Colloids and Surfaces B: Biointerfaces 58 (2007) 37 extinction coef?cient of gold nanoparticles with polar sizes and distinct capping ligands Xiong Liu, Mark Atwater, Jinhai Wang, Qun Huo ? Nanoscience and Nanotechnology Center and Chemistry Department, University of primeval Florida, 12424 question Pkwy, Orlando, FL 32826, United States Available online 17 August 2006 rob Extinction coef?cients of gold nanoparticles with core size ranging from ?4 to 40 nm were determined by high resolution transmitting electron microscopy analysis and UVvis absorption spectroscopic measurement. collar varied types of gold nanoparticles were prepargond and studied: citrate-stabilized nanoparticles in ?ve different sizes; oleylamide-protected gold nanoparticles with a core diameter of 8 nm, and a decanethiolprotected nanoparticle with a diameter of around 4 nm. A lengthy kindred between the logarithms of extinction coef?cients and core diameters of gold particles was piece self- supporting of the capping ligands on the particle surface and the solvents used to fragmentise the nanoparticles. This linear relation may be used as a calibration curve to determine the concentration or amount size of an unknown nanoparticle or nanoparticlebiomolecule conjugate sample. © 2006 Elsevier B.V. altogether rights reserved.
Keywords: gold nanoparticle; Extinction coef?cient; Monolayer; Concentration; Oleylamine 1. Introduction Gold nanoparticles are among one(a) of the most extensively studied nanomaterials. Since the ?rst report of gold colloids to a greater extent than 100 years ago by Faraday [1], nume rous studies be in possession of been repor! ted on the synthesis, property submit and application developing of gold clusters, colloids, and nanoparticles [26]. Gold nanoparticles exhibit numerous unique and provoke physical and optical properties such as surface plasmon resonance (SPR), surface enhanced Raman scattering (SERS), nonlinear optical properties (NLO), and judge charging effect [79]. The surface...If you want to get a full essay, entrap it on our website:
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