Figure 2 | Scientific Reports

Figure 2

From: Stretchable Ag electrodes with mechanically tunable optical transmittance on wavy-patterned PDMS substrates

Figure 2

(a) Optical transmittance of flat-PDMS and wavy-patterned PDMS substrate. Right side photos exhibit the transparency of the reference flat PDMS and wavy-patterned PDMS substrates. (b) Optical microscope images of the flat PDMS and wavy-patterned PDMS substrate fabricated under different UVO irradiation times and pre-strains from 40 to 80%. (c) Cross-sectional FESEM images of wavy-patterned PDMS with an inset surface FESEM image. “A” and “B” indicates the sharp hollow and broad hollow buckles on the wavy-patterned PDMS substrate, respectively. (d) Enlarged surface FESEM image obtained from the buckle region showing micro-sized and nano-sized buckles.

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