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• W2773255197 endingPage "444" @default.
• W2773255197 startingPage "444" @default.
• W2773255197 abstract "In this work, copper (Cu) nanoparticles with observable surface plasmonic resonance (SPR) peaks were synthesized by an in-situ method. Chitosan host polymer was used as a reduction medium and a capping agent for the Cu nanoparticles. The surface morphology of the samples was investigated through the use of scanning electron micrograph (SEM) technique. Copper nanoparticles appeared as chains and white specks in the SEM images. The strong peaks due to the Cu element observed in the spectrum of energy dispersive analysis of X-rays. For the nanocomposite samples, obvious peaks due to the SPR phenomena were obtained in the Ultraviolet-visible (UV-vis) spectra. The effect of Cu nanoparticles on the host band gap was understood from absorption edges shifting of absorption edges to lower photon energy. The optical dielectric loss parameter obtained from the measurable quantities was used as an alternative method to study the band structure of the samples. Quantum mechanical models drawbacks, in the study of band gap, were explained based on the optical dielectric loss. A clear dispersion region was able to be observed in refractive indices spectra of the composite samples. A linear relationship with a regression value of 0.99 was achieved between the refractive index and volume fractions of CuI content. Cu nanoparticles with various sizes and homogenous dispersions were also determined from transmission electron microscope (TEM) images." @default.
• W2773255197 created "2017-12-22" @default.
• W2773255197 creator A5034710991 @default.
• W2773255197 date "2017-12-13" @default.
• W2773255197 modified "2023-10-10" @default.
• W2773255197 title "Morphological and Optical Characteristics of Chitosan(1−x):Cuox (4 ≤ x ≤ 12) Based Polymer Nano-Composites: Optical Dielectric Loss as an Alternative Method for Tauc’s Model" @default.
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• W2773255197 doi "https://doi.org/10.3390/nano7120444" @default.
• W2773255197 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5746934" @default.
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• W2773255197 hasPublicationYear "2017" @default.
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