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. Author manuscript; available in PMC: 2022 Dec 15.
Published in final edited form as: Sens Actuators B Chem. 2022 Mar 12;361:131687. doi: 10.1016/j.snb.2022.131687

Fig. 1.

Fig. 1.

Fabrication of transparent and superhydrophobic microfluidic chips. (a) Schematics of the superhydrophobic coating layer containing silica-based oligomer and silica particles with strong anchoring on plastic substrate, and the chemical structure of TEOS that serves as a silica-based oligomer precursor. (b) SEM images of the superhydrophobic coating films with dual-sized silica particles (400/70 nm). (c) Optical image shows the methylene blue-dyed water droplets deposited on a transparent and superhydrophobic PMMA substrate, and its optical transmittance graph at the visible wavelength range (400–700 nm). Transmittance percentage is determined relative to pristine PMMA substrates.