Onfocal microscope also shows the fitted circle which has a radius of 128.4 m. is displayed in FAUC 365 Protocol Figure 3e, which (Nikon A1, gold-coated, Nikon, Tokyo, Japan). The 2D cross-sectional view with the that the 2D microstructures was film microstructure includes a It can be seen within the figure curved film surface profile of theexamined by optical microcircular arc shape using a height of about 60 m. The fabricated film microstructure IL-4 Protein Technical Information arrays might be employed as optical elements. A projection experiment was performed to illustrate the utility of those microstructures as microlens array for optical display application (Figure 4a). The film microstructure array was positioned on the sample stage of an optical microscope, in addition to a printed transparency(a)Micromachines 2021, 12,four ofscope (Nikon SMZ1270, colored film microstructures, Nikon, Tokyo, Japan). The 2D surface profile of a standard curved microstructure was characterized by profiler (VeecoDektak 150, Veeco, Plainview, NY, USA). three. Final results and Discussion Figure 3a,b display the 2D morphology on the fabricated film microstructure array. The 2D profiles seem incredibly uniform, showing a circular shape with a diameter of around 250 , which can be almost equal to the diameter of the holes in the PDMS sheet. The 3D surface topography with the film microstructures is presented in Figure 3c, plus the 2D cross-sectional view in the film microstructures is presented in Figure 3d. Besides excellent uniformity, the smooth connection together with the flat film in the bottom from the microstructures is observed from the figures. The 2D surface profile of a standard curved film microstructure is displayed in Figure 3e, which also shows the fitted circle that has a radius of 128.4 . Micromachines 2021, 12, x FOR PEER Assessment It can be observed in the figure that the 2D surface profile of the film microstructure has a circular arc shape with a height of about 60 .five of(a)(c)1mm(b)(e)250 m(d)Figure Figure three. (a) Optical microscope image of your microstructures (magnification: 50 he order and shape uni3. (a) Optical microscope image on the microstructures (magnification: 50, illustrating ), illustrating the formity with the array structure; (b) Optical microscope image with the microstructures (magnification: 200, displaying the order and shape uniformity of the array structure; (b) Optical microscope image of the microstructures two-dimensional (2D) morphology from the microstructures; (c) three-dimensional (3D) surface profiles of the fabricated film (magnification: 200, displaying the two-dimensional (2D) morphology on the microstructures; film microstructures measured by utilizing a laser scanning confocal microscope; (d) 2D cross-sectional view with the fabricated (c) three-dimensional (3D) surface profiles in the fabricated film microstructures and the fitted circle a microstructures; (e) The 2D surface profile of a typical curved film microstructure (solid line)measured by using (dashed line). laser scanning confocal microscope; (d) 2D cross-sectional view of the fabricated film microstructures;with an alphabet “A” (3 mm 5 mm) on it was placed under the microstructure array. White light from the bottom illuminated the microstructure array by means of the printed transk two Et 2 c the focal plane2of the microstructure = parency. Lastly, an alphabet “A” was projected onto 12 1 – 2rs(e) The 2D surface profile of a common curved film microstructure (solid line) as well as the fitted circle The curved film microstructures were formed by means of confined buckling of circula (d.