Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 859, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.157862
Keywords
Surface enhanced Raman scattering; Stretchable sensor; Silver nanowires; Soft substrate
Categories
Funding
- Korea Basic Science Institute (KBSI) [D010500]
- National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2017R1A2B2003365]
- NRF - Korea government (MSIT) [2019R1A2C1007883]
- Basic Science Research Program through the Ministry of Education [2016R1A6A1A03012877]
- National Research Council of Science & Technology (NST), Republic of Korea [D010500] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2019R1A2C1007883] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study demonstrated the use of AgNWNF-coated stretchable PDMS substrates as SERS sensors with strong effects. The adhesion strength of AgNWNEs on UVO-treated PDMS substrates was significantly stronger than that of AgNWNFs on untreated PDMS.
We demonstrate silver nanowire -network-film (AgNWNF)-coated soft polydimethyl siloxane (PDMS) substrates with wrinkled surfaces for use as stretchable SERS sensors. The AgNWNF-coated stretchable substrates showed strong SERS effects compared to those of Ag film-deposited substrates, which were likely attributed to the electromagnetic field enhancement induced by the relatively high density of hot spots in the AgNWNF. To investigate the stability of the stretchable SERS sensors, we examined the adhesion strength of AgNWNEs on the ultraviolet-ozone (UVO)-treated PDMS substrates, which was much stronger than the adhesion strength of AgNWNFs on the PDMS without prior UVO treatment. In addition, the strain-dependent SERS activity of the AgNWNF-coated stretchable sensor showed the detection of 10(-7) M Rhodamine 6G (R6G) molecules despite the decreased Raman intensity under strain increased to 100%, resulting from the surface plasmon resonance tuning by the modulation of the active gap distance between neighboring AgNWs through the application of strain. This was further supported by finite-difference time domain (FDTD) numerical evaluation. (C) 2020 Elsevier B.V. All rights reserved.
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