Site-specific nucleation and growth kinetics in hierarchical nanosyntheses of branched ZnO crystallites.
Site-specific nucleation and growth kinetics in hierarchical nanosyntheses of branched ZnO crystallites.
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DOI：
10.1021/ja0631596
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发表时间：
2006-07
影响因子：
15
通讯作者：
Tierui Zhang;W. Dong;Mary Keeter-Brewer;Sanjit Konar;Roland N. Njabon;Z. Tian
中科院分区：
文献类型：
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作者：
Tierui Zhang;W. Dong;Mary Keeter-Brewer;Sanjit Konar;Roland N. Njabon;Z. Tian
本文报道了一种在溶液纳米合成中系统构建分层、复杂和定向ZnO微纳米结构的位点特异性顺序成核和生长途径。产物的结构和形貌通过x射线衍射和扫描电镜研究得到了证实。有机结构导向剂（SDAs），二氨基丙烷和柠檬酸盐，在控制这些新形态的演变中发挥了不同的作用。通过SDAs在初级ZnO棒不同晶面上的选择性吸附，我们实现了二级和三级复合纳米结构的交替生长。系统地研究了SDA浓度、成核时间和生长动力学在溶液级联ZnO纳米合成中的作用。
Here we report a site-specific sequential nucleation and growth route to the systematic building of hierarchical, complex, and oriented ZnO micro/nanostructures in solution nanosynthesis. Structures and morphologies of the products were confirmed by results from X-ray diffraction and scanning electron microscopy studies. The organic structure-directing agents (SDAs), diaminopropane and citrate, are found to play different roles in controlling the evolution of these new morphologies. Through the selective adsorptions of SDAs on different crystal facets of the primary ZnO rods, we have alternated the hierarchical growth of secondary and tertiary new complex nanostructures. Roles of the SDA concentration, nucleation time, and growth kinetics in the solution hierarchical ZnO nanosyntheses have all been systematically investigated.