Figure 2 | NPG Asia Materials

Figure 2

From: A skin-attachable, stretchable integrated system based on liquid GaInSn for wireless human motion monitoring with multi-site sensing capabilities

Figure 2

(a–c) Contact angle images of the GaInSn droplet on various substrates of (a) PDMS, (b) Au deposited glass substrate and (c) Au deposited PDMS substrate. Each image shows dramatic changes in contact angle before (al, b1 and c1) and after (a2, b2 and c2) reducing its surface with 10 wt% NaOH. (d) Contact angle measurement of oxidized and reduced GaInSn on various substrates. (e) An optical image of Cr/Au film deposited on partially cured PDMS surface. (f) An optical image of the liquid-metal pattern of 50 μm width after encapsulation. Scale bar, 20 μm. PDMS, Polydimethylsiloxane.

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