Title

Extinction Coefficient Of Gold Nanoparticles With Different Sizes And Different Capping Ligands

Keywords

Concentration; Extinction coefficient; Gold nanoparticle; Monolayer; Oleylamine

Abstract

Extinction coefficients of gold nanoparticles with core size ranging from ∼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 decanethiol-protected nanoparticle with a diameter of around 4 nm. A linear relationship between the logarithms of extinction coefficients and core diameters of gold 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. © 2006 Elsevier B.V. All rights reserved.

Publication Date

7-1-2007

Publication Title

Colloids and Surfaces B: Biointerfaces

Volume

58

Issue

1

Number of Pages

3-7

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.colsurfb.2006.08.005

Socpus ID

34249083492 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/34249083492

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