Please use this identifier to cite or link to this item:
|Title:||Covalent molecular assembly in a supercritical medium: Formation of nanoparticles encapsulated in immobilized dendrimers|
|Source:||Puniredd, S.R., Srinivasan, M.P. (2007-01-17). Covalent molecular assembly in a supercritical medium: Formation of nanoparticles encapsulated in immobilized dendrimers. Industrial and Engineering Chemistry Research 46 (2) : 464-471. ScholarBank@NUS Repository. https://doi.org/10.1021/ie060822q|
|Abstract:||This work demonstrates the feasibility of forming metallic nanoparticles within the confines of dendrimerladen ultrathin films that are immobilized on a solid surface. The functional property of the poly amido amine dendrimer (PAMAM) as a sequestering agent for Cu nanoparticles was exploited by the introduction of copper acetylacetonate (Cu(acac)2) as a precursor. The nanoparticle precursors were introduced into the matrix using supercritical carbon dioxide and liquid tetrahydrofuran (THF) as processing media. The precursors were subsequently reduced to form the nanoparticles. The resulting film assemblies were characterized via X-ray photoelectron and UV-visible absorption spectroscopies, atomic force, scanning electron, transmission electron microscopies, and ellipsometry. Higher yield, a denser distribution of nanoparticles, and greater stability toward polar solvent attack were observed when the structures were assembled in supercritical CO2 than when THF was employed. TEM images revealed that the embedded nanoparticles are fairly tightly distributed in terms of size with an average diameter of 7 nm. © 2007 American Chemical Society.|
|Source Title:||Industrial and Engineering Chemistry Research|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Mar 6, 2018
WEB OF SCIENCETM
checked on Jan 24, 2018
checked on Mar 11, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.