Preparation of controllable-thickness 1T@2H-MoS₂ thin films by pulsed laser-induced synthesis and the selective separation of the 1T phase

Abstract

A novel synthetic method called pulsed laser induced synthesis to prepare MoS2 and to realize the phase separation.

Rapid In-Situ Synthesis and Patterning of Edge-Unsaturated MoS2 by Femtosecond Laser-Induced Photo-Chemical Reaction

“…Second, the solidified precursor can effectively prevent bubble pinning, which improves the continuity and stability of the FLDW process. Third, after spin coating, the precursor can be processed directly without tedious pretreatments such as sample baking. , …”

“…These additional required steps are usually time-consuming and are not economically viable. To address these issues and simplify the fabrication process, a laser-assisted thermal decomposition (LTD) method was reported. − In this method, the ammonium thiomolybdate in the precursor is decomposed by the localized laser-induced heating effect to form MoS 2 , and the patterning of MoS 2 is realized at the desired location by controlling the laser scanning path. Heng et al first applied the LTD method to synthesize and pattern MoS 2 /carbon hybrids on the centimeter scale using a precursor containing citric acid and ammonium thiomolybdate .…”

“…Heng et al first applied the LTD method to synthesize and pattern MoS 2 /carbon hybrids on the centimeter scale using a precursor containing citric acid and ammonium thiomolybdate . Since then, other research groups have improved the LTD method. − Hu et al realized the patterning of pure MoS 2 in a vacuum chamber and selectively synthesized 1T or 2H phase MoS 2 by adjusting the number of laser pulses . Andrea Marzo et al used a similar LTD method and precursor to prepare a microscale MoS 2 square on a SiO 2 /Si substrate in the open air .…”

“…19−22 Hu et al realized the patterning of pure MoS 2 in a vacuum chamber and selectively synthesized 1T or 2H phase MoS 2 by adjusting the number of laser pulses. 20 Andrea Marzo et al used a similar LTD method and precursor to prepare a microscale MoS 2 square on a SiO 2 /Si substrate in the open air. 22 Although the LTD method can realize the single-step in situ fabrication of MoS 2 patterns at a specific position on the substrate, this method still suffers from some serious issues that…”

Synthesis of two‐dimensional transition metal dichalcogenides for electronics and optoelectronics

“…Laser‐induced synthesis is a novel way to obtain TMDCs which has been attempted in recent years for its better controllability in growth process and convenience in device fabrication. Hu et al 67,68 introduced a method to induce the laser‐induced decomposition of precursor to produce MX 2 (MMo, W; XS, Se, Te) thin films deposited on the substrate utilizing the low thermal effect and photonic effect of ultraviolet laser. More importantly, this method has excellent controllability and the obtained films scale is up to 1.412 cm.…”