尺寸小且光学性能良好的长余辉纳米颗粒(PLNPs)在生物医学领域中具有广泛的应用前景。目前,PLNPs一般需要通过高温煅烧获得,而高温煅烧会造成颗粒团聚、尺寸过大、不利于在生物医学领域应用。因此,发展尺寸小且余辉发光性能良好的PLNPs制备方法具有重要意义。采用溶剂热法,以油酸和十八烯为溶剂,甲醇(CH3OH)为辅助溶剂制备了铬掺杂镓酸锌PLNPs(ZGC-CH3OH),对ZGC-CH3OH煅烧后进一步用乙二胺四乙酸二钠进行刻蚀获得ZGC-CH3OH-EDTA。研究了CH3OH和EDTA刻蚀效应对PLNPs尺寸大小、余辉发光性能以及晶体结构的影响。结果表明:该方法制备的PLNPs(ZGC-CH3OH-EDTA)不仅尺寸小,而且具有很长的余辉时间,其平均粒径为11.12nm,最大余辉发射波长为696nm,NIR余辉时间超过120h。
Persistent luminescence nanoparticles (PLNPs) with small size and good optical properties are promising for a wide range of applications in biomedical fields.So far,PLNPs are generally obtained by high-temperature calcination,but the calcination causes particle agglomeration and large size,which is unfavorable for biomedical applications.Therefore,it is significant to develop a preparation method for PLNPs with small size and high afterglow luminescence properties.In this paper,the chromium-doped zinc gallate (ZGC-CH3OH) PLNPs were prepared by solvothermal method using oleic acid and octadecene as solvents and methanol as auxiliary solvents.Further,ZGC-CH3OH-EDTA was obtained after etching of ZGC-CH3OH with disodium ethylenediamine tetraacetate acid.The effects of methanol and EDTA etching on the particle sizes,the luminescence properties,and the crystal structure of the PLNPs were investigated.The results showed that the ZGC-CH3OH-EDTA PLNPs prepared by this method not only had small size with an average particle size of 11.12nm,but also had a long afterglow time with a maximum afterglow emission wavelength of 696 nm and a NIR afterglow time of more than 120h.
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基金资助
新疆维吾尔自治区高校科研计划资助项目(XJEDU2018I017);新疆维吾尔自治区自然科学基金资助项目(2022D01E16)
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