TY - JOUR
T1 - Controlling the quality of SiO2 colloidal crystals by temperature ramping on the vertical convective self-assembly method
AU - Castañeda-Uribe, Octavio A.
AU - Méndez-Pinzón, Henry A.
AU - Salcedo-Reyes, Juan C.
N1 - Funding Information:
Acknowledgments. The authors greatly acknowledge the support from Minciencias/Colciencias with the 2019 postdoctoral program#848, the department of Physics of Pontificia Universidad Javeriana, and the research facilities of the Thin Films & Nanophotonics Group.
Publisher Copyright:
© 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
PY - 2021/8/1
Y1 - 2021/8/1
N2 - 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.
AB - 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.
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U2 - 10.1364/OME.428522
DO - 10.1364/OME.428522
M3 - Article
AN - SCOPUS:85111967934
SN - 2159-3930
VL - 11
SP - 2686
EP - 2699
JO - Optical Materials Express
JF - Optical Materials Express
IS - 8
ER -