title: Ultra-thin crystalline films of CdSe and CuSe formed at the organic-aqueous interface.
abstract: Two-dimensional nanostructures in the form of ultra-thin crystalline films of CdSe and CuSe have been prepared at the organic-aqueous interface by reacting toluene solutions of metal cupferronates with an aqueous solution of N,N-dimethyl selenourea. The films have been examined using electron microscopy and optical spectroscopy. At lower concentrations of the reacting species, the CdSe films formed at the toluene-water interface at approximately 30 degrees C consisted mostly of nanocrystals. With increase in concentration as well as temperature, the interface reaction yielded thicker films which are mostly single-crystalline. We have studied the time-dependent growth of the CdSe film at the interface using UV-visible absorption spectroscopy. Ultra-thin films of CuSe formed at the toluene-water interface are generally single-crystalline.
authors.affiliation: Chemistry and Physics of Materials Unit, DST Nanoscience Unit and CSIR Centre of Excellence in Chemistry, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore 560064, India.
authors.forename: K P
authors.initials: KP
authors.lastname: Kalyanikutty
authors.forename: Ujjal K
authors.initials: UK
authors.lastname: Gautam
authors.forename: C N R
authors.initials: CN
authors.lastname: Rao
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008567:Membranes, Artificial; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods; D009930:Organic Chemicals / Q000737:chemistry; D016566:Organoselenium Compounds / Q000737:chemistry*; D010316:Particle Size; D018036:Selenium Compounds / Q000737:chemistry*; D013499:Surface Properties; D014508:Urea / Q000031:analogs & derivatives* / Q000737:chemistry; D014867:Water / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D046911:Macromolecular Substances; D008567:Membranes, Artificial; D009930:Organic Chemicals; D016566:Organoselenium Compounds; D018036:Selenium Compounds; D014867:Water; C081959:selenourea; C477347:cupric selenide; D014508:Urea; C058667:cadmium selenide