Tungsten Diselenide Nanoparticles Produced Via Femtosecond Ablation for SERS and Theranostics Applications

Overview

Journal Nanomaterials (Basel)

Date 2025 Jan 10

PMID 39791764

Authors

Andrei Ushkov

Dmitriy Dyubo

Nadezhda Belozerova

Ivan Kazantsev

Dmitry Yakubovsky

Alexander Syuy

Gleb V Tikhonowski

Daniil Tselikov

Ilya Martynov

Georgy Ermolaev

Dmitriy Grudinin

Alexander Melentev

Anton A Popov

Alexander Chernov

Alexey D Bolshakov

Andrey A Vyshnevyy

Aleksey Arsenin

Andrei V Kabashin

Gleb I Tselikov

Valentyn Volkov

Affiliations

Soon will be listed here.

Abstract

Due to their high refractive index, record optical anisotropy and a set of excitonic transitions in visible range at a room temperature, transition metal dichalcogenides have gained much attention. Here, we adapted a femtosecond laser ablation for the synthesis of WSe nanoparticles (NPs) with diameters from 5 to 150 nm, which conserve the crystalline structure of the original bulk crystal. This method was chosen due to its inherently substrate-additive-free nature and a high output level. The obtained nanoparticles absorb light stronger than the bulk crystal thanks to the local field enhancement, and they have a much higher photothermal conversion than conventional Si nanospheres. The highly mobile colloidal state of produced NPs makes them flexible for further application-dependent manipulations, which we demonstrated by creating substrates for SERS sensors.

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