Investigations on structural and optical properties of starch capped ZnS nanoparticles synthesized by microwave irradiation method

[Display omitted] •Synthesis of starch capped ZnS nanoparticles following green chemistry principles.•Starch capping ensured by TEM, HRTEM and FTIR studies.•Quantum size effects observed in optical absorption studies.•Progressive quenching of surface states with starch addition observed in PL spectr...

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Bibliographic Details
Published inChemical physics letters Vol. 700; pp. 74 - 79
Main Authors Lalithadevi, B., Mohan Rao, K., Ramananda, D.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 16.05.2018
Subjects
Microwave irradiation
Photoluminescence
Raman scattering
Starch
ZnS nanoparticles
Microwave irradiation
ZnS nanoparticles
Starch
Raman scattering
Photoluminescence
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Summary:[Display omitted] •Synthesis of starch capped ZnS nanoparticles following green chemistry principles.•Starch capping ensured by TEM, HRTEM and FTIR studies.•Quantum size effects observed in optical absorption studies.•Progressive quenching of surface states with starch addition observed in PL spectra. Following a green synthesis method, zinc sulfide (ZnS) nanoparticles were prepared by chemical co-precipitation technique using starch as capping agent. Microwave irradiation was used as heating source. X-ray diffraction studies indicated that nanopowders obtained were polycrystalline possessing ZnS simple cubic structure. Transmission electron microscopic studies indicated that starch limits the agglomeration by steric stabilization. Interaction between ZnS and starch was confirmed by Fourier transform infrared spectroscopy as well as Raman scattering studies. Quantum size effects were observed in optical absorption studies while quenching of defect states on nanoparticles was improved with increase in starch addition as indicated by photoluminescence spectra.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2018.04.010