Veni-subsidie van NWO : onderzoek of plasma’s kunnen helpen bij wondgenezing

Zeven jonge wetenschappers van de TU/e krijgen dit jaar een Veni-subsidie van NWO. Dit maakte NWO op dinsdag 2 november bekend. NWO kent dit jaar in totaal 161 'Veni's' toe, van elk een kwart miljoen euro. Drie van deze Veni's zijn bestemd voor de faculteit Scheikundige Technologie

Physical characteristics of discharges in and in-contact-with water

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Diagnostics of plasmas in and in contact with liquids

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Atmospheric pressure discharge filaments and microplasmas:Physics, chemistry and diagnostics

\u3cp\u3eThis review summarizes the state of the art of plasma diagnostics on atmospheric pressure plasmas formed at characteristic length scales of approximately 1 mm or smaller and identifies challenges and prospects. Both plasmas generated in confined geometries, so-called microplasmas, as well as discharge filaments occurring in commonly filamentary plasmas, e.g. microdischarges in dielectric barrier discharges are covered. In spite of the differences between microplasmas which often obtain a quasi steady-state and single microdischarges or filaments which are self-limited in space and time and thus intrinsically transient, both face very similar diagnostic challenges of which two are immediately apparent: the high collisionality which requires adaptations of standard plasmas diagnostics often developed for low-pressure plasmas, and the requirements on high spatial resolution due to the strong gradients in plasma properties. The complexity of the plasma generation and the physical and chemical properties of the above-mentioned plasmas requires the knowledge of an extensive series of different parameters to obtain a full characterization. As the results of the diagnostics are not always unambiguous and require a detailed understanding of plasma physics and chemistry, a summary of the main properties and pecularities of high-pressure plasmas is included in this review.\u3c/p\u3

Microplasmas for the direct synthesis of Hydrogen Peroxide in the gas phase

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Diagnostics of water containing non-thermal atmospheric pressure plasmas

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Mass spectrometry investigation of positive and negative ions generated by a RF capacitively coupled discharge at atmospheric pressure in He-H2O

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Effect of plasma on gas flow and air concentration in the effluent of a pulsed cold atmospheric pressure helium plasma jet

\u3cp\u3eIn this work, we report on the flow effects induced by a nanosecond pulsed helium cold atmospheric pressure plasma jet impinging on a glass substrate. Gas temperature measurements have been performed using optical emission spectroscopy including rotational spectra of OH(A-X) (0,0) and N\u3csub\u3e2\u3c/sub\u3e(C-B) (0,0) and resonance broadening of a helium emission line at 667.8 nm. The measured increase in gas temperature was less than 15 K. We have measured the air concentration distribution in the jet effluent by means of Rayleigh scattering exploiting the large difference in Rayleigh cross-section of air and helium. The obtained results show that the plasma causes a broadening of the helium channel suggesting an enhanced gas velocity and mixing with the ambient air. The impact of the plasma on the jet effluent is polarity dependent and is larger in the case of positive applied voltage pulses. Using an estimation of the increased gas velocity required to obtain the observed air concentrations, we have shown that both gas heating and electrohydrodynamic (EHD) forces related to the propagation of an ionization front are not causing the observed phenomena. The surface charge which can exist for a much longer time than the duration of the applied voltage pulse is the primary cause of the EHD forces on the bulk charges which lead to significant different air concentration profiles in the jet effluent for plasma on and off.\u3c/p\u3

Time resolved gas temperature and electron density measurements by optical emission spectroscopy of nanosecond pulsed discharges in He

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Electrical and optical diagnostics of an RF and a nanosecond pulsed DC cold atmospheric pressure plasma jet for biomedical applications

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