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Lock‐In Thermography to Analyze Plasmonic Nanoparticle Dispersions
Author(s) -
Steinmetz Lukas,
TaladrizBlanco Patricia,
Geers Christoph,
SpuchCalvar Miguel,
Bonmarin Mathias,
Balog Sandor,
RothenRutishauser Barbara,
PetriFink Alke
Publication year - 2019
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201900224
Subject(s) - plasmon , thermography , dispersion (optics) , materials science , nanoparticle , absorption (acoustics) , nanotechnology , plasmonic nanoparticles , lock (firearm) , colloid , optoelectronics , optics , chemical engineering , infrared , composite material , mechanical engineering , physics , engineering
The physicochemical properties of nanoparticles (NPs) strongly rely on their colloidal stability, and any given dispersion can display remarkably different features, depending on whether it contains single particles or clusters. Thus, developing efficient experimental methods that are able to provide accurate and reproducible measures of the NP properties is a considerable challenge for both research and industrial development. By analyzing different NPs, through size and concentration, it is demonstrated that lock‐in thermography, based on light absorption and heat generation, is able to detect and differentiate the distinct aggregation and re‐dispersion behavior of plasmonic NPs, e.g., gold and silver. Most importantly, the approach is nonintrusive and potentially highly cost‐effective compared to standard analytical techniques.