( 湖南大學(xué) 材料科學(xué)與工程學(xué)院， 長沙 410082)
摘 要: 采用熱蒸發(fā)法制備了類金剛石碳納米線，利用透射電子顯微鏡（TEM）和高分辨率透射電子顯微鏡（HRTEM）對樣品的形貌和結(jié)構(gòu)進(jìn)行觀察， 發(fā)現(xiàn)該碳納米線具有圓形實心結(jié)構(gòu)，表面光滑， 直徑10~40nm； 拉曼光譜研究顯示特征峰出現(xiàn)在1352cm-1和1586cm-1處， 為典型的類金剛石結(jié)構(gòu)。用CO輔助生長機(jī)理解釋類金剛石碳納米線的形成過程。
關(guān)鍵字: 碳納米線； 熱蒸發(fā)法； 類金剛石； 生長機(jī)理
（ College of Materials Science and Engineering, Hunan University, Changsha 410082, China）
Abstract: Diamond-like carbon nanowires were synthesized by a thermal evaporation method. By heating a pressed tablet of graphite powder mixed with nickel powers in a quartz tube mounted inside a high-temperature tube furnace at 1200℃, diamond-like carbon nanowires were found on the inner wall of the quartz tube near a water-cooling copper finger. The morphology and structure of the carbon nanowires were studied by transmission electron microscopy (TEM) and high resolution transmission electron microscopy ( HRTEM). The nanowires have solid structure and are 10～40nm in diameter. Raman study reveals that the spectra at 1352 and 1586cm-1 , which is agreed with diamond-like carbon structure. A CO-assisted growth model is used to explain the growth process.
Key words: carbon nanowire; thermal evaporation; diamond-like material; growth mechanism
