NDLI: Growth and branching of gold nanoparticles through mesoporous silica thin films

Content Provider	Royal Society of Chemistry (RSC)
Author	Angelomé, Paula C. Pérez-Juste, Jorge Liz-Marzán, Luis M. Soler-Illia, Galo J. A. A. Rodríguez-González, Benito Zelcer, Andrés Pastoriza-Santos, Isabel
Copyright Year	2012
Abstract	Composite materials made of mesoporous oxide thin films containing metallic nanoparticles are of high interest in various fields, including catalysis, biosensing and non-linear optics. We demonstrate in this work the fabrication of such composite materials containing a sub-monolayer of gold nanoparticles (GNPs) of various shapes covered with mesoporous silica thin films. Additionally, the shape of the GNPs (and thus their optical properties) can be modified in situ through seeded growth and branching. Such growth proceeds upon wetting with HAuCl4 solution, a surfactant (cetyltrimethylammonium bromide, CTAB) and a mild reducing agent (ascorbic acid, AA). The effect of varying several reaction parameters (time and CTAB and AA concentrations) was evaluated, showing that more anisotropic particles are obtained at longer reaction times, lower CTAB concentration and higher AA concentration. The final shape of the GNPs was also found to depend on their initial shape and size, as well as the pore size of the mesoporous film covering them. Because the growth proceeds through the pores of the film, it may lead to shapes that are not easily obtained in solution, such as particles with branches on one side only. Finally, we have confirmed that no damage was induced to the mesoporous silica structure during the growth process and thus the final particles remain well covered by the thin film, which can eventually be used as a filter between the GNPs and the outer medium.
Starting Page	931
Ending Page	939
Page Count	9
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	4
Issue Number	3
Journal	Nanoscale
DOI	10.1039/c2nr11547f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Mesoporous material Anisotropy Mesoporous silica Redox Surfactant CTAB Nonlinear optics Bromide
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

A cationic surfactant assisted selective etching strategy to hollow mesoporous silica spheres

One-step synthesis of degradable T₁-FeOOH functionalized hollow mesoporous silica nanocomposites from mesoporous silica spheres

Mesoporous silica nanoparticles with tunable pore size for tailored gold nanoparticles

Mechanised nanoparticles for drug delivery

Fabrication of colloidal crystals composed of pore-expanded mesoporous silica nanoparticles prepared by a controlled growth method

Sequestration of cerium(III) bromide into mesoporous silica

Ultrafast nonlinear optical response of Ag nanoparticles embedded in mesoporous thin films

Redox-Active Vertically Aligned Mesoporous Silica Thin Films as Transparent Surfaces for Energy Storage Applications

Self-templating synthesis of hollow mesoporous silica and their applications in catalysis and drug delivery

Growth and branching of gold nanoparticles through mesoporous silica thin films

Similar Documents

A cationic surfactant assisted selective etching strategy to hollow mesoporous silica spheres

One-step synthesis of degradable T1-FeOOH functionalized hollow mesoporous silica nanocomposites from mesoporous silica spheres

Mesoporous silica nanoparticles with tunable pore size for tailored gold nanoparticles

Mechanised nanoparticles for drug delivery

Fabrication of colloidal crystals composed of pore-expanded mesoporous silica nanoparticles prepared by a controlled growth method

Sequestration of cerium(III) bromide into mesoporous silica

Ultrafast nonlinear optical response of Ag nanoparticles embedded in mesoporous thin films

Redox-Active Vertically Aligned Mesoporous Silica Thin Films as Transparent Surfaces for Energy Storage Applications

Self-templating synthesis of hollow mesoporous silica and their applications in catalysis and drug delivery

Growth and branching of gold nanoparticles through mesoporous silica thin films

One-step synthesis of degradable T₁-FeOOH functionalized hollow mesoporous silica nanocomposites from mesoporous silica spheres