Effect of X-ray irradiation on the optical absorption of 小dSe_{1鈭?span style='font-style: italic'>x}Te_x nanocrystals embedded in borosilicate glass

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• 作者：M.V. Prymak^a ; Yu.M. Azhniuk^a ; ^{yu.azhniuk@gmail.com} ; A.M. Solomon^a ; V.M. Krasilinets^a ; V.V. Lopushansky^a ; I.V. Bodnar^b ; A.V. Gomonnai^a ; D.R T. Zahn^c
• 关键词：Semiconductor nanocrystals ; Borosilicate glass ; X-ray irradiation ; Optical absorption ; Ionization
• 刊名：Radiation Physics and Chemistry
• 出版年：2012
• 期刊代码：68_0969806x
• 类别：ph
• 出版时间：July, 2012
• 卷：81
• 期：7
• 页码：766-770
• 文件大小：573 K

摘要

The effect of X-ray irradiation on the optical absorption spectra of CdSe_1鈭?em>xTe_x nanocrystals embedded in a borosilicate matrix is studied. The observed blue shift of the absorption edge and bleaching of the confinement-related features in the spectra are related to X-ray induced negative ionization of the nanocrystals with charge transfer across the nanocrystal/matrix interface. The radiation-induced changes are observed to recover after longer post-irradiation storage at room temperature.