A method of preparation of a gold electrode, which includes the steps of: a) inkjet printing on a substrate an ink including gold nanoparticles functionalized with a compound Cap of formula (I) HS-A-Polyalkylene glycol (I), wherein A is a bound or an alkyl chain having 1 to 12 carbon atoms and wherein polyalkylene glycol is polyethylene glycol, polypropylene glycol or a mixture thereof; and b) annealing printed ink, wherein the compound Cap has an average molar mass of less than 500 g/mol, preferably an average molar mass of about 200 g/mol. Also, an electrode obtainable by the method of the invention, a sensor including the electrode and the use of the sensor.

The present application provides a quantum dot ink and a display terminal. Components of the quantum dot ink include a low-molecular-weight silicon polymer which includes three organosilicon group directly connected to a nitrogen atom and each independently containing a silicon-oxygen bond as a skeleton and containing an amide or ester branched chain, such that the interaction of multiple hydrogen bonds in the low-molecular-weight silicon polymer is used to enhance the adhesion of the quantum dot ink after curing into a film, and meanwhile, the film is provided with self-repair properties.

A recording method of the present disclosure includes: an adhesion step of ejecting an ink composition from an ink jet head so as to be adhered to a recording medium; and a primary heating step of heating the ink composition adhered to the recording medium in the adhesion step, and the ink composition is a water-based ink containing an organic compound which is a solid at 25° C. having a standard boiling point of 280° C. or less and which has a solubility of 50 [g/100 g of water] or more in water at 25° C.

Provided is an aqueous ink that has excellent ejection stability and that can be used to record an image with excellent abrasion resistance and an ink cartridge and an ink jet recording method that use the aqueous ink. The aqueous ink is an aqueous ink for ink jet containing a pigment, an organic solvent and a resin particle formed of a polyester resin or a urethane resin. The organic solvent includes a carbonate compound and the like. The ink cartridge includes an ink container configured to contain the aqueous ink and the ink jet recording method records an image on a recording medium by ejecting the aqueous ink from an ink jet recording head.

Provided is an aqueous ink that has excellent ejection stability and that can be used to record an image with excellent abrasion resistance and an ink cartridge and an ink jet recording method that use the aqueous ink. The aqueous ink is an aqueous ink for ink jet containing a pigment, an organic solvent and a resin particle formed of a polyester resin or a urethane resin. The organic solvent includes a carbonate compound and the like. The ink cartridge includes an ink container configured to contain the aqueous ink and the ink jet recording method records an image on a recording medium by ejecting the aqueous ink from an ink jet recording head.

An ink set includes a non-white ink composition and a white ink composition, and the non-white ink composition and the white ink composition are each an aqueous ink jet ink. The non-white ink composition contains a silicone-based surfactant A having a maximum peak within a molecular weight range of 3,000 to 20,000 within a molecular weight range of 300 or more in a molecular weight distribution in gel permeation chromatography, and the white ink composition contains a silicone-based surfactant B having a HLB value of 10.5 or less by Griffin method, but not having a maximum peak within a molecular weight range of 3,000 or more within a molecular weight range of 300 or more in a molecular weight distribution in gel permeation chromatography.

An ink set includes a non-white ink composition and a white ink composition, and the non-white ink composition and the white ink composition are each an aqueous ink jet ink. The non-white ink composition contains a silicone-based surfactant A having a maximum peak within a molecular weight range of 3,000 to 20,000 within a molecular weight range of 300 or more in a molecular weight distribution in gel permeation chromatography, and the white ink composition contains a silicone-based surfactant B having a HLB value of 10.5 or less by Griffin method, but not having a maximum peak within a molecular weight range of 3,000 or more within a molecular weight range of 300 or more in a molecular weight distribution in gel permeation chromatography.

Provided is an ink containing water, a plurality of organic solvents, a color material, and resin particles, wherein the plurality of organic solvents contain at least one compound having a hydrogen bond term δH, which is a Hansen solubility parameter, of 4.1 MPa.sup.1/2 or higher but 9.5 MPa.sup.1/2 or lower and a boiling point of 170° C. or higher and at least one diol compound containing 3 or 4 carbon atoms.

Provided is an ink containing water, a plurality of organic solvents, a color material, and resin particles, wherein the plurality of organic solvents contain at least one compound having a hydrogen bond term δH, which is a Hansen solubility parameter, of 4.1 MPa.sup.1/2 or higher but 9.5 MPa.sup.1/2 or lower and a boiling point of 170° C. or higher and at least one diol compound containing 3 or 4 carbon atoms.

An inkjet ink has a volume reduction rate ΔV calculated using formula (1) “ΔV=100×(V.sub.0−V.sub.22)/V.sub.0” of at least 25% and no greater than 45%. In the formula (1), V.sub.0 represents a first volume of a liquid droplet of the inkjet ink at landing, on a non-absorbent recording medium, of the inkjet ink dropped onto the non-absorbent recording medium. V.sub.22 represents a second volume of the liquid droplet when 22 seconds elapse from the landing of the liquid droplet on the non-absorbent recording medium.