Gold-polyaniline composites. Part II. Effects of nanometer sized particles.
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.
Smith
J Anthony
JA
Georgia Institute of Technology, School of Chemistry and Biochemistry, Atlanta, GA 30332-0400, USA.
Josowicz
Mira
M
Engelhard
Mark
M
Baer
Donald R
DR
Janata
Jirí
J
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
D000814:Aniline Compounds; D009942:Organometallic Compounds; C416807:polyaniline; D006046:Gold