Disclosed is a device including a chamber configured as a tubular body, the chamber being connected to a ground power source; a power supply device disposed outside the chamber and configured to continuously apply voltage having a magnitude set as direct current or alternating current; an emitter configured as a hollow tubular body having a plurality of cusps formed on an outer surface thereof and configured to generate plasma, the emitter being disposed in the chamber, elongated in a direction parallel to a flow direction of the processing target gas, electrically connected to the power supply device, and configured to generate nonthermal plasma; a rod configured to electrically connect the emitter and the power supply device and support the emitter; and an insulator configured to electrically insulate the rod and the chamber and prevent arcing from occurring between the rod and the chamber.

A barrierless device and method for generating streamer discharge is provided including solid/liquid electrodes for free radical generation at high efficiency. A first electrode, including periodically positioned discharge ignition tips is deposed in proximity to a second electrode, creating a discharge gap with no dielectric barrier layer in between. The discharge gap includes an inlet and an outlet. Streamers with proximity constraints emerge from the first electrode and propagate through the discharge gap towards the second electrode by supplying either positive or negative pulse voltage to the first electrode, resulting in interaction of the streamer heads with the discharge gas and generation of radicals. Optionally, the second electrode is a liquid which interacts with the streamer head to generate additional radicals. The device can either be used to cause fast chemical reaction within the discharge gap or the generated radical gas can be removed for utilization outside the discharge gap.

A corona plasma cell includes a polarized electrode and a ground electrode, including a cylinder and a porous film, with the cylinder having a low profile and the polarized electrode not entering the cylinder; a corona plasma dual element including a first cell, a second cell having such a structure, which first and second cell are symmetrically arranged; and finally a plasma reactor including a plurality of cells or dual elements.

A voltage application device includes a voltage application circuit. The voltage application circuit applies application voltage between discharge electrode and counter electrode which face each other with a clearance left from each other to generate a discharge. The voltage application device forms discharge path partially and dielectrically broken between discharge electrode and counter electrode when a discharge is generated. Discharge path includes first dielectric breakdown region formed around discharge electrode, and second dielectric breakdown region formed around counter electrode.

Disclosed herein is a plasma generator capable of stably performing the discharge and an appliance having the same, wherein the plasma generator is configured to generate the discharge by plasma. The plasma generator includes a first case configured to store water to be treated; a second case disposed inside the first case and provided with a body having opposite sides opened, and a cover covering opened one side of the body; a first electrode disposed such that at least thereof is immersed in the water to be treated stored in the first case; and a second electrode disposed inside the second case. The second electrode is apart from a water surface of the water to be treated in an upper side of the water surface of the water to be treated in contact with opened other side of the body opposite to one side of the body.

Voltage application device includes voltage application circuit. Voltage application circuit causes discharge electrode to generate a discharge by applying an application voltage to load that includes discharge electrode holding liquid. Voltage application circuit periodically changes a magnitude of the application voltage to generate a discharge intermittently. Voltage application circuit applies a maintaining voltage to load for suppressing contraction of liquid in addition to the application voltage during an intermittent period from a discharge to a next discharge.

A plasma coating device for treating a wound comprises a plasma chamber having: one or more electrodes, a gas supply inlet, a plasma outlet exposed to ambient pressure, and an ignition system operatively connected to the electrodes for providing a non-thermal equilibrium plasma within the plasma chamber. An aerosol delivery system is operable to introduce a bioresorbable material as an aerosol into the plasma, to produce a coating on the wound surface.

The plasma air purifier is an apparatus that simultaneously produces positive ions and negative ions in order to eliminate bacteria, viruses and odors in the air of the surrounding environment. The apparatus includes a housing, a discharge plate, a discharge needle array, a microcontroller, and a power supply. The housing encloses the discharge needle array, the microcontroller, and the power supply, allowing the apparatus to be easily incorporated into a variety of environments and easily transported. The discharge plate is mounted onto the housing via at least one first pillar and at least one second pillar. The discharge plate produces negative ions, and the discharge needle array produces positive ions. The discharge needle array is electronically connected to the microcontroller. The power supply is electrically connected to the microcontroller and the discharge plate. The discharge needle array is electrically connected to the power supply through the microcontroller.

Disclosed herein are apparatuses and methods for generating non-thermal plasma which can form reactive oxygen species (ROS), such as those used to neutralize bacteria and other pathogens in the air and surrounding area. Also disclosed are apparatuses and methods for neutralizing bacteria and other pathogens using ROS generated through the use of non-thermal plasma. Also disclosed are apparatuses and methods for generating ROS. Also disclosed are apparatuses and methods for treating air and nearby surfaces.

A flow field visualization device includes a chamber, a power supply, at least one pair of electrodes, and at least two high-speed cameras. The power supply outputs a voltage for plasma generation, and the pair of electrodes is disposed in the chamber. The pair of electrodes includes a first electrode and a second electrode. The first electrode has a plurality of first tips, the second electrode has a plurality of second tips, and the first tips and the second tips are aligned with each other. The pair of electrodes generates a periodically densely distributed plasma by exciting a gas in the chamber through the voltage from the power supply. The high-speed cameras are disposed outside the chamber and are positioned in different directions corresponding to the pair of electrodes in order to capture images of different dimensions.