title: Tunable, colorimetric DNA-based pH sensors mediated by A-motif formation.
abstract: 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.
authors.affiliation: National Centre for Biological Sciences, TIFR, GKVK, Bellary Road, Bangalore 560065, India.
authors.forename: Sonali
authors.initials: S
authors.lastname: Saha
authors.forename: Kasturi
authors.initials: K
authors.lastname: Chakraborty
authors.forename: Yamuna
authors.initials: Y
authors.lastname: Krishnan
mesh_terms: D003124:Colorimetry / Q000379:methods*; D004247:DNA / Q000737:chemistry* / Q000235:genetics*; D006046:Gold / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry; D059372:Nucleotide Motifs; D011061:Poly A / Q000737:chemistry / Q000235:genetics
chemical_list: D011061:Poly A; C015465:poly(dA); D006046:Gold; D004247:DNA