Hybridization Kinetics and Thermodynamics of DNA Adsorbed to Individually Dispersed Single‐Walled Carbon Nanotubes
作者： Esther S. Jeng , Paul W. Barone , John D. Nelson , Michael S. Strano
关键词:
摘要: Hybridization of DNA adsorbed to single-walled carbon nanotubes in solution has much slower kinetics than free DNA, and can be detected through a blue shift the near-infrared nanotube fluorescence. Adsorption receptor strand surface is consistent with models polyelectrolyte adsorption on charged surfaces, introducing both entropic (46.8 cal mol(-1) K(-1)) activation energy (20.4 kcal mol(-1)) barriers hybridization, which are greater values (31.9 K(-1) 12.9 at 25 degrees C. The increased hybridization result exceedingly slow for t(1/2)=3.4 h, compared value t(1/2)=4 min. These results have significant implications nanowire biosensors.
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