DLS setup for in-situ measurements of photo-induced size changes of microgel-based hybrid particles

Lehmann, M., Tabaka, W., Möller, T., Oppermann, A., Wöll, D., Volodkin, D. ORCID: 0000-0001-7474-5329, Wellert, S. and von Klitzing, R., 2018. DLS setup for in-situ measurements of photo-induced size changes of microgel-based hybrid particles. Langmuir, 34 (12), pp. 3597-3603. ISSN 0743-7463

[img]
Preview
Text
13887_Volodkin.pdf - Post-print

Download (3MB) | Preview

Abstract

Photoinduced size changes in microgel particles loaded with gold nanoparticles (AuNPs) were investigated with an extended multiangle dynamic light scattering (DLS) setup. The DLS setup was equipped with a conventional laser (λ = 633 nm) to determine the microgel particle size. Additionally, a laser (λ = 532 nm) is installed to study the photoresponsive behavior of the AuNP–microgel hybrids. The wavelength of 532 nm is close to the absorption maximum of the plasmon resonance of the AuNPs used in the present study (i.e. spherical AuNPs with a diameter of 14 nm). The extended DLS setup enables us to follow in situ the change in microgel size during irradiation. The light stimulus is directly correlated with the size changes of the hybrid particles and the photothermal effect depends on the intensity of the excitation laser. The increase in excitation laser intensity results in a size reduction of hybrid particles because of the ability of AuNPs to partially transform the absorbed photon energy into heat which is emitted into the surrounding microgel network.

Item Type: Journal article
Publication Title: Langmuir
Creators: Lehmann, M., Tabaka, W., Möller, T., Oppermann, A., Wöll, D., Volodkin, D., Wellert, S. and von Klitzing, R.
Publisher: American Chemical Society
Date: 2018
Volume: 34
Number: 12
ISSN: 0743-7463
Identifiers:
NumberType
10.1021/acs.langmuir.7b04298DOI
Divisions: Schools > School of Science and Technology
Depositing User: Jonathan Gallacher
Date Added: 07 May 2019 09:07
Last Modified: 07 May 2019 09:07
URI: http://irep.ntu.ac.uk/id/eprint/36422

Actions (login required)

Edit View Edit View

Views

Views per month over past year

Downloads

Downloads per month over past year