title: Laser Light Induced Transformation of Molybdenum Disulphide-Based Nanoplatelet Arrays.
abstract: One-pot hydrothermal synthesis of MoS2nanoplatelet arrays on various substrates is perhaps the most promising approach to fabricate efficient electrocatalysts for hydrogen evolution reaction. However, the main challenges in this synthesis remain the purity and crystallinity of MoS2. In this study, we show for the first time that irradiation of amorphous, defect-rich MoS2nanoplatelets with a green nanosecond laser at a proper irradiation dose, ca ≤0.35 J cm-2, can significantly improve the crystallinity and purity of MoS2nanoplatelets. The effect was confirmed by Raman spectroscopy investigations demonstrating a surprising intensity increase of the A1gand modes after the laser irradiation. Further increase of irradiation energy, however, resulted in the photocorrosion and destruction of MoS2nanoplatelets. The variation of A1gand Raman mode intensities ratio depending on the green light irradiation dose was also presented and is discussed below.
authors.affiliation: State Research Institute Centre for Physical Sciences and Technology, Savanoriu Ave. 231, LT-02300 Vilnius, Lithuania.
authors.forename: Arūnas
authors.initials: A
authors.lastname: Jagminas
authors.affiliation: State Research Institute Centre for Physical Sciences and Technology, Savanoriu Ave. 231, LT-02300 Vilnius, Lithuania.|Vilnius University, Faculty of Physics, Sauletekio Ave. 9, LT-10222 Vilnius, Lithuania.
authors.forename: Gediminas
authors.initials: G
authors.lastname: Niaura
authors.affiliation: State Research Institute Centre for Physical Sciences and Technology, Savanoriu Ave. 231, LT-02300 Vilnius, Lithuania.
authors.forename: Rokas
authors.initials: R
authors.lastname: Žalnėravičius
authors.affiliation: State Research Institute Centre for Physical Sciences and Technology, Savanoriu Ave. 231, LT-02300 Vilnius, Lithuania.
authors.forename: Romualdas
authors.initials: R
authors.lastname: Trusovas
authors.affiliation: State Research Institute Centre for Physical Sciences and Technology, Savanoriu Ave. 231, LT-02300 Vilnius, Lithuania.
authors.forename: Gediminas
authors.initials: G
authors.lastname: Račiukaitis
authors.affiliation: State Research Institute Centre for Physical Sciences and Technology, Savanoriu Ave. 231, LT-02300 Vilnius, Lithuania.
authors.forename: Vitalija
authors.initials: V
authors.lastname: Jasulaitiene