title: A method to form semiconductor quantum dot (QD) thin films by igniting a flame at air-liquid interface: CdS and WO3.
abstract: We reveal an easy, inexpensive, efficient one stepflame synthesis of semiconductor/metal oxide thin films at air-liquid interface, subsequently, transferred on suitable substrate. The method has been illustrated by the formation of CdS and WO3 QDs thin films. The features of the present method are (1) Growth of thin films consisting of0.5-2.0nm sized Quantum Dots (QDs)/(ultra-small nanoparticles) in a short time, at the air-liquid interface which can be suitably transferred by a well-known Blodgett technique to an appropriate substrate, (2) The method is suitable to apply layer by layer (LbL) technique to increase the film thickness as well as forming various compositions as revealed by AFM measurements. The films are characterized for their structure (SAED), morphology (TEM), optical properties (UV-Vis.) and photoluminescence (PL). Possible mechanism of formation of QDs thin film and effect of capping in case of CdS QDs is discussed.
authors.affiliation: Center for Materials Characterization, National Chemical Laboratory, Pune 411008, India.
authors.forename: Aarti H
authors.initials: AH
authors.lastname: Jadhav
authors.affiliation: Center for Materials Characterization, National Chemical Laboratory, Pune 411008, India.
authors.forename: Sagar H
authors.initials: SH
authors.lastname: Patil
authors.affiliation: Ex-Scientist, 759/83 Deccan Gymkhana, Pune 411004, India.
authors.forename: Shivaram D
authors.initials: SD
authors.lastname: Sathaye
authors.affiliation: Center for Materials Characterization, National Chemical Laboratory, Pune 411008, India. Electronic address: kr.patil@ncl.res.in.
authors.forename: Kashinath R
authors.initials: KR
authors.lastname: Patil
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D005648:Fuel Oils; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000379:methods*; D010087:Oxides / Q000737:chemistry*; D045663:Quantum Dots; D012666:Semiconductors; D013440:Sulfides / Q000737:chemistry*; D013499:Surface Properties; D014414:Tungsten / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D005648:Fuel Oils; D010087:Oxides; D013440:Sulfides; C034939:cadmium sulfide; D014414:Tungsten
keywords: CdS; Flame synthesis; Interface; Quantum Dots (QDs); Thin film; WO(3)