Mechanism studies on the superior optical limiting observed in graphene oxide covalently functionalized with upconversion NaYF4:Yb3+/Er3+ nanoparticles

• Main Authors: He, Tingchao, Wei, Wei, Ma, Lin, Chen, Rui, Wu, Shixin, Zhang, Hua, Yang, Yanhui, Ma, Jan, Huang, Ling, Gurzadyan, Gagik G., Sun, Handong
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Article
• Language: English
• Published: 2013
• Online Access: https://hdl.handle.net/10356/96677; http://hdl.handle.net/10220/10386
• Institution: Nanyang Technological University

Superior optical limiting (OL) characteristics and mechanisms are explored in a novel nanocomposite made from graphene oxide (GO) and NaYF4:Yb3+/Er3+ nanoparticles via covalent chemical bonding. Due to the synergistic effect of enhanced nonlinear scattering, two-photon absorption, and efficient energy transfer between NaYF4:Yb3+/Er3+ nanoparticles and GO, the nanocomposite displays dramatically improved OL effects compared to either GO or NaYF4:Yb3+/Er3+ nanoparticles, making it a very promising material for practical OL devices.