有序Ag_(NW)@Au_(NP)复合纳米线的制备及其对聚(3-己基噻吩)荧光效应的影响

采用三相界面法及置换反应法,以氯金酸-乙醇溶液和无序Ag纳米线为原材料,在空白Si基底上成功制备出有序Ag纳米线(Ag_(NW))@Au纳米颗粒(Au_(NP))复合纳米线。采用场发射扫描电子显微镜(FESEM)和高分辨透射电子显微镜(HRTEM)对有序Ag_(NW)@Au_(NP)复合纳米线形貌进行了表征与分析,研究了氯金酸-乙醇溶液浓度和置换反应的反应时间对制备Ag_(NW)@Au_(NP)复合纳米线的影响,并且结合荧光光谱及激光拉曼光谱进一步研究了一系列有序Ag_(NW)@Au_(NP)复合纳米线对共轭聚合物聚(3-己基噻吩)(P3HT)荧光效应的影响。实验结果表明,有序Ag_(NW)@Au_(NP)复合纳米线上Au_(NP)的粒径随着置换反应时间的延长或氯金酸-乙醇溶液浓度的增加而增大,该复合纳米线对P3HT的荧光效应有增强作用,但其增强效应会随置换反应进行而减弱。

Preparation of ordered AgNW@AuNP hybrid nanowires and their influences on fluorescence properties of poly(3-hexylthiophene)

Ordered Ag nanowires(AgNW )@Au nanoparticles(AuNP )hybrid nanowires were synthesized on bare Si substrate using AgNW-water solution and HAuCl4-ethanol solution by three-phase-interface method and galvanic dis-placement reaction.Field emission SEM (FESEM)and high resolution TEM (HRTEM)were employed to analyze the influence of HAuCl4-ethanol concentration and reaction time of galvanic displacement reaction on the morphology of the hybrid nanowires.Fluorescence spectra and laser-Raman spectra were carried out to analyze the influence of various ordered AgNW @AuNP hybrid nanowires on the fluorescence properties of conjugated polymer poly(3-hexyl-thiophene)(P3 HT).The results show that the AuNP particle sizes of ordered AgNW @ AuNP hybrid nanowires in-crease when the reaction time or the concentration of HAuCl4-ethanol solution increases.The fluorescence properties of P3 HT films are improved on various ordered AgNW @AuNP hybrid nanowires compared with those on bare silicon substrate,but the fluorescence intensity of P3 HT films on the ordered hybrid nanowires decreases as the galvanic displacement process.