title: Virgin silver nanoparticles as colorimetric nanoprobe for simultaneous detection of iodide and bromide ion in aqueous medium.
abstract: A simple colorimetric nanoprobe based on virgin silver nanoparticles (AgNPs) was developed for the selective detection of iodide and bromide ions via aggregation and anti-aggregation mechanism. With addition of I(-) ions, virgin AgNPs, in presence of Fe(3+), showed perceptible color change from yellow to colorless along with disappearance of surface plasmon resonance (SPR) band of AgNPs at 400 nm. But in presence of Cr(3+), AgNPs turned yellow upon addition of I(-)and Br(-) anions. The developed virgin AgNPs probe showed high specificity and selectivity with the detection limits down to 0.32 μM and 1.32 μM for I(-) ions via two different mechanistic routes. Also, the designed probe detects Br(-) with a detection limit down to 1.67 μM.
authors.affiliation: Department of Applied Chemistry, SV National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Shilpa
authors.initials: S
authors.lastname: Bothra
authors.affiliation: Department of Applied Chemistry, SV National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Rajender
authors.initials: R
authors.lastname: Kumar
authors.affiliation: Department of Applied Chemistry, SV National Institute of Technology (SVNIT), Surat 395007, India.
authors.forename: Ranjan K
authors.initials: RK
authors.lastname: Pati
authors.affiliation: School of Chemical Sciences, North Maharashtra University, Jalgaon (MS), India.
authors.forename: Anil
authors.initials: A
authors.lastname: Kuwar
authors.affiliation: Department of Applied Chemistry, Kyungpook National University, Daegu 702-701, South Korea.
authors.forename: Heung-Jin
authors.initials: HJ
authors.lastname: Choi
authors.affiliation: Department of Applied Chemistry, SV National Institute of Technology (SVNIT), Surat 395007, India; Department of Applied Chemistry, Kyungpook National University, Daegu 702-701, South Korea. Electronic address: suban_sahoo@rediffmail.com.
authors.forename: Suban K
authors.initials: SK
authors.lastname: Sahoo
mesh_terms: D000838:Anions; D001965:Bromides / Q000032:analysis*; D003124:Colorimetry / Q000379:methods*; D000067493:Dynamic Light Scattering; D007454:Iodides / Q000032:analysis*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D012834:Silver / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D000838:Anions; D001965:Bromides; D007454:Iodides; D014867:Water; D012834:Silver
keywords: AgNPs; Bromide; Colorimetric sensor; Iodide