title: Self-assembly of J-aggregate nanotubes and their applications for sensing dopamine.
abstract: J-aggregates are an attractive supramolecular structure with interesting excitation properties found in the light-harvesting antenna of green sulfur bacteria. To structurally mimic the light-harvesting antenna, we synthesize J-aggregate nanotubes with a sharp and intense absorption band (J-band) by the coassembly of lithocholic acid (LCA) and 3,3'-dipropylthiadicarbocyanine iodide (DiSC3(5)) in aqueous solution. We show that the J-aggregate nanotubes can be used as a supramolecular probe for the sensitive and selective detection of dopamine (DA) in phosphate buffered saline (PBS) solution with the detection limit of ∼0.4 nM by simply observing the intensity change of the J-band due to the efficient photoinduced electron transfer from the J-aggregate nanotubes to the adsorbed DA.
authors.affiliation: Department of Materials Science and Engineering and ‡College of Optics and Photonics, University of Central Florida , Orlando, Florida 32816, United States.
authors.forename: Weilang
authors.initials: W
authors.lastname: Liang
authors.forename: Sihui
authors.initials: S
authors.lastname: He
authors.forename: Jiyu
authors.initials: J
authors.lastname: Fang
mesh_terms: D000327:Adsorption; D004298:Dopamine / Q000032:analysis*; D015394:Molecular Structure; D043942:Nanotubes / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D004298:Dopamine