杰纳斯
材料科学
制作
纳米技术
纳米颗粒
光致发光
石墨烯
胶体金
杰纳斯粒子
相(物质)
沉积(地质)
光电子学
化学
生物
医学
病理
古生物学
有机化学
替代医学
沉积物
作者
Natalia V. Vassilyeva,Alicia Forment‐Aliaga,Eugenio Coronado
出处
期刊:Small
[Wiley]
日期:2024-11-05
标识
DOI:10.1002/smll.202406599
摘要
Abstract Asymmetrically decorated nanoparticles (NPs), also known as “Janus nanoparticles”, possess at least two differently functionalized surfaces. This coexistence results in novel features that surpass the inherited benefits of the initial counterparts. Despite significant advances in spherical morphologies, research on Janus two‐dimensional (2D) materials is limited, as fabrication strategies primarily focus on dry deposition techniques. To produce Janus 2D materials in large quantities, solution‐based techniques are proposed. However, this approach remains largely unexplored for 2D materials other than graphene and its derivatives, and it yields Janus 2D materials in very low amounts. This study develops a liquid‐phase fabrication strategy for the asymmetric decoration of MoS 2 ultrathin layers with gold nanoparticles. This approach builds on previous advances in the asymmetric functionalization of spherical nanoparticles, using SiO 2 microbeads as a masking template. Interestingly, the photoluminescence (PL) spectrum of the processed material is unusually dominated by the B exciton emission. The reported versatile method has proven to be scalable, enabling the production of 2D Janus flakes in appreciable quantities, whether as 1T or 2H‐polytypes. Overall, the novel synthetic strategy is highly adaptable and can be extended to a variety of other 2D materials and functionalizing agents.
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