等离子体子
材料科学
光探测
光热治疗
表面等离子共振
红外线的
光电探测器
纳米技术
光电子学
吸收(声学)
纳米颗粒
光学
物理
复合材料
作者
Zhengfeng Zhu,Yousheng Zou,Weida Hu,Yuebin Li,Yu Gu,Bingqiang Cao,Nan Guo,Lin Wang,Jizhong Song,Shengli Zhang,Haoshuang Gu,Haibo Zeng
标识
DOI:10.1002/adfm.201504884
摘要
Localized surface plasmon resonance (LSPR) has many applications which require meeting specific wavelength windows. The most prominent examples are photothermal therapy in biology, matched to the biological window (650–1350 nm), and communication relying on photodetection in optoelectronics, matched to the communication window (1260–1675 nm). However, for the classic noble metals (Au, Ag), tuning LSPRs from visible region to these two windows is still a demanding task due to their intrinsic limitations on charge density and dielectric function. Here, the discovery of near‐infrared biological and communication window‐matched plasmonic properties of semimetal TiS 2 nanosheets (NSs) is reported for the first time. Developed synthesis procedures allow fine‐tuning width and thickness of single‐crystal TiS 2 NSs. During characterization a new and intensive absorption peak in the 1000–1400 nm range is observed from both TiS 2 NS colloid solutions and films. This peak is attributed to LSPR due to its dependence on particle shape and on the refractive index of solvents. The superiority of such LSPRs is demonstrated in both, biological and optical applications: excitation at 808 and 980 nm generates a ≈50 °C photothermal temperature rise, while excitation at 1310 nm results in two‐times enhanced photocurrents of PbS photodetectors compared to untreated devices.
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