摘要
以柠檬酸、尿素和丙烯腈为原料,乙醇为溶剂,通过一步溶剂热法制备了氮掺杂碳化聚合物点(NCPDs),其粒径分布范围约为12~22 nm.NCPDs粉末不仅可发射黄色荧光(λem=570 nm),而且荧光强度和发射峰位置具有显著的浓度依赖性.将NCPDs分散在硅溶胶中制备成NCPDs质量分数为0.15%~45%的NCPDs/硅溶胶复合薄膜,该复合材料的固态荧光发射波长随NCPDs的浓度增加逐渐从蓝色红移至红色(453~638 nm),且具有良好的稳定性.将NCPDs应用于发光二极管(LEDs),可构建蓝光到红光的多色LEDs.此外,NCPDs优异的固态荧光性能使其在指纹识别领域展示出潜在的应用前景,因此评估了其在指纹识别中的适用性.
Nitrogen-doped carbonized polymer dots(NCPDs)were prepared by one-step solvothermal method using citric acid,urea and acrylonitrile as raw materials,and ethanol as solvent.The particle size of NCPDs is about 12—22 nm.NCPDs powder not only can emit yellow fluorescence(λem=570 nm),but also has excellent concentra-tion-dependent fluorescence.Therefore,the NCPDs/silica sol composite films with different NCPDs mass fraction from 0.15%to 45%were prepared by dispersing NCPDs in silica sol,and the solid-state fluorescence emission wavelengths of these composites gradually shift from blue to red region(453—638 nm)with the increase of NCPDs concentration.Forthermore,those NCPDs composites have good fluorescence stability.The NCPDs composites were further applied to construct light emitting diodes(LEDs),and multicolor LEDs from blue light to red light can be obtained.In addition,the excellent solid-state fluorescence properties of NCPDs make them show potential application prospects in the field of fingerprint recognition,so their applicability in fingerprint recognition was also evaluated.
作者
金鹏
赵刘曦
王巍
孙争光
马会娟
詹园
JIN Peng;ZHAO Liuxi;WANG Wei;SUN Zhengguang;MA Huijuan;ZHAN Yuan(Key Laboratory of Polymer Materials Hubei Provincial Key Laboratory,Functional Materials Green Preparation and Application Key Laboratory of the Ministry of Education,College of Materials Science and Engineering,Hubei University,Wuhan 430062,China;Hubei Three Gorges Laboratory,Yichang 443007,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2024年第8期140-147,共8页
Chemical Journal of Chinese Universities
基金
湖北三峡实验室开放课题项目(批准号:SK232014)资助.
关键词
碳化聚合物点
氮掺杂
固态荧光
多色发光二极管
指纹识别
Carbonized polymer dots
Nitrogen doping
Solid-state fluorescence
Multicolor light emitting diodes
Fingerprinting
