title: Nanocrystalline Janus films of inorganic materials prepared at the liquid-liquid interface.
abstract: The interface between toluene and water has been employed to prepare ultrathin Janus nanocrystalline films of metal oxides, metal chalcogenides and gold, wherein the surface on the organic-side is hydrophobic and the aqueous-side is hydrophilic. We have changed the nature of the metal precursor or capping agent in the organic layer to increase the hydrophobicity. The strategy employed for this purpose is to increase the length of the alkane chain in the precursor or use a perfluroalkane derivative as precursor or as a capping agent. The hydrophobicity and hydrophilicity of the Janus films have been determined by contact angle measurements. The morphology of hydrophobic and hydrophilic sides of the film have been examined by field emission scanning electron microscopy.
authors.affiliation: Chemistry and Physics of Materials Unit, DST Unit on Nanoscience and CSIR Centre of Excellence in Chemistry, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India.
authors.forename: Kanishka
authors.initials: K
authors.lastname: Biswas
authors.forename: C N R
authors.initials: CN
authors.lastname: Rao
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D006046:Gold / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D012822:Silicon Dioxide / Q000737:chemistry; D013440:Sulfides / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry; D014050:Toluene / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D008567:Membranes, Artificial; D013440:Sulfides; D017967:Zinc Compounds; C034939:cadmium sulfide; D014867:Water; C009495:titanium dioxide; C099343:cuprous sulfide; D014050:Toluene; D006046:Gold; D012822:Silicon Dioxide; D003300:Copper; D015040:Zirconium; D014025:Titanium; C031238:zinc sulfide; C028541:zirconium oxide