A liquid composition contains an inorganic oxide and an organic solvent represented by the following Chemical Formula 1,

##STR00001## where R.sub.1 and R.sub.2 each, independently represent straight chain alkyl groups or straight chain alkoxy groups, wherein the organic solvent has a topological index chai4v of 0.9 or greater.

A printing device includes an ink, an ink heating unit, and an ink discharging unit. The ink includes water, a metal pigment, and a resin. A mass ratio of the resin to the metal pigment is 0.1 or greater but 2 or less. A proportion of the water in the ink is 1% by mass or greater but 30% by mass or less. The ink heating unit is configured to heat the ink. The ink discharging unit is configured to discharge the ink heated.

A printing device includes an ink, an ink heating unit, and an ink discharging unit. The ink includes water, a metal pigment, and a resin. A mass ratio of the resin to the metal pigment is 0.1 or greater but 2 or less. A proportion of the water in the ink is 1% by mass or greater but 30% by mass or less. The ink heating unit is configured to heat the ink. The ink discharging unit is configured to discharge the ink heated.

Provided herein are metal conductive compositions with improved conductivity. The improved conductivity is attributable to the addition of a sintering agent and a polymer emulsion.

Provided herein are metal conductive compositions with improved conductivity. The improved conductivity is attributable to the addition of a sintering agent and a polymer emulsion.

The use of copper materials as a replacement for the more expensive coinage metals (i.e., silver, gold) in printed circuits has come to the forefront. For printing, the use of nanomaterials has allowed for significant advances through the use of nanoinks. Unfortunately, as the nanoregime is entered, the increased surface area leads to increased reactivity with atmospheric oxygen which results in a reduction in the conductivity of the printed circuits. To overcome this issue, a synthesis method uses a room temperature reduction of a copper organometallic precursor by the simple addition of catechol-based surfactants to prevent oxidation and agglomeration of the final copper nanoparticles. The selection of these catechol-based surfactants is based on non-aqueous solubility, high surface affinity, and anti-oxidative potential as surface ligands.

The use of copper materials as a replacement for the more expensive coinage metals (i.e., silver, gold) in printed circuits has come to the forefront. For printing, the use of nanomaterials has allowed for significant advances through the use of nanoinks. Unfortunately, as the nanoregime is entered, the increased surface area leads to increased reactivity with atmospheric oxygen which results in a reduction in the conductivity of the printed circuits. To overcome this issue, a synthesis method uses a room temperature reduction of a copper organometallic precursor by the simple addition of catechol-based surfactants to prevent oxidation and agglomeration of the final copper nanoparticles. The selection of these catechol-based surfactants is based on non-aqueous solubility, high surface affinity, and anti-oxidative potential as surface ligands.

The development of stretchable, mechanically and electrically robust interconnects by printing an elastic, silver-based composite ink onto stretchable fabric. Such interconnects can have conductivity of 3000-4000 S/cm and are durable under cyclic stretching. In serpentine shape, the fabric-based conductor is enhanced in electrical durability. Resistance increases only ˜5 times when cyclically stretched over a thousand times from zero to 30% strain at a rate of 4% strain per second due to the ink permeating the textile structure. The textile fibers are wetted with composite ink to form a conductive, stretchable cladding of the silver particles. The e-textile can realize a fully printed, double-sided electronic system of sensor-textile-interconnect integration. The double-sided e-textile can be used for a surface electromyography (sEMG) system to monitor muscles activities, an electroencephalography (EEG) system to record brain waves, and the like.

The present disclosure relates to a piezoresistive ink composition for sensors production. This ink, change linearly their electrical resistivity with an applied deformation and can easily recover when the external applied stress is released. The composition comprises flexible polymers as thermoplastic elastomers from the styrene-butadiene-styrene family (SBS, SEBS or others), nanostructures of carbon or metal, polar solvents and dispersive agents. With this ink, the user can print the sensor with any desired geometry and use different printing techniques, including drop casting, spray, screen and inkjet printing.

The present disclosure relates to a piezoresistive ink composition for sensors production. This ink, change linearly their electrical resistivity with an applied deformation and can easily recover when the external applied stress is released. The composition comprises flexible polymers as thermoplastic elastomers from the styrene-butadiene-styrene family (SBS, SEBS or others), nanostructures of carbon or metal, polar solvents and dispersive agents. With this ink, the user can print the sensor with any desired geometry and use different printing techniques, including drop casting, spray, screen and inkjet printing.