The Typical oscillating circuits and corresponding oscillating wave.

<p>(A) LCR damped oscillation. (B) RC damped oscillation. (A) LC damped oscillation.</p

Optical image and SEM graphs of conductive line written on typing paper by using GaIn10-based liquid metal ink.

<p>(<b>A</b>) Optical image of conductive line written on typing paper by using GaIn₁₀-based liquid metal ink. (<b>B</b>) SEM graph of thickness of conductive line and paper and (<b>C</b>) SEM graph of surface topography of conductive line written on paper.</p

SEM graphs of section and surface topography of conductive line.

<p>(A) SEM graphs of section and (B) surface topography of conductive line written on paper by using GaIn₁₀-based liquid metal ink. The thickness fluctuation range of conductive line is from 30 um to 50 um and the thickness of insulating varnish is about 100 um.</p

The direct writing process of electrical components on paper by using GaIn₁₀-based liquid metal ink.

<p>(A) The detailed dimensions of both in-plane and conventional sandwich patterns of the designed capacitors. (B) The preparation process of both in-plane and conventional sandwich patterns of electrical capacitors are taken for an example. (C) Exploded view schematic illustration of an array of concentric circular patterns of electrical capacitors written in the same plane.</p

Electrical resistivity of GaIn₁₀-based liquid metal ink.

<p>(<b>A</b>) Electrical resistivity of GaIn₁₀-based liquid metal ink as a function of oxygen content contained in 40g GaIn₁₀-based liquid metal ink at room temperature. (<b>B</b>) Electrical resistivity of GaIn₁₀-based liquid metal ink as a function of measuring temperature.</p

The printed circuits prepared by directly writing on different substrate materials with either soft or rigid properties which are expected to be used in future electronics.

<p>(A) – (B) Glass reinforced plastics (GRP). (C) The inductors directly written on paper. (D) Polyimide.</p

Optical images of GaIn₁₀-based liquid metal ink directly written on papers using brush pen.

<p>(<b>A</b>) Optical image of conductive text written on typing paper by using GaIn₁₀-based liquid metal ink. (<b>B</b>) and (<b>C</b>) Optical images of conductive lines in bent states written on typing paper by using GaIn10-based liquid metal ink. (<b>D</b>) and (<b>E</b>) Optical images of conductive lines covered with a polyvinyl chloride film.</p

A sketch map of metal ink printer.

<p>It can easily and directly print desired electrical lines and patterns on different substrate materials using GaIn₁₀-based liquid metal ink.</p

Demonstrated wettability of GaIn10-based liquid metal ink written on different substrate materials.

<p>(<b>A</b>) Epoxy resin board; (<b>B</b>) Glass; (<b>C</b>) Plastic; (<b>D</b>) Silica gel plate; (<b>E</b>) Typing paper; (<b>F</b>) Cotton paper; (<b>G</b>) Cotton cloth; (<b>H</b>) Glass fiber cloth.</p

Essential physical properties of three basic electronic components.

<p>Essential physical properties of three basic electronic components.</p