Investigation of optical modulated conductance effects based on a graphene oxide–azobenzene hybrid

✍ Scribed by Xuequan Zhang; Yiyu Feng; Dong Huang; Yu Li; Wei Feng

• Book ID: 104009183
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 718 KB
• Volume: 48
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/j.carbon.2010.05.009

✦ Synopsis

An azobenzene (AZO) chromophore was covalently attached to graphene oxide (GO) through an amide linkage. The microstructure of the GO-AZO hybrid was characterized by microscopic and X-ray diffraction methods. An internal short-range ordered crystalline structure similar to graphite was observed. Spectroscopic evidence testified the strong electronic interactions between the AZO and GO in this GO-AZO hybrid system. Upon ultraviolet (UV) irradiation, the AZO moieties bonding on GO underwent a reversible trans-cis photoisomerization behavior. An optical modulated conductance of the GO-AZO film induced by the isomerization of the AZO chromophores was also monitored. The current showed a twofold increase after irradiation of UV light for 20 min.