近年来,随着单层石墨烯的发现,二维(Two-dimensional,2D)材料逐渐引起人们的重视,特别是二维过渡金属硫族化合物(Transition metal dichalcogenides,TMDs)由于其独特的结构和光电性能被广泛研究并取得许多成果。其中,二硫化铂(PtS_(2))...近年来,随着单层石墨烯的发现,二维(Two-dimensional,2D)材料逐渐引起人们的重视,特别是二维过渡金属硫族化合物(Transition metal dichalcogenides,TMDs)由于其独特的结构和光电性能被广泛研究并取得许多成果。其中,二硫化铂(PtS_(2))因具有带隙可调(体层0.25 eV到单层的1.75 eV)、高迁移率(1000 cm^(2)·V^(-1)·s^(-1))等诸多性质引起学者们的广泛关注。本文介绍了PtS_(2)的原子结构等基本特性,归纳了目前以机械剥离法、化学气相沉积(Chemical vapor deposition,CVD)法为主要制备方法制备PtS_(2)的特点,并分析了PtS_(2)能带结构与晶格振动等物性特点,阐述了PtS_(2)在场效应晶体管、光电探测器、光催化等领域取得的成果。最后对该材料目前还存在的问题进行分析与讨论,并对其未来的进一步发展进行了展望。展开更多
Two stages of platinum mineralization, i.e., the main stage contemporaneous with Cu-Ni sulfide ores and the hydrothermal stage are recognizable in the platinum-bearing Cu-Ni sulfide deposit under investigation. In add...Two stages of platinum mineralization, i.e., the main stage contemporaneous with Cu-Ni sulfide ores and the hydrothermal stage are recognizable in the platinum-bearing Cu-Ni sulfide deposit under investigation. In addition to antimonian michenerite-testibio palladite which occur in both stages, sperrylite, cooperite and osmian laurite are formed in the first stage and the presence of sudbryite and nicleoan sudbryite characterizes the second. Statistics shows different correlations among Cu, Ni, Pt, and Pd in the two stages.Being rich in Ni, the main stage exhibits a close correlation between Pt-, Pd-mineralization and Cu, with roughly equal tenors of Pt and Pd. During the second stage Cu is enriched, accompanied by increasingly strong mineralization of Pd while the mineralization of Pt is developed to a less extent and closely related with Ni. In the first stage the correlation between Pt and Os, Ru, Ir is notable, while that between Pd and Rh is intimate. According to occurrence, texture and structure of the sulfide ores, the main platinum mineralization is considered to have taken place through sulfide segregationinjection during magmatie stage. The second platinum mineralization is a typical hydrothermal process related with basic-ultrabasic magma.展开更多
文摘Two stages of platinum mineralization, i.e., the main stage contemporaneous with Cu-Ni sulfide ores and the hydrothermal stage are recognizable in the platinum-bearing Cu-Ni sulfide deposit under investigation. In addition to antimonian michenerite-testibio palladite which occur in both stages, sperrylite, cooperite and osmian laurite are formed in the first stage and the presence of sudbryite and nicleoan sudbryite characterizes the second. Statistics shows different correlations among Cu, Ni, Pt, and Pd in the two stages.Being rich in Ni, the main stage exhibits a close correlation between Pt-, Pd-mineralization and Cu, with roughly equal tenors of Pt and Pd. During the second stage Cu is enriched, accompanied by increasingly strong mineralization of Pd while the mineralization of Pt is developed to a less extent and closely related with Ni. In the first stage the correlation between Pt and Os, Ru, Ir is notable, while that between Pd and Rh is intimate. According to occurrence, texture and structure of the sulfide ores, the main platinum mineralization is considered to have taken place through sulfide segregationinjection during magmatie stage. The second platinum mineralization is a typical hydrothermal process related with basic-ultrabasic magma.
