添加前驅物的電弧放電法合成奈米碳管的研究

Synthesis of Carbon Nanotube with Precursor by Arc Discharge

林景正(M. C. C. Lin) ； 賴宏仁(H. J. Lai) ； 楊明輝(M. H. Yang) ； 江柏風(B. F. Jiang) ； 溫志中(J. C. Wen) ； 栗愛綱(A. K. Li)

《材料科學與工程》 35卷2期 (2003/06) Pp. 117-120

https://doi.org/10.6409/JMSE.200306.0117

摘要

奈米碳管相對於一般材料有著明顯的不同，在結構、機械、光、電、磁等物性方面的優點，使其深具廣泛應用的潛力。本研究以電弧放電方式合成CNT，並添加PAH前驅物。陰極石墨沈積表面的頂面SEM，可見類六邊形的結構。從縱剖面可知，其爲沿軸向分佈的類六邊形排列的柱狀物，具有纖維組織，此互相平行的平行柱大致沿著沈積軸排列。HRTEM影像可觀察到核心中空，多層石墨層則沿管軸同心排列。PAH可作爲CNT合成的建構塊，經由高溫石墨化程序，使PAH轉化成石墨層狀結構的CNT。

關鍵字

奈米碳管 ； 電弧放電 ； 前驅物

並列摘要

The outstanding characteristics of carbon nanotube (CNT) including structure, mechanical, optical, electric, and magnetic properties generate a great number of exciting possible applications. The influence of starting carbon materials on the synthesis of CNT is investigated. Comparisons are made between graphite rods and polycyclic aromatic hydrocarbon (PAR) as carbon source in helium arc discharge. The SEM micrographs of CNT deposits formed on the top surface of cathode show quasi-hexagonal structure. The column structures of CNT along the deposition axis of graphite rod approximately are seen in the cross-section of specimen. The fine columnar structure consists of randomly oriented fiber-like CNTs. HRTEM image clearly shows the characteristic feature of multi-walled CNT. CNT core is hollow with multiple layers parallel to CNT axis on the wall. PAH can serve as building blocks for CNT formation. The high temperature graphitization process induced by the arc plasma enables the hydrocarbons acted as carbon sources and changes the aromatic species into the layered graphitic structure of CNT.

並列關鍵字

Carbon nanotube CNT ； Arc discharge ； Precursor