TY - JOUR
T1 - Gas-Aggregated Copper Nanoparticles with Long-term Plasmon Resonance Stability
AU - Popok, Vladimir N.
AU - Novikov, Sergey M.
AU - Lebedinskij, Yurij Yu
AU - Markeev, Andrey M.
AU - Andreev, Aleksandr A.
AU - Trunkin, Igor N.
AU - Arsenin, Aleksey V.
AU - Volkov, Valentyn S.
N1 - Funding Information:
S.M.N., A.V.A., and V.S.V. acknowledge financial support from the Russian Science Foundation (grant number 18-79-10208).
Publisher Copyright:
© 2020, Springer Science+Business Media, LLC, part of Springer Nature.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2021/3
Y1 - 2021/3
N2 - Metal nanoparticles (NPs) possessing localized surface plasmon resonance (LSPR) are of high interest for applications in optics, electronics, catalysis, and sensing. The practically important issue is the stability of the LSPR, which often limits the use of some metals due to their chemical reactivity leading to degradation of the NP functionality. In this work, copper NPs of two distinct sizes are produced by magnetron sputtering gas aggregation. This method ensures formation of the particles with high purity and monocrystallinity, enhancing the chemical inertness and providing a superior time stability of the plasmonic properties. Additionally, a simple UV-ozone treatment, which leads to the formation of an oxide shell around the copper NPs, is found to be an efficient method to prevent following gradual oxidation and assure the LSPR stability in ambient atmospheric conditions for periods over 100 days even for small (10–12 nm in diameter) NPs. The obtained results allow for significant improvement of the competitiveness of copper NPs with gold or silver nanostructures, which are traditionally used in plasmonics.
AB - Metal nanoparticles (NPs) possessing localized surface plasmon resonance (LSPR) are of high interest for applications in optics, electronics, catalysis, and sensing. The practically important issue is the stability of the LSPR, which often limits the use of some metals due to their chemical reactivity leading to degradation of the NP functionality. In this work, copper NPs of two distinct sizes are produced by magnetron sputtering gas aggregation. This method ensures formation of the particles with high purity and monocrystallinity, enhancing the chemical inertness and providing a superior time stability of the plasmonic properties. Additionally, a simple UV-ozone treatment, which leads to the formation of an oxide shell around the copper NPs, is found to be an efficient method to prevent following gradual oxidation and assure the LSPR stability in ambient atmospheric conditions for periods over 100 days even for small (10–12 nm in diameter) NPs. The obtained results allow for significant improvement of the competitiveness of copper NPs with gold or silver nanostructures, which are traditionally used in plasmonics.
KW - Copper nanoparticles
KW - Copper oxidation
KW - Gas aggregation nanoparticle formation
KW - Localized surface plasmon resonance
U2 - 10.1007/s11468-020-01287-4
DO - 10.1007/s11468-020-01287-4
M3 - Journal article
AN - SCOPUS:85091109395
SN - 1557-1955
VL - 16
SP - 333
EP - 340
JO - Plasmonics
JF - Plasmonics
IS - 2
ER -