Provided are a plasma irradiation apparatus and plasma irradiation method capable of converting a silica precursor to a high quality silica film in a short time without thermal effects on the object being processed. This plasma irradiation apparatus 1 is provided with a plasma-generating unit 12 and an irradiation unit 80 for irradiating the plasma generated by the plasma-generating unit 12 on an object to be processed, and is characterized in that irradiation unit 80 comprises a coating part 85 capable of coating a liquid on the object being processed.

In some aspects, electrodes can include a front portion shaped to matingly engage a nozzle of the plasma cutting system, the front portion having a first end comprising a plasma arc emitter disposed therein; and a rear portion thermally connected to a second end of the front portion, the rear portion shaped to slidingly engage with a complementary swirl ring of the plasma cutting system and including: an annular mating feature extending radially from a proximal end of the rear portion of the electrode to define a first annular width to interface with the swirl ring, the annular mating feature comprising a sealing member configured to form a dynamic seal with the swirl ring to inhibit a flow of a gas from a forward side of the annular mating feature to a rearward side of the annular mating feature.

The present application relates to a device for treating skin using non-thermal plasma. It comprises a housing having a skin interface electrode for application to skin during treatment, a generator for generating non-thermal plasma at the skin interface electrode; and an isolating element to isolate a region surrounding said skin interface electrode other than during treatment so that non-thermal plasma generated at the skin interface electrode within said region sterilises the skin interface electrode.

Provided are a plasma irradiation apparatus and plasma irradiation method capable of converting a silica precursor to a high quality silica film in a short time without thermal effects on the object being processed. This plasma irradiation apparatus 1 is provided with a plasma-generating unit 12 and an irradiation unit 80 for irradiating the plasma generated by the plasma-generating unit 12 on an object to be processed, and is characterized in that said irradiation unit 80 comprises a coating part 85 capable of coating a liquid on the object being processed.

In some aspects, electrodes can include a front portion shaped to matingly engage a nozzle of the plasma cutting system, the front portion having a first end comprising a plasma arc emitter disposed therein; and a rear portion thermally connected to a second end of the front portion, the rear portion shaped to slidingly engage with a complementary swirl ring of the plasma cutting system and including: an annular mating feature extending radially from a proximal end of the rear portion of the electrode to define a first annular width to interface with the swirl ring, the annular mating feature comprising a sealing member configured to form a dynamic seal with the swirl ring to inhibit a flow of a gas from a forward side of the annular mating feature to a rearward side of the annular mating feature.

A nanometer-size-particle production apparatus and method are provided which can prevent the occurrence of waste fluids, and which makes quick and continuous syntheses feasible while suppressing damages to the electrode. The nanometer-size-particle production apparatus is for synthesizing nanometer size particles in a liquid by means of plasma in the liquid.

In an embodiment a device includes a first housing in which a piezoelectric transformer is arranged and a second housing in which a control circuit is arranged, the control circuit configured to apply an input voltage to the piezoelectric transformer, wherein the piezoelectric transformer is configured to ionize a process medium, and wherein the device is configured to provide a circulating air operation so that the process medium is guided from the piezoelectric transformer through a catalytic converter and then back to the piezoelectric transformer and generate a non-thermal atmospheric pressure plasma.

A plasma cutting system is provided. The system includes a power source configured to generate a plasma arc, and a plasma arc torch connected to the power source for delivering the plasma arc to a workpiece. The plasma arc torch defines a multi-function fluid flow path for sustaining the plasma arc and cooling the plasma arc torch such that the plasma cutting system has a power-to-gas flow ratio of at least 2 kilowatts per cubic feet per minute (KW/cfm). The power-to-gas flow ratio comprises a ratio of power of the generated plasma arc to a total gas flow supplied to the plasma arc torch.

A method and a device for generating a plasma in atmospheric-pressure, low-temperature conditions are described herein. The device described for the generation of the plasma comprises a first pair of electrodes, each of which separated by a dielectric layer and externally positioned with respect to a tubular duct where the gas flows, and a second pair of electrodes, also in this case each of which separated by a dielectric layer and externally positioned with respect to said tubular duct where the same gas flows downstream with respect to the first pair with respect to the direction of the flow. A high-frequency excitation is applied to the first pair of electrodes while a Radio-Frequency excitation is applied to the second pair of electrodes. The plasma generated in this manner emerges from the gas flow at the outlet of the transport duct. The high-frequency excitation can be applied in pulse trains and the Radio-Frequency generator is substantially activated in said pulse trains for the purpose of limiting the thermal load on the treated substrate. Chemical precursors and reagents can be added to the plasma as vapors or aerosols by means of a central transport duct coaxial with the tubular duct for the gas.

A wearable cold plasma system includes a wearable cold plasma applicator configured to couple to a surface of a user wearing the wearable cold plasma applicator and configured to generate a cold plasma. The wearable cold plasma applicator is in the form of a cuff having one or more electrodes configured to generate the cold plasma within a cavity of the cuff. The wearable cold plasma system also includes a controller coupled to the wearable cold plasma applicator, and the controller is configured to produce an electrical signal that forms the cold plasma with the wearable cold plasma applicator.