Fig. 1: Fabrication process of electronic gels.
From: Self-healable stretchable printed electronic cryogels for in-vivo plant monitoring
a Schematic of the fabrication steps of the electronic cryogels. First, the electronic trace is inkjet-printed on a glass slide. The first layer of hydrogel is then deposited on top of the conductive trace and is air-dried overnight, the gel is then peeled from the glass slide. Next, the second layer of wet hydrogel is drop-cast on top of the first air-dried layer of gel over the sensing area. Finally, the sample is placed in a freezer at −20 °C overnight. After a few freeze-thaw cycles, the electronic cryogel is ready for use, and placed inside a tomato plant stem. b Digital photographs of stretchable cryogel-based OECTs. c, d Photographs of the electrochromic properties of a PEDOT:PSS conducting layer in a transistor (OECT) configuration. e Photographs of a stretchable cryogel-based capacitor and f Cryogel-based electronic circuit comprising one OECT and two capacitors.
