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首页> 外文期刊>Nature Communications >Solvent-mediated assembly of atom-precise gold–silver nanoclusters to semiconducting one-dimensional materials
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Solvent-mediated assembly of atom-precise gold–silver nanoclusters to semiconducting one-dimensional materials

机译：溶剂介导的原子精细金银纳米团簇与半导体一维材料

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Bottom-up design of functional device components based on nanometer-sized building blocks relies on accurate control of their self-assembly behavior. Atom-precise metal nanoclusters are well-characterizable building blocks for designing tunable nanomaterials, but it has been challenging to achieve directed assembly to macroscopic functional cluster-based materials with highly anisotropic properties. Here, we discover a solvent-mediated assembly of 34-atom intermetallic gold-silver clusters protected by 20 1-ethynyladamantanes into 1D polymers with Ag-Au-Ag bonds between neighboring clusters as shown directly by the atomic structure from single-crystal X-ray diffraction analysis. Density functional theory calculations predict that the single crystals of cluster polymers have a band gap of about 1.3?eV. Field-effect transistors fabricated with single crystals of cluster polymers feature highly anisotropic p-type semiconductor properties with ≈1800-fold conductivity in the direction of the polymer as compared to cross directions, hole mobility of ≈0.02 cm 2 V -1 s -1 , and an ON/OFF ratio up to ≈4000. This performance holds promise for further design of functional cluster-based materials with highly anisotropic semiconducting properties.
机译：基于纳米尺寸构建块的功能装置组件的自下而上设计依赖于准确控制其自组装行为。原子精确的金属纳米团簇是用于设计可调纳米材料的良好特征的构建块，但是在具有高各向异位特性的基于宏观官能团的基础上实现了尖锐的组装，这一直挑战。在此，我们发现由201-乙炔基亚烷烷的34-原子金属间金银簇的溶剂介导的组装成1D聚合物，其与相邻簇之间的Ag-Au-Ag键，如来自单晶X-的原子结构直接所示。射线衍射分析。密度函数理论计算预测簇聚合物的单晶具有约1.3°的带隙。与串联聚合物的单晶制造的场效应晶体管具有高度各向异性的p型半导体性能，与横向，空穴迁移率为≈0.02cm2v -1 s -1的孔迁移率相比，具有≈1800倍的导电性。 ，和开/关比最多可达≈4000。该性能具有高度各向异性半导体特性的基于功能簇的材料的进一步设计。

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