Transition Metal Dichalcogenides Synthesis by Pulse Laser Ablation using Deep eutectic solvents

Primary Author

Ernesto Flores

Faculty Mentor

Dr. Kelly Nash

Abstract

The interest in the production of 2-dimensional semiconductor nanostructures based on transitional metal dichalcogenides, like molybdenum di-selenide (MoSe2), has been growing due to their optical and electronic properties. Pulsed laser ablation in liquid is a promising way of rapidly synthesizing transitional metal dichalcogenides (TMDC). PLAL consists in irradiate a bulk material with a laser source breaking the material which then self-aggregates in a liquid phase. This technique has some advantages over the most common chemical vapor deposition, since it is cheaper and do not require multiple steps, and eliminates waste of synthesis’ bi-products, making PLAL a greener alternative. However, it has the limitation that it can yield variants, which include molybdenum oxide (MoO3) affective the bonds on the material synthesized. To overcome this problem, the synthesis of MoSe2, by pulse laser ablation is done using deep eutectic solvents as a liquid phase. This helps to reduce the production of unwanted species like MoO3 during the synthesis by limiting the oxygen levels. The results of this work support the development of stable colloids of TMDCs in quantities that can readily be used in integrated into future applications which include biosensors and flexible electronics.

Presentation

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