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Updated: Aug 30, 2025

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
Published on: November 1, 2013
Platinum-like HER onset in a GNR/MoS2 quantum dot heterostructure through curvature-dependent electron density
Aruna Narayanan Nair1, Mohamed F Sanad2, Venkata S N Chava1
1Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, Texas 79968, USA. sreenivasan@utep.edu.
Abstract:
Tailoring the curvature-directed lattice strain in GNRs along with optimal surface anchoring of molybdenum disulfide (MoS2) quantum dots (QDs) can lead to a unique heterostructure with Pt-like HER activity (onset potential -60 mV). The curvature-induced electronic charge redistribution at the curved region in the graphene nanoribbons allows a facile GNR-MoS2 interfacial charge transfer in the heterostructure, making the interfacial sulfur (S) more active towards the HER. The density functional theory (DFT) calculations confirmed electronically activated interfacial S-based catalytic centers in the curved GNR-based heterostructure leading to Pt-like HER activity.
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