Controlling the quality of SiO2 colloidal crystals by temperature ramping on the vertical convective self-assembly method

Octavio A. Castañeda-Uribe, Henry A. Méndez-Pinzón, Juan C. Salcedo-Reyes

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

Resumen

Traditionally, the vertical convective self-assembly method (VCSA) uses time-invariant temperature conditions to obtain high-quality colloidal crystal (CC) films, leaving unexplored possible effects due to temperature variations during the elaboration process. Here, the quality of colloidal crystal films grown by the VCSA method when applying temperature ramps is investigated. This study is conducted by combining experimental measurements and simulations of concentration profile and meniscus displacement, using the temperature dependent Kynch’s theory. The quality of the elaborated CC films is evaluated by analyzing the resulting optical Bragg diffraction. Colloidal crystal films deposited under controlled parameters showed that high-quality films can be achieved by positioning the meniscus into the uniform zone under temperature ramping, as a definite relation between sedimentation velocity and evaporation rate, in agreement with modelling results.

Idioma originalInglés estadounidense
Páginas (desde-hasta)2686-2699
Número de páginas14
PublicaciónOptical Materials Express
Volumen11
N.º8
DOI
EstadoPublicada - ago. 1 2021
Publicado de forma externa

Áreas temáticas de ASJC Scopus

  • Materiales electrónicos, ópticos y magnéticos

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