title: A simple and sensitive colorimetric pH meter based on DNA conformational switch and gold nanoparticle aggregation.
abstract: A simple and rapid colorimetric pH meter has been developed based on the conformational switch of i-motif DNA and non-crosslinking AuNP aggregation, the average accuracy of the nano-meter was found to be +/-0.04 pH unit across the physiological operating range.
authors.affiliation: State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022.
authors.forename: Cuie
authors.initials: C
authors.lastname: Chen
authors.forename: Guangtao
authors.initials: G
authors.lastname: Song
authors.forename: Jinsong
authors.initials: J
authors.lastname: Ren
authors.forename: Xiaogang
authors.initials: X
authors.lastname: Qu
mesh_terms: D003124:Colorimetry; D004247:DNA / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D053768:Metal Nanoparticles / Q000737:chemistry*; D009690:Nucleic Acid Conformation; D012680:Sensitivity and Specificity; D013053:Spectrophotometry
chemical_list: D006046:Gold; D004247:DNA