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Synthesis, optics and applications of plasmonic microcapsules
In this presentation, I will introduce a new type of colloidal plasmonic colorimetric sensor that allows the detection of strains in polymer films. The colloidal sensors are prepared by self-assembly of gold nanoparticles that stabilize a Pickering emulsion. The surface of the emulsion is solidified, enclosing the nanoparticles in a shell, forming colloidal capsules [1,2]. The capsules are then embedded in an elastomeric matrix and deformed under uniaxial stress. This deformation causes a change in the plasmonic response of the capsules, allowing the detection of deformations at the capsule scale. This study provides a robust and easily adaptable method to produce sensors that can potentially detect the presence of chemicals or small deformations at the micro- and nanoscale.
[1] Burel et al. Plasmonic Elastic Capsules as Colorimetric Reversible pH-Micrsensors. Small, 13 (2017)
[2] Burel et al. Plasmonic-Based Mechanochromic Reversible pH-Microsensors. Small, 16, e1903897 (2020)
5 octobre 2023
11:00
» 12:30
— Charpak