TY - JOUR AU - Seo, Dong‑Bum AU - Trung, Tran Nam AU - Kim, Dong‑Ok AU - Duc, Duong Viet AU - Hong, Sungmin AU - Sohn, Youngku AU - Jeong, Jong‑Ryul AU - Kim, Eui‑Tae PY - 2020/08/25 Y2 - 2024/03/28 TI - Plasmonic Ag-Decorated Few-Layer MoS2 Nanosheets Vertically Grown on Graphene for Efficient Photoelectrochemical Water Splitting JF - Nano-Micro Letters JA - Nano-Micro Lett VL - 12 IS - SE - Articles DO - 10.1007/s40820-020-00512-3 UR - https://nmlett.org/index.php/nml/article/view/13 SP - 172 AB - <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> ER -