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Functionalization of carbon nanotubes with silver clusters

机译:具有银团簇的碳纳米管的功能化

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摘要

In this paper, an advanced method of one-step functionalization of single and multi walled carbon nanotubes (SWCNTs and MWCNTs) using γ-irradiation was described. Two synthesis procedures, related with different reduction species, were employed. For the first time, poly(vinyl alcohol) PVA is successfully utilized as a source to reduce silver (Ag) metal ions without having any additional reducing agents to obtain Ag nanoparticles on CNTs. The decoration of carbon nanotubes with Ag nanoparticles takes place through anchoring of (PVA) on nanotube's surface. Optical properties of as-prepared samples and mechanism responsible for the functionalization of carbon nanotubes were investigated using UV-vis and FTIR spectroscopy, respectively. Decorated carbon nanotubes were visualized using microscopic techniques: transmission electron microscopy and scanning tunneling microscopy. Also, the presence of Ag on the nanotubes was confirmed using energy dispersive X-ray spectroscopy. This simple and effective method of making a carbon nanotube type of composites is of interest not only for an application in various areas of technology and biology, but for investigation of the potential of radiation technology for nanoengineering of materials.
机译:在本文中,描述了一种使用γ辐射对单壁和多壁碳纳米管(SWCNT和MWCNT)进行单步功能化的高级方法。使用了两种与不同还原物种有关的合成程序。聚乙烯醇PVA首次成功地用作还原银(Ag)金属离子的来源,而无需任何其他还原剂即可在CNT上获得Ag纳米粒子。用银纳米颗粒装饰碳纳米管是通过将(PVA)锚定在纳米管表面进行的。分别使用UV-vis和FTIR光谱研究了所制备样品的光学性质和负责碳纳米管功能化的机理。装饰的碳纳米管使用显微镜技术可视化:透射电子显微镜和扫描隧道显微镜。另外,使用能量色散X射线光谱法确认了Ag在纳米管上的存在。这种简单而有效的制备碳纳米管类型复合材料的方法不仅对技术和生物学各个领域的应用感兴趣,而且对研究辐射技术对材料进行纳米工程的潜力也具有重要意义。

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