title: Organic-free colloidal semiconductor nanocrystals as luminescent sensors for metal ions and nitroaromatic explosives.
abstract: Exposed surfaces of organic-free colloidal semiconductor nanocrystals act as generic luminescent sensors for multiple analytes. S(2-) capped CdSe/CdSeS/CdS core/gradient-shell/shell nanocrystals are turn-on sensors for Cd(2+) ions (110 pM) in an aqueous medium with physiological pH 7.4. A similar organic-free semiconductor nanocrystal shows luminescence turn-off sensing for 2,4,6-trinitrophenol, a known explosive.
authors.affiliation: Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune, India - 411008. angshuman@iiserpune.ac.in.
authors.forename: Abhishek
authors.initials: A
authors.lastname: Swarnkar
authors.forename: G Shiva
authors.initials: GS
authors.lastname: Shanker
authors.forename: Angshuman
authors.initials: A
authors.lastname: Nag
mesh_terms: D002104:Cadmium / Q000032:analysis*; D003102:Colloids / Q000737:chemistry*; D053834:Explosive Agents / Q000032:analysis*; D049408:Luminescent Agents / Q000737:chemistry*; D010851:Picrates / Q000032:analysis; D045663:Quantum Dots / Q000737:chemistry*; D014303:Trinitrotoluene / Q000032:analysis
chemical_list: D003102:Colloids; D053834:Explosive Agents; D049408:Luminescent Agents; D010851:Picrates; D002104:Cadmium; D014303:Trinitrotoluene; C005858:picric acid