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30 Dec 2002

Volume 81, Issue 27, pp. 5099-5257

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Patterned low temperature copper-rich deposits using inkjet printing

Gregor G. Rozenberg, Eric Bresler, Stuart P. Speakman, Chris Jeynes, and Joachim H. G. Steinke

Appl. Phys. Lett. 81, 5249 (2002); http://dx.doi.org/10.1063/1.1481985 (3 pages) | Cited 28 times

Online Publication Date: 19 December 2002

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A PZT piezoelectric ceramic research drop-on-demand inkjet print head operating in bend mode was used as a means of delivering a copper precursor, vinyltrimethylsilane copper (+1) hexafluoroacetylacetonate, in a controlled and placement accurate fashion. The reagent disproportionates at low temperature (<200 °C), to deposit copper on glass. These deposits are shown to be more than 90% copper by weight by electron probe microanalysis and microbeam Rutherford backscattering spectroscopy. Microscopy shows a deposit diameter and three-dimensional profile that suggests a complex deposition and conversion mechanism. Our findings represent an important step towards the manufacture of electronic devices by entirely nonlithographic means. © 2002 American Institute of Physics.
Show PACS
81.15.Lm Liquid phase epitaxy; deposition from liquid phases (melts, solutions, and surface layers on liquids)
68.55.A- Nucleation and growth
68.55.Nq Composition and phase identification
82.40.Np Temporal and spatial patterns in surface reactions
85.40.Sz Deposition technology
82.65.+r Surface and interface chemistry; heterogeneous catalysis at surfaces
82.30.Lp Decomposition reactions (pyrolysis, dissociation, and fragmentation)
82.80.Yc Rutherford backscattering (RBS), and other methods of chemical analysis

Acoustic field in a thermoacoustic Stirling engine having a looped tube and resonator

Yuki Ueda, Tetsushi Biwa, Uichiro Mizutani, and Taichi Yazaki

Appl. Phys. Lett. 81, 5252 (2002); http://dx.doi.org/10.1063/1.1533113 (3 pages) | Cited 17 times

Online Publication Date: 19 December 2002

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S. Backhaus and G. W. Swift [Nature 399, 335(1999)] have built a prototype thermoacoustic Stirling engine based on traveling wave energy conversions, and demonstrated that its efficiency reached above 40% of the Carnot efficiency. We experimentally investigate an acoustic field in the engine through simultaneous measurements of velocity U and pressure P. By focusing on the phase lead Φ of U relative to P in its regenerator, we find that the engine can achieve such a high efficiency