Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA.
Langmuir. 2012 May 8;28(18):7189-96. doi: 10.1021/la2050674. Epub 2012 Apr 24.
We examine the hypothesis that selective adsorption to a particular face of ZnO is responsible for the ability of small organic molecules to control the aspect ratio of ZnO crystals during hydrothermal synthesis. Large, single crystals of ZnO were prepared such that the vast majority of a surface consisted of a single crystal plane, as shown by atomic force microscopy, and the adsorption to a single crystal plane was determined by attenuated total reflectance spectroscopy. The results show that citrate strongly and selectively adsorbs to the (0001) face. Similarly, results show that ethylenediamine selectively adsorbs to the (1010) face. Each of these results separately shows a correlation between selective adsorption to and growth of large areas of a particular face, and thus, each result is consistent with the proposed hypothesis.
我们检验了一个假说，即选择性吸附到 ZnO 的特定面是小分子有机物质在水热合成过程中控制 ZnO 晶体纵横比的能力的原因。通过原子力显微镜可以看出，我们制备了大量的 ZnO 单晶，使得其表面的绝大部分都由单一的晶面组成，并且通过衰减全反射光谱法确定了对单一晶面的吸附作用。结果表明，柠檬酸强烈且选择性地吸附到（0001）面。同样，结果表明乙二胺选择性地吸附到（1010）面。这两个结果都分别显示出了选择性吸附和大面积特定晶面生长之间的相关性，因此，每个结果都与提出的假说一致。
