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半导体低维纳米材料的制备与表征
Synthesis and Characterization of One Dimensional Semiconductor Materials
【作者】 李春华;
【导师】 刘光焕;
【作者基本信息】 太原理工大学 , 材料学, 2006, 硕士
【摘要】 近年来,宽带隙半导体材料—GaN一维纳米材料已引起了人们极大的兴趣,这些纳米材料具有许多独特的性能并且在光、电及机械等方面具有极大的应用潜能。本文对GaN和TiO2一维纳米材料的合成、显微结构及物性进行了系统研究。主要结果如下: 1、在一两端开口的管式炉中,用简单的氨化法,在1000℃合成出大量高质量的氮化镓纳米线。本文选用氧化镓和氨气为原料,氧化铟为催化剂合成氮化镓纳米线。在相同的实验条件下,氧化镓含量不同时,合成了氮化镓纳米晶须。利用场发射扫描电镜(FESEM)、能谱分析(EDS)、X-Ray衍射(XRD)、选区电子衍射(SAED)及高分辨透射电镜(HRTEM)对试样进行了表征,结果表明:得到的纳米线平直、光滑,其直径在30-50nm范围内,长度可达几十微米。纳米线是具有六方晶系纤锌矿结构的GaN单晶体,且纳米线中缺陷很少,最后对其生长机理进行了讨论。纳米晶须的直径在200nm左右,粗细不均匀,长度从几十纳米到几百纳米不等,表面形貌不规则,多呈层状结构。 2、通过金属镓与氨气直接反应,在单晶硅基片表面,以氧化铟作催化剂,在水平管式炉中成功制备出氮化镓纳米线。FESEM、XRD、HRTEM
【Abstract】 Recently, a great deal of interest in wide band gap semiconductor of one -dimensional GaN nanomaterials has been stimulated by the discovery of novel property and potential application in optical, electric and mechanical fields. In this disserctation, one-dimensional GaN nanowires were systematically synthesized and investigated. The main results are as follows.1. In tubular furnace, high quality GaN nanowires were synthesized by ammoniation at 1000℃. Ga2O3 and NH3 were used as starting materials to prepare GaN nanowires. The change in the content of Ga2O3 resulted in the synthesis of GaN nanowhiskers. Field emission scanning electron microscope (FESEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) were used to characterize the
【Key words】 one dimensional nanomaterials; wide band gap semiconductor; GaN; structural characterization;
- 【网络出版投稿人】 太原理工大学 【网络出版年期】2006年 11期
- 【分类号】TB383.1;TN304
- 【被引频次】2
- 【下载频次】355