Extinction coefficient of gold nanoparticles with different sizes and different capping ligands
Abbreviated Journal Title
Colloid Surf. B-Biointerfaces
gold nanoparticle; extinction coefficient; monolayer; concentration; oleylamine; RESONANCES; SCATTERING; CHEMISTRY; PROBES; DNA; Biophysics; Chemistry, Physical; Materials Science, Biomaterials
Extinction coefficients of gold nanoparticles with core size ranging from similar to 4 to 40 nm were determined by high resolution transmission electron microscopy analysis and UV-vis absorption spectroscopic measurement. Three different types of gold nanoparticles were prepared and studied: citrate-stabilized nanoparticles in five different sizes; oleylamide-protected gold nanoparticles with a core diameter of 8 nm, and a decanethiolprotected nanoparticles with a diameter of around 4 nm. A linear relationship between the logarithms of extinction coefficients and core diameters of bold particles was found independent of the capping ligands on the particle surface and the solvents used to dissolve the nanoparticles. This linear relation may be used as a calibration curve to determine the concentration or average size of an unknown nanoparticle or nanoparticle-biomolecule conjugate sample. (c) 2006 Elsevier B.V. All rights reserved.
Colloids and Surfaces B-Biointerfaces
Article; Proceedings Paper
"Extinction coefficient of gold nanoparticles with different sizes and different capping ligands" (2007). Faculty Bibliography 2000s. 7366.