基于配体调控技术制备荧光发射可视化分离的CdSe纳米晶体  

Synthesis of visual fluorescence emission CdSe nanocrystals based on ligand regulation

作　　者：李自娟[1] 吕萱 陈娇娇 赵海洋 孙朔 张志武 张健龙 马燕玲 李洁[1] 冯子贤 刘佳辉 LI Zijuan;LÜXuan;CHEN Jiaojiao;ZHAO Haiyang;SUN Shuo;ZHANG Zhiwu;ZHANG Jianlong;MA Yanling;LI Jie;FENG Zixian;LIU Jiahui(Zhangjiakou Cigarette Factory Co.,Ltd.,Zhangjiakou,Hebei 075000,China;College of Chemical Engineering and Materials Science,Tianjin University of Science&Technology,Tianjin 300457,China)

机构地区：[1]张家口卷烟厂有限责任公司,张家口075000 [2]天津科技大学化工与材料学院,天津300457

出　　处：《无机化学学报》2025年第2期308-320,共13页Chinese Journal of Inorganic Chemistry

基　　金：河北中烟科技项目(No.HBZY2023A024)资助。

摘　　要：研究了不同油酸(OA)、油胺(OLA)配体添加量在制备CdSe纳米晶体中对量子点荧光特性的影响,深入分析了OA和OLA配体在CdSe纳米晶体生长过程中的作用机理。在采用逐层生长法制备CdSe纳米晶体时,研究了OA和OLA配体对晶体尺寸及尺寸分布的影响,并制备了尺寸分布良好的较大尺寸CdSe纳米晶体。采用多种方法对CdSe纳米晶体的光学性能、晶体结构、微观形貌及尺寸分布进行表征分析。结果表明,OA配体的添加会使CdSe纳米晶体发射峰红移,且添加量与发射峰红移波长呈正相关,发射峰可调范围为548.5~604.0 nm;OLA配体添加量较少时会使CdSe纳米晶体发射峰蓝移,但随着OLA配体添加量的增加发射峰逐渐红移,发射峰可调范围为548.0~584.4 nm;在逐层生长法中引入OA和OLA配体可有效改善由于多次逐层生长而产生的发射峰双峰现象。最终通过调整制备工艺,制备了荧光发射可视化分离的4种CdSe纳米晶体,其尺寸分布良好,具有较高的光致发光量子产率(PLQY),抗光漂白性能较好。The effects of oleic acid(OA)and oleylamine(OLA)ligand additions on the fluorescence properties of CdSe nanocrystals were investigated,and the mechanisms of OA and OLA ligands in the growth process of CdSe nanocrystals were analyzed in depth.The optical properties,crystal structure,micro-morphology,and size distribution of CdSe nanocrystals were characterized and analyzed using various characterization methods.The results indicate that the emission peak of the CdSe nanocrystal underwent a red shift upon the addition of OA ligands,and the magnitude of the shift was directly proportional to the number of ligands added.The emission peak of CdSe nanocrystal can be adjusted within the range of 548.5-604.0 nm.When a small amount of OLA ligand was added,the peak shifted towards blue.However,with an increase in the amount of OLA ligand,the peak gradually shifted towards red,with an adjustable range of 548.0-584.4 nm.The layer-by-layer growth method,with the introduction of OA and OLA ligands,can effectively improve the bimodal emission peak phenomenon caused by multiple layer-bylayer growth.Finally,by adjusting the preparation process,four CdSe nanocrystals with fluorescence emission visualization separation were prepared with good size distribution,high photoluminescence quantum yield(PLQY)and excellent resistance to photobleaching.

关 键 词：CdSe纳米晶体 配体调控 逐层生长法 油酸 油胺 

分 类 号：TB383[一般工业技术—材料科学与工程] O614.242[理学—无机化学] O613.52[理学—化学]