Small angle x-ray scattering study of the aggregation of gold nanoparticles during formation at the toluene-water interface
We report the results of an in situ small-angle x-ray scattering (SAXS) study of the aggregation of gold nanoparticles formed by an interfacial reaction at the toluene-water interface. The SAXS data provide a direct evidence for aggregate formation of nanoparticles having 1.3 nm gold core and an organic shell that gives a core-core separation of about 2.5 nm. Furthermore, the nanoparticles do not occupy all the cites of 13-member cluster. This occupancy decreases with reaction time and indicate reorganization of the clusters that generates planner disklike structures. A gradual increase in fractal dimension from 1.82 to 2.05 also indicate compactification of cluster aggregation with reaction time, the final exponent being close to 2 expected for disklike aggregates.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE SC OFFICE OF SCIENCE (SC)
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1041160
- Report Number(s):
- BNL-91350-2010-JA; R&D Project: LS001; KC0401030; TRN: US201211%%465
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 81, Issue 11; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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