RT Journal Article
T1 Robust raspberry-like metallo-dielectric nanoclusters of critical sizes as SERS substrates
A1 Le Beulze, A
A1 Gómez Graña, Sergio
A1 Gehan, H
A1 Mornet, S
A1 Ravaine, S
A1 Correa Duarte, Miguel Ángel
A1 Guerrini, Luca
A1 Álvarez Puebla, Ramón A
A1 Duguet, Etienne
A1 Pertreux, Etienne
A1 Crut, Aurélien
A1 Maioli, Paolo
A1 Vallée, Fabrice
A1 Del Fatti, Natalia
A1 Erseng, O
A1 Treguer-Delapierre, M
K1 2307 Química Física
AB Raspberry-like nano-objects made of large plasmonic satellites (>10 nm) covering a central dielectric particle have many potential applications as photonic materials, superlenses and (bio-) sensors, but their synthesis remains challenging. Herein, we show how to build stable and robust raspberry-like nano-systems with close-packed satellites, by combining monodisperse silica particles (80 or 100 nm diameter) and oppositely charged noble metal nanoparticles (Au or Ag) with well-defined sizes (10–50 nm). The spectral characteristics of their associated plasmonic resonances (wavelength, linewidth, extinction cross-section) and the electromagnetic coupling between satellites were observed using the spatial modulation spectroscopy technique and interpreted through a numerical model. The composite nano-objects exhibit numerous hot spots at satellite junctions, resulting in excellent surface-enhanced Raman scattering (SERS) performance. The SERS efficiency of the raspberry-like clusters is highly dependent on their structure.
PB Nanoscale
SN 20403364
YR 2017
FD 2017
LK http://hdl.handle.net/11093/6064
UL http://hdl.handle.net/11093/6064
LA eng
NO Nanoscale, 9(17): 5725-5736 (2017)
NO Ministerio de Economía y Competitividad | Ref. CTM2014-58481-R
DS Investigo
RD 25-ene-2025