更快。我们还证明了使用这种表面酰胺化反应和“无试剂”紫外光刻技术制备多壁碳纳米管微图案是可行的。按照这种方法，制备出了被正十二烷基区域包围的多壁碳纳米管图案，并通过扫描电化学显微镜对这些微图案表面的局部电化学性质进行了研究。特别地，结果表明多壁碳纳米管图案允许更快的电荷转移，这与均匀修饰表面所获得的结果一致。
