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Tingchao He, Wei Wei, Lin Ma, Rui Chen, Shixin Wu, Hua Zhang, Yanhui Yang, Jan Ma, Ling Huang, Gagik G. Gurzadyan and Handong Sun Mechanism Studies on the Superior Optical Limiting Observed in Graphene Oxide Covalently Functionalized with Upconversion NaYF4:Yb3+/Er3+ Nanoparticles Small 8

Article first published online: 21 MAY 2012 | DOI: 10.1002/smll.201200249

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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.

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