晶种面织构对溶液化学法生长ZnO纳米棒的影响  

Influence of Texture of Seed Surface on Growth of ZnO Nanorods by Solution Chemical Method

作　　者：赵娟[1] 靳正国[1] 刘晓新[1] 

机构地区：[1]先进陶瓷与加工技术教育部重点实验室,天津大学材料学院,天津300072

出　　处：《无机化学学报》2005年第11期1643-1648,共6页Chinese Journal of Inorganic Chemistry

基　　金：天津市重点基础研究项目(No.33802311)资助。

摘　　要：采用化学沉积法,在ZnO晶种面上研究了纳米棒于70℃过饱和硝酸锌/氢氧化钠溶液中的定向生长。通过sol-gel法在玻璃基底上引入了ZnO的晶种面,通过热处理温度、冷却方式和拉膜速度改变其织构,重点考察其对ZnO纳米棒生长形态的影响。采用XRD和SEM分析了不同晶种面以及相应棒晶的生长形态。结果表明,随热处理温度的提高,晶种长大,相应的棒晶直径从25nm增加到50nm,1.5h的生长棒长达约800nm。300￣400℃热处理、急冷或低的拉膜速度条件下制备的晶种面具有更高的晶体取向和较少的表面缺陷。从而导致生长面高的成核密度,使得ZnO纳米棒能够在垂直于基底的方向上择优生长。ZnO nanorods on ZnO-coated seed surfaces were fabricated by chemical deposition method using supersaturated Zn（NO3）2/NaOH at 70℃. ZnO seed surfaces were coated on glass substrates by a sol-gel process, and their texture was dominated by heating temperatures, cooling styles and drawing speeds of coating. The effects of the seed surface on the morphology of resuhant nanorods were primarily studied. The orientation and morphology of both the seed surface and corresponding nanorods were analyzed by using XRD and SEM. It is proved that when the seed size increases from 15 nm to 50 nm with temperature, the average diameter of resultant nanorods increase from 25 nm to 50 nm, with a length of 800 nm after 1.5 h. The seed surface prepared by heating at 300-400℃, fast cooling or drawing at lower speed has better orientation and few surface defects, which leads to higher density of nuclei on the seed surface and thus the preferred crystal growth of ZnO rods perpendicular onto substrates.

关 键 词：ZNO纳米棒 晶种面 溶液化学法 晶体生长 

分 类 号：O641[理学—物理化学]