On the Purity of Atmospheric Glow-Discharge Plasma

Anand, Venu; Gowravaram, Mohan Rao

doi:10.1109/tps.2009.2025949

Cited by 8 publications

(6 citation statements)

References 9 publications

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“…Various state of emission spectra from excited species -argon atoms (696, 706, 727, 738, 750, 763, 772, 795, 801, and 811 nm), 16,18,19 nitrogen atoms (337, 357, 373, 378, and 380 nm) 16,17,19 and oxygen atoms (777 nm) 19 were observed and the spectra were depicted in Figure 2. Excited OH molecular emissions around 308 nm 18 were also observed.…”

Section: Resultsmentioning

confidence: 99%

“…6,7,9,15,16,[24][25][26][27] Those are grafting of hydroxyl group, carboxyl group and amine groups. The modified surface showed increased hydrophilicity, enhanced wettability to the culture medium, promoted cellular responses such as attachment and proliferation.…”

Section: Resultsmentioning

confidence: 99%

“…According to optical emission study of dielectric barrier discharge (DBD) type atmospheric pressure plasma, the intensity of nitrogen emission depended on argon flow rate owing to ambient atmosphere. 16 Thus, it was expected that excited nitrogen species could be generated in DBD with low flow argon flow rate and they might take part in the polymer surface modification. In this study, we tried to adopt simple atmospheric pressure plasma surface modification in order to graft nitrogen derivatives and probed neonatal human fibroblast growth on the treated PCL surfaces.…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen grafting onto polycarprolactone by a simple surface modification with atmospheric pressure glow discharge (Ar-APGD) and promoted neonatal human fibroblast growth

et al. 2011

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Plasma surface modifications of polymer scaffolds using biomolecules such as oxygen, nitrogen, and other active grafting molecules have been studied to enhance biological responses such as cell attachment, spreading, and proliferation. According to the reports, nitrogen grafting requires corrosive or mixture gas environment, or post treatment. This study aimed to evaluate a simple atmospheric pressure plasma surface modification in order to graft nitrogen derivatives and to promote biological responses. In this study, a polycarprolactone (PCL) film was modified within 10 min by argon atmospheric pressure discharge (Ar-APGD). Excited argon atoms, nitrogen atoms, oxygen atoms, and hydroxyl functional groups were observed from the optical emission spectra of the discharge. Decreased carbonyl functional groups and ether functional groups were observed; notably, immobilized nitrogen was observed on the PCL surface after the Ar-APGD treatment. Promoted neonatal Human Dermal Fibroblast (nHDF) growth patterns were observed on the Ar-APGD-treated surface.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nitrogen grafting onto polycarprolactone by a simple surface modification with atmospheric pressure glow discharge (Ar-APGD) and promoted neonatal human fibroblast growth

et al. 2011

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“…Excited oxygen species and hydroxyl groups were generally generated in the discharge space for atmospheric pressure discharge because oxygen, water vapors and other traces were mixed with supplied special gases. 11 They were engrafted onto the surface and inserted into the organic bondings. The consideration about the excitation energy levels helped to choose plasma processing gas.…”

Section: Resultsmentioning

confidence: 99%

Pre-wetting process with helium atmospheric pressure glow discharge for three-dimensional porous scaffold

et al. 2011

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Recently, three-dimensional polymer scaffolds were developed for tissue regeneration. Conventional prewetting processes require a lengthy processing time and have residue problems. In this study, a helium atmospheric pressure glow discharge (He-APGD) was employed as a pre-wetting process for porous poly-(L-lactide-co-ε-caprolactone) (PLCL) scaffold. The three minutes treated PLCL scaffold absorbed the culture media and contained grafted hydroxyl, carbonyl, and carboxyl groups. Moreover, it did not show cytotoxicity, did not require residual rinsing steps and showed a homogeneous cell distribution. The He-APGD treatment has a short processing time and promotes a homogenous cell distribution. Therefore, this pre-wetting process is expected to find many applications in the future.

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“…Figure 2.4 [original data shown in Vinogradova et al (2006)] gives the frame camera pictures from pure neon PF discharge. The purity of air can be found from the emission spectrum of a working gas discharge in air plasma (Anand and Gowravaram (2009)).…”

Section: Physical Chemistry Of Plasmamentioning

confidence: 99%

Towards Real-Time Oxygen Sensing: From Nanomaterials to Plasma

Vinitha

Chinmaya

CV³

et al. 2022

Front. Sens.

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A significantly large scope is available for the scientific and engineering developments of high-throughput ultra-high sensitive oxygen sensors. We give a perspective of oxygen sensing for two physical states of matters—solid-state nanomaterials and plasma. From single-molecule experiments to material selection, we reviewed various aspects of sensing, such as capacitance, photophysics, electron mobility, response time, and a yearly progress. Towards miniaturization, we have highlighted the benefit of lab-on-chip-based devices and showed exemplary measurements of fast real-time oxygen sensing. From the physical–chemistry perspective, plasma holds a strong potential in the application of oxygen sensing. We investigated the current state-of-the-art of electron density, temperature, and design issues of plasma systems. We also show numerical aspects of a low-cost approach towards developing plasma-based oxygen sensor from household candle flame. In this perspective, we give an opinion about a diverse range of scientific insight together, identify the short comings, and open the path for new physical–chemistry device developments of oxygen sensor along with providing a guideline for innovators in oxygen sensing.

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On the Purity of Atmospheric Glow-Discharge Plasma

Cited by 8 publications

References 9 publications

Nitrogen grafting onto polycarprolactone by a simple surface modification with atmospheric pressure glow discharge (Ar-APGD) and promoted neonatal human fibroblast growth

Nitrogen grafting onto polycarprolactone by a simple surface modification with atmospheric pressure glow discharge (Ar-APGD) and promoted neonatal human fibroblast growth

Pre-wetting process with helium atmospheric pressure glow discharge for three-dimensional porous scaffold

Towards Real-Time Oxygen Sensing: From Nanomaterials to Plasma

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