On the origin of controlled anisotropic growth of monodisperse gold nanobipyramids

Publication type:
Journal article
Metadata:
Autoren
  • Santosh Kumar Meena
  • Frederic Lerouge
  • Patrice Baldeck
  • Chantal Andraud
  • Marco Garavelli
  • Stephane Parola
  • Marialore Sulpizi
  • Ivan Rivalta
Autoren-URL
https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000692801000001&DestLinkType=FullRecord&DestApp=WOS_CPL
DOI
10.1039/d1nr01768c
eISSN
2040-3372
Externe Identifier
  • Clarivate Analytics Document Solution ID: UW6SL
  • PubMed Identifier: 34486622
ISSN
2040-3364
Ausgabe der Veröffentlichung
36
Zeitschrift
NANOSCALE
Paginierung
15292 - 15300
Datum der Veröffentlichung
2021
Status
Published
Titel
On the origin of controlled anisotropic growth of monodisperse gold nanobipyramids
Sub types
  • Article
Ausgabe der Zeitschrift
13

Data source: Web of Science (Lite)

Other metadata sources:
Abstract
<jats:p>We elucidate the crucial role of the cetyl trimethylammonium bromide (CTAB) surfactant in the anisotropic growth mechanism of gold nano-bipyramids, nano-objects with remarkable optical properties and high tunability.</jats:p>
Autoren
  • Santosh Kumar Meena
  • Frederic Lerouge
  • Patrice Baldeck
  • Chantal Andraud
  • Marco Garavelli
  • Stephane Parola
  • Marialore Sulpizi
  • Ivan Rivalta
DOI
10.1039/d1nr01768c
eISSN
2040-3372
ISSN
2040-3364
Ausgabe der Veröffentlichung
36
Zeitschrift
Nanoscale
Sprache
en
Online publication date
2021
Paginierung
15292 - 15300
Status
Published online
Herausgeber
Royal Society of Chemistry (RSC)
Herausgeber URL
http://dx.doi.org/10.1039/d1nr01768c
Datum der Datenerfassung
2024
Titel
On the origin of controlled anisotropic growth of monodisperse gold nanobipyramids
Ausgabe der Zeitschrift
13

Data source: Crossref

Abstract
We elucidate the crucial role of the cetyl trimethylammonium bromide (CTAB) surfactant in the anisotropic growth mechanism of gold nano-bipyramids, nano-objects with remarkable optical properties and high tunability. Atomistic molecular dynamics simulations predict different surface coverages of the CTAB (positively charged) heads and their (bromide) counterions as function of the gold exposed surfaces. High concentration of CTAB surfactant promotes formation of gold nanograins in solution that work as precursors for the smooth anisotropic growth of more elongated nano-bipyramidal objects. Nanobipyramids feature higher index facets with respect to nanorods, allowing higher CTAB coverages that stabilize their formation and leading to narrower inter-micelles channels that smooth down their anisotropic growth. Absorption spectroscopy and scanning electron microscopy confirmed the formation of nanograins and demonstrated the importance of surfactant concentration on driving the growth towards nano-bipyramids rather than nanorods. The outcome explains the formation of the monodisperse bipyramidal nano-objects, the origin of their controlled shapes and sizes along with their remarkable stability.
Addresses
  • Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory (NCL), Dr. HomiBhabha Road, Pune-411008, India. sk.meena@ncl.res.in.
Autoren
  • Santosh Kumar Meena
  • Frederic Lerouge
  • Patrice Baldeck
  • Chantal Andraud
  • Marco Garavelli
  • Stephane Parola
  • Marialore Sulpizi
  • Ivan Rivalta
DOI
10.1039/d1nr01768c
eISSN
2040-3372
Externe Identifier
  • PubMed Identifier: 34486622
Funding acknowledgements
  • Deutsche Forschungsgemeinschaft: SFB TRR 146
  • Council of Scientific and Industrial Research, India: MLP036726
  • Agence Nationale de la Recherche: ANR-10-LABX-0064
Open access
false
ISSN
2040-3364
Ausgabe der Veröffentlichung
36
Zeitschrift
Nanoscale
Sprache
eng
Medium
Electronic
Online publication date
2021
Paginierung
15292 - 15300
Datum der Veröffentlichung
2021
Status
Published
Datum der Datenerfassung
2021
Titel
On the origin of controlled anisotropic growth of monodisperse gold nanobipyramids.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
13

Data source: Europe PubMed Central

Abstract
We elucidate the crucial role of the cetyl trimethylammonium bromide (CTAB) surfactant in the anisotropic growth mechanism of gold nano-bipyramids, nano-objects with remarkable optical properties and high tunability. Atomistic molecular dynamics simulations predict different surface coverages of the CTAB (positively charged) heads and their (bromide) counterions as function of the gold exposed surfaces. High concentration of CTAB surfactant promotes formation of gold nanograins in solution that work as precursors for the smooth anisotropic growth of more elongated nano-bipyramidal objects. Nanobipyramids feature higher index facets with respect to nanorods, allowing higher CTAB coverages that stabilize their formation and leading to narrower inter-micelles channels that smooth down their anisotropic growth. Absorption spectroscopy and scanning electron microscopy confirmed the formation of nanograins and demonstrated the importance of surfactant concentration on driving the growth towards nano-bipyramids rather than nanorods. The outcome explains the formation of the monodisperse bipyramidal nano-objects, the origin of their controlled shapes and sizes along with their remarkable stability.
Autoren
  • Santosh Kumar Meena
  • Frederic Lerouge
  • Patrice Baldeck
  • Chantal Andraud
  • Marco Garavelli
  • Stephane Parola
  • Marialore Sulpizi
  • Ivan Rivalta
Autoren-URL
https://www.ncbi.nlm.nih.gov/pubmed/34486622
DOI
10.1039/d1nr01768c
eISSN
2040-3372
Ausgabe der Veröffentlichung
36
Zeitschrift
Nanoscale
Sprache
eng
Country
England
Paginierung
15292 - 15300
Datum der Veröffentlichung
2021
Status
Published online
Titel
On the origin of controlled anisotropic growth of monodisperse gold nanobipyramids.
Sub types
  • Journal Article
Ausgabe der Zeitschrift
13

Data source: PubMed

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