Controlled ultrasonic nebulization: a physical vapor deposition variant for low temperature and low growth rate of small molecule thin films
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Universidade Federal de Minas Gerais
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Artigo de periódico
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Ultrasonic nebulization is explored here as a resourceful technique for ultrathin film production technique for
small molecules. The method can be employed over a variety of substrates, particularly with low viscosity sol-
vents such as water. Specifically for water, spin coating is nearly prohibitive for molecules with a molecular
weight up to 1 kDa. However, there is a lack of quantitative results on the ultrasonic nebulization technique
when used for deposition in mild conditions that result in film growth. In this work, we study this growth
technique to produce ultrathin films of perylenetetracarboxylate derivatives over silica and hexagonal boron
nitride flakes. The morphology and physical characteristics of our films were evaluated using atomic force microscopy (AFM) and photoluminescence (PL). A physicochemical model is proposed to explain the overall shape
of the height distribution of the films as exponentially-modified Gaussian functions.
Abstract
Assunto
Filmes ultrafinos
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Ultrathin film deposition, Metal organic molecules, Mild conditions, Ultrasonic nebulization, Exponentially-modified Gaussian
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https://www.sciencedirect.com/science/article/pii/S1566119923001465?via%3Dihub