Generation and characterization of field-emitting surface dielectric barrier discharges in liquids

Tomohisa Kawamura, Moriyuki Kanno, Sven Stauss, Koichi Kuribara, David Z. Pai, Tsuyohito Ito, Kazuo Terashima

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Field-emitting surface dielectric barrier discharges (FESDBDs), previously generated in CO2 from high pressures up to supercritical conditions using 10 kHz ac excitation, were investigated in non-aqueous liquid CO2 and liquid silicone oil. In both liquids, the maximum amount of negative charge Q-deposited as a function of the applied voltage amplitude was consistent with the Fowler-Nordheim equation, which demonstrated the presence of field emission. Furthermore, purely continuum optical emission spectra attributable to electron-neutral bremsstrahlung were confirmed. The fact that these characteristics were identical to those in high-pressure CO2 reported from previous research shows that FESDBDs can be generated independently of the medium type and that they are low-power (on the order of 10 mW) discharges. To investigate the charging function of FESDBDs, the motion of fine particles suspended above the FESDBDs was studied by high-speed imaging. It revealed that the speed of fine particles affected by the FESDBDs depends on the particle size, the FESDBDs' function being to charge fine particles.

Original languageEnglish
Article number043301
JournalJournal of Applied Physics
Issue number4
Publication statusPublished - 2018 Jan 28


Dive into the research topics of 'Generation and characterization of field-emitting surface dielectric barrier discharges in liquids'. Together they form a unique fingerprint.

Cite this