English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Spiked gold nanotriangles : formation, characterization and applications in surface-enhanced Raman spectroscopy and plasmon-enhanced catalysis

Liebig, F., Sarhan, R. M., Bargheer, M., Schmitt, C. N. Z., Poghosyan, A. H., Shahinyan, A. A., et al. (2020). Spiked gold nanotriangles: formation, characterization and applications in surface-enhanced Raman spectroscopy and plasmon-enhanced catalysis. RSC Advances, 10(14), 8152-8160. doi:10.1039/D0RA00729C.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0005-C4CF-5 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-C4D0-2
Genre: Journal Article

Files

show Files
hide Files
:
Article.pdf (Publisher version), 2MB
Name:
Article.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-

Locators

show

Creators

show
hide
 Creators:
Liebig, Ferenc, Author
Sarhan, Radwan M., Author
Bargheer, Matias, Author
Schmitt, Clemens N. Z.1, Author              
Poghosyan, Armen H., Author
Shahinyan, Aram A., Author
Koetz, Joachim, Author
Affiliations:
1Luca Bertinetti, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2379691              

Content

show
hide
Free keywords: -
 Abstract: We show the formation of metallic spikes on the surface of gold nanotriangles (AuNTs) by using the same reduction process which has been used for the synthesis of gold nanostars. We confirm that silver nitrate operates as a shape-directing agent in combination with ascorbic acid as the reducing agent and investigate the mechanism by dissecting the contribution of each component, i.e., anionic surfactant dioctyl sodium sulfosuccinate (AOT), ascorbic acid (AA), and AgNO3. Molecular dynamics (MD) simulations show that AA attaches to the AOT bilayer of nanotriangles, and covers the surface of gold clusters, which is of special relevance for the spike formation process at the AuNT surface. The surface modification goes hand in hand with a change of the optical properties. The increased thickness of the triangles and a sizeable fraction of silver atoms covering the spikes lead to a blue-shift of the intense near infrared absorption of the AuNTs. The sponge-like spiky surface increases both the surface enhanced Raman scattering (SERS) cross section of the particles and the photo-catalytic activity in comparison with the unmodified triangles, which is exemplified by the plasmon-driven dimerization of 4-nitrothiophenol (4-NTP) to 4,4′-dimercaptoazobenzene (DMAB).

Details

show
hide
Language(s): eng - English
 Dates: 2020-02-252020
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1039/D0RA00729C
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: RSC Advances
  Abbreviation : RSC Adv.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Cambridge, UK : Royal Society of Chemistry
Pages: - Volume / Issue: 10 (14) Sequence Number: - Start / End Page: 8152 - 8160 Identifier: ISSN: 2046-2069