Group 6 Layered Transition-Metal Dichalcogenides in Lab-on-a-Chip Devices: 1T-Phase WS2 for Microfluidics Non-Enzymatic Detection of Hydrogen Peroxide

Rou Jun Toh, Carmen C. Mayorga-Martinez, Jongyoon Han, Zdenek Sofer, Martin Pumera

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


Two-dimensional (2D) layered transition-metal dichalcogenides (TMDs) have been placed in the spotlight for their advantageous properties for catalytic and sensing applications. However, little work is done to explore and exploit them in enhancing the performance of analytical lab-on-a-chip (LOC) devices. In this work, we demonstrate a simple, sensitive, and low-cost fabrication of electrochemical LOC microfluidic devices to be used for enzymatic detection. We integrated four t-BuLi exfoliated, group 6 TMD materials (MoS2, MoSe2, WS2, and WSe2) within the LOC devices by the drop-casting method and compared their performance for H2O2 detection. The 1T-phase WS2-based LOC device outperformed the rest of the TMD materials and exhibited a wide range of linear response (20 nM to 20 μM and 100 μM to 2 mM), low detection limit (2.0 nM), and good selectivity for applications in real sample analysis. This work may facilitate the expanded use of electrochemical LOC microfluidics, with its easier integrability, for applications in the field of biodiagnostics and sensing.

Original languageEnglish
Pages (from-to)4978-4985
Number of pages8
JournalAnalytical Chemistry
Issue number9
Publication statusPublished - 2017 May 2

Bibliographical note

Funding Information:
M.P. acknowledges a Tier 2 grant (MOE2013-T2-1-056; ARC 35/13) from the Ministry of Education, Singapore. R.J.T. and J.H. were also supported by the research grant for the Singapore-MIT Alliance for Research and Technology (SMART) centre (BioSyM IRG), funded by the National Research Foundation (NRF) of Singapore. Z.S was supported by the Czech Science Foundation (GACR No. 16-05167S).

Publisher Copyright:
© 2017 American Chemical Society.

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry


Dive into the research topics of 'Group 6 Layered Transition-Metal Dichalcogenides in Lab-on-a-Chip Devices: 1T-Phase WS<sub>2</sub> for Microfluidics Non-Enzymatic Detection of Hydrogen Peroxide'. Together they form a unique fingerprint.

Cite this