CAJ | 학술논문

采用微波法合成银纳米颗粒,通过化学自组装技术将银纳米颗粒吸附在玻璃基片上,制备了银纳米颗粒的局域表面等离子体传感器.在纯水中,紫外可见光消光谱表明局域表面等离子体共振位于428 nm处.随外界折射率增加,共振峰发生红移,其折射率灵敏度达到(173±6) nm/RIU.在350℃温度下退火处理后,改变银颗粒在基片上的形貌,峰位发生约65 nm的红移,灵敏度下降约20%.理论分析表明,银纳米颗粒形状和基底的相互作用影响折射率传感的波长响应和灵敏度特性.
채용미파법합성은납미과립,통과화학자조장기술장은납미과립흡부재파리기편상,제비료은납미과립적국역표면등리자체전감기.재순수중,자외가견광소광보표명국역표면등리자체공진위우428 nm처.수외계절사솔증가,공진봉발생홍이,기절사솔령민도체도(173±6) nm/RIU.재350℃온도하퇴화처리후,개변은과립재기편상적형모,봉위발생약65 nm적홍이,령민도하강약20%.이론분석표명,은납미과립형상화기저적상호작용영향절사솔전감적파장향응화령민도특성.
Ag nanoparticles are prepared by microwave synthesizing method and absorbed on the glass slide by self-assembling technology. Thus, the localized surface plasmon resonant (LSPR) sensor is developed. UV-vis absorption spectrum shows that its LSPR peak is located at 428nm in pure water. The LSPR peak takes red shift when the refractive index of surrounding solution increases, and the sensitivity can arrive at (173±6) nm/RIU. After annealing at 350℃, the shape of Ag nanoparticles on the glass slide is changed. The LSPR peak shifts about 65 nm towards longer wavelength, and the sensitivity decreases with 20%. Theoretical analysis indicates that shape and substrate take important effect on the response of wavelength and the sensitivity for the refractive index sensor of Ag nanoparticles.