The release of free standing vertically-aligned carbon nanotube arrays from a substrate using CO2 oxidation
The release of free standing vertically-aligned carbon nanotube arrays from a substrate using CO2 oxidation
复制标题
DOI：
10.1016/j.carbon.2009.12.038
复制
发表时间：
2010-04
期刊：
影响因子：
10.9
通讯作者：
Jiaqi Huang;Qiang Zhang;Mengqiang Zhao;F. Wei
中科院分区：
文献类型：
--
作者：
Jiaqi Huang;Qiang Zhang;Mengqiang Zhao;F. Wei
利用二氧化碳作为氧化剂，从石英衬底上大规模释放出垂直排列的自由碳纳米管阵列，以削弱阵列与衬底之间的相互作用，促进其收获。在氧化过程中，无定形碳和与金属颗粒接触的碳被优先刻蚀，导致高质量的自由支撑型碳纳米管阵列容易释放。同时用O2作为氧化剂进行比较。O2具有较强的氧化性，导致碳纳米管的形成具有层状-石墨化的异质结结构。对碳纳米管阵列的CO_2和O_2氧化机理进行了研究，认为CO_2是一种更适合碳纳米管阵列氧化的氧化剂。
Free standing vertically-aligned carbon nanotube (CNT) arrays were released from a quartz substrate on a large scale by using CO2as an oxidative reagent to weaken the array–substrate interaction and facilitate their harvest. During the oxidation process, amorphous carbon and carbon in contact with metallic particles were preferentially etched, leading to the easy release of high quality free standing CNT arrays. O2was also used as an oxidant for comparison. The O2showed a stronger oxidizability and caused the formation of CNTs with a turbostratic–graphitic carbon heterojunction structure. The mechanisms of CO2and O2oxidation of CNT arrays were investigated, and based on these results, CO2was considered a more suitable oxidant for the purpose.