Enzymatic formation of carbohydrate rings catalyzed by single-walled carbon nanotubes

Moon Seop Hyun, Jong Pil Park, Dongkyun Seo, Sung Jin Chang, Seok Jae Lee, Sang Yup Lee, Kyungwon Kwak, Tae Jung Park

Research output: Contribution to journalArticle

Abstract

Macrocyclic carbohydrate rings were formed via enzymatic reactions around single-walled carbon nanotubes (SWNTs) as a catalyst. Cyclodextrin glucanotransferase, starch substrate and SWNTs were reacted in buffer solution to yield cyclodextrin (CD) rings wrapped around individual SWNTs. Atomic force microscopy showed the resulting complexes to be rings of 12–50 nm in diameter, which were highly soluble and dispersed in aqueous solution. They were further characterized by Raman and Fourier transform infrared spectroscopy and molecular simulation using density functional theory calculation. In the absence of SWNT, hydrogen bonding between glucose units determines the structure of maltose (the precursor of CD) and produces the curvature along the glucose chain. Wrapping SWNT along the short axis was preferred with curvature in the presence of SWNTs and with the hydrophobic interactions between the SWNTs and CD molecules. This synthetic approach may be useful for the functionalization of carbon nanotubes for development of nanostructures.

Original languageEnglish
Pages (from-to)725-733
Number of pages9
JournalBioprocess and Biosystems Engineering
Volume39
Issue number5
DOIs
Publication statusPublished - 2016 May 1

Keywords

  • Cyclodextrin-ring
  • Nanocomposite
  • Single-walled carbon nanotubes
  • Surface functionalization

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering

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