ItemArticle

Zinc gallate nanoparticles: A multifunctional material for optoelectronic and optical limiting applications

Title
Zinc gallate nanoparticles: A multifunctional material for optoelectronic and optical limiting applications
Creator
Jochan, Indu Treesa; Anila, E.I.; Girisun, T.C. Sabari; Vinitha, G.; Arha, M.
Description
Wide-bandgap spinel oxides have attracted increasing attention due to their structural stability and multifunctional properties, yet the nonlinear optical and optical limiting behaviour of zinc gallate (ZnGa?O?) remains largely unexplored. To address this gap, ZnGa?O? nanoparticles were synthesised using a hydrothermal method at different pH levels, with X-ray diffraction (XRD) confirming a phase-pure cubic spinel structure at pH = 10. Rietveld refinement further validated the crystal structure and was visualised using VESTA software. FTIR confirmed the presence of characteristic metaloxygen bonds. FESEM revealed an agglomerated nanoparticle morphology. TEM verified the particle structure, and EDAX confirmed elemental composition, collectively supporting the cubic structure. XPS validated the oxidation states of Zn? and Ga ?. Optical characterisation using photoluminescence and diffuse reflectance spectroscopy confirmed the wide bandgap nature of the material. Strong blue emission under UV excitation demonstrated the photoluminescent behaviour. DC conductivity measurements were conducted to evaluate the electrical transport behaviour of the synthesised material. The third-order nonlinear optical (NLO) properties were systematically investigated using open- and closed-aperture Z-scan techniques under continuous-wave and nanosecond pulsed laser excitation. The material exhibited reverse saturable absorption, a negative nonlinear refractive index, and a large third-order susceptibility, along with efficient optical limiting behaviour under pulsed excitation. These results demonstrate that hydrothermally synthesised ZnGa?O? nanoparticles possess strong third-order nonlinearity and effective optical limiting performance, establishing zinc gallate as a promising spinel oxide for laser protection and advanced photonic applications. 2026 Elsevier B.V.
Source
Journal of Alloys and Compounds;Volume;1054;Issue;;Article No.;186302;
Date
01-01-2026
Publisher
Elsevier Ltd
Subject
Conductivity; Optical limiter; Rietveld refinement; Wide bandgap; Zinc gallate
Coverage
Jochan I.T., Optoelectronic and Nanomaterials Research Laboratory, Department of Physics and Electronics, CHRIST University, Karnataka, Bengaluru, 560029, India, Department of Physics, St. Aloysius College, Edathua, Kerala, 689573, India; Anila E.I., Optoelectronic and Nanomaterials Research Laboratory, Department of Physics and Electronics, CHRIST University, Karnataka, Bengaluru, 560029, India; Girisun T.C.S., School of Physics, Bharathidasan University, Tiruchirappalli, 620 024, India; Vinitha G., Division of Physics, S.A.S, V.I.T. University, Chennai, 600048, India; Arha M., Amrita Vishwa Vidyapeetham, Amritapuri Campus, Vallikavu, Kerala, 690573, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 9258388; CODEN: JALCE
Format
online
Language
English
Type
Article

Citation

Jochan, Indu Treesa; Anila, E.I.; Girisun, T.C. Sabari; Vinitha, G.; Arha, M., “Zinc gallate nanoparticles: A multifunctional material for optoelectronic and optical limiting applications,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 18, 2026, https://archives.christuniversity.in/items/show/22323.

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