title: DNA-Assisted Solubilization of Carbon Nanotubes and Construction of DNA-MWCNT Cross-Linked Hybrid Hydrogels.
abstract: A simple method for preparation of DNA-carbon nanotubes hybrid hydrogel based on a two-step procedure including: (i) solubilization of multi-walled carbon nanotubes (MWCNT) in aqueous solution of DNA, and (ii) chemical cross-linking between solubilized MWCNT via adsorbed DNA and free DNA by ethylene glycol diglycidyl ether is reported. We show that there exists a critical concentration of MWCNT below which a homogeneous dispersion of MWCNT in hybrid hydrogel can be achieved, while at higher concentrations of MWCNT the aggregation of MWCNT inside hydrogel occurs. The strengthening effect of carbon nanotube in the process of hydrogel shrinking in solutions with high salt concentration was demonstrated and significant passivation of MWCNT adsorption properties towards low-molecular-weight aromatic binders due to DNA adsorption on MWCNT surface was revealed.
authors.affiliation: Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan. zinchenko@urban.env.nagoya-u.ac.jp.
authors.forename: Anatoly
authors.initials: A
authors.lastname: Zinchenko
authors.affiliation: Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan. vegetable.day.831@gmail.com.
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Taki
authors.affiliation: Department of Polymer Science, Faculty of Chemistry, Moscow State University, Moscow 119899, Russia. sergeyev@genebee.msu.ru.
authors.forename: Vladimir G
authors.initials: VG
authors.lastname: Sergeyev
authors.affiliation: Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan. murata@urban.env.nagoya-u.ac.jp.
authors.forename: Shizuaki
authors.initials: S
authors.lastname: Murata
keywords: DNA; carbon nanotube; hybrid hydrogel; hydrogel; multi-walled carbon nanotubes (MWCNT)