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      Enhanced optical nonlinearity in noncovalently functionalized amphiphilic graphene composites

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      Author
      He, Tingchao
      Qi, Xiaoying
      Chen, Rui
      Wei, Jun
      Zhang, Hua
      Sun, Handong
      Date of Issue
      2012
      School
      School of Materials Science and Engineering
      School of Physical and Mathematical Sciences
      Related Organization
      A*STAR Singapore Institute of Manufacturing Technology
      Abstract
      The good solubility of graphene-based materials in various solvents without sacrificing their intrinsic properties is a prerequisite for their further applications. In particular, it is important for application as a practical optical limiter. A comprehensive study was conducted on the nonlinear optical property of a rationally designed amphiphilic graphene composite (PEG-OPE-rGO). By taking advantages of the unique energy diagram of this graphene composite, the optical limiting (OL) performances of PEG-OPE-rGO, which is either dissolved in solvents with moderate polarity or fabricated into thin solid films, are beyond the reported results for other graphene composites. Importantly, the main factors for the enhanced OL response of PEG-OPE-rGO are the multiphoton absorption and Förster resonance energy transfer process, instead of the nonlinear scattering mechanism observed for common nanostructured materials. The excellent OL response of PEG-OPE-rGO allows it to be one of the best candidates in practical optical limiters. Moreover, the mechanism analysis provides the deep insight for further optimization of the design of promising OL materials.
      Type
      Journal Article
      Series/Journal Title
      Chempluschem
      Collections
      • SPMS Journal Articles
      http://dx.doi.org/10.1002/cplu.201200113
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