Structural, magnetic and optical properties of ZnO nanostructures converted from ZnS nanoparticles

Journal Article · Thu Sep 15 00:00:00 EDT 2016 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2016.05.005· OSTI ID:22581623

Patel, Prayas Chandra; Ghosh, Surajit

Graphical abstract: The phase conversion of ZnS to highly crystalline hexagonal ZnO was done by heat treatment. - Highlights: • Phase change of cubic ZnS to hexagonal ZnO via heat treatment. • Band gap was found to decrease with increasing calcinations temperature. • ZnO samples have higher magnetic moment than ZnS. • Blocking Temperature of the samples is well above room temperature. • Maximum negative%MR with saturation value ∼38% was found for sample calcined at 600° C. - Abstract: The present work concentrates on the synthesis of cubic ZnS and hexagonal ZnO semiconducting nanoparticle from same precursor via co-precipitation method. The phase conversion of ZnS to highly crystalline hexagonal ZnO was done by heat treatment. From the analysis of influence of calcination temperature on the structural, optical and vibrational properties of the samples, an optimum temperature was found for the total conversion of ZnS nanoparticles to ZnO. Role of quantum confinement due to finite size is evident from the blue shift of the fundamental absorption in UV–vis spectra only in the ZnS nanoparticles. The semiconducting nature of the prepared samples is confirmed from the UV–vis, PL study and transport study. From the magnetic and transport studies, pure ZnO phase was found to be more prone to magnetic field.

• OSTI ID: 22581623
• Journal Information: Materials Research Bulletin, Vol. 81; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION SPECTRA
CALCINATION
COPRECIPITATION
FERROMAGNETISM
HEAT TREATMENTS
HEXAGONAL LATTICES
MAGNETIC FIELDS
MAGNETIC MOMENTS
NANOPARTICLES
NANOSTRUCTURES
OPTICAL PROPERTIES
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
ZINC OXIDES
ZINC SULFIDES