Change search
ReferencesLink to record
Permanent link

Direct link
Porous Au-Ag Nanospheres with High-Density and Highly Accessible Hotspots for SERS Analysis
Show others and affiliations
Number of Authors: 8
2016 (English)In: Nano letters (Print), ISSN 1530-6984, E-ISSN 1530-6992, Vol. 16, no 6, 3675-3681 p.Article in journal (Refereed) Published
Abstract [en]

Colloidal plasmonic metal nanoparticles have enabled surface-enhanced Raman scattering (SERS) for a variety of analytical applications. While great efforts have been made to create hotspots for amplifying Raman signals, it remains a great challenge to ensure their high density and accessibility for improved sensitivity of the analysis. Here we report a dealloying process for the fabrication of porous Au-Ag alloy nanoparticles containing abundant inherent hotspots, which were encased in ultrathin hollow silica shells so that the need of conventional organic capping ligands for stabilization is eliminated, producing colloidal plasmonic nanoparticles with clean surface and thus high accessibility of the hotspots. As a result, these novel nanostructures show excellent SERS activity with an enhancement factor of similar to 1.3 x 10(7) on a single particle basis (off-resonant condition), promising high applicability in many SERS-based analytical and biomedical applications.

Place, publisher, year, edition, pages
2016. Vol. 16, no 6, 3675-3681 p.
Keyword [en]
Porous nanoparticles, plasmonic nanoparticles, dealloying process, hotspots, surface-enhanced Raman scattering
National Category
Chemical Sciences Materials Engineering
URN: urn:nbn:se:su:diva-131928DOI: 10.1021/acs.nanolett.6b00868ISI: 000377642700039PubMedID: 27192436OAI: diva2:946546
Available from: 2016-07-05 Created: 2016-07-04 Last updated: 2016-07-05Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Zheng, Haoquan
By organisation
Department of Materials and Environmental Chemistry (MMK)
In the same journal
Nano letters (Print)
Chemical SciencesMaterials Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 6 hits
ReferencesLink to record
Permanent link

Direct link