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. 2020 Feb 15;11(2):200. doi: 10.3390/mi11020200

Figure 3.

Figure 3

Printing and microfluidic technology. (A) Printing circuits with liquid metal ink by a roller ball pen, reproduced with permission from [82]. (B) Mechanical printing of liquid metal circuits with desktop printer, reproduced with permission from [84]. (C) Schematic of patterning liquid metal with a rigid mask, reproduced with permission from [90]. (D) Schematic of patterning liquid metal with toner mask, reproduced with permission from [72]. (E) Schematic of microfluidic technology: (a) The silicon chip; (b) Silicon chip coated by photoresist; (c) Lithography model; (d) Pouring PDMS; (e) PDMS with micro-grooves; (f) Punching; (g) Plasma bonding; (h) Injecting liquid metal. (F) A stretchable pressure sensor fabricated by the microfluidic technology: (a) Vertical view of the pressure sensor; (b) Original state of the pressure sensor; (c) A pressure sensor under bending; Reproduced with permission from [96].