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Open Access Structure and Photoluminescence from Naturally Dispersed Znte Nanoparticles

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Crystalline Zinc Telluride nanoparticles were successfully achieved for first time at low temperature using a top-down and eco-friendly fabrication process by sonication of ZnTe microparticles suspended in a liquid media. The structural and optical properties of these nanoparticles were examined using transmission electron microscopy (TEM/SAED/EDX), Raman spectroscopy, UV-visible spectroscopy (UV-vis), and photoluminescence spectroscopy (PL). TEM analysis confirms that the average particle size distribution is in the range of 5 nm and belong to ZnTe cubic structure. Raman spectroscopy of ZnTe nanoparticles showed one transverse optic (TO) and two longitudinal optics (1LO and 2LO) phonon modes attributed to cubic ZnTe. The nanoparticles exhibit good transparency, >80%. Strong UV shift absorption with optical band gap energy (Eg ) of 3.94 eV is observed from UV-visible spectroscopy. The valence band split energy is found to be ΔE = 0.96 eV. PL measurements showed a strong UV emission peak at around 380 nm (3.27 eV). The blue shift is ΔE = 1.01 eV with respect to the absorption band edge of bulk ZnTe. The properties of the nanoparticles are controllable and quantum size confinement effects is observed.

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Keywords: NANOPARTICLES; OPTICAL PROPERTIES; QUANTUM SIZE EFFECTS; ZNTE

Document Type: Miscellaneous

Publication date: April 1, 2019

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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