Open AccessPlasmonic Microcantilever with Remarkably Enhanced Photothermal Responses
Author(s) -
Naikun Gao,
Dongfang Zhao,
Ran Jia,
Dongdong Zhang,
Duo Liu
Publication year - 2017
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/s41598-017-05080-y
Subject(s) - photothermal therapy , plasmon , materials science , surface plasmon resonance , nanostructure , excitation , nanotechnology , excitation wavelength , photothermal effect , nanoparticle , optoelectronics , plasmonic nanoparticles , wavelength , surface plasmon , physics , quantum mechanics
Plasmonic nanostructures exhibit abundant optoelectronic properties. We explore here the technological potentials of plasmonic nanostructures as active component to actuate microcantilever sensors. We find that the photothermal excitation of microcantilevers can be greatly enhanced by Au nanoparticle (NPs). A detailed investigation reveals that the enhancement is wavelength dependent and can be attributed to selective excitation of localized surface plasmon resonance (LSPR). The associated effects are discussed based on a thorough examination of the geometric aspects of Au NPs, microcantilever lengths, and incident optical power. Some technological advantages offered by this method are also discussed.