title: Reversible photoluminescence quenching of CdSe/ZnS quantum dots embedded in porous glass by ammonia vapor.
abstract: The photoluminescence response of semiconductor CdSe/ZnS quantum dots embedded in a borosilicate porous glass matrix to exposure to ammonia vapor is investigated. The formation of surface complexes on the quantum dots results in quenching of the photoluminescence and a shortening of the luminescence decay time. The process is reversible, desorption of ammonia molecules from the quantum dot surface causes the photoluminescence to recover. The sensitivity of the quantum dot luminescence intensity and decay time to the interaction time and the reversibility of the photoluminescence changes make the CdSe/ZnS quantum dots in porous glass system a candidate for use as an optical sensor of ammonia.
authors.affiliation: National Research University of Informational Technologies, Mechanics and Optics, 197101 St-Petersburg, Russia. a.o.orlova@gmail.com
authors.forename: A O
authors.initials: AO
authors.lastname: Orlova
authors.forename: Yu A
authors.initials: YA
authors.lastname: Gromova
authors.forename: V G
authors.initials: VG
authors.lastname: Maslov
authors.forename: O V
authors.initials: OV
authors.lastname: Andreeva
authors.forename: A V
authors.initials: AV
authors.lastname: Baranov
authors.forename: A V
authors.initials: AV
authors.lastname: Fedorov
authors.forename: A V
authors.initials: AV
authors.lastname: Prudnikau
authors.forename: M V
authors.initials: MV
authors.lastname: Artemyev
authors.forename: K
authors.initials: K
authors.lastname: Berwick