Characterization of CdS nanoparticles in solutions of P(TFE-co-PVDF-co- Prop)/N,

2019-08-14 08:34:23

The DMF CdS PVDF prop

责任者: Trigo, C.E.L.;Porto, A.O.;De Lima, G.M. 单位: Departamento de Quimica, ICEx, Universidade Federal de Minas Gerais, CEP 31270-901 Belo Horizonte, MG, Brazil 来源出处: European Polymer Journal,2004,40(11):2465-2469 摘要: We report in here the preparation of CdS nanoparticles (Q-CdS) in N,N-dimethylformamide (DMF). and poly(tetrafluoroethylene-co-vinylidenefluoride- co-propylene) (PTFE-co-PVDF-co-Prop) by reaction of cadmium acetate and thiourea at room temperature. The formation and size evolution of Q-CdS particles were followed by optical absorption spectroscopy as a function of the aging process of the solutions. The obtained results indicated that not only the Q-CdS particles were more stable in DMF than in aqueous solutions, probably due to the interaction with the CHNO group, but also they were formed in smaller sizes. The particle size obtained in DMF was estimated in 4-6 nm against 10-20 nm in aqueous solution. The results also showed that the velocity of Q-CdS formation is lower when the reaction was carried out in PTFE-co-PVDF-co-Prop dissolved in DMF. The Q-CdS particles formed in this system were also less stable than in pure DMF, probably due to the interaction of the CHNO fragment and CF 2 of polymer chain or phase segregation. © 2004 Elsevier Ltd. All rights reserved. 关键词: Cadmium sulfide;Nanostructured materials;Physical vapor deposition;Optoelectronic devices;Particle size analysis;Emulsions;Aging of materials;Passivation;Absorption spectroscopy;Nanoparticles;Poly (tetrafluoroethylene-co-vinylidene fluoride-co-propylene);Surface passivation;Phase segregation