Millisecond Laser Ablation of Molybdenum Target in Reactive Gas toward MoS₂ Fullerene-Like Nanoparticles with Thermally Stable Photoresponse

Abstract

As a promising material for photoelectrical application, MoS2 has attracted extensive attention on its facile synthesis and unique properties. Herein, we explored a novel strategy of laser ablation to synthesize MoS2 fullerene-like nanoparticles (FL-NPs) with stable photoresponse under high temperature. Specifically, we employed a millisecond pulsed laser to ablate the molybdenum target in dimethyl trisulfide gas, and as a result, the molybdenum nanodroplets were ejected from the target and interacted with the highly reactive ambient gas to produce MoS2 FL-NPs. In contrast, the laser ablation in liquid could only produce core-shell nanoparticles. The crucial factors for controlling final nanostructures were found to be laser intensity, cooling rate, and gas reactivity. Finally, the MoS2 FL-NPs were assembled into a simple photoresponse device which exhibited excellent thermal stability, indicating their great potentialities for high-temperature photoelectrical applications.

Emerging 0D Transition‐Metal Dichalcogenides for Sensors, Biomedicine, and Clean Energy

“…Copyright 2015, Wiley–VCH. d) Reproduced with permission . Copyright 2015, American Chemical Society.…”

“…This resulted with the Mo nanodroplets which were subsequently ejected from the target and interacted with the highly reactive ambient gas to generate MoS 2 NPs. By varying laser intensity, cooling rate, and gas reactivity, different structures of MoS 2 nanostructures could be obtained (Figure d) …”

Synthesis of MoS 2 nanoparticles using MoO 3 nanobelts as precursor via a PVP-assisted hydrothermal method

“…As a typical layered transition metal dichalcogenide, molybdenum disulfide (MoS 2 ) materials have received much attention due to their potential applications in transistors of electronics [1], catalysts for hydrodesulfurization [2] and hydrogen evolution [3], candidates for hydrogen storage [4], tribological lubrient [5] and optical response [6], as well as electrode components for supercapacitors [7] and lithium batteries [8]. Meanwhile, MoS 2 nanomaterials with various morphologies such as open-ended nanotubes [9], hollow nanospheres [2], flower-like microspheres [10], nanorods [11] and nanoparticles [12] have been reported.…”

“…As a result, it is essential to synthesize MoS 2 with a nanoparticle morphology in a controlled manner. 6 and sulfur as initial materials with a homemade device [17]. Song et al obtained the MoS 2 nanoparticles by employing a millisecond pulsed Nd: YAG laser to ablate a piece of Mo target in a dimethyl trisulfide atmosphere [6].…”

“…6 and sulfur as initial materials with a homemade device [17]. Song et al obtained the MoS 2 nanoparticles by employing a millisecond pulsed Nd: YAG laser to ablate a piece of Mo target in a dimethyl trisulfide atmosphere [6]. However, these aforementioned methods suffer from problems of high temperatures, complicated procedures and harsh conditions, which may largely restrict their wide applications.…”