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Mechanoluminescence from highly transparent ZGO:Cr spinel glass ceramics

Cao JIANGKUN, Ding YICONG, Sajzew ROMAN, Sun MINGHUI, Langenhorst FALKO, Wondraczek L (2022)

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Publication Type: Journal article

Publication year: 2022

Journal

Book Volume: 12

Pages Range: 3238-3247

Journal Issue: 8

DOI: 10.1364/OME.459185

Abstract

Light emission in response to mechanical stimulation-termed mechanoluminescence (ML)-enables the optical detection and visualization of mechanical strain. In particular, materials with ML response in the transmission window of aqueous media or biological tissue enable in situ stress level monitoring, biophysical imaging or mechanically induced light delivery. However, most of today’s ML materials are polycrystalline ceramics or ceramic particle composites, which puts constraints on their bulk processability, material homogeneity and optical transparency. Here, we demonstrate ML from highly transparent glass ceramics comprising of a high-volume fraction of extraordinarily small Cr³⁺-doped ZnGa2O4 (ZGO) crystals embedded in a binary potassium germanate glass matrix. The ZGO phase is precipitated directly from the precursor glass by homogeneous nucleation in a narrow temperature window; entropic phase separation and a self-limited crystal growth rate yield a crystal number density above 10²³ m⁻³. The residual glass matrix encapsulates these crystals in a dense, highly homogeneous material, whereby the microstructural stability and the extended supercooling range of the glass enable glass-like processing, for example, in the shapes of fiber, beads or microspheres.

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How to cite

APA:

Cao, J.I.A.N.G.K.U.N., Ding, Y.I.C.O.N.G., Sajzew, R.O.M.A.N., Sun, M.I.N.G.H.U.I., Langenhorst, F.A.L.K.O., & Wondraczek, L. (2022). Mechanoluminescence from highly transparent ZGO:Cr spinel glass ceramics. Optical Materials Express, 12(8), 3238-3247. https://doi.org/10.1364/OME.459185

MLA:

Cao, J. I. A. N. G. K. U. N., et al. "Mechanoluminescence from highly transparent ZGO:Cr spinel glass ceramics." Optical Materials Express 12.8 (2022): 3238-3247.

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