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• W2014294987 abstract "DNA adsorption onto polypyrrole (PPy) powder, a colloidal silica sol, and three polypyrrole–silica nanocomposite particles (untreated and amine- or carboxylic acid-functionalized) was investigated at neutral pH using sodium phosphate buffer. The extent of DNA adsorption was found to be 32 and 22 mg/g for the aminated silica sol and aminated PPy–silica particles respectively, and 6.5 mg/g for the carboxylated particles. DNA adsorption onto the unfunctionalized PPy–silica particles occurs to a lesser extent, whereas no adsorption was detected for the colloidal silica sol. Our results suggest that DNA adsorption is mainly governed by electrostatic and hydrophobic interactions. DNA is adsorbed onto polypyrrole chloride bulk powder and also onto the aminated PPy–silica particles, which both have cationic binding sites. The silica sol and the unfunctionalized PPy–silica particles both possess a net negative surface charge at this pH, which probably accounts for the zero or very low adsorbed amounts of DNA on these substrates. DNA adsorption onto the carboxylated PPy–silica particles may be enhanced by hydrogen bonding relative to the unfunctionalized polypyrrole–silica particles." @default.
• W2014294987 created "2016-06-24" @default.
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• W2014294987 date "1997-08-01" @default.
• W2014294987 modified "2023-10-01" @default.
• W2014294987 title "Adsorption of DNA onto Polypyrrole–Silica Nanocomposites" @default.
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• W2014294987 doi "https://doi.org/10.1006/jcis.1997.5000" @default.
• W2014294987 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/9268567" @default.
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