Controlled Growth of the Ordered Cadmium Sulfide Particulate Films and the Photoacoustics Investigation
Controlled Growth of the Ordered Cadmium Sulfide Particulate Films and the Photoacoustics Investigation
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DOI：
10.1021/jp9718212
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发表时间：
1997-11
影响因子：
3.3
通讯作者：
Z. Pan;X. Liu;S. Y. Zhang;G. Shen;Libei Zhang;†. A. Z. H. Lu;J. Z. Liu
中科院分区：
文献类型：
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作者：
Z. Pan;X. Liu;S. Y. Zhang;G. Shen;Libei Zhang;†. A. Z. H. Lu;J. Z. Liu
通过将硬脂酸（SA）朗缪尔单分子层暴露于硫化氢（H2S）气体中，原位制备了两种硫化镉（CdS）颗粒膜：由定向棒状纳米晶组成的颗粒膜（A型颗粒膜）和由点状纳米晶组成的颗粒膜（B型颗粒膜）。将SA包覆的CdS颗粒膜转移到固体基底上，并通过透射电子显微镜（TEM）和光声光谱（PAS）进行检测。利用透射电子显微镜的暗场像和透射电子衍射对CdS颗粒膜的形貌和生长机理进行了详细的研究。由定向棒状纳米晶组成的CdS颗粒膜的PAS在417.5nm处显示出一个新的峰。该峰的出现暗示了半导体纳米晶有序排列所对应的一些新的物理现象。
Two kinds of cadmium sulfide (CdS) particulate films have been generated in situ by exposing stearic acid (SA) Langmuir monolayer at the air−aqueous CdCl2 interface to hydrogen sulfide (H2S) gas: particulate films composed of oriented rodlike nanocrystals (A-type particulate films), and those of dotlike nanocrystals which formed a stripelike domain with straight edges aligned with 6-fold symmetry (B-type particulate films). The SA- coated CdS particulate films were transferred to a solid substrate and examined by transmission electron microscopy (TEM) and photoacoustic spectroscopy (PAS). The dark field image and the transmission electron diffraction of the TEM were used to study the morphology and growth mechanisms of the CdS particulate films in detail. The PAS of the CdS particulate films composed of the oriented rodlike nanocrystals shows a new peak at 417.5 nm. This peak implies some new physical phenomena corresponding to the ordered alignment of the semiconductor nanocrystals, which exists in the ...