کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
613592 | 880724 | 2006 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Growth of ultrathin films of cadmium telluride and tellurium as studied by electrochemical atomic force microscopy Growth of ultrathin films of cadmium telluride and tellurium as studied by electrochemical atomic force microscopy](/preview/png/613592.png)
Time dependent, cathodic electrodeposition of ultrathin CdTe and Te films has been studied in 50 mM H2SO4 + 1 mM CdSO4 + 0.1 mM TeO2 solutions at room temperature under potential control using electrochemical atomic force microscopy (EC-AFM). The films were also characterized electrochemically and with X-ray diffraction. The growth mechanism and the composition of the films depends on the applied potentials. Island-like growth mode was observed for CdTe films when the deposition potential was −0.35 V−0.35 V (SHE). At a more positive deposition potential of 0.138 V (SHE), Cd was not codeposited into the film but affected the dynamic growth mode of the deposit. At this voltage smooth Te films were obtained. Depending on the applied potential, Cd acts either as a codeposition element for CdTe film growth, or as a mediator for layer-by-layer growth of Te films.
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Journal: Journal of Colloid and Interface Science - Volume 300, Issue 1, 1 August 2006, Pages 404–412