Stepwise Reduction of Immobilized Mono layer Graphene Oxides
文献类型：期刊论文
| 作者 | Petersen, Soren1,2; He, Yudong3; Lang, Jiang3; Pizzocchero, Filippo4; Bovet, Nicolas1,2; Boggild, Peter4; Hu, Wenping3; Laursen, Bo W.1,2 |
| 刊名 | CHEMISTRY OF MATERIALS
 |
| 出版日期 | 2013-12-24 |
| 卷号 | 25期号:24页码:4839-4848 |
| 关键词 | Graphene Reduced Graphene Oxide Chemically Converted Graphene Oxide Langmuir-blodgett |
| ISSN号 | 0897-4756 |
| DOI | 10.1021/cm4015942 |
| 英文摘要 | Chemically converted graphene is highly relevant for transparent conducting film applications such as display and photovoltaic uses. So far, the major obstacle for realizing the potential has been to fully reduce/deoxygenate the graphene oxide (GO), which is challenging in part due to the pronounced aggregation that accompanies deoxygenation of GO in solution. Surface immobilization of monolayered graphene oxide (mGO) in Langmuir-Blodgett (LB) films was investigated as a method to circumvent this problem. Two types of LB films with different density of mGO flakes were prepared, i.e., diluted and coherent, and efficiently deoxygenated in a three-step reduction procedure involving subsequent treatment with hydrazine in dimethylformamide (DMF), sulfuric acid, and high temperature annealing. The stepwise reduction process was evaluated with optical microscopy, Raman microscopy, X-ray photoelectron spectroscopy (XPS) along with electrical characterization. XPS measurements confirmed a full conversion into virtually oxygen-free chemically converted graphene. The electrical characterization revealed large variations in the conductivity for single sheets in the diluted LB films, with an average conductivity of 100 S/cm. A similar conductivity was found for macroscopic devices made from the coherent LB films with overlapping mGO sheets. The large variation in single sheets conductance is assigned to overoxidation of the GO leading to formation of holes, which cannot be recovered in the chemical reduction procedure. The study shows that the applied three-step reduction procedure is chemically complete and that the conductivity of this chemically converted graphene is limited by structural defects/holes rather than remaining oxygen functionalities. |
| 语种 | 英语 |
| WOS记录号 | WOS:000329137800002 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/42066]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Laursen, Bo W. |
| 作者单位 | 1.Univ Copenhagen, Nanosci Ctr, Copenhagen, Denmark 2.Univ Copenhagen, Dept Chem, DK-2100 Copenhagen, Denmark 3.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China 4.Tech Univ Denmark, DTU Nanotech, DK-2800 Lyngby, Denmark |
| 推荐引用方式 GB/T 7714 | Petersen, Soren,He, Yudong,Lang, Jiang,et al. Stepwise Reduction of Immobilized Mono layer Graphene Oxides[J]. CHEMISTRY OF MATERIALS,2013,25(24):4839-4848. |
| APA | Petersen, Soren.,He, Yudong.,Lang, Jiang.,Pizzocchero, Filippo.,Bovet, Nicolas.,...&Laursen, Bo W..(2013).Stepwise Reduction of Immobilized Mono layer Graphene Oxides.CHEMISTRY OF MATERIALS,25(24),4839-4848. |
| MLA | Petersen, Soren,et al."Stepwise Reduction of Immobilized Mono layer Graphene Oxides".CHEMISTRY OF MATERIALS 25.24(2013):4839-4848. |
入库方式： OAI收割
来源：化学研究所
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