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Supersaturation Control Growth of Nanoparticle ZnO and Size Distribution Control
Min Fu1, Ze-shan Hu*1, Min Tang1, Xiao-ping Wei1, Min-hao Shao1, Lan-hua Li1, Yu-lin Deng2
1.College of Environment and Biological Engineering, Chongqing Technology and Business University, Chongqing 400067, China;2.School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta 30332-0620, USA
Abstract:
"Nanoparticle ZnO was synthesized in non-aqueous medium. UV adsorption spectra were measured and effective mass model was used to calculate particle size in situ. A technique method named as supersaturation control growth was developed, which dealt with addition of nanoparticle suspension with small size to another suspension with big size. As a result, those small particles completely dissolved and those big ones totally grew because of dissolution degree difference between small particles and the big ones. The particle number of big particle suspension kept being a constant and the growth rate was much higher than Ostwald ripening. Main characteristic of this technique is that size distribution of nanoparticles can be narrowed provided original size difference of two suspension is big enough and original size distribution is not too broad."
Key words:  ZnO, Nanoparticle, Distribution, Growth kinetics, Adsorption edge, Band gap
FundProject:
纳米氧化锌的过饱和控制生长与大小分布控制.
傅敏1, 胡泽善*1, 汤敏1, 魏小平1, 邵明浩1, 李岚华1, engYu-lin2
1.重庆工商大学,环境与生物工程学院,重庆400067;2.乔治亚理工大学化学与生物分子工程学院,乔治亚州30332-0620
摘要:
"在非水介质中合成了纳米氧化锌,测定了纳米氧化锌的紫外吸收光谱,并用有效质量模型计算了粒子大小,开发并命名了一种称之为纳米粒子过饱和控制生长的技术,该技术涉及将小的纳米粒子悬浊液加入到大的粒子悬浊液中,结果因为不同大小粒子间的溶解度差异小的粒子将全部溶解,大的粒子将整体长大,大粒子悬浊液的粒子数将保持不变,大粒子的生长速度显著比Ostwald老化的高.该技术最显著的特征是只要最初两悬浊液粒子大小的差异足够大,分布不是太宽,则粒子大小的分布将会因为粒子如此长大而变窄."
关键词:  氧化锌,纳米粒子,分布,生长动力学,吸收边,能隙
DOI:10.1088/1674-0068/20/06/811-815
分类号: