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5 Mar 2007

Volume 90, Issue 10, Articles (10xxxx)

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Appl. Phys. Lett. 90, 101901 (2007); http://dx.doi.org/10.1063/1.2712772 (3 pages)

S. N. Yi, Jong H. Na, Kwan H. Lee, Anas F. Jarjour, Robert A. Taylor, Y. S. Park, T. W. Kang, S. Kim, D. H. Ha, G. Andrew, and D. Briggs
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Influence of wall-charge accumulation on the gas dielectric barrier discharge in alternating current plasma display panel

Bingang Guo, Wei Wei, Tsutae Shinoda, and Chunliang Liu

Appl. Phys. Lett. 90, 101501 (2007); http://dx.doi.org/10.1063/1.2710781 (3 pages) | Cited 7 times

Online Publication Date: 5 March 2007

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Influences of wall-charge accumulation on gas dielectric barrier discharge (DBD) breakdown threshold and sustaining voltage margin of alternating current plasma display panel (AC-PDP) were investigated. It is observed that wall-charge accumulation results in a remarkable increase of gas DBD breakdown threshold during sustaining discharge period. Sustaining voltage margin is reduced by the threshold increase. A larger margin can be obtained when the threshold is decreased by removing unfavorable influence of wall-charge accumulation. Compared with normal margin, improved margin has a larger value and a faster linear increase with increasing wall-charge voltage. That indicates a way to improve AC-PDP performances remarkably.
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52.75.-d Plasma devices
52.80.-s Electric discharges
52.40.Hf Plasma-material interactions; boundary layer effects

Mode transition in radio-frequency atmospheric argon discharges with and without dielectric barriers

J. J. Shi and M. G. Kong

Appl. Phys. Lett. 90, 101502 (2007); http://dx.doi.org/10.1063/1.2711413 (3 pages) | Cited 11 times

Online Publication Date: 5 March 2007

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In this letter, basic characteristics of glow modes and their mode transition are studied for radio-frequency (rf) atmospheric argon discharges with bare and dielectrically insulated electrodes. Through input power control, large-volume rf atmospheric argon discharges with bare electrodes are achieved in the α mode via an abrupt transition from a constricted γ mode, whereas dielectrically insulated electrodes result in large argon discharges in both the α and γ modes with gradual mode transition. Current dependence of the 750 nm line intensity and of the gas temperature are shown to capture clearly the signature of mode transition.
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52.80.Pi High-frequency and RF discharges
52.80.Hc Glow; corona
52.40.Hf Plasma-material interactions; boundary layer effects
52.35.Qz Microinstabilities (ion-acoustic, two-stream, loss-cone, beam-plasma, drift, ion- or electron-cyclotron, etc.)
52.25.Os Emission, absorption, and scattering of electromagnetic radiation

On the production of energetic neutrals in the cathode sheath of direct-current discharges

Tsuyohito Ito and Mark A. Cappelli

Appl. Phys. Lett. 90, 101503 (2007); http://dx.doi.org/10.1063/1.2711416 (3 pages) | Cited 3 times

Online Publication Date: 5 March 2007

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Direct measurements of the energy distribution of energetic neutrals incident onto the cathode of a dc glow discharge are presented. The measurements are performed by time-of-flight analysis of neutrals escaping through a cathode orifice. The experimental results are found to be in excellent agreement with Monte Carlo simulations, although the forward angle of the neutrals considered is limited in the present experimental configuration. It is found that the commonly used theories for the production of energetic neutrals through charge exchange in the cathode sheath do not capture the neutral energy distribution over the range of discharge voltage studied.
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52.80.Hc Glow; corona
52.50.Dg Plasma sources
52.40.Kh Plasma sheaths
52.70.Nc Particle measurements
52.20.Hv Atomic, molecular, ion, and heavy-particle collisions
52.25.Ya Neutrals in plasmas

Suspended nanowire web

Volker Cimalla, Mike Stubenrauch, Frank Weise, Michael Fischer, Katja Tonisch, Martin Hoffmann, and Oliver Ambacher

Appl. Phys. Lett. 90, 101504 (2007); http://dx.doi.org/10.1063/1.2711753 (3 pages) | Cited 6 times

Online Publication Date: 5 March 2007

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A complex three-dimensional, nanowire based nanoarchitecture is presented, which can be processed by high-throughput bottom-up procedures without any high-resolution lithography. It combines the benefits of three self-organization mechanisms to produce nanostructures, i.e., the formation of nanoneedles, the droplet formation out of a thin metal film, and the vapor-liquid-solid growth of nanowires. The principle is demonstrated for a silicon based suspended nanowire web. Cell adherence on this assembly was found to be superior to other nanostructures. The possibility of fluid transport beneath the nanowire web enables improved microcatalyst principles and the realization of novel interfaces for biosensing or bioelectronics.
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68.65.La Quantum wires (patterned in quantum wells)
81.10.Bk Growth from vapor
81.16.Hc Catalytic methods
82.65.+r Surface and interface chemistry; heterogeneous catalysis at surfaces
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