title: Gold-polyaniline composites. Part II. Effects of nanometer sized particles.
abstract: The amount of electronic charge transferred between gold particles and polyaniline depends not only on the electron affinity of the two materials but also on the size of the gold particles. As measured by X-ray photoelectron spectroscopy, for particles < approximately 5 nm the binding energy of the electrons is size dependent. This "nano-effect" has its origin in the electrostatics of particles. It is demonstrated as a measurable shift of the binding energy of the Au(4f7/2) photoelectrons emitted from Au particles embedded in a polyaniline matrix. Gold nanoparticle size was evaluated by high resolution transmission electron microscopy.
authors.affiliation: Georgia Institute of Technology, School of Chemistry and Biochemistry, Atlanta, GA 30332-0400, USA.
authors.forename: J Anthony
authors.initials: JA
authors.lastname: Smith
authors.forename: Mira
authors.initials: M
authors.lastname: Josowicz
authors.forename: Mark
authors.initials: M
authors.lastname: Engelhard
authors.forename: Donald R
authors.initials: DR
authors.lastname: Baer
authors.forename: Jirí
authors.initials: J
authors.lastname: Janata
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D005069:Evaluation Studies as Topic; D006046:Gold / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission / Q000379:methods; D049329:Nanostructures / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D010316:Particle Size; D012680:Sensitivity and Specificity; D013052:Spectrometry, X-Ray Emission / Q000379:methods; D013499:Surface Properties; D013997:Time Factors
chemical_list: D000814:Aniline Compounds; D009942:Organometallic Compounds; C416807:polyaniline; D006046:Gold