张鑫博1，丛龙壮1，杨兰兰1，杜中林1，王 瑶1，王彦欣1，黄林军1，高 梵1，Laurence A. Belfiore2，唐建国1*
1. 青岛大学杂化材料研究院，国家杂化材料技术国际联合研究中心，国际杂化材料科技国家合作基地，山东 青岛 266071
2. Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, Colorado 80523, USA
Optimal Fluorescence Property of CdSe Quantum Dots and Electrospinning Polyvinylpyrrolidone Hybrid Microfibers
ZHANG Xin-bo1, CONG Long-zhuang1, YANG Lan-lan1, DU Zhong-lin1, WANG Yao1, WANG Yan-xin1, HUANG Lin-jun1, GAO Fan1, Laurence A. Belfiore2, TANG Jian-guo1*
1. Institute of Hybrid Materials, National Center of International Joint Research for Hybrid Materials Technology, National Base of International Sci. & Tech. Cooperation on Hybrid Materials, Qingdao University, Qingdao 266071, China
2. Department of Chemical and Biological Engineering, Colorado State University, Fort Collins, Colorado 80523, USA
Abstract：Semiconductor nanocrystals (NCs) have been widely researched and reported in the past few years due to their excellent light stability, wide emission persistence and high extinction coefficient. Among them, CdSe NCs are widely used in electronic lighting, solar power generation, photoelectric sensing and other fields. However, the electrical, thermodynamic and photophysical properties of CdSe NCs have a size dependence, crystal surface defects and dangling bonds, and serious biological and environmental toxicity are prone to occur in traditional preparation methods applications, which limit their direct application. To realize the application of quantum dots in various fields, the emission wavelength, size distribution and fluorescence properties of CdSe NCs must be strictly controlled. In this study, monodisperse colloidal luminescent CdSe quantum dots were synthesized by high-temperature thermal injection method, and CdSe NCs were modified with surface ligands, and the effects of ligands with different alkyl chain lengths on the size distribution and fluorescence properties of CdSe NCs were studied. In addition, the spinning solution was prepared by changing the solvent ratio and hybridized with polyvinylpyrrolidone (PVP) to prepare PVP/CdSe QDs hybrid fibers. The results show that the CdSe NCs modified by surface ligands have good stability in the organic solution due to the decrease of intermolecular adsorption the modification of surface ligands, as well as adjustable solubility, which compensate for defects and dangling bonds caused by the decline in fluorescence performance, and play an important regulatory role in the formation of CdSe crystal structure. More importantly, this study combines surface ligand modification and hybridization to improve the adhesion of surface ligands and avoid direct contact between cadmium selenide nanocrystals and the polymer matrix during the preparation of hybrid materials. The fluorophore provides a good microenvironment and ensures the fluorescence performance of CdSe NCs, and the hybrid fiber also has stable fluorescence performance. The introduction of PVP has reduced the biotoxicity and environmental toxicity of CdSe NCs, made the material more environmentally friendly has better biocompatibility, and greatly increased the material’s application range. The experimental results show that PVP/CdSe QDs hybrid microfibers have good hybrid compatibility and dispersion, excellent fluorescence performance and material formability, simple synthesis ways and low cost, and applied to solution processing, optical lighting, Electrode materials, and biological imaging and other fields.
基金资助: National Natural Science Foundation of China (51473082), State Key Project of International Cooperation Research (2017YFE0108300, 2016YFE0110800)，The Program for Introducing Talents of Discipline to Universities (“111” plan)，the 1st class disciplines of Shandong Province，The double hundred foreign expert project of Shandong Province，1st class discipline program of Materials Science of Shandong Province
通讯作者:
唐建国
E-mail: tang@qdu.edu.cn
作者简介: ZHANG Xin-bo，（1995—），master degree candidate of Qingdao University e-mail：znpt95@gmail.com
引用本文:
张鑫博，丛龙壮，杨兰兰，杜中林，王 瑶，王彦欣，黄林军，高 梵，Laurence A. Belfiore，唐建国. CdSe量子点的光物理性质研究与荧光杂化纤维的制备[J]. 光谱学与光谱分析, 2021, 41(03): 990-996.
ZHANG Xin-bo, CONG Long-zhuang, YANG Lan-lan, DU Zhong-lin, WANG Yao, WANG Yan-xin, HUANG Lin-jun, GAO Fan, Laurence A. Belfiore, TANG Jian-guo. Optimal Fluorescence Property of CdSe Quantum Dots and Electrospinning Polyvinylpyrrolidone Hybrid Microfibers. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(03): 990-996.
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