New Insights into the Triton X‐100 Induced Chemical Exfoliation of MoS₂ to Derive Highly Luminescent Nanosheets

Abstract

The exfoliation of two dimensional (2D) transition metal dichalcogenides (TMDs) into mono‐ or few‐layers without compromising their semiconductor properties has momentous interest for both point of view; fundamental studies and further implementation in practical applications. Herein, we reported a novel and inexpensive approach for high yield nanosheets from bulk MoS2 to few layers of strong luminescent MoS2 nanosheets using Triton X‐100 as a surfactant with tailoring the bulk band gap 1.2 eV to 1.79 eV of few layers of nanosheets after chemical exfoliation process, which can be easily scaled‐up in large quantity. The microstructural results reveal that the exfoliated nanosheets have thickness in the range of few layers and lateral dimension in the range of few hundred nanometers. Our findings may offer a new innovative one setup chemical exfoliation process to design a few layer of MoS2 nanosheets without suppressing luminescent properties, which is highly desirable for the next generation optoelectronic devices.

Hydrothermal synthesis of Bi2Se3 nanosheets by using gallic acid as a reductant

“…42 Triton X-100 has used successfully to control anisotropic crystal growth as morphology modulator and act as dispersing agent to prevent layer stacking of MoS 2 . 43 Here ultrathin Bi 2 Se 3 nanosheets with a dozen of nanometer thickness was synthesized when adding appropriate amounts of Triton X-100 in hydrothermal reaction system. First, the pure hexagonal Bi 2 Se 3 phase kept unchanged as implied in the XRD patterns after adding various amounts of Triton X-100 (Fig.…”

Liquid phase exfoliation of talc: effect of the medium on flake size and shape

“…The solution serves three purposes: it provides a medium to propagate the mechanical energy, suspends the exfoliated nanosheets, and prevents them from agglomerating again. The versatility of the method allows it to be employed to obtain nanoflakes of a collection of materials such as graphene [ 3 , 7 ], hexagonal boron nitride [ 8 ], transition metal dichalcogenides [ 9 ], and others [ 10 – 11 ].…”

Halide Perovskite Nanocrystal‐Enabled Stabilization of Transition Metal Dichalcogenide Nanosheets

“…[ 24,25 ] Non‐destructive LPE without affecting the inherent properties of pristine TMD nanosheets is required, which can be achieved using a variety of dispersants that can physically separate two adjacent nanosheets and thus mitigate the van der Waals interactions between two nanosheets, giving rise to stable suspensions of TMD nanosheets. Numerous dispersants, including surfactants, [ 26,27 ] ionic liquids, [ 28,29 ] and polymers, [ 30,31 ] have been successfully employed for the LPE of TMD nanosheets, and the resulting suspensions in diverse solvents have been used to develop solution‐processed photoelectronic and energy devices. [ 13,21–23 ] The utilization of such organic dispersants is, however, detrimental to the TMD performance because most of the dispersants are electrically insulating.…”