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Fluorescence spectra of colloidal self-assembled CdSe nano-wire on substrate of porous Al2O3/Au nanoparticles

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摘要 We present a self-assembly method to prepare array nano-wires of colloidal CdSe quantum dots on a substrate of porous Al2 O3 film modified by gold nanoparticles. The photoluminescence(PL) spectra of nanowires are in situ measured by using a scanning near-field optical microscopy(SNOM) probe tip with 100-nm aperture on the scanning near-field optical microscope. The results show that the binding sites from the edge of porous Al2 O3 nanopores are combined with the carboxyl of CdSe quantum dots’ surface to form an array of CdSe nanowires in the process of losing background solvent because of the gold nanoparticles filling the nano-holes of porous Al2 O3 film. Compared with the area of nonself-assembled nano-wire, the fluorescence on the Al2 O3/Au/CdSe interface is significantly enhanced in the self-assembly nano-wire regions due to the electron transfer conductor effect of the gold nanoparticles’ surface. In addition, its full width at half maximum(FWHM) is also obviously widened. The method of enhancing fluorescence and energy transfer can widely be applied to photodetector, photocatalysis, optical display, optical sensing, and biomedical imaging, and so on.
作者 张欣 邵丽萍 彭嫚 白忠臣 张正平 秦水介 Xin Zhang;Li-Ping Shao;Man Peng;Zhong-Chen Bai;Zheng-Ping Zhang;Shui-Jie Qin(不详)
出处 《中国物理B:英文版》 SCIE EI CAS CSCD 2019年第6期429-432,共4页 Chinese Physics B
基金 Project supported by the National Natural Science Foundation of China(Grant Nos.61741505 and 61865002) the Guizhou Provincial Science and Technology Support Plan,China(Grant No QKHZ[2017]2887) the Guiding Local Science and Technology Development Plan of the Central Government of China(Grant No.QKZYD[2017]4004) the Guizhou Province Education and Teaching Reform for Graduate Student(Grant No.QJYH-JG[2016]15) the Guizhou University Introduces Talent Projects,China(Grant No.2016002) the Talents of Guizhou Municipal Science and Technology Cooperation Platform,China(Grant No.[2018]5781).
作者简介 Corresponding author:E-mail:Zhong-Chen Bai,zcbai@gzu.edu.cn
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