@article{Seo_Trung_Kim_Duc_Hong_Sohn_Jeong_Kim_2020, title={Plasmonic Ag-Decorated Few-Layer MoS2 Nanosheets Vertically Grown on Graphene for Efficient Photoelectrochemical Water Splitting}, volume={12}, url={https://nmlett.org/index.php/nml/article/view/13}, DOI={10.1007/s40820-020-00512-3}, abstractNote={<p>A controllable approach that combines surface plasmon resonance and two-dimensional (2D) graphene/MoS<sub>2</sub> heterojunction has not been implemented despite its potential for efficient photoelectrochemical (PEC) water splitting. In this study, plasmonic Ag-decorated 2D MoS<sub>2</sub> nanosheets were vertically grown on graphene substrates in a practical large-scale manner through metalorganic chemical vapor deposition of MoS<sub>2</sub> and thermal evaporation of Ag. The plasmonic Ag-decorated MoS<sub>2</sub> nanosheets on graphene yielded up to 10 times higher photo-to-dark current ratio than MoS<sub>2</sub> nanosheets on indium tin oxide. The significantly enhanced PEC activity could be attributed to the synergetic effects of SPR and favorable graphene/2D MoS<sub>2</sub> heterojunction. Plasmonic Ag nanoparticles not only increased visible-light and near-infrared absorption of 2D MoS<sub>2</sub>, but also induced highly amplified local electric field intensity in 2D MoS<sub>2</sub>. In addition, the vertically aligned 2D MoS<sub>2</sub> on graphene acted as a desirable heterostructure for efficient separation and transportation of photo-generated carriers. This study provides a promising path for exploiting the full potential of 2D MoS<sub>2</sub> for practical large-scale and efficient PEC water-splitting applications.</p> <p>Highlights:</p> <p>1 Controllable and large-scale practical growth of plasmonic Ag-decorated vertically aligned 2D MoS<sub>2</sub> nanosheets on graphene.<br>2 Realization of the synergistic effects of surface plasmon resonance and favorable graphene/MoS<sub>2</sub> heterojunction to enhance the photoelectrochemical reactivity of 2D MoS<sub>2</sub>.</p>}, journal={Nano-Micro Letters}, author={Seo, Dong‑Bum and Trung, Tran Nam and Kim, Dong‑Ok and Duc, Duong Viet and Hong, Sungmin and Sohn, Youngku and Jeong, Jong‑Ryul and Kim, Eui‑Tae}, year={2020}, month={Aug.}, pages={172} }