Preparation, characterization, and nonlinear optical properties of hybridized graphene @ gold nanorods nanocomposites

• Published in: Applied surface science Vol. 433; pp. 45 - 50
• Main Authors: Guo, Jia, Ning, Tingyin, Han, Yanshun, Sheng, Yingqiang, Li, Chonghui, Zhao, Xiaofei, Lu, Zhengyi, Man, Baoyuan, Jiao, Yang, Jiang, Shouzhen
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.03.2018
• Subjects: Gold nanorods; Graphene; Nanocomposites; Nonlinear optical responses; Open-aperture Z-scan technique; Gold nanorods; Nanocomposites; Nonlinear optical responses; Graphene; Open-aperture Z-scan technique
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2017.10.042

•We used a simple and inexpensive method to obtain the composite of graphene @ gold nanorods (G@GNRs).•We used a simple method to measure the nonlinear optical properties of the G@GNRs.•Compared with single graphene and GNRs, the G@GNRs nanocomposites exhibits many advantages. The methods of chemical vapor deposition (CVD) and seed-mediated growth were used to obtain graphene and gold nanorods (GNRs), respectively. We fabricate graphene @ gold nanorods (G@GNRs) nanocomposites by successively using dropping and transferring methods Through SEM, Raman spectra and TEM analysis, the number of graphene layers is 6–7. The diameter of gold nanorods (GNRs) is about 10nm and the average aspect ratio is 6.5. In addition, we systematically investigate their nonlinear optical responses by using open-aperture Z-scan technique. In contrast with graphene and GNRs, the G@GNRs nanocomposites exhibit excellent nonlinear optical response with a modulation depth of about 51% and a saturable intensity of about 6.23 GW/cm2. The results suggest that the G@GNRs nanocomposites could potentially be used as an optical modulator in pulsed laser generation.