Rapid deposition of hydrophobic nanoparticle monolayers onto hydrophilic surfaces from liquid-liquid interfaces.
Dense, hydrophobic coatings comprising hydrophilic nanoparticles are deposited rapidly from water/toluene emulsions. The process of deposition is driven by a subtle interplay between interfacial phenomena, electrostatic interparticle repulsions, and hydrogen bonding between the NPs and the substrate(s). The packing fractions and the plasmonic properties of the coatings can be controlled by the pH of the aqueous phase. Once formed, the coatings can be further functionalized without a loss of mechanical integrity.
Department of Chemical and Biological Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
Bartlomiej
B
Kowalczyk
Mario M
MM
Apodaca
Siowling
S
Soh
Bartosz A
BA
Grzybowski
D006046:Gold; D057927:Hydrophobic and Hydrophilic Interactions; D053768:Metal Nanoparticles; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry*; D012834:Silver / Q000737:chemistry; D013499:Surface Properties
D012834:Silver; D006046:Gold