期刊
ACS APPLIED NANO MATERIALS
卷 2, 期 4, 页码 2184-2192出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.9b00151
关键词
graphene nanoribbons; substrate transfer; multiwavelength Raman spectroscopy; scanning tunneling microscopy; atomic force microscopy; optical properties
资金
- Swiss National Science Foundation [20PC21_155644]
- European Union's Horizon 2020 research and innovation programme [785219]
- Office of Naval Research BRC Program [N00014-12-1-1009]
- Eugene P. Wigner Fellowship
- Center for Nanophase Materials Sciences
- DFG's Center for Advancing Electronics Dresden (cfaed), EnhanceNano [391979941]
- European Social Fund (ESF-Project GRAPHD), TU Dresden
- Federal State of Saxony (ESF-Project GRAPHD), TU Dresden
- Max Planck Society
- CNPq, Brazil
- Empa-Horizon 2020 Marie Sldodowska-Curie action COFUND
- Swiss National Science Foundation (SNF) [20PC21_155644] Funding Source: Swiss National Science Foundation (SNF)
Recent progress in the on-surface synthesis of graphene nanoribbons (GNRs) has given access to atomically precise narrow GNRs with tunable electronic band gaps which makes them excellent candidates for room temperature switching devices such as field-effect transistors (FET). However, in spite of their exceptional properties, significant challenges remain for GNR processing and characterization. This contribution addresses some of the most important challenges, including GNR fabrication scalability, substrate transfer, long-term stability under ambient conditions, and ex situ characterization. We focus on 7- and 9-atom-wide armchair graphene nanoribbons (i.e., 7-AGNR and 9-AGNR) grown on 200 nm Au(111)/mica substrates using a high throughput system. Transfer of both 7- and 9-AGNRs from their Au growth substrate onto various target substrates for additional characterization is accomplished utilizing a polymer-free method that avoids residual contamination. This results in a homogeneous GNR film morphology with very few tears and wrinkles, as examined by atomic force microscopy. Raman spectroscopy indicates no significant degradation of GNR quality upon substrate transfer and reveals that GNRs have remarkable stability under ambient conditions over a 24 month period. The transferred GNRs are analyzed using multiwavelength Raman spectroscopy, which provides detailed insight into the wavelength dependence of the width-specific vibrational modes. Finally, we characterize the optical properties of 7- and 9-AGNRs via ultraviolet-isible (UV-vis) spectroscopy.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据