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Preparation and optical properties of nanocomposite film of CdS:Cu with biomacromolecules
Author(s) -
Wang Liping,
Sun Yujie,
Zhang Fu
Publication year - 2014
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.22684
Subject(s) - materials science , nanocomposite , transmission electron microscopy , composite number , nanoparticle , photoluminescence , chitosan , spin coating , absorption (acoustics) , composite material , scanning electron microscope , chemical engineering , absorption spectroscopy , ultraviolet , blueshift , coating , layer (electronics) , diffraction , nanotechnology , optics , optoelectronics , physics , engineering
Nanocomposite films of CdS:Cu nanoparticles with chitosan and sodium alginate were prepared using spin‐coating method, and characterized by X‐ray diffraction, transmission electron microscopy, atomic force microscopy (AFM), ultraviolet–visible (UV–vis), and photoluminescent spectrum. The CdS:Cu nanoparticles have a cubic structure with an average crystal size of ∼2 nm, which show blue shift in UV–vis absorption spectra compared to bulk CdS. Furthermore, the CdS:Cu nanoparticles are formed steadily with increasing number of composite layers and homogeneously distributed between the chitosan and alginate layer. AFM measurement shows that the average height of a mono‐layered composite film is 25 nm. Emissions ascribed to the electron–hole recombination of CdS and the t 2 ‐like energy level of Cu was observed for the multi‐layered composite films. POLYM. COMPOS., 35:477–481, 2014. © 2013 Society of Plastics Engineers