Results 191 to 200 of about 271,977 (249)
Small, EarlyView.This Review presents a cross‐scale framework for single‐atom catalysts, spanning in‐plane and out‐of‐plane coordination; primary coordination, secondary‐sphere interactions, through‐space microenvironments and support interfaces; individual sites and macroscopic architectures; and static design and directed dynamic reconstruction.
Dazhi Yao +4 more
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Small, EarlyView.Hybrid 1D–2D architectures redefine material design strategies for TFLIBs by decoupling competing performance parameters. This approach accelerates the transition of TFLIBs from proof of concept to practical wearable technologies. ABSTRACT Transparent and flexible lithium‐ion batteries (TFLIBs), enabled by advanced nanomaterials and flexible ...
Raviraj Madesan, Anand Sreekantan Thampy
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Small, EarlyView.NaCl‐templated FeS microspheres with a conformal N‐doped carbon coating are synthesized via scalable spray pyrolysis and subsequent surface engineering. The interconnected porous framework accelerates Na+ transport and alleviates structural degradation during cycling. Benefiting from enhanced electrochemical kinetics and mechanical robustness, FeS‐NaCl@
Ji Myeon Park +10 more
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Observations of hollow cathode light emission from a transient hollow cathode discharge
Applied Physics Letters, 1991 Experimental observations are presented on the light emission from the hollow cathode region of a pulsed hollow cathode discharge. A 2 mJ, 30 ns, 1.06 μm laser pulse incident on the back of the cathode is used to trigger the discharge. The temporal evolution of the light emission from this region is recorded in 50 nm spectral bands.
WYNDHAM, E +3 more
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Physical Processes in Hollow Cathodes
AIAA Journal, 1976Hollow cathodes with cavity diameters of 1.9 cm have been operated in an MPD arc configuration at discharge currents from 0.25 kA to 30 kA. Current and potential distributions, measured with probes in the cathode cavity, show that a spontaneous mode of hollow cathode operation, wherein the current distribution penetrates upstream into the cavity, has ...
M. KRISHNAN +3 more
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Dependence of cathode aperture in pulsed hollow‐cathode discharges
Applied Physics Letters, 1992 The effect of electric field penetration in the hollow-cathode region of self-initiated pulsed hollow-cathode discharge is investigated. The discharge is operated in hydrogen at pressures between 30 and 200 mTorr with applied voltages between 10 and 30 ...
Mario Favre, H Chuaqui, E Wyndham
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SERT II - Durability of the hollow cathode and future applications of hollow cathodes
Journal of Spacecraft and Rockets, 19701 Kerslake, W. R., Byers, D. C., and Staggs, J. F., "SERT II Experimental Thruster System," AIAA Paper 67-700, Colorado Springs, Colo., 1967; also "SERT II: Mission and Experiments," Journal of Spacecraft and Rockets, Vol. 7, No. 1, Jan. 1970, pp. 4-6. 2 Kerrisk, D. J. and Kaufman, H. R., "Electric Propulsion Systems for Primary Spacecraft Propulsion,"
VINCENT K. RAWLIN, WILLIAM R. KERSLAKE
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Effect of gas and cathode material on the r.f. hollow cathode reactive PVD
Surface and Coatings Technology, 1999 The process of generation of the radio frequency (r.f.) hollow cathode discharge was examined for different gases and different materials of the r.f. electrode. The delivered r.f.
Hana Barankova
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Hollow Cathode Discharge with Thermionic Cathodes
Journal of Applied Physics, 1971The electrical and visual characteristics of a dc hollow cathode discharge with indirectly heated thermionic cathodes were obtained in argon at a few Torr. Two facing planar cathodes of variable separation form the hollow cathode geometry. A hollow cathode effect was observed in the ``ball-of-fire'' mode and in the ``low-voltage arc'' mode. The results
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Cathode Sputtering in Hollow Cathode Discharges
Journal of the Physical Society of Japan, 1962In order to investigate the processes responsible for a negative resistance of the hollow cathode discharge, several discharge parameters are measured with a Langmuir probe. The vapor density distributions of the sputtered cathode metal are measured by the absorption method of the resonance radiation of the metal atom. Almost all the metal atoms in the
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