Abstract: With this invention, in a nanoparticle production method, wherein nanoparticles are produced by irradiating a laser light irradiation portion 2a of a to-be-treated liquid 8 with a laser light, in which suspended particles are suspended, to pulverize the suspended particles in laser light irradiation portion 2a, laser light irradiation portion 2a of to-be-treated liquid 8 is cooled. In this case, by the cooling of to-be-treated liquid 8, the respective suspended particles are cooled in their entireties. When the portion 2a of this to-be-treated liquid 8 is irradiated with the laser light, the laser light is absorbed at the surfaces of the suspended particles at portion 2a. Since to-be-treated liquid 8 is cooled during this process, significant temperature differences arise between the interiors and surfaces of the suspended particles and between the surfaces of the suspended particles and the to-be-treated liquid at laser light irradiation portion 2a, and highly efficient nanoparticulation is realized.

Abstract: The invention provides an ink jet printing method for printing a color image on a printing object by using a plurality of inks, wherein ink nozzles 9a through 9d which house the plurality of inks, respectively, and a dilution nozzle 8 which houses a dilute solution that can dilute the inks are used, the ink is discharged from the ink nozzle 9a by an electrostatic sucking force to form a droplet L on a printing object 4, and then the ink is discharged from the ink nozzle 9b by an electrostatic sucking force and the inks are mixed within the droplet L to form a droplet in an arbitrary additive color. In this case, primary color inks can be accurately mixed within the droplet L.

Abstract: A liquid-contained substance analysis device according to this invention comprises: a substrate 14, which is coated on the surface with PVA and which is mirror finished; a first light source 18 for illuminating light onto substrate 14; and light detector 30, which detects the scattered light due to a liquid or a trace of a liquid that exists on substrate 14, and the position of liquid L or trace of liquid L is detected based on the scattered light detected by light detector 30. By then illuminating excitation light from a second light source 20 onto the detected position, the substances contained in liquid L are analyzed.

Abstract: A minute droplet forming apparatus comprises a nozzle 1 for storing therewithin a liquid 2 for forming a droplet 3; a substrate 5, disposed so as to face the tip of the nozzle 1, for mounting the droplet 3 dropped from the tip of the nozzle 1; and a pulse power supply 10 for applying a pulse voltage between an electrode 12 arranged in the liquid 2 within the nozzle 1 and the substrate 5. After a liquid column 2a is formed by projecting the liquid from the nozzle tip by applying the pulse voltage between substrate 5 and the electrode 12, a nickel piece 7 disposed within the nozzle 1 is moved to the tip part of the nozzle 1 by an XYZ stage 9 by way of a magnet 8, so as to enhance the fluid resistance in the nozzle tip part, thereby causing a setback force for returning the liquid 2 into the nozzle 1, by which the droplet 3 is isolated from the liquid column 2a.

Abstract: A droplet formation method of a mixed liquid is a method that the droplets 71, 72 and 73 are each delivered from each capillary tip to form the droplet 74 of the mixed liquid consisting of a raw material liquid on a substrate by applying a pulse voltage between the raw material liquids stored for each of a plurality of capillaries 1, 2 and 3 and the substrate disposed opposite to each capillary tip. In addition, a droplet formation device of the mixed liquid is provided with a plurality of capillaries for realizing formation of the droplet 74 of the aforementioned mixed liquid, a substrate, a voltage applying device for applying a pulse voltage and a controller for controlling the voltage applying device.

Abstract: A liquid-contained substance analysis device according to this invention comprises: a substrate 14, which is coated on the surface with PVA and which is mirror finished; a first light source 18 for illuminating light onto substrate 14; and light detector 30, which detects the scattered light due to a liquid or a trace of a liquid that exists on substrate 14, and the position of liquid L or trace of liquid L is detected based on the scattered light detected by light detector 30. By then illuminating excitation light from a second light source 20 onto the detected position, the substances contained in liquid L are analyzed.

Abstract: A minute droplet forming apparatus comprises a nozzle 1 for storing therewithin a liquid 2 for forming a droplet 3; a substrate 5, disposed so as to face the tip of the nozzle 1, for mounting the droplet 3 dropped from the tip of the nozzle 1; and a pulse power supply 10 for applying a pulse voltage between an electrode 12 arranged in the liquid 2 within the nozzle 1 and the substrate 5. After a liquid column 2a is formed by projecting the liquid from the nozzle tip by applying the pulse voltage between substrate 5 and the electrode 12, a nickel piece 7 disposed within the nozzle 1 is moved to the tip part of the nozzle 1 by an XYZ stage 9 by way of a magnet 8, so as to enhance the fluid resistance in the nozzle tip part, thereby causing a setback force for returning the liquid 2 into the nozzle 1, by which the droplet 3 is isolated from the liquid column 2a.

Abstract: The liquid treating method according to the present invention introduces a bubble into liquid phase and applies vibration waves, such as ultrasonic waves, from each sides of the bubble. Collision of the vibration waves with the bubble imparts the compression pressure to the bubble. This effect is used to dissolve a gas forming the bubble into the liquid phase or to improve liquid quality of this liquid phase.