Back to Search
Start Over
Electroactive gold nanoparticles protected by 4-ferrocene thiophenol monolayer
- Source :
- Journal of colloid and interface science. 264(1)
- Publication Year :
- 2003
-
Abstract
- Numerous reports have focused on ferrocene-terminated electroactive self-assembled monolayers (SAMs) on a flat Au surface but only a few on ferrocene SAMs on Au colloid. In this paper, we employ 4-ferrocene thiophenol as a novel capping agent to produce electroactive gold nanoparticles in consideration of the peculiar pi-conjugated structure. Transmission electron microscopy shows the narrow-dispersed gold core with an average core diameter of ca. 2.5 nm. UV/vis spectra examine the pi-conjugated structure of 4-ferrocene thiophenol and surface plasmon absorbance of the indicated gold nanoparticles. X-ray photoelectron spectroscopy reveals electronic properties of the Au core and thiol ligands. Electrochemical measurement shows that the oxidation peak current is proportional to the scan rate, indicating the electrode process is controlled by adsorbed layer reaction. The formal potential of the Fc-MPCs is compared with that of free ferrocene in MeCN solution and the Fc-SAMs. The shifts are attributed to the phenyl moiety in the 4-ferrocene thiophenol and dielectric constant of the solvation environment.
- Subjects :
- Thiophenol
Analytical chemistry
Nanoparticle
Self-assembled monolayer
Photochemistry
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Biomaterials
chemistry.chemical_compound
Colloid and Surface Chemistry
chemistry
X-ray photoelectron spectroscopy
Ferrocene
Colloidal gold
Monolayer
Self-assembly
Subjects
Details
- ISSN :
- 00219797
- Volume :
- 264
- Issue :
- 1
- Database :
- OpenAIRE
- Journal :
- Journal of colloid and interface science
- Accession number :
- edsair.doi.dedup.....04a4162f3f9a98fd08d85cf28557773d