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Barin, G. B., Fairbrother, A., Rotach, L., Bayle, M., Paillet, M., Liang, L., Meunier, V., Hauert, R., Dumslaff, T., Narita, A., Muellen, K., Sahabudeen, H., Berger, R., Feng, X., Fasel, R. & Ruffieux, P. (2019) Surface-Synthesized Graphene Nanoribbons for Room Temperature Switching Devices: Substrate Transfer and ex Situ Characterization. Acs Applied Nano Materials, 2 2184–2192. 
Added by: Richard Baschera (2019-05-27 09:54:26)   Last edited by: Richard Baschera (2019-05-27 09:56:40)
Type de référence: Article
DOI: 10.1021/acsanm.9b00151
Clé BibTeX: Barin2019
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Créateurs: Barin, Bayle, Berger, Dumslaff, Fairbrother, Fasel, Feng, Hauert, Liang, Meunier, Muellen, Narita, Paillet, Rotach, Ruffieux, Sahabudeen
Collection: Acs Applied Nano Materials
Consultations : 2/320
Indice de consultation : 3%
Indice de popularité : 0.75%
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.
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