Autor segons l'article: Le Beulze, A.; Gomez-Grana, S.; Gehan, H.; Mornet, S.; Ravaine, S.; Correa-Duarte, M.; Guerrini, L.; Alvarez-Puebla, R. A.; Duguet, E.; Pertreux, E.; Crut, A.; Maioli, P.; Vallee, F.; Del Fatti, N.; Ersen, O.; Treguer-Delapierre, M.;
Departament: Química Física i Inorgànica
Autor/s de la URV: Alvarez Puebla, Ramon Angel / Guerrini, Luca
Paraules clau: Surface Silver Nanoparticles Nano Microspheres Gold Enhanced raman-scattering Clusters
Resum: 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.
Àrees temàtiques: Química Physics, applied Odontología Nanoscience and nanotechnology Nanoscience & nanotechnology Medicina ii Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) Materiais Matemática / probabilidade e estatística Interdisciplinar General materials science Farmacia Engenharias iv Engenharias iii Engenharias ii Economia Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências agrárias i Chemistry, multidisciplinary Biotecnología Biodiversidade Astronomia / física
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: ramon.alvarez@urv.cat luca.guerrini@urv.cat
Identificador de l'autor: 0000-0003-4770-5756 0000-0002-2925-1562
Data d'alta del registre: 2024-09-07
Versió de l'article dipositat: info:eu-repo/semantics/submittedVersion
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Nanoscale. 9 (17): 5725-5736
Referència de l'ítem segons les normes APA: Le Beulze, A.; Gomez-Grana, S.; Gehan, H.; Mornet, S.; Ravaine, S.; Correa-Duarte, M.; Guerrini, L.; Alvarez-Puebla, R. A.; Duguet, E.; Pertreux, E.; (2017). Robust raspberry-like metallo-dielectric nanoclusters of critical sizes as SERS substrates. Nanoscale, 9(17), 5725-5736. DOI: 10.1039/C7NR00969K
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2017
Tipus de publicació: Journal Publications
Repositori URV