Interplay between internal structure and optical properties of thermosensitive nanogels

Ledesma-Motolinía, Mónica; Braibanti, Marco; Rojas-Ochoa, Luis F.; Haro-Pérez, Catalina

doi:10.1016/j.colsurfa.2015.07.020

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Journal article

Interplay between internal structure and optical properties of thermosensitive nanogels

Ledesma-Motolinía, Mónica Programa de Doctorado en Ciencias e Ingeniería de Materiales, Universidad Autónoma Metropolitana-Azcapotzalco, México D.F., Mexico
Braibanti, Marco Department of Physics, University of Fribourg, Switzerland
Rojas-Ochoa, Luis F. Departamento de Física, CINVESTAV-IPN, México D.F, Mexico
Haro-Pérez, Catalina Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana-Azcapotzalco, México D.F., Mexico

05.10.2015

Published in:

Colloids and Surfaces A: Physicochemical and Engineering Aspects. - 2015, vol. 482, p. 724–727

English The structural and optical properties of thermosensitive particles, nanogels, are studied by light scattering and refractometry as a function of temperature. Nanogels are composed of poly- N-Isopropopylacrylamide, a polymer that shrinks at temperatures higher than its lower critical solution temperature, 33 °C. The internal nanogel structure obtained by light scattering is well modeled by assuming a constant radial mass density profile convoluted with a Gaussian function. Moreover, we introduce a simple method that allows us to describe the measured temperature-dependent index of refraction of these complex nanoparticles by using their structural information, core dimension and external radius.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language