Controlled microdroplet transport in an atmospheric pressure microplasma

A microfabricated atmospheric-pressure microplasma source operating in air

An atmospheric-pressure air microplasma is ignited and sustained in a 25μm wide discharge gap formed between two co-planar gold electrodes. These electrodes are the two ends of a microstrip transmission line that is microfabricated on an Al2O3 substrate in the shape of a split-ring resonator operating with a resonant frequency of 895 MHz. At resonance, the device creates a peak gap voltage of ∼...

Nonequilibrium and effect of gas mixtures in an atmospheric microplasma

Capacitively Coupled Atmospheric RF Microplasma Devices

We designed and fabricated planar, four-terminal, atmospheric, capacitively coupled (CC), helium RF micro plasma devices (MPDs). The operational characteristics of the MPDs are investigated. The microplasma field effect transistors (FETs) are fabricated and investigated, showing that the plasma current can be controlled by a gate bias. The stability of the MPDs is tested under harsh conditions ...

Experimental study of a planar atmospheric-pressure plasma operating in the microplasma regime.

Electrical characterization of a nonthermal radio-frequency atmospheric-pressure microplasma in a parallel plate configuration has shown that reducing electrode gap into the submillimeter range increases current and power density at a reduced voltage as compared to similar plasmas at larger electrode gaps which have no gap dependence. Calculation of sheath thickness and electric fields in the s...

Atmospheric-pressure microplasma in dielectrophoresis-driven bubbles for optical emission spectroscopy.

The manipulation of bubbles and the ignition of microplasma within a 200 nL bubble at atmospheric pressure and in an inert silicone oil environment were achieved. Driven by dielectrophoresis (DEP), bubble generation, transportation, mixing, splitting, and expelling were demonstrated. This process facilitated the preparation of various bubbles with tuneable gas compositions. Different gas bubble...