5
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: not found

      Supramolecular self-assembly of graphene oxide and metal nanoparticles into stacked multilayers by means of a multitasking protein ring.

      Read this article at

      ScienceOpenPublisherPubMed
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Graphene oxide (GO) is rapidly emerging worldwide as a breakthrough precursor material for next-generation devices. However, this requires the transition of its two-dimensional layered structure into more accessible three-dimensional (3D) arrays. Peroxiredoxins (Prx) are a family of multitasking redox enzymes, self-assembling into ring-like architectures. Taking advantage of both their symmetric structure and function, 3D reduced GO-based composites are hereby built up. Results reveal that the "double-faced" Prx rings can adhere flat on single GO layers and partially reduce them by their sulfur-containing amino acids, driving their stacking into 3D multi-layer reduced GO-Prx composites. This process occurs in aqueous solution at a very low GO concentration, i.e. 0.2 mg ml(-1). Further, protein engineering allows the Prx ring to be enriched with metal binding sites inside its lumen. This feature is exploited to both capture presynthesized gold nanoparticles and grow in situ palladium nanoparticles paving the way to straightforward and "green" routes to 3D reduced GO-metal composite materials.

          Related collections

          Author and article information

          Journal
          Nanoscale
          Nanoscale
          Royal Society of Chemistry (RSC)
          2040-3372
          2040-3364
          Mar 28 2016
          : 8
          : 12
          Affiliations
          [1 ] Dept. of Life, Health and Environmental Sciences, University of L'Aquila, Italy. rodolfo.ippoliti@univaq.it francesco.angelucci@univaq.it.
          [2 ] Dept. of Physics and Chemistry, University of L'Aquila, Italy.
          [3 ] National Research Council of Italy, Institute for Microelectronics and Microsystems, Bologna, Italy.
          [4 ] National Research Council of Italy, Institute for Microelectronics and Microsystems, Bologna, Italy and National Research Council of Italy, Institute for Organic Synthesis and Photoelectronics, Bologna, Italy.
          [5 ] National Research Council of Italy, Institute for Organic Synthesis and Photoelectronics, Bologna, Italy.
          Article
          10.1039/c5nr08632a
          26952635
          0205b27f-b2dc-48c8-8573-748fac622ce1
          History

          Comments

          Comment on this article