1 Laboratory for the Physics of Advanced Materials, Department of Chemical and Material Engineering, Concordia University, 1550 De Maisonneuve Blvd. W., Montreal, Quebec H3G 2J2, Canada.
2 Concordia Center for Composites, Department of Mechanical, Industrial and Aerospace Engineering, Concordia University, 1550 De Maisonneuve Blvd. W., Montreal, Quebec H3G 2J2, Canada.

Quantum dots have unique size-dependent properties and promising applications. However, their use in many applications remains hindered by mechanical, thermal, and chemical instability and the lack of viable quantum dot mass-production processes. Embedding quantum dots in matrices such as silica counteracts the instability challenges in some applications while preserving their unique properties and applicability. Here, we synthesize quantum dots of four different metal oxides embedded in a silica matrix in a one-step mass-production process using flame spray pyrolysis.