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

论文摘要

We present a self-assembly method to prepare array nano-wires of colloidal CdSe quantum dots on a substrate of porous Al2O3 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 Al2O3 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 Al2O3 film. Compared with the area of nonself-assembled nano-wire, the fluorescence on the Al2O3/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.

论文目录

  • 1. Introduction
  • 2. Experiments
  • 3. Results and discussion
  • 4. Conclusions

    • 文章来源

    类型: 期刊论文

    作者: 张欣,邵丽萍,彭嫚,白忠臣,张正平,秦水介

    来源: Chinese Physics B 2019年06期

    年度: 2019

    分类: 基础科学,工程科技Ⅰ辑

    专业: 化学,材料科学

    单位: College of Big Data and Information Engineering, Guizhou University,Guizhou Province Key Laboratory for Photoelectric Technology and Application, Guizhou University,College of Medicine, Guizhou University

    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)

    分类号: O657.3;O614.242;TB383.1

    页码: 429-432

    总页数: 4

    文件大小: 398K

    下载量: 16

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