Department of Applied and Environmental Chemistry, University of Szeged, Szeged, 6720, Rerrich B. ter 1, Hungary.
MTA-SZTE "Lendület" Photoelectrochemistry Research Group, University of Szeged, Szeged, 6720, Rerrich B. ter 1, Hungary.
Sci Rep. 2017 Aug 25;7(1):9557. doi: 10.1038/s41598-017-10055-0.
In the past two decades, important results have been achieved in the field of carbon nanotube (CNT) research, which revealed that carbon nanotubes have extremely good electrical and mechanical properties The range of applications widens more, if CNTs form a forest-like, vertically aligned structure (VACNT) Although, VACNT-conductive substrate structure could be very advantageous for various applications, to produce proper system without barrier films i.e. with good electrical contact is still a challenge. The aim of the current work is to develop a cheap and easy method for growing carbon nanotubes forests on conductive substrate with the CCVD (Catalytic Chemical Vapor Deposition) technique at 640 °C. The applied catalyst contained Fe and Co and was deposited via dip coating onto an aluminum substrate. In order to control the height of CNT forest several parameters were varied during the both catalyst layer fabrication (e.g. ink concentration, ink composition, dipping speed) and the CCVD synthesis (e.g. gas feeds, reaction time). As-prepared CNT forests were investigated with various methods such as scanning electron microscopy, Raman spectroscopy, and cyclic voltammetry. With such an easy process it was possible to tune both the height and the quality of carbon nanotube forests.
在过去的二十年中，碳纳米管（CNT）研究领域取得了重要成果，研究表明碳纳米管具有极其优异的电学和力学性能，其应用范围进一步扩大。如果 CNT 形成森林状、垂直排列的结构（VACNT），尽管 VACNT 导电衬底结构可能对各种应用非常有利，但要生产没有阻挡层的合适系统，即具有良好电接触的系统，仍然是一个挑战。本工作的目的是开发一种在 640°C 下使用催化化学气相沉积（CCVD）技术在导电衬底上生长碳纳米管森林的廉价且简便的方法。所使用的催化剂含有 Fe 和 Co，通过浸涂沉积在铝衬底上。为了控制 CNT 森林的高度，在制备催化剂层（例如墨水浓度、墨水组成、浸渍速度）和 CCVD 合成（例如气体进料、反应时间）的过程中，对几个参数进行了优化。采用扫描电子显微镜、拉曼光谱和循环伏安法等多种方法对所制备的 CNT 森林进行了研究。通过如此简单的工艺，可以同时调整碳纳米管森林的高度和质量。
