Carbon
Carbon
5 years ago

Effect of solvents on photonic crystallinity in graphene oxide dispersions

Effect of solvents on photonic crystallinity in graphene oxide dispersions
Structural color reflections from graphene oxide (GO) dispersions in binary mixtures of deionized water and organic solvents were obtained, and they were investigated at varying GO concentrations using three organic solvents: 1,4-dioxane, N-methyl-2-pyrrolidone (NMP), and dimethylformamide (DMF). Adding organic solvents in the aqueous GO dispersion changes the peak wavelength of the reflection spectrum and the purity of the reflection color, and in particular, the dependence of the peak wavelength on the GO concentration was more sensitive in the binary organic solvents than in pure water. This phenomenon can be explained by considering both the variations of the reflective index and the electrical screening effect in the binary solvents. However, only weak structural coloration based on the second order Bragg reflection was obtained in GO dispersions in pure DMF solvent, and even no structural coloration was observed in organic GO dispersions prepared using dried GO powder. These phenomena are related to the gelation at low concentration and the geometrical deformation of GO particles. Electrical switching of the structural color reflection was also demonstrated.

Publisher URL: www.sciencedirect.com/science

DOI: S0008622317307510

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.