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EnglishStretchable plasmonic nanostructures constituted by Ag nanoparticles on flexible elastomeric matrices are synthesized and used as surface-enhanced Raman scattering (SERS) substrates. The structure consists of silver particles deposited by DC sputtering on polydimethylsiloxane (PDMS). The optical transmittance spectra show marked dips related to plasmonic inter-particle short-range interactions. The substrates show noticeable Raman enhancement allowing detection of R6G at very low concentration. Under mechanically controlled stretching, the interparticle gap sizes change yielding a reversible spectral shift of the plasmonic resonance. Experimental results are validated by 3D modeling. When such a resonance matches the Raman excitation line, pronounced enhancements can be achieved, optimizing the SERS regime. Taking advantage of the PDMS matrices, these tunable SERS-active substrates are integrated in microfluidic circuitry fruitfully exploitable for on-chip label-free detection.
Metal{ extendash}elastomer nanostructures for tunable {SERS} and easy microfluidic integration / Lamberti, Andrea; Virga, Alessandro; Angelini, Angelo; Ricci, Alessandro; Descrovi, Emiliano; Cocuzza, Matteo; Giorgis, Fabrizio. - In: RSC ADVANCES. - ISSN 2046-2069. - 5:6(2015), pp. 4404-4410.
| Titolo: | Metal{ extendash}elastomer nanostructures for tunable {SERS} and easy microfluidic integration |
| Autori: | |
| Data di pubblicazione: | 2015 |
| Rivista: | |
| Citazione: | Metal{ extendash}elastomer nanostructures for tunable {SERS} and easy microfluidic integration / Lamberti, Andrea; Virga, Alessandro; Angelini, Angelo; Ricci, Alessandro; Descrovi, Emiliano; Cocuzza, Matteo; Giorgis, Fabrizio. - In: RSC ADVANCES. - ISSN 2046-2069. - 5:6(2015), pp. 4404-4410. |
| Handle: | http://hdl.handle.net/11696/63090 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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