Tunable, colorimetric DNA-based pH sensors mediated by A-motif formation.

Tunable, colorimetric DNA-based pH sensors mediated by A-motif formation.

Chemical communications (Cambridge, England) (2012-01-27)

Sonali Saha, Kasturi Chakraborty, Yamuna Krishnan

摘要

A colorimetric pH sensor has been developed based on GNP aggregation mediated by A-motif formation under acidic conditions. The pH response of the sensor can be tuned in the range of pH 2-5.5 by changing the length and the sequence of the A-motif forming poly dA tracts.