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分别采用水热法制备EuF3与NaYF4纳米晶,与N-异丙基丙烯酰胺(NIPAm)混合后进行自由基聚合,一步法合成EuF3-NaYF4纳米晶/聚N-异丙基丙烯酰胺(PNIPAm)三元复合凝胶.对纳米晶与复合凝胶的结构与荧光性能进行了表征.重点研究了三元复合凝胶的荧光温敏行为,并对其影响机制进行了探讨.结果表明,EuF3与NaYF4纳米晶在PNIPAm凝胶基体中的体相掺杂,同样产生了明显的能量传递.两种纳米晶相对含量的变化,对复合凝胶的荧光温敏性能有重要影响.
EuF3 and NaYF4 nanocrystals were prepared by hydrothermal method and mixed with N-isopropylacrylamide (NIPAm) respectively for free radical polymerization. EuF3-NaYF4 nanocrystals / poly-N-isopropylacrylamide (PNIPAm) Ternary composite gel.The structures and fluorescence properties of nanocrystals and composite gels were characterized.The fluorescence thermo-sensitive behavior of ternary composite gels was investigated and the mechanism of their fluorescence was discussed.The results showed that EuF3 and The bulk phase doping of NaYF4 nanocrystals in PNIPAm gel matrix also produces significant energy transfer.The relative content of the two nanocrystals has an important influence on the fluorescence thermo-sensitivity of the composite gel.