DNA adsorption onto conducting polypyrrole

被引：95

作者：

Saoudi, B ^{[1
]}

Jammul, N ^{[1
]}

Abel, ML ^{[1
]}

Chehimi, MM ^{[1
]}

Dodin, G ^{[1
]}

机构：

[1] UNIV PARIS 07,INST TOPOL & DYNAM SYST,CNRS URA 34,F-75005 PARIS,FRANCE

来源：

SYNTHETIC METALS | 1997年 / 87卷 / 02期

关键词：

DNA; polypyrrole; adsorption; pH; buffer; ionic strength; dopant; affinity; cooperativity;

D O I：

10.1016/S0379-6779(96)03812-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Deoxyribonucleic acid (DNA) adsorption onto chemically synthesized polypyrrole powders was investigated as a function of pH, buffer nature, ionic strength and substrate nature. DNA adsorption was found to be in the range of 0.13-0.55 mg m(-2) for the conditions under investigation. Strong DNA adsorption was obtained at low pH and high ionic strength. The decreasing order of adsorption as a function of the native dopant was nitrate, chloride > sulfate. The isotherms were found to be of the Langmuir type or sigmoid, depending on the combination of (at least) substrate and buffer natures. Affinity constants determined using Scatchard and Hill plots were found to be as high as 10(6) M-1.

引用

页码：97 / 103

页数：7

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