We are developing a polymer-silver nanocomposite self-assembling-based protocol for fabricating surface-enhanced Raman scattering (SERS) substrates for versatile applications. The substrate is based on a silver-made fractal nanotexture produced by the long-range self-assembling of Ag-loaded block-copolymer micelles. We removed the nano-packing limitation imposed by the copolymer shell, achieving a condition close to the so-called hyperuniform structural disorder. Despite the large enhancement factor, estimated up to 109, the SERS response shows an ultrahigh spatial uniformity with a relative standard deviation in the range 0.9% - 5.6%, as measured from raster scans covering a total area of 1 cm2, that is from an active surface orders of magnitude larger than the typical nanofeature size and produced by an innovative low-cost and immediate deposition. The SERS-active coating allows large-scale spectroscopic scanning as required for real biological applications, still having, as experimentally evidenced, single-molecule sensitivity. © 2014 IEEE.
Plasmon-enhanced Raman spectroscopy: Towards hyperuniform ultrasensitive enhancement through hyperuniform disorder / Zito, G.; Rusciano, G.; Pesce, G.; Dochshanov, A. M.; Malafronte, A.; Ausanio, G.; Sasso, A.. - (2014), pp. 1-3. (Intervento presentato al convegno 2014 3rd Mediterranean Photonics Conference, MePhoCo 2014 tenutosi a Trani, ita nel 2014) [10.1109/MePhoCo.2014.6866481].
Plasmon-enhanced Raman spectroscopy: Towards hyperuniform ultrasensitive enhancement through hyperuniform disorder
Zito G.
Primo
;Rusciano G.Secondo
;Pesce G.;Malafronte A.;Ausanio G.Penultimo
;Sasso A.Ultimo
2014
Abstract
We are developing a polymer-silver nanocomposite self-assembling-based protocol for fabricating surface-enhanced Raman scattering (SERS) substrates for versatile applications. The substrate is based on a silver-made fractal nanotexture produced by the long-range self-assembling of Ag-loaded block-copolymer micelles. We removed the nano-packing limitation imposed by the copolymer shell, achieving a condition close to the so-called hyperuniform structural disorder. Despite the large enhancement factor, estimated up to 109, the SERS response shows an ultrahigh spatial uniformity with a relative standard deviation in the range 0.9% - 5.6%, as measured from raster scans covering a total area of 1 cm2, that is from an active surface orders of magnitude larger than the typical nanofeature size and produced by an innovative low-cost and immediate deposition. The SERS-active coating allows large-scale spectroscopic scanning as required for real biological applications, still having, as experimentally evidenced, single-molecule sensitivity. © 2014 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
