title: Theoretical and experimental studies of stressed nanoparticles of II-VI semiconductors.
abstract: A theoretical and experimental study of isolated nanoparticles of II-VI semiconductor materials has been done. Using the framework of the effective mass model, the optical absorption spectrum of distributions of spherical quantum dots, freestanding, and under compressive or tensile stress, has been examined theoretically. The theoretical results allow one to foresee the absorption spectra of quantum dots made of a series of materials and having any size. The syntheses of colloidal quantum dots of CdS and CdSe has also been performed through wet chemical routes and characterized by means of optical techniques. The values of the strains in the synthesized quantum dots were inferred from a correlation established between the theoretical and the experimental results.
authors.affiliation: Departamento de Fisica, ICEx, Universidade Federal de Minas Gerais, C. P. 702, 30123-970, Belo Horizonte, Minas Gerais, Brazil. diegolourenconi@gmail.com
authors.forename: D Lourençoni
authors.initials: DL
authors.lastname: Ferreira
authors.forename: F Oliveira
authors.initials: FO
authors.lastname: Silva
authors.forename: L Cristina de Souza
authors.initials: LC
authors.lastname: Viol
authors.forename: P
authors.initials: P
authors.lastname: Licínio
authors.forename: M Antônio
authors.initials: MA
authors.lastname: Schiavon
authors.forename: J Luiz Aarestrup
authors.initials: JL
authors.lastname: Alves
mesh_terms: D019187:Cadmium Compounds / Q000138:chemical synthesis / Q000737:chemistry; D003198:Computer Simulation; D008422:Materials Testing; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D045663:Quantum Dots; D011789:Quantum Theory; D018036:Selenium Compounds / Q000138:chemical synthesis / Q000737:chemistry; D012666:Semiconductors; D013440:Sulfides / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; D013440:Sulfides; C034939:cadmium sulfide; C058667:cadmium selenide