Engineering a 3D MoS2 foam using keratin exfoliated nanosheets

Agarwal, Vipul and Varghese, Neethu and Dasgupta, Subho and Sood, A K and Chatterjee, Kaushik (2019) Engineering a 3D MoS2 foam using keratin exfoliated nanosheets. In: CHEMICAL ENGINEERING JOURNAL, 374 . pp. 254-262.

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Abstract

Owing to their exceptional optical and electronic properties; two-dimensional transition metal dichalcogenides (TMDs) such as molybdenum disulfide (MoS2) have attracted immense research interest. However, the lack of an efficient route for large-scale production of nano-layered sheets with long shelf-life and colloidal stability to avoid their restacking upon drying poses a significant bottleneck in their widespread use limiting their utility in device fabrication especially in functional electronics. Here, we report a facile method to obtain the high-quality dispersion of nano-layered MoS2 nanosheets with exceptionally high yield of similar to 56%, long shelf life and excellent electronic properties, which was confirmed by the high conductivity values of 5 x 10(-4) S cm(-1) (much higher than the best reports) measured on the as-casted film. Moreover, we subsequently show that the exfoliated material can be transformed into a 3D MoS2 foam with intact optical properties confirmed from the presence of the band gap at similar to 2.1 eV, and photothermal behavior showing the increase of similar to 40 degrees C within 2 min of NIR irradiation making this material an attractive substrate for applications in catalysis, sensing and functional electronics.

Item Type:	Journal Article
Publication:	CHEMICAL ENGINEERING JOURNAL
Publisher:	ELSEVIER SCIENCE SA
Additional Information:	Copy right of the article is owned by ELSEVIER SCIENCE SA
Keywords:	Liquid exfoliation; Protein adsorption; MoS2; Transition metal dichalcogenides; 3D foam; Nanomaterials
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Physical & Mathematical Sciences > Physics
Date Deposited:	20 Sep 2019 11:46
Last Modified:	20 Sep 2019 11:46
URI:	http://eprints.iisc.ac.in/id/eprint/63438

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