Effect of Surfactants on the Structural and Luminescence Properties of γ‐CuI Nanocrystals Synthesized by Facile Sonochemical Method. Issue 39 (16th October 2020)

• Record Type: Journal Article
• Authors: Singh, Narinder; Taunk, Manish
• Is Part Of: ChemistrySelect. Volume 5:Issue 39(2020)
• Page Start: 12236
• Page End: 12242
• Publication Date: 2020-10-16
• Subjects: CuI -- FESEM -- nanostructures -- Size-Strain plot -- Williamson-Hall plot -- X-ray diffraction; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202002777
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Semiconducting cuprous iodide (CuI) nanocrystals have been synthesized by the one‐pot sonochemical method at room temperature. The synthesis was performed in aqueous medium using ascorbic acid, polyvinyl pyrrolidone, p‐toluene sulfonic acid and docusate sodium as surfactants. X‐ray diffraction (XRD) study of resulting material reveals the crystalline nature, cubic zinc blende lattice structure and γ phase of CuI nanocrystals. Scherrer method, Williamson‐Hall plot and Size‐Strain plot method have been used to investigate the particle size and intrinsic strain values from the XRD analysis. Field emission scanning electron microscopy (FESEM) revealed the morphology and different shapes (truncated tetrahedron, irregular, hexagonal & clustered) of CuI nanocrystals synthesized using different surfactants. In the PL spectrum of γ‐CuI nanoparticles strong near band‐edge emission was observed at about 423 nm. A slight red‐shift in near band edge emission was observed due to the presence of surfactants. Enhanced electrical conductivity values (1.96 S/cm–9.19 S/cm) were obtained due to the presence of surfactants for γ‐CuI nanocrystals. These properties of CuI nanocrystals makes them a suitable material for the design and development of optoelectronic devices. Abstract : A facile sonochemical method for the synthesis of γ‐CuI nanostructures in the presence of four different surfactants was reported. The nanostructures were characterized using XRD, FESEM, photoluminescence and electrical studies. Depending upon nature of surfactants different morphologies were observed. The dc conductivity value of CuI nanostructures was found to increase by two orders in the presence of surfactants.