纳米棒
光热治疗
材料科学
介孔二氧化硅
介孔材料
表面等离子共振
等离子体子
吸收(声学)
纳米技术
激光器
光热效应
光电子学
纳米颗粒
化学
光学
催化作用
复合材料
物理
生物化学
作者
Dai Yu,Guansong He,Long Sheng,Xin Li,Meng Li,Peng Wang,Xiaodong Li,Zhijian Yang
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2023-03-15
卷期号:6 (6): 4946-4956
被引量:8
标识
DOI:10.1021/acsanm.3c00714
摘要
The plasmon-induced photothermal effect is often regarded as one of the most intriguing features of Au nanorods (AuNRs). The spectral matching of absorption and excitation determines the optical absorption quantity and the photothermal conversion efficiency, which is essential for practical applications. Although the dimensional tunability of monodisperse AuNRs has already been accessible, the fine-tuning of AuNRs with longitudinal surface plasmon resonance (LSPR) at a desired wavelength to match the excitation is still challenging because of inferior reproducibility and synthetic complexity. In this work, using hydroquinone as both a cosurfactant and a reductant, we propose a synthetic strategy toward AuNRs with excellent linear tunability of LSPR peaks from 530 to 1200 nm via simply altering the dosage of silver nitrate. Given that the laser wavelength for ignition is 1064 nm, the LSPR wavelength of AuNRs could be exactly controlled at 1064 nm for maximum photothermal performance. Afterward, the as-prepared AuNRs were coated with a dendritic mesoporous silica shell for plasmonic stability and loading explosive molecules. As a proof of concept, the laser ignitability could be achieved only in the presence of AuNRs with LSPR wavelength approaching 1064 nm, highlighting the importance of spectral matching in photothermal conversion-assisted laser ignition.
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