TY - JOUR
T1 - Morphological and optical evolution of metallic oxide/Au nanoparticle hybrid thin film
T2 - High absorption and reflectance by plasmonic enhancement
AU - Mao, Sui
AU - Liu, Jiliang
AU - Pan, Yuyong
AU - Lee, Jihoon
AU - Yao, Zhao
AU - Pandey, Puran
AU - Kunwar, Sundar
AU - Zhu, Zhijun
AU - Shen, Wenfei
AU - Belfiore, Laurence A.
AU - Tang, Jianguo
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/11/30
Y1 - 2019/11/30
N2 - Hybrid metal-oxide (MO)/metal nanostructures (MNSs) have been appealing in widespread optoelectronic devices due to their strong and tunable plasmonic activity encompassing selective scattering and absorption of wavelength depending upon the surface morphology and surrounding dielectric environment. In this paper, the various MO/Au NSs hybrid thin-films are fabricated via the solid-state-dewetting growth of Au NSs and sol-gel deposition of MO top-layers including ZrOx, CeOx, YOx and AlOx. Over 450% enhancements in maximum absorption are observed along with the peak redshift of 168 nm for the series of MO/Au NS films. The overall plasmonic properties undergo three regimes by the systematical control of film morphology: (I) Rapid enhancement, (II) Slow enhancement and (III) Decay. The optical evolution is correspondingly investigated with the assistant of finite-different time-domain (FDTD) calculation. This work may give an aid to the photo-electronic applications, such as photovoltaics, sensing and surface enhanced Raman scattering, based on hybrid MNSs especially on control of their plasmonic properties.
AB - Hybrid metal-oxide (MO)/metal nanostructures (MNSs) have been appealing in widespread optoelectronic devices due to their strong and tunable plasmonic activity encompassing selective scattering and absorption of wavelength depending upon the surface morphology and surrounding dielectric environment. In this paper, the various MO/Au NSs hybrid thin-films are fabricated via the solid-state-dewetting growth of Au NSs and sol-gel deposition of MO top-layers including ZrOx, CeOx, YOx and AlOx. Over 450% enhancements in maximum absorption are observed along with the peak redshift of 168 nm for the series of MO/Au NS films. The overall plasmonic properties undergo three regimes by the systematical control of film morphology: (I) Rapid enhancement, (II) Slow enhancement and (III) Decay. The optical evolution is correspondingly investigated with the assistant of finite-different time-domain (FDTD) calculation. This work may give an aid to the photo-electronic applications, such as photovoltaics, sensing and surface enhanced Raman scattering, based on hybrid MNSs especially on control of their plasmonic properties.
KW - Au nanoparticles
KW - Hybrid films/coatings
KW - Metallic oxides
KW - Plasmon enhancement
KW - Thin-film interference
UR - http://www.scopus.com/inward/record.url?scp=85070304922&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2019.143575
DO - 10.1016/j.apsusc.2019.143575
M3 - Article
AN - SCOPUS:85070304922
SN - 0169-4332
VL - 495
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 143575
ER -