Abstract
We describe a novel excimer laser-based route for the fabrication of crystalline MoS2 nanoneedles. Laser annealing of MoS2 thin films at a low energy density of 0.08 Jcm−2 resulted in a closed-pack structure with low defects and excellent conductivity due to melting and rapid quenching. A further increase in laser annealing energy density resulted in the formation of MoS2 nano-needles. This structure of MoS2 was found to have a remarkable reduction ability for H2O2 at − 0.14 V over a wide linear range; a low detection limit (0.45 nM (S/N = 3)) and sensitivity of 2.38 μA/mM cm−2 were demonstrated.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgments
The authors would like to acknowledge support from National Science Foundation awards #1836767 and #2029974. We appreciate the help of Bella Ruiz, an undergraduate student, for assistance with the schematic figure.
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Joshi, P., Shukla, S., Gupta, S. et al. Synthesis of laser-patterned MoS2 nanoneedles for advanced electrochemical sensing. MRS Communications 13, 554–560 (2023). https://doi.org/10.1557/s43579-023-00381-y
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DOI: https://doi.org/10.1557/s43579-023-00381-y