An unexpected role of atomic oxygen dopants in Au evolution from clusters to a layer

Eunwook Jeong, Eun Ae Choi, Yoshifumi Ikoma, Seung Min Yu, Jong Seong Bae, Sang Geul Lee, Seung Zeon Han, Gun Hwan Lee, Jungheum Yun

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    Structure engineering is essential for manipulating the chemical, electrical, and optical properties of Au. However, it is challenging to design nanoscopic structures because no effective method is available to deviate from the intrinsic evolution behavior during and after synthesis via vapor deposition. Here, we propose an approach that utilizes the oxidation-induced clustering and layering of Au due to the strong O interference at the outmost surfaces of nanoscopic Au geometries. This promotes the evolution of Au clusters and layers that are highly wetted on their oxide supports. A 4-nm-thick epitaxial Au layer eventually evolved from the proposed growth mode, simultaneously exhibiting higher optical transparency than Ag, a near-bulk resistivity of 8 × 10−8 Ω m, and extreme resilience to chemical corrosion and mechanical deformation. This result provides a definite solution to transparent metal electrodes that are highly vulnerable to degradation in ambient and working environments.

    Original languageEnglish
    Pages (from-to)277-289
    Number of pages13
    JournalActa Materialia
    Volume202
    DOIs
    Publication statusPublished - Jan 1 2021

    All Science Journal Classification (ASJC) codes

    • Electronic, Optical and Magnetic Materials
    • Ceramics and Composites
    • Polymers and Plastics
    • Metals and Alloys

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