Premium
Adsorption of pseudoisocyanine on silver bromide nanoparticles: Effect on the stability of the particles
Author(s) -
Jeunieau Laurence,
Nagy Janos B.
Publication year - 1998
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/(sici)1099-0739(199805)12:5<341::aid-aoc727>3.0.co;2-3
Subject(s) - chemistry , pulmonary surfactant , adsorption , bromide , nanoparticle , microemulsion , halide , molecule , dispersion (optics) , colloid , chemical engineering , heptane , dispersion stability , inorganic chemistry , organic chemistry , engineering , biochemistry , physics , optics
Pseudoisocyanine (PIC) was adsorbed on colloidal silver halide nanoparticles where it formed aggregates (J‐aggregates). The nanoparticles were prepared using a surfactant (AOT)/n‐heptane/water microemulsion. The molecules of pseudoisocyanine replaced the molecules of surfactant (AOT) on the surface of the nanoparticles and caused an instability of the silver bromide dispersion. The stability could be improved by two methods: either by using an adsorption inhibitor (e.g. p ‐xylene) or by adding another surfactant (CTAB). The adsorption has also been carried out at low temperature: the stability of the particles was then improved, and the J‐aggregates are smaller. © 1998 John Wiley & Sons, Ltd.