title: Growth mechanism and optical property of CdS nanoparticles synthesized using amino-acid histidine as chelating agent under sonochemical process.
abstract: Using amino-acid histidine as chelating agent, CdS nanoparticles have been synthesized by sonochemical method. It is found that by varying the ultrasonic irradiation time, we can tune the band gap and particle size of CdS nanoparticles. The imidazole ring of histidine captures the Cd ions from the solution, and prevents the growth of the CdS nanoparticles. The deviation in the linear relation in between cube of radius of nanoparticles and ultrasonic irradiation time confirms the growth of CdS nanoparticles occur via two process; one is the diffusion process of the reactants as well as reaction at the surface of the crystallite. CdS nanoparticles synthesized using histidine as organic chelating agent have band edge emission at approximately 481 nm and have greater photoluminescence intensity with blue-shift to higher energy due to typical quantum confinement effect.
authors.affiliation: Nanophosphor Application Centre, Physics Department, University of Allahabad, Allahabad-211002, India. raghvendra_nac@yahoo.co.in
authors.forename: Raghvendra S
authors.initials: RS
authors.lastname: Yadav
authors.forename: Priya
authors.initials: P
authors.lastname: Mishra
authors.forename: Rupali
authors.initials: R
authors.lastname: Mishra
authors.forename: Manvendra
authors.initials: M
authors.lastname: Kumar
authors.forename: Avinash C
authors.initials: AC
authors.lastname: Pandey
mesh_terms: D019187:Cadmium Compounds / Q000138:chemical synthesis* / Q000528:radiation effects*; D002614:Chelating Agents / Q000737:chemistry / Q000528:radiation effects; D003460:Crystallization / Q000379:methods; D006639:Histidine / Q000737:chemistry* / Q000528:radiation effects; D049408:Luminescent Agents / Q000138:chemical synthesis* / Q000528:radiation effects*; D008422:Materials Testing; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods; D010316:Particle Size; D011829:Radiation Dosage; D018036:Selenium Compounds / Q000138:chemical synthesis* / Q000528:radiation effects*; D013010:Sonication / Q000379:methods*
chemical_list: D019187:Cadmium Compounds; D002614:Chelating Agents; D049408:Luminescent Agents; D018036:Selenium Compounds; D006639:Histidine; C058667:cadmium selenide