Helical Pore Alignment on Cylindrical Carbon. Issue 2 (4th December 2019)

• Record Type: Journal Article
• Authors: Maruyama, Jun; Shinagawa, Tsutomu; Watanabe, Mitsuru; Kashiwagi, Yukiyasu; Maruyama, Shohei; Nagaoka, Toru; Matsuda, Wakana; Tsutsui, Yusuke; Seki, Shu; Uyama, Hiroshi
• Is Part Of: Small. Volume 16:Issue 2(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-12-04
• Subjects: carbon materials -- chirality -- circular dichroism -- mesoporous materials -- self‐assembly; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201905916
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Interest in chiral substances has mainly focused on the substances themselves, but not on the accompanying space, especially regarding the pore alignment. As a method to form both the chiral substance and the accompanying space, cylindrical self‐assembly of uniform polystyrene nanoparticles with fructose is carried out in the presence of both carbon and sodium alginate, which is followed by heat treatment in an inert atmosphere. The carbonization generates fructose‐derived honeycomb‐like carbon walls with helically aligned nanopores left after the polystyrene decomposition. The diffuse reflectance circular dichroism measurements give peaks with opposite signs for the d ‐ and l ‐fructose‐derived cylindrical carbons. Circularly polarized light sensitivity in transient photoconductivity is confirmed apparently in the carbon‐based helical structures. This sensitivity as well as straightforward formation of composites with another component to give helicity shows potential applications of the helically aligned pores. Abstract : Polystyrene nanoparticles cylindrically self‐assemble with fructose in the presence of both carbon nanofibers and sodium alginate. Carbonization generates fructose‐derived honeycomb‐like carbon walls with helically aligned nanopores left after the polystyrene decomposition. The diffuse reflectance circular dichroism measurement shows the chirality of the cylindrical carbon.