BibTeX

@article{2209.00041v1,
Author        = {Lucas Sixdenier and Guillaume Baffou and Christophe Tribet and Emmanuelle Marie},
Title         = {Quantitative Microscale Thermometry in Droplets Loaded with Gold
  Nanoparticles},
Eprint        = {2209.00041v1},
ArchivePrefix = {arXiv},
PrimaryClass  = {cond-mat.soft},
Abstract      = {Gold nanoparticles (AuNPs) are increasingly used for their thermoplasmonic
properties, i.e. their ability to convert light into heat upon plasmon
resonance. However, measuring temperature gradients generated at the microscale
by assemblies of AuNPs remains challenging, especially when they are randomly
distributed in three dimensions. Here, we introduce a label-free thermometry
approach, combining optical wavefront microscopy and numerical simulations, to
infer the heating power dissipated by a three-dimensional model system
consisting in emulsion microdroplets loaded with AuNPs. This approach gives
access to the temperature reached in the core of droplets upon irradiation
without need of extrinsic calibration. These quantitative results are validated
qualitatively via the observation of the phase transition of a thermoresponsive
polymer added in the droplet as an in situ thermal probe. This versatile
thermometry approach is promising for non-invasive temperature measurements in
various three-dimensional microsystems involving AuNPs as colloidal heat
sources, such as several light-responsive drug delivery systems.},
Year          = {2022},
Month         = {Aug},
Url           = {http://arxiv.org/abs/2209.00041v1},
File          = {2209.00041v1.pdf}
}