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【答案】应助回帖
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超级老快: 金币+60, 翻译EPI+1, ★★★很有帮助 2016-11-29 11:45:34
1.直到现在，有非常多的方法尝试着去增强上转换发光信号，比如控制上转换纳米颗粒的尺寸、结构和表面基团；选择最优的基质和掺杂稀土；设计核壳结构；有机天线；和表面等离子体的调制。通过贵金属纳米结构材料的表面等离子体调(SP)制被认为是提高上转换纳米颗粒发光强度最有效的方法。
Up to this point, there has been many approaches to enhance the signal intensity of upper-conversion, For example, by control the sizes, structure and surface properties of upper-conversion nanoparticles, choi=osing the right matrix (or support), Doping with rare earth, designing core-shell structures, adding antennas containing organic dyes, combinations with surface plasmon, to name a few. The combined use of noble metal nano structured materials with surface plasmon properties is considered one of the most effective method to enhance the emission intensity of upper-conversion nanoparticles.
2.众所周知，等离子体纳米结构可以把入射光聚集在靠近纳米结构表面（2-10 纳米）的亚波长范围内的强的局域电场，使局域电场增强两个数量级以上，金属表面的等离子体共振电场的放大，其与荧光纳米材料的偶极子产生振荡耦合而是荧光增强。
It is well known that plasmonic metal nanostructures can focus and redirect the incoming light some 2-10 nm into a space near their surface, where a strong local electric field is present within a subwavelength radius, which enhances the local electric field by about two orders of magnitude. The amplification effects of surface plasmon resonance electric field from the metal, together with the dipole oscillation coupling from the fluorescence nanomaterials results in an enhanced fluorescence intensity. |
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