Investigation of a Commercial Atmospheric Pressure Plasma Jet by a Newly Designed Calorimetric Probe

Kewitz, Thorben; Fröhlich, Maik; Frieling, J.; Kersten, Holger

doi:10.1109/tps.2015.2420679

Cited by 20 publications

(26 citation statements)

References 15 publications

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“…After reaching a minimum at 5 mm distance, the contact angle increases again. This trend was expected and follows the energy influx measurements performed by Kewitz et al using the same device. A correlation between the energy influx and surface activation could be seen.…”

Section: Resultsmentioning

confidence: 99%

“…The templates are mounted on a microscope slide that is held upside down above the plasma by reduced pressure. For the aerographite templates, an APPJ (Plasmatreat) consisting of a FG5001 generator, a HTR12 transformer, and a RD1004 nozzle was chosen (Figure ) . At the nozzle, a precursor inlet was mounted for introducing hexamethyldisiloxane (HMDSO) into the effluent jet.…”

Section: Methodsmentioning

confidence: 99%

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Surface modification of highly porous 3D networks via atmospheric plasma treatment

Smazna

Shree

Hoppe

et al. 2018

Contributions to Plasma Physics

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Tetrapodal ZnO (T‐ZnO) and aerographite networks represent two highly open porous (94.6 and 99.96%, respectively) model materials on which the impact of an atmospheric‐pressure plasma was studied for the first time. The air plasma treatment by a surface barrier discharge caused remarkable surface modifications on the T‐ZnO template, leading to a large number of oxygen vacancies. These observations were made using scanning electron microscopy (SEM) and Raman spectroscopy. In the second proposed set‐up, pellets of aerographite material were processed to a plasma jet with pressurized air and nitrogen. Hexamethyldisiloxane (HMDSO) was introduced as a precursor into the effluent jet for nanoparticle deposition. Opposing trends in atomic concentrations versus distance to the plasma source were observed when the gas (nitrogen or pressurized air) was changed. More pronounced nanoparticle coverage occurred in the pressurized air plasma. Their distribution was studied using SEM, energy‐dispersive X‐ray (EDX), and Raman spectroscopy. Because of the higher oxidation in the pressurized air plasma treatment, the deposited nanostructures appeared to be a mixture of Si and SiOx nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Surface modification of highly porous 3D networks via atmospheric plasma treatment

Smazna

Shree

Hoppe

et al. 2018

Contributions to Plasma Physics

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“…An additional uncertainty of about 10% is induced by the calibration of the probe. Using the Gaussian profile of the jet obtained at the same parameters with air (standard deviations of 3.35 ± 0.06 mm and 3.47 ± 0.06 mm in x-and ydirections [8]) and regarding the probe diameter of 5 mm, this results in a total energy flux from the jet of 1.61 ± 0.16 kW. This value is comprehensible considering the primary power of 2.3 kW used for this experiment, since a lower value was expected due to different losses in the plasma jet system and only a fraction of the total energy is transferred to the surface.…”

Section: Modified Analytical Methods At High Energy Fluxes and Experimmentioning

confidence: 99%

“…It was already shown that for the investigation of atmospheric pressure plasma jets with a large power consumption changes in the design of the probe are necessary [8]. These adaptions allow to handle the high mechanical and thermal stress of the probe induced by the investigated high power atmospheric pressure plasma jet from the company Plasmatreat.…”

Section: Introductionmentioning

confidence: 99%

Analysis of passive calorimetric probe measurements at high energy influxes

2017

Self Cite

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High energy influxes increase the complexity of passive calorimetric probe measurements because of an increasing temperature of the surrounding materials like the probe holder. This leads to a distinctively different evolution of the probe temperature compared to low energy influxes. Different established methods for the analysis of passive calorimetric probe data are presented and it is shown that they are not applicable for high energy influx measurements resulting in the requirement of a novel analysis approach. Such an approach is given in this paper by the combination of the exponential and the linear method. The high energy influx measurements are studied for a commercial atmospheric pressure plasma jet, in order to illustrate our suggested modified approach.

