Journal
ACS NANO
Volume 5, Issue 11, Pages 8868-8876Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn2037048
Keywords
self-assembly; monolayer; colloidal nanoparticles; Langmuir-Schaefer; nanopattern; bilayer Moire pattern
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Funding
- U.S. National Science Foundation [DMR-0804779, CBET-0853963]
- U.S.-Israel Binational Science Foundation [2006080]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0804779] Funding Source: National Science Foundation
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0853963] Funding Source: National Science Foundation
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Large-area self-assembled monolayers of nanoparticles are fabricated on the surface of delonized water by controlled evaporation of nanoparticles dispersed In a binary solvent mixture. The difference In solvent volatility and partial coverage of the trough leads to a flux of nanoparticles toward the evaporation front. The monolayers are comprised of monodisperse magnetite and gold nanoparticles or slightly more polydisperse manganese oxide nanoparticles. The floating monolayers are transferred onto different substrates by the Langmuir-Schaefer method. Surfactants in the colloidal solution and substrate materials have significant impact on the monolayer formation. Bilayers of nanoparticles with different twist angles between layers are also obtained by double deposition.
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