English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/128586
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Hollow Au/Ag nanostars displaying broad plasmonic resonance and high surface-enhanced Raman sensitivity

AuthorsGarcía-Leis, Adianez ; Torreggiani, A.; García-Ramos, José Vicente ; Sánchez-Cortés, Santiago
Issue Date9-Jul-2015
PublisherRoyal Society of Chemistry (UK)
CitationNanoscale 7: 13629- 13637 (2015)
AbstractThis journal is © The Royal Society of Chemistry. Bimetallic Au/Ag hollow nanostar (HNS) nanoparticles with different morphologies were prepared in this work. These nanoplatforms were obtained by changing the experimental conditions (concentration of silver and chemical reductors, hydroxylamine and citrate) and by using Ag nanostars as template nanoparticles (NPs) through galvanic replacement. The goal of this research was to create bimetallic Au/Ag star-shaped nanoparticles with advanced properties displaying a broader plasmonic resonance, a cleaner exposed surface, and a high concentration of electromagnetic hot spots on the surface provided by the special morphology of nanostars. The size, shape, and composition of Ag as well as their optical properties were studied by extinction spectroscopy, hyperspectral dark field microscopy, transmission and scanning electron microscopy (TEM and SEM), and energy dispersive X-ray spectroscopy (EDX). Finally, the surface-enhanced Raman scattering (SERS) activity of these HNS was investigated by using thioflavin T, a biomarker of the β-amyloid fibril formation, responsible for Alzheimer's disease. Lucigenin, a molecule displaying different SERS activities on Au and Ag, was also used to explore the presence of these metals on the NP surface. Thus, a relationship between the morphology, plasmon resonance and SERS activity of these new NPs was made.
Description9 pas.; 7 figs.; 2 tabs.
Publisher version (URL)http://dx.doi.org/10.1039/c5nr02819a
URIhttp://hdl.handle.net/10261/128586
DOI10.1039/c5nr02819a
Identifiersdoi: 10.1039/c5nr02819a
issn: 2040-3372
Appears in Collections:(CFMAC-IEM) Artículos
Files in This Item:
File Description SizeFormat 
hollow_AuAg_Nanostars.pdf1,26 MBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.