Revealing Lattice Defect Restoration in Graphene Oxide using Tip-Enhanced Raman Spectroscopy

使用尖端增强拉曼光谱揭示氧化石墨烯中的晶格缺陷修复

• 批准号: 20K15132
• 负责人: kanishka DeSilva
• 金额: $ 2.5万
• 依托单位: Toyota Technological Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20K15132/
• 关键词: Graphene oxide; Graphene; Restoration; TERS; Raman spectra; High-quality RGO; Defect restoration; Reduction; C-AFM; Tiling method; CH4 plasma; Graphene Oxide; Atomic Force Microscopy

During this final year, the applicant could achieve relatively good progress in research work. Directly related to the KAKENHI proposal, one paper as the 1st author and two papers as the co-author were published.First of all, continuous monolayer graphene oxide (GO) films were fabricated on substrates and reduced via a combined chemical and thermal reduction method to obtain highly reduced and conductive graphene films. Defect restoration was achieved through ethanol-assisted thermal annealing.Secondly, TERS probes with good enhancement factor were developed via a UV-ozone and chemical reduction method, which has good reproducibility and durability. They work very well under gap mode, yet not good enough for non-gap mode. So, graphene films transferred to Au substrate via PDMS-stamping.

在这最后一年，申请人的研究工作取得了较好的进展。与KAKENHI的提案直接相关的是，发表了1篇第一作者论文和2篇合著论文。首先，在基底上制备了连续单层氧化石墨烯（GO）薄膜，并通过化学还原和热还原相结合的方法还原得到高度还原的导电石墨烯薄膜。通过乙醇辅助热退火实现了缺陷的修复。其次，采用紫外-臭氧和化学还原法制备了增强因子良好的TERS探针，具有良好的重复性和耐久性。它们在间隙模式下工作得很好，但在非间隙模式下工作得不够好。因此，石墨烯薄膜转移到Au衬底通过PDMS冲压。

项目成果

Fabrication of graphene aerogel with controllable structural properties for efficient dye absorption

具有可控结构特性的石墨烯气凝胶的制备，可有效吸收染料

• 发表时间: 2021
• 作者: Toshiki Shimizu;K. Kanishka H. De Silva;Masanori Hara;Masamichi Yoshimura
• 通讯作者: Masamichi Yoshimura

Thermal reduction of graphene oxide and polyethyleneimine composite membranes with selective ion permeability

热还原氧化石墨烯和聚乙烯亚胺选择性离子渗透复合膜

• DOI: 10.35848/1347-4065/ac8389
• 发表时间: 2022
• 期刊: Japanese Journal of Applied Physics
• 影响因子: 1.5
• 作者: Fukaya Norihiro;De Silva K. Kanishka H.;Yoshimura Masamichi;Tanaka Hiroya
• 通讯作者: Tanaka Hiroya

Organic Ferroelectric Tunnel Junctions at Nanoscale

纳米级有机铁电隧道结

• 发表时间: 2021
• 作者: P. Viswanath;T. Ikeda;L.S.R. Kumara;T. Koganezawa;V. Kesava Rao;K. K. H. De Silva and M. Yoshimura
• 通讯作者: K. K. H. De Silva and M. Yoshimura

Synthesis of Germanene at the Graphene/Ag(111) interface

石墨烯/Ag(111)界面上锗烯的合成

• 发表时间: 2020
• 作者: 鈴木 誠也;岩崎 拓哉;K. Kanishka H. De Silva;末原 茂;渡邊 賢司;谷口 尚;森山 悟士;吉村 雅満;相澤 俊;中山 知信
• 通讯作者: 中山 知信

Effect of the substrate on the Raman spectra of reduced graphene oxide flakes

基质对还原氧化石墨烯薄片拉曼光谱的影响

• 发表时间: 2020
• 作者: K. Kanishka H. De Silva;Seiya Suzuki;Pamarti Viswanath;Masamichi Yoshimura
• 通讯作者: Masamichi Yoshimura