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- Title
Using a Vapor-Phase Surfactant to Control Gold Metal Plate Growth.
- Authors
Zhang, Weipeng; Dey, Gangotri; Mandia, David J.; Barry, Seán T.
- Abstract
Hexamethyldisilazide-1,3-diisopropylimidazolidine-2-ylidenegold(I) ( 1) is used to deposit gold microplates with (111) faces. In the absence of any secondary vapor-phase surfactant, these plates show secondary nucleation and growth of gold metal nanoparticles on the (111) faces. When tetrahydrothiophene (THT) is used as a secondary, vapor-phase surfactant, plate size increases, and secondary nucleation is controllable by temperature. Deposition of gold microplates at 370 °C using a 45 mTorr overpressure of THT shows the best experimental results, growing 20 µm2 plateaus with no apparent secondary nucleation. Computational modelling demonstrates that THT is a stronger surfactant than the carbene ligand (from the gold precursor) due to steric hindrance from the alkyl groups present in the carbene ligand.
- Subjects
MICROPLATES; GOLD metallurgy; SURFACE active agents; IMIDAZOLIDINES; THIOPHENE derivatives; CHEMICAL vapor deposition; NUCLEATION; CARBENES
- Publication
Advanced Materials Interfaces, 2017, Vol 4, Issue 4, pn/a
- ISSN
2196-7350
- Publication type
Article
- DOI
10.1002/admi.201600864