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The current design and understanding of graphene oxide (GO) and reduced GO (rGO) materials rely largely on insights derived from structurally defective and chemically inhomogeneous GO synthesized by Hummers’ method. As a result, this early-stage knowledge fails to fully exploit the potential benefits of GO. This study explores electrochemical approaches using highly crystalline Brodie’s GO for fabricating reduced GO (rGO)-based transparent conductive films (TCFs) without using toxic reducing agents or heat treatment. The study first demonstrates an in-plane electrochemical reduction method for fabricating rGO nanocoatings on plastic substrates. During this process, rGO at the rGO/GO/electrolyte three-phase interface functions as a growing cathode, inducing tandem reduction parallel to the insulating substrate surface. The crystallinity of the GO precursor determines the activation or deactivation of the three-phase interface at nanometer-scale thickness. The electrochemical reduction of epoxide groups leads to a well-extended π-electron network with suppressed local strains and carbon vacancies. The sheet resistivity of rGO-based TCFs was further optimized through hole doping via electrochemical FeCl3 intercalation, breaking the transparency–resistivity limit of available rGO-TCFs. These discoveries will facilitate the development of next-generation green graphene processes based on precise synthetic chemistry.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Graphene Oxide, reduced Graphene Oxide, Thin Film, green graphene processes

刊行年月日: 2025-07-25

出版者: Wiley

掲載誌:

• Advanced Functional Materials (ISSN: 1616301X) e10430

研究助成金:

• Japan Society for the Promotion of Science 24K01304

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1002/adfm.202510430

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更新時刻: 2025-12-01 12:30:07 +0900

MDRでの公開時刻: 2025-12-01 12:23:45 +0900