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Density Determination of Au Nanoparticles Using Single Particle ICP‐MS
Author(s) -
Joo Nayoung,
Lim H. B.
Publication year - 2019
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.11875
Subject(s) - analytical chemistry (journal) , inductively coupled plasma mass spectrometry , nanoparticle , particle size , dwell time , transmission electron microscopy , particle (ecology) , materials science , scanning electron microscope , saturation (graph theory) , inductively coupled plasma , mass spectrometry , chemistry , nanotechnology , chromatography , plasma , physics , medicine , clinical psychology , oceanography , mathematics , combinatorics , quantum mechanics , geology , composite material
In this work, the densities of Au nanoparticles (NPs) were determined by single particle (sp) inductively coupled plasma‐mass spectrometry (ICP‐MS). Single particle measurement at low concentration with a dwell time of 100 μs showed good agreement with the size measured by scanning and transmission electron microscopy (SEM and TEM). The size of Au nanoparticles up to 100 nm showed linear function with the measured counts, while 250 and 400 nm particles required signal suppression due to signal saturation. The density of Au NPs was estimated, based on the particle size measured using TEM. From four repeated measurement sets, the averaged densities of 50 and 100 nm Au NPs were determined to be 21.9 (±18.3%) and 20.8 (±11.0%) g/cm 3 , respectively, which were slightly larger than the bulk density of Au, 19.3 g/cm 3 .