Fig. 2: Clean surface of the flexible SC SRO membranes. | npj Flexible Electronics

Fig. 2: Clean surface of the flexible SC SRO membranes.

From: Single-crystalline-level properties of ultrathin SrRuO3 flexible membranes with wide and clean surface

Fig. 2

a Photograph showing the background ‘DGIST’ logo to demonstrate the flexibility of our \({{{\mathrm{SRO}}}}_{{{{\mathrm{PET}}}}}^{15{{{\mathrm{nm}}}}}\) membrane, with the form \({{{\mathrm{SRO}}}}_{{{{\mathrm{substrate}}}}}^{{{{\mathrm{thickness}}}}}\) used for convenience. b Optical microscopy image of 2.5 × 2.5-mm2-wide \({{{\mathrm{SRO}}}}_{{{{\mathrm{PET}}}}}^{15{{{\mathrm{nm}}}}}\) showing a clean surface. An atomic force microscopy image reveals a more uniform phase on the randomly selected 5 × 5 μm2 surface of the c SC SRO membrane than that of the d treated PET. The root-mean-square roughness of the e SC SRO membranes was only ~2.9 nm, comparable to the ~2.4 nm of f PET.

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