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“…optical emission spectroscopy) za detekciju kemijski aktivnih vrsta, deaktivacija biofilmova na Ti diskovima promatrana je fluorescencijskom mikroskopijom kao i pretražnim elektronskim mikroskopiranjem (SEM, engl. scanning electron microscopy), termalne sonde koriste se za mjerenje temperature plazme i određivanje prenesene toplinske energije, a spektrometrijom izotopnih omjera promatraju se izotopne promjene u plazmom tretiranim tekućinama [11][12][13][14][15][16][17] . Nastojanja da se konstruira što bolji instrument za CAP generiranje rezultirala su mnogobrojnom aparaturom različite konfiguracije i posljedično, mnogobrojnim geometrijama plazme: plazmena igla (engl.…”

Section: Plazma U Fiziciunclassified

Plasma applications in medicine and dentistry

Mance

2017

Med. flum.

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Sažetak. U fizici, plazma je ioniziran, kvazineutralan plin za koji se često kaže da je četvrto stanje materije. Dugo vremena se plazma u medicini koristila zbog svojih termalnih svojstava, primjerice za sterilizaciju kirurškog i medicinskog pribora te za rezanje i kauterizaciju tkiva. Generiranjem hladne plazme u atmosferskim uvjetima započelo je novo razdoblje u primjeni plazme u biomedicini. Plazma medicina novo je interdisciplinarno znanstveno područje koje kombinira spoznaje fizike plazme s biomedicinskim i kliničkim znanostima. Hladna atmosferska plazma emitira elektromagnetno zračenje te se sastoji od mnoštva nabijenih i nenabijenih čestica, među kojima su najznačajnije reaktivne kisikove i dušikove vrste. Smatra se da su upravo reaktivne kisikove vrste najvažnije za biološke učinke plazme kao što su inaktivacija mikroorganizama i biofilmova. U dermatologiji se pokazalo da hladna atmosferska plazma pozitivno utječe na zacjeljivanje kroničnih rana. Prvi instrumenti za primjenu hladne plazme na ljudima već su i komercijalno dostupni. Primjena hladne plazme ima velik potencijal za primjenu u onkologiji, ali i u stomatologiji. Mnogobrojne studije dale su vrlo obećavajuće rezultate za primjenu hladne plazme u medicini, no treba imati na umu da mehanizmi međudjelovanja plazme s biološkim tkivom još uvijek nisu u potpunosti razjašnjeni, da nema dogovorom prihvaćene definicije doze koju plazma predaje materiji, da još uvijek nema standardiziranih instrumenata za generiranje i karakterizaciju plazme te da za pravu procjenu potencijala primjene atmosferske plazme u medicini i stomatologiji nedostaje više detaljnih in vivo studija.Ključne riječi: dermatologija; onkologija; plazma; stomatologija Abstract. Physical plasma is an ionized, quasi-neutral gas. It is often said to be the fourth state of matter. For a long time, plasma was used in medicine exclusively because of its thermal properties for sterilization purposes of surgical equipment and medical supplies, and also to cut and cauterize tissue. The possibility to generate cold plasma in atmospheric conditions marked the beginning of a completely new era in the application of plasma in biomedicine. Plasma medicine is a new interdisciplinary field of science that combines the knowledge of plasma physics to biomedical and clinical sciences. Cold atmospheric plasma emits electromagnetic radiation and it consists out of charged and uncharged particles, among those reactive oxygen and nitrogen species are the most important ones. It is considered that reactive oxygen species cause the most important biological plasma effects, such as inactivation of microorganisms and biofilms. It has been shown in dermatology that cold atmospheric plasma has a healing effect on chronic wounds. First instruments for the application of cold plasma in humans are already commercially available. Cold plasma has a great potential for application in oncology and in dentistry. Numerous studies have yielded very promising results for the application of cold plasma in medicine, but it should ...

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Investigation of a Commercial Atmospheric Pressure Plasma Jet by a Newly Designed Calorimetric Probe

Cited by 20 publications

References 15 publications

Surface modification of highly porous 3D networks via atmospheric plasma treatment

Surface modification of highly porous 3D networks via atmospheric plasma treatment

Analysis of passive calorimetric probe measurements at high energy influxes

Plasma applications in medicine and dentistry

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