Solvent-mediated assembly of atom-precise gold–silver nanoclusters to semiconducting one-dimensional materials

Peng Yuan, Ruihua Zhang, Elli Selenius, Pengpeng Ruan, Yangrong Yao, Yang Zhou, Sami Malola, Hannu Häkkinen (), Boon K. Teo, Yang Cao () and Nanfeng Zheng ()
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Peng Yuan: Xiamen University
Ruihua Zhang: Xiamen University
Elli Selenius: University of Jyväskylä
Pengpeng Ruan: Xiamen University
Yangrong Yao: Xiamen University
Yang Zhou: Xiamen University
Sami Malola: University of Jyväskylä
Hannu Häkkinen: University of Jyväskylä
Boon K. Teo: Xiamen University
Yang Cao: Xiamen University
Nanfeng Zheng: Xiamen University

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract 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 cm2 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.

Date: 2020
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DOI: 10.1038/s41467-020-16062-6

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