Figure 4 | Scientific Reports

Figure 4

From: Template-Assisted Preparation of Micrometric Suspended Membrane Lattices of Photoluminescent and Non-Photoluminescent Polymers by Capillarity-Driven Solvent Evaporation: Application to Microtagging

Figure 4

Preparation of Both Regular and Non-Regular (μQR codes) Micrometric Suspended MDMO-PPV and PS Membrane Lattices. (a–c) Top-view SEM (a,c) and 50× optical (b) images of a silicon template featuring 2D arrays of open-ended micropipes featuring pitch of 4 μm before polymer drop-casting (a) and after formation of suspended membrane lattices in MDMO-PPV (b) and PS (c), with higher magnification insets. (d–f) Top-view SEM (d,f) and 20× optical (e) images of a silicon microstructured template consisting of 2D repetitions of square lattices featuring a QR-code-like pattern of 2-μm-sized open-ended micropipes before polymer drop-casting (d) and after the formation of photoluminescent and non-photoluminescent μQRs of suspended MDMO-PPV (e) and PS (f) membranes, respectively, with higher magnification insets.

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