Microorganisms create various health issues; semiconductor nanostructures have raised interest because of antimicrobial properties for suppressing microbial growth. Herein, we report the synthesis of ZnSe nanostructures (NSs) using a green coprecipitation method, and the assynthesized samples were annealed at 100, 150, and 200 °C temperatures. The synthesized samples were analyzed for structural, morphological, optical, and antibacterial properties. The growth of nanorods was confirmed by TEM micrographs and that of nanoparticles by FESEM and TEM micrographs. The cubic zinc blender phase of samples was confirmed by XRD. The high-intensity electron−phonon (e−ph) interactions and LO modes were confirmed by the Raman spectra. The UV−visible absorption spectra predicted the blue shift in optical band gaps of ZnSe NSs from their bulk counterparts. The PL spectra and associated CIE diagram indicated that the as-synthesized and annealed NSs produce blue color. The investigated antimicrobial activity against Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus implies the superior biological activity of the as-synthesized and annealed samples at 200 °C. The annealing enhances photoluminescence and antimicrobial activities of ZnSe NSs. The enhanced luminscence properties of ZnSe NSs make them suitable for preparing more efficient blue LEDs and lasers for medical applications. The as-synthesized and annealed ZnSe NSs are found effective against the growth of microorganisms, and sustaining this tendency for 1 week provides a strong basis for the development of new drugs against bacterial infections for supporting the pharmaceutical industry.
In the present work ZnSe nanorods (NRs) have been synthesised using simple Co-precipitation method and as-synthesised sample annealed at 300 0 C in air atmosphere. The structural, morphological and optical properties of prepared samples have been investigated using x-rays diffraction (XRD), transmission electron microscope (TEM), UV-Visible and Photoluminescence (PL) spectroscopy techniques. The XRD results revealed the formation of hexagonal structure of as-synthesized ZnSe NRs which were elongated to the reflection (101). TEM micrographs confirmed the formation of nanorods. Air annealing quenched the hexagonal ZnSe NRs to the hexagonal ZnSe/ZnO nanoparticles. UV–visible absorption spectroscopy predicted the blue shift in band gap of NRs and NPs to the bulk band gap of ZnSe. The PL spectra and corresponding CIE diagram predicted the as-synthesized NRs and quenched NPs emitted bluish colour and found suitable for Blue LEDs and Lasers which are useful in medical, health, pharmaceutical and food industry.
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