中国物理B ›› 2018, Vol. 27 ›› Issue (10): 107403-107403.doi: 10.1088/1674-1056/27/10/107403

所属专题: TOPICAL REVIEW — Nanophotonics

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Ultrasensitive nanosensors based on localized surface plasmon resonances: From theory to applications

Wen Chen(陈文), Huatian Hu(胡华天), Wei Jiang(姜巍), Yuhao Xu(徐宇浩), Shunping Zhang(张顺平), Hongxing Xu(徐红星)   

  1. 1 School of Physics and Technology, Center for Nanoscience and Nanotechnology, and Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, China;
    2 The Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
  • 收稿日期:2018-07-05 修回日期:2018-08-24 出版日期:2018-10-05 发布日期:2018-10-05
  • 通讯作者: Shunping Zhang, Hongxing Xu E-mail:spzhang@whu.edu.cn;hxxu@whu.edu.cn
  • 基金资助:

    Project supported by the National Key Basic Research Program (Grant No. 2015CB932400), the National Key Research and Development Program of China (Grant Nos. 2017YFA0205800 and 2017YFA0303504), and the National Natural Science Foundation of China (Grant Nos. 11674255 and 11674256).

Ultrasensitive nanosensors based on localized surface plasmon resonances: From theory to applications

Wen Chen(陈文)1, Huatian Hu(胡华天)2, Wei Jiang(姜巍)1, Yuhao Xu(徐宇浩)1, Shunping Zhang(张顺平)1, Hongxing Xu(徐红星)1,2   

  1. 1 School of Physics and Technology, Center for Nanoscience and Nanotechnology, and Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, China;
    2 The Institute for Advanced Studies, Wuhan University, Wuhan 430072, China
  • Received:2018-07-05 Revised:2018-08-24 Online:2018-10-05 Published:2018-10-05
  • Contact: Shunping Zhang, Hongxing Xu E-mail:spzhang@whu.edu.cn;hxxu@whu.edu.cn
  • Supported by:

    Project supported by the National Key Basic Research Program (Grant No. 2015CB932400), the National Key Research and Development Program of China (Grant Nos. 2017YFA0205800 and 2017YFA0303504), and the National Natural Science Foundation of China (Grant Nos. 11674255 and 11674256).

摘要:

The subwavelength confinement feature of localized surface plasmon resonance (LSPR) allows plasmonic nanostructures to be functionalized as powerful platforms for detecting various molecular analytes as well as weak processes with nanoscale spatial resolution. One of the main goals of this field of research is to lower the absolute limit-of-detection (LOD) of LSPR-based sensors. This involves the improvement of (i) the figure-of-merit associated with structural parameters such as the size, shape and interparticle arrangement and, (ii) the spectral resolution. The latter involves advanced target identification and noise reduction techniques. By highlighting the strategies for improving the LOD, this review introduces the fundamental principles and recent progress of LSPR sensing based on different schemes including 1) refractometric sensing realized by observing target-induced refractive index changes, 2) plasmon rulers based on target-induced relative displacement of coupled plasmonic structures, 3) other relevant LSPR-based sensing schemes including chiral plasmonics, nanoparticle growth, and optomechanics. The ultimate LOD and the future trends of these LSPR-based sensing are also discussed.

关键词: plasmonic sensing, localized surface plasmon resonance, plasmon rulers, nanoparticles

Abstract:

The subwavelength confinement feature of localized surface plasmon resonance (LSPR) allows plasmonic nanostructures to be functionalized as powerful platforms for detecting various molecular analytes as well as weak processes with nanoscale spatial resolution. One of the main goals of this field of research is to lower the absolute limit-of-detection (LOD) of LSPR-based sensors. This involves the improvement of (i) the figure-of-merit associated with structural parameters such as the size, shape and interparticle arrangement and, (ii) the spectral resolution. The latter involves advanced target identification and noise reduction techniques. By highlighting the strategies for improving the LOD, this review introduces the fundamental principles and recent progress of LSPR sensing based on different schemes including 1) refractometric sensing realized by observing target-induced refractive index changes, 2) plasmon rulers based on target-induced relative displacement of coupled plasmonic structures, 3) other relevant LSPR-based sensing schemes including chiral plasmonics, nanoparticle growth, and optomechanics. The ultimate LOD and the future trends of these LSPR-based sensing are also discussed.

Key words: plasmonic sensing, localized surface plasmon resonance, plasmon rulers, nanoparticles

中图分类号:  (Raman and optical spectroscopy)

  • 74.25.nd
73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)