Bi-nanoparticle (CdTe and CdSe) mixed polyaniline hybrid thin films prepared using spin coating technique

作者：Verma Deepak; Dutta V^*

来源：Journal of Applied Physics, 2009, 105(3): 034904.

DOI：10.1063/1.3072627

• cadmium compounds
• charge exchange
• conducting polymers
• electrochemistry
• excitons
• filled polymers
• II-VI semiconductors
• infrared spectra
• nanocomposites
• nanoparticles
• organic semiconductors
• oxidation
• photoluminescence
• scanning electron microscopy
• semiconductor thin films
• spin coating
• voltammetry (chemical analysis)
• wide band gap semiconductors

Polyaniline (Pani) films containing CdTe, CdSe, and both nanoparticles were deposited using spin coating technique. Pani was chemically synthesized by oxidation method, whereas surfactant free CdTe and CdSe nanoparticles were prepared using solvothermal method. Binanoparticle films showed an increase in the absorption from 350 nm to the near IR region. Absorption spectra also showed charge transfer complex formation for the binanoparticle hybrid thin films prepared with weight ratio of [Pani (camphor sulfonic acid, CSA):CdTe:CdSe] 200:100:75. Photoluminescence measurement for the bi-nanoparticle hybrid thin films confirmed that the required dissociation of excitons was taking place at the interface. Scanning electron microscopy images showed homogeneity and an interconnected network on the surface of the films prepared with Pani (CSA):CdTe:CdSe weight ratios of 200:100:50 and 200:100:75, respectively. Cyclic voltammetry confirmed better stability for the bi-nanoparticle hybrid films in comparison to Pani film. It also established the process of electrochemical charge transfer between the nanoparticles and the polymer matrix.

• 出版日期2009-2-1