以稀土离子、油酸、间氯过氧苯甲酸和mPEG等为原料合成了一种新型水溶性NaLaF4:12％Yb3+,3％Er3+(摩尔分数)稀土上转换纳米颗粒(mPEG-UCNPs).利用核磁共振谱、红外光谱、原子力显微镜、透射电子显微镜、分子荧光光谱等手段对mPEG-UCNPs的结构进行了表征.结果表明:mPEG-UCNPs粒径较为均一,粒径均在15～25 nm之间;同时,mPEG-UCNPs在510 ～580 nm和635 ～ 700 nm有较好的上转换荧光性质.
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