A single electrode room-temperature plasma jet device for biomedical applications

Lü, Xing; Jiang, Zhonghe; Xiong, Qing; Tang, ZhiYuan; Pan, Yuan

doi:10.1063/1.2912524

Cited by 279 publications

(149 citation statements)

References 16 publications

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“…Non-equilibrium atmospheric pressure plasmas [1][2][3][4] have attracted considerable attention because they require low capital cost, can be easily implemented in a continuous production line and also due to their ability to generate highly reactive chemical species at ambient gas temperature [5]. Plasma jets, or plasma plumes are a kind of atmospheric pressure gas discharges where the plasma (usually obtained from a noble gas) is extended beyond the plasma generation region into the surrounding ambience [4,6,7].…”

Section: Introductionmentioning

confidence: 99%

Surface modification of polymeric materials by cold atmospheric plasma jet

Kostov

Nishime

Castro

et al. 2014

Applied Surface Science

218

144

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In this work we report the surface modification of different engineering polymers, such as, polyethylene terephthalate (PET), polyethylene (PE) and polypropylene (PP) by an atmospheric pressure plasma jet (APPJ). It was operated with Ar gas using 10 kV, 37 kHz, sine wave as an excitation source. The aim of this study is to determine the optimal treatment conditions and also to compare the polymer surface modification induced by plasma jet with the one obtained by another atmospheric pressure plasma sourcethe dielectric barrier discharge (DBD). The samples were exposed to the plasma jet effluent using a scanning procedure, which allowed achieving a uniform surface modification. The wettability assessments of all polymers reveal that the treatment leads to reduction of more than 40• in the water contact angle (WCA). Changes in surface composition and chemical bonding were analyzed by x-ray photoelectron spectroscopy (XPS) and Fourier-Transformed Infrared spectroscopy (FTIR) that both detected incorporation of oxygen-related functional groups. Surface morphology of polymer samples was investigated by Atomic Force Microscopy (AFM) and an increase of polymer roughness after the APPJ treatment was found.The plasma-treated polymers exhibited hydrophobic recovery expressed in reduction of the O-content of the surface upon rinsing with water. This process was caused by the dissolution of low molecular weight oxidized materials (LMWOMs) formed on the surface as a result of the plasma exposure.

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Section: Introductionmentioning

confidence: 99%

Surface modification of polymeric materials by cold atmospheric plasma jet

Kostov

Nishime

Castro

et al. 2014

Applied Surface Science

218

144

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“…This may be addressed by using pulse-modulated RF excitation [33] [34]. At lower frequencies below 100kHz, sub-microsecond pulsed excitation is found to effectively reduce gas temperature [13] [19][35]- [38]. In principle, it is possible to use nanosecond pulses and produce room-temperature atmospheric air plasma even at the core of the discharge [37].…”

Section: Introductionmentioning

confidence: 99%

Three distinct modes in a cold atmospheric pressure plasma jet

Walsh

Iza

Janson

et al. 2010

J. Phys. D: Appl. Phys.

324

205

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Cold atmospheric pressure helium plasma jets are increasingly used in many processing applications, due to a distinct combination of their inherent plasma stability with excellent reaction chemistry often enhanced downstream. Despite their widespread usage, it remains largely unknown whether cold atmospheric plasma jets maintain similar characteristics from breakdown to arcing or whether they possess different operating modes. In addition to their known ability to produce a fast moving train of discrete luminous clusters along the jet length, commonly known as plasma bullets, this paper reports evidence of two additional modes of operation, namely a chaotic mode and a continuous mode in an atmospheric helium plasma jet. Through detailed electrical and optical characterisation, it is shown that immediately following breakdown the plasma jet operates in a deterministic chaotic mode. With increasing input power, the discharge becomes periodic and the jet plasma is found to produce at least one strong plasma bullet every cycle of the applied voltage. Further increase in input power eventually leads to the continuous mode in which excited species are seen to remain within the inter-electrode space throughout the entire cycle of the applied voltage.Transition from the chaotic, through the bullet, to the continuous modes is abrupt and distinct, with each mode having a unique set of operating characteristics. For the bullet mode, direct evidence is presented to demonstrate that the evolution of the plasma jet involves a repeated sequence of generation, collapse and regeneration of the plasma head occurring at locations progressively towards the instantaneous cathode. These offer previously unavailable insight into plasma jet formation mechanisms and the potential of matching plasma jet modes to specific needs of a given processing application.

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“…There is a growing interest in a view of considerable environmental, bio-medical, and material processing demands. [1][2][3] In the listed applications, radicals play a significant role and the plasma jet is often operated in the humid atmosphere. Therefore, the hydroxyl radical (OH), one of the strongest oxidative species generated in the water containing plasma, is assumed to be a key reactive agent in the plasma jets application.…”

Section: Introductionmentioning

confidence: 99%

OH radicals distribution in an Ar-H2O atmospheric plasma jet

Nikiforov

Xiong

et al. 2013

Physics of Plasmas

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Recently, plasma jet systems found numerous applications in the field of biomedicine and treatment of temperature-sensitive materials. OH radicals are one of the main active species produced by these plasmas. Present study deals with the investigation of RF atmospheric pressure plasma jet in terms of OH radicals production by admixture of H 2 O into argon used as a feed gas. Generation of OH radicals is studied by laser-induced fluorescence spectroscopy. The excitation dynamics of OH radicals induced by the laser photons is studied by time-resolved spectroscopy. It is shown that vibrational and rotational energy transfer processes, which are sensitive to the surrounding species, can lead to the complication in the OH radicals diagnostics at high pressure and have to be considered during experiments. The axial and radial 2D maps of absolute densities of hydroxyl radicals at different water contents are obtained. The highest density of 1.15 Â 10 20 m À3 is measured in the plasma core for the case of 0.3% H 2 O. In the x-y-plane, the OH density steeply decreases within a range of 62 mm from its maximum value down to 10 18 m À3 . The effect of H 2 O addition on the generation of OH radicals is investigated and discussed. V C 2013 AIP Publishing LLC. [http://dx

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A single electrode room-temperature plasma jet device for biomedical applications

Cited by 279 publications

References 16 publications

Surface modification of polymeric materials by cold atmospheric plasma jet

Surface modification of polymeric materials by cold atmospheric plasma jet

Three distinct modes in a cold atmospheric pressure plasma jet

OH radicals distribution in an Ar-H2O atmospheric plasma jet

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