*Article* **Effect of Gold Nanoparticles on the Crystallization and Optical Properties of Glass in ZnO-MgO-Al2O3-SiO2 System**

**Georgiy Shakhgildyan 1,\*, Veniamin Durymanov 2, Mariam Ziyatdinova 1,3, Grigoriy Atroshchenko 1, Nikita Golubev 1, Alexey Trifonov 4,5, Olga Chereuta 1, Leon Avakyan 2, Lusegen Bugaev <sup>2</sup> and Vladimir Sigaev <sup>1</sup>**


**Abstract:** Gold nanoparticles precipitated in transparent glass-ceramics could pave the way for the development of multifunctional materials that are in demand in modern photonics and optics. In this work, we explored the effect of gold nanoparticles on the crystallization, microstructure, and optical properties of ZnO-MgO-Al2O3-SiO2 glass containing TiO2 and ZrO2 as nucleating agents. X-ray diffraction, transmission electron microscopy, Raman, and optical spectroscopy were used for the study. We showed that gold nanoparticles have no effect on the formation of gahnite nanocrystals during the glass heat treatments, while optical properties of the glass-ceramics are strongly dependent on the gold addition. A computational model was developed to predict optical properties of glass during the crystallization, and the possibility for adjusting the localized surface plasmon resonance band position with the heat treatment temperature was shown.

**Keywords:** glass-ceramics; phase separation; nucleation; crystallization; microstructure; gahnite; gold nanoparticles; surface plasmon resonance; plasmonics
