Photon-induced formation of CdS nanocrystals in selected areas of polymer matrices

被引:28
作者
Athanassiou, Athanassia
Cingolani, Roberto
Tsiranidou, Elsa
Fotakis, Costas
Laera, Anna Maria
Piscopiello, Emanuela
Tapfer, Leander
机构
[1] CNR, INFM, NNL, I-73100 Lecce, Italy
[2] IIT, Genoa, Italy
关键词
D O I
10.1063/1.2790484
中图分类号
O59 [应用物理学];
学科分类号
摘要
We demonstrate light-induced formation of semiconductor quantum dots in TOPAS (R) polymer matrix with very high control of their size and their spatial localization. Irradiation with UV laser pulses of polymer films embedding Cd thiolate precursors results in the formation of cadmium sulfide nanocrystals well confined in the irradiation area, through a macroscopically nondestructive procedure for the host matrix. With increasing number of laser pulses, we accomplish the formation of nanoparticles with gradually increasing dimensions, resulting in the dynamic change of the spectra emitted by the formed nanocomposite areas. The findings are supported by x-ray diffraction and transmission electron microscopy measurements. (C) 2007 American Institute of Physics.
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页数:3
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