Synthesis and characterization of two-dimensional carbon dots decorated with molybdenum oxide nanoflakes with various phases

Abstract

The optical and morphological properties of the carbon dots (C-dots) decorated with reduced two-dimensional molybdenum oxide (MoO_3−x) nanoflakes were investigated. Two dimensional flakes of MoO_3−x were decorated with C-dots (C-dots@MoO_3−x) using a probe sonication process at room temperature. In the initial stage of the synthetic process, MoO₃ nanoflakes were studied before and after exfoliation. Furthermore, the optical and physical properties were studied and significant changes were found in the fabrication of the nanoflakes with varied sonication time intervals. The C-dots@MoO_3−x nanoflakes exhibit fluorescent property with maximum absorbance at longer wavelength (850 nm) in comparison to MoO_3−x nanoflakes.