Document Detail


Formation and Thermal Stability of Gold-Silica Nanohybrids: Insight into the Mechanism and Morphology by Electron Tomography.
MedLine Citation:
PMID:  24599778     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Gold-silica hybrids are appealing in different fields of applications like catalysis, sensorics, drug delivery, and biotechnology. In most cases, the morphology and distribution of the heterounits play significant roles in their functional behavior. Methods of synthesizing these hybrids, with variable ordering of the heterounits, are replete; however, a complete characterization in three dimensions could not be achieved yet. A simple route to the synthesis of Au-decorated SiO2 spheres is demonstrated and a study on the 3D ordering of the heterounits by scanning transmission electron microscopy (STEM) tomography is presented-at the final stage, intermediate stages of formation, and after heating the hybrid. The final hybrid evolves from a soft self-assembled structure of Au nanoparticles. The hybrid shows good thermal stability up to 400 °C, beyond which the Au particles start migrating inside the SiO2 matrix. This study provides an insight in the formation mechanism and thermal stability of the structures which are crucial factors for designing and applying such hybrids in fields of catalysis and biotechnology. As the method is general, it can be applied to make similar hybrids based on SiO2 by tuning the reaction chemistry as needed.
Authors:
Paromita Kundu; Hamed Heidari; Sara Bals; N Ravishankar; Gustaaf Van Tendeloo
Related Documents :
19581588 - Insights into the molecular architecture of the 26s proteasome.
6682718 - Correlation between chemiluminescence response and rate of zymosan uptake by rat alveol...
18764378 - Normal state of highly polarized fermi gases: full many-body treatment.
23811798 - Fluorescent single-ion magnets: molecular hybrid (hnet3)[dyxyb1-x(bpyda)2] (x = 0.135-1).
16403598 - Determining the radial pair-distribution function within intergranular amorphous films ...
23712668 - A dft/tddft study on the optoelectronic properties of the amine-capped magic (cdse)13 n...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-3-5
Journal Detail:
Title:  Angewandte Chemie (International ed. in English)     Volume:  -     ISSN:  1521-3773     ISO Abbreviation:  Angew. Chem. Int. Ed. Engl.     Publication Date:  2014 Mar 
Date Detail:
Created Date:  2014-3-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370543     Medline TA:  Angew Chem Int Ed Engl     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Evaluation of the Pig-a, micronucleus, and comet assay endpoints in a 28-day study with ethyl methan...
Next Document:  The Impact of Peri-operative Anti-TNF Treatment on Anastomosis-Related Complications in Crohn's Dise...