title: Control of a catalytic activity of gold nanoparticles embedded in DNA hydrogel by swelling/shrinking the hydrogel's matrix.
abstract: OBJECTIVE
  By incorporating catalytically active nanoparticles into polymeric hydrogel one can tune the catalytic activity of such a hybrid material by affecting the state of polymer matrix.
  
  
  METHODS
  Herein, hybrid hydrogel was prepared by metallization of DNA cross-liked hydrogel via absorption of gold precursor and reduction by NaBH4, and its catalytic activity under various swelling ratio was studied spectroscopically.
  
  
  RESULTS
  Catalytic activity of Au nanoparticles in hydrogel was shown to depend drastically on a swelling degree of hydrogel easily controlled by a change in an ionic strength of solution. Increase of the catalytic reaction rate was proportional to the volume of hybrid hydrogel indicating that diffusion of reactants toward catalytic centers inside hydrogel is crucial for the efficient catalysis by soft-matter-based hybrid material.
authors: Graduate School of Environmental Studies, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
authors: Yuxin
authors: Y
authors: Che
authors: Graduate School of Environmental Studies, Nagoya University, Chikusa, Nagoya 464-8601, Japan. Electronic address: zinchenko@urban.env.nagoya-u.ac.jp.
authors: Anatoly
authors: A
authors: Zinchenko
authors: Graduate School of Environmental Studies, Nagoya University, Chikusa, Nagoya 464-8601, Japan.
authors: Shizuaki
authors: S
authors: Murata
mesh_terms: D002384:Catalysis; D004247:DNA / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure
chemical_list: D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D006046:Gold; D004247:DNA
keywords: Catalysis; DNA; Gold nanoparticles; Hydrogel