Electrochemical synthesis of luminescent MoS2 quantum dots

Deepesh Gopalakrishnan; Dijo Damien; Bo Li; Hemtej Gullappalli; Vijayamohanan K. Pillai; Pulickel M. Ajayan; Manikoth M. Shaijumon

doi:10.1039/C4CC09826A

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Electrochemical synthesis of luminescent MoS₂ quantum dots†

Deepesh Gopalakrishnan,‡^a Dijo Damien,‡^a Bo Li,

^b Hemtej Gullappalli,^b Vijayamohanan K. Pillai,^c Pulickel M. Ajayan^b and Manikoth M. Shaijumon*^a

Author affiliations

* Corresponding authors

^a Indian Institute of Science Education and Research Thiruvananthapuram, CET Campus, Sreekaryam, Thiruvananthapuram, Kerala, India
E-mail: shaiju@iisertvm.ac.in

^b Department of Materials Science and Nano Engineering, Rice University, Houston, Texas, USA

^c CSIR-Central Electro Chemical Research Institute, Karaikudi, Karaikudi, Tamilnadu, India

Abstract

Size-controlled synthesis of luminescent quantum dots of MoS₂ (≤2 layers) with narrow size distribution, ranging from 2.5 to 6 nm, from their bulk material using a unique electrochemical etching of bulk MoS₂ is demonstrated. Excitation-dependent photoluminescence emission is observed in the MoS₂ QDs. “As-synthesized” MoS₂ QDs also exhibit excellent electrocatalytic activity towards hydrogen evolution reactions.

This article is part of the themed collection: ChemComm 60th Anniversary Historic Papers from India

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Article information

DOI: https://doi.org/10.1039/C4CC09826A
Article type: Communication
Submitted: 09 Dec 2014
Accepted: 20 Jan 2015
First published: 21 Jan 2015

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Chem. Commun., 2015,51, 6293-6296

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Electrochemical synthesis of luminescent MoS₂ quantum dots

D. Gopalakrishnan, D. Damien, B. Li, H. Gullappalli, V. K. Pillai, P. M. Ajayan and M. M. Shaijumon, Chem. Commun., 2015, 51, 6293 DOI: 10.1039/C4CC09826A

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