Anker JN, Hall WP, Lyandres O, Shah NC, Zhao J, Van Duyne RP
摘 要
Recent developments have greatly improved the sensitivity of optical sensors based on metal
nanoparticle arrays and single nanoparticles. We introduce the localized surface plasmon resonance
(LSPR) sensor and describe how its exquisite sensitivity to size, shape and environment can be
harnessed to detect molecular binding events and changes in molecular conformation. We then
describe recent progress in three areas representing the most significant challenges: pushing
sensitivity towards the single-molecule detection limit, combining LSPR with complementary molecular
identification techniques such as surface-enhanced Raman spectroscopy, and practical development
of sensors and instrumentation for routine use and high-throughput detection. This review highlights
several exceptionally promising research directions and discusses how diverse applications of
plasmonic nanoparticles can be integrated in the near future.