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DLS Setup for in Situ Measurements of Photoinduced Size Changes of Microgel-Based Hybrid Particles
Langmuir ( IF 3.7 ) Pub Date : 2018-03-04 00:00:00 , DOI: 10.1021/acs.langmuir.7b04298 Maren Lehmann 1 , Weronika Tabaka 1 , Tim Möller 1 , Alex Oppermann 2 , Dominik Wöll 2 , Dmitry Volodkin 3 , Stefan Wellert 1 , Regine von Klitzing 1, 4, 5
Langmuir ( IF 3.7 ) Pub Date : 2018-03-04 00:00:00 , DOI: 10.1021/acs.langmuir.7b04298 Maren Lehmann 1 , Weronika Tabaka 1 , Tim Möller 1 , Alex Oppermann 2 , Dominik Wöll 2 , Dmitry Volodkin 3 , Stefan Wellert 1 , Regine von Klitzing 1, 4, 5
Affiliation
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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.
中文翻译：
DLS设置，用于基于微凝胶的杂化颗粒的光诱导尺寸变化的原位测量
用扩展的多角度动态光散射（DLS）装置研究了载有金纳米颗粒（AuNPs）的微凝胶颗粒中的光诱导尺寸变化。DLS装置配备了常规激光器（λ= 633 nm），以确定微凝胶的粒径。此外，还安装了激光（λ= 532 nm），用于研究AuNP-微凝胶杂化体的光响应行为。532 nm的波长接近本研究中使用的AuNPs（即直径为14 nm的球形AuNPs）的等离激元共振的吸收最大值。扩展的DLS设置使我们能够在辐照过程中原位跟踪微凝胶尺寸的变化。光刺激与杂化颗粒的尺寸变化直接相关，光热效应取决于激发激光的强度。
更新日期：2018-03-04
中文翻译：
DLS设置，用于基于微凝胶的杂化颗粒的光诱导尺寸变化的原位测量
用扩展的多角度动态光散射（DLS）装置研究了载有金纳米颗粒（AuNPs）的微凝胶颗粒中的光诱导尺寸变化。DLS装置配备了常规激光器（λ= 633 nm），以确定微凝胶的粒径。此外，还安装了激光（λ= 532 nm），用于研究AuNP-微凝胶杂化体的光响应行为。532 nm的波长接近本研究中使用的AuNPs（即直径为14 nm的球形AuNPs）的等离激元共振的吸收最大值。扩展的DLS设置使我们能够在辐照过程中原位跟踪微凝胶尺寸的变化。光刺激与杂化颗粒的尺寸变化直接相关，光热效应取决于激发激光的强度。
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