Recent advances in microcavity plasma devices and arrays: a versatile photonic platform

Eden, J. G.; Park, S. J.; Ostrom, N.P.; Chen, K. F.

doi:10.1088/0022-3727/38/11/002

Cited by 65 publications

(44 citation statements)

References 11 publications

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“…the integral optical efficiency [3,5,2]. Experimental investigations of the composing single discharge cavities are challenging, primarily due to the small dimensions and the operating conditions close to atmospheric pressure.…”

Section: Confidential: Not For Distribution Submitted To Iop Publishmentioning

confidence: 99%

Excitation dynamics of micro-structured atmospheric pressure plasma arrays

Boettner¹,

Waskoenig²,

O’Connell³

et al. 2010

J. Phys. D: Appl. Phys.

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Abstract. The spatial dynamics of the optical emission from an array of 50 times 50 individual micro cavity plasma devices are investigated. The array is operated in argon and argon-neon mixtures close to atmospheric pressure with an AC voltage. The optical emission is analysed with phase and space resolution. It has been found that the emission is not continuous over the entire AC period, but occurs once per half period. Each of the observed emission phases shows a self-pulsing of the discharge, with several bursts of emission of fixed width and repetition rate. The number of emission bursts depends on applied voltage and frequency. Spatially resolved measurements prove that the emission bursts are formed by overlapping emission pulses from single discharge cavities. Intensity differences between positive and negative half-wave can be interpreted through spatially resolved measurements of single discharge cavities.

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Section: Confidential: Not For Distribution Submitted To Iop Publishmentioning

confidence: 99%

Excitation dynamics of micro-structured atmospheric pressure plasma arrays

Boettner¹,

Waskoenig²,

O’Connell³

et al. 2010

J. Phys. D: Appl. Phys.

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“…Radio frequency (rf) excited MDs are also being studied for use in lighting and surface modification [10][11][12]. For example, Eden et al [13] demonstrated MD sources operating at 5-20 kHz using rare gas and Ar/N 2 mixtures in large-arrays of up to 40 000 pixels.…”

Section: Introductionmentioning

confidence: 99%

Microdischarges for use as microthrusters: modelling and scaling

Arakoni¹,

Ewing²,

Kushner³

2008

J. Phys. D: Appl. Phys.

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Microsatellites with masses of tens of kilograms require only hundreds of micronewtons of thrust for station keeping and attitude control. Microdischarges (MDs) offer a compact way of generating such thrusts without using complex propulsion systems. In this paper, results from computational investigations of MDs sustained in Ar with tens of Torr back pressure are discussed with emphasis on conversion of discharge power into gas heating which can then be expanded in a nozzle to generate thrust. Typical cylindrical geometries have diameters of a few hundred micrometres and lengths of a few millimetres. We found that the gas temperature can exceed 1000 K for power densities of tens of kilowatts per cubic centimetre at back (upstream) pressures of tens of Torr. The nozzle length and location of the discharge in the MD channel are important from a gas dynamics viewpoint and so influence the incremental thrust (above that of the cold flow). Confining the discharge in the nozzle typically increases the peak gas temperature and the flow velocity, thereby potentially improving the performance of a MD used as a microthruster.

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Section: Diagnostic Applicationsmentioning

confidence: 99%

“…They can be also used for monitoring of various inflammatory skin diseases. Since 'calor' (temperature) forms one of the components of inflammation; detecting changes in the temperature of the skin can be used for monitoring of diseases like atopic dermatitis, psoriasis, mycosis fungoides, etc [118].Gold nanoparticles have been studied for nanodiagnosis. A large number of techniques are available which can help in tracing of gold nanoparticles like fluorescence, optical absorption, electrical conductivity, atomic and magnetic force.…”

mentioning

confidence: 99%

Therapeutic and Diagnostic Applications of Nanotechnology in Dermatology and Cosmetics

Arif¹,

Nisa²,

Amin³

et al. 2015

J Nanomedine Biotherapeutic Discov

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Nanoscience is the branch of science pertaining to the study of minute particles on an atomic or molecular scale, whose size is measured in nanometers. A nanometer represents one billionth of a meter (i.e., 10 -9 m). Nanotechnology is an emerging branch of engineering that involves the use of particles on a nanoscale (1-100 nm). Thus, the application of nanotechnology in the field of dermatology is the Nanodermatology. Nanodermatology represents one of the most emerging fields for which an increasing interest is rising among scientists as well as pharmaceutical companies. Nanotechnology has revolutionized the treatment of several skin diseases. It is effective in targeted delivery of active medicaments and cosmetic ingredients. The skin forms the first point of contact for a diverse number of nanomaterials. Nanomedicine in dermatology has opened a new era in the diagnosis and treatment of various skin disorders. Possible applications of nanotechnology in dermatology and cosmetics include sunscreens, moisturizers, anti-aging formulations, phototherapy, anti-sepsis, vaccines, skin cancers, hair and nail care, etc. In this review after an introduction of nanotechnology, authors have described various types of nanoparticles followed by various possible indications of nanotechnology in dermatology and cosmetics. An account on safety of nanoparticles has also been added to the review. properties. Various other agents including vitamins (Vit. A, E, and K) and certain antioxidants like Carotenoids, lycopene, etc have been introduced in liposomes. These increase the physical and chemical stability of liposomes when dispersed in water [12]. Due to their biocompatible, biodegradable and nontoxic nature, liposomes find uses in a variety of cosmeceuticals as they encapsulate active moiety easily [11]. When associated to medication; liposomes ensure a high penetration into hair follicles [13]. Solid lipid nanoparticles (SLN)SLNs are colloidal carriers with size varying from 50 nm to 1000 nm. In these particles, Lipids (physiological lipids) are dispersed in an aqueous solution of surfactant or water [14]. SLNs possess various favourable properties viz., a) Presence of physiological and biodegradable lipids with low toxicity b) Occlusive properties which increase skin moisture level, c) Having a small size which ensures increased penetration of active ingredients, and d) Possessing characteristics of physical sunscreens of their own. These properties have made them popular in cosmetics [15,16]. SLNs have also been employed as topical vehicles for perfumes. When perfumes or fragrances are incorporated in SLNs, their release is delayed giving a prolonged effect of the perfume [17]. Nanostructured lipid carrier (NLC)NLC particles are manufactured by using blends of solid lipids with oils (liquid lipids).The solid lipid component is usually kept in a ratio of 70:30 while for oils, the preferred ratio is 99.9: 0.1. The overall melting point of such formulations decrease in comparison to the pure solid lipid which can be exp...

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Recent advances in microcavity plasma devices and arrays: a versatile photonic platform

Cited by 65 publications

References 11 publications

Excitation dynamics of micro-structured atmospheric pressure plasma arrays

Excitation dynamics of micro-structured atmospheric pressure plasma arrays

Microdischarges for use as microthrusters: modelling and scaling

Therapeutic and Diagnostic Applications of Nanotechnology in Dermatology and Cosmetics

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