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The use of imaging XPS to assess ligand binding to nanoparticles
Author(s) -
Kim Jeong Won,
Son Byoungchul,
Yu Hyunung,
Park Hyun Min,
Lee YounSeoung
Publication year - 2014
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.5404
Subject(s) - x ray photoelectron spectroscopy , nanoparticle , ligand (biochemistry) , molecule , substrate (aquarium) , materials science , nanotechnology , chemistry , analytical chemistry (journal) , chemical engineering , environmental chemistry , organic chemistry , biochemistry , receptor , oceanography , geology , engineering
A micro‐beam scanning X‐ray photoelectron spectroscopy (XPS) has been utilized to obtain information about the attachment of ligand to nanoparticles in solution by measuring the ligand components relative to nanoparticle components. CdSe/ZnS core/shell nanoparticles capped with three different kinds of ligand molecules are drop‐casted on a substrate and led to dry into self‐agglomerated micropatterns. Those specimens are mapped out by element‐sensitive XPS imaging. The spatial correlation between surface ligand molecules and core nanoparticle atoms is statistically analysed using Pearson correlation function, which provides with a useful assessment of the ligand binding to nanoparticle surfaces. Copyright © 2014 John Wiley & Sons, Ltd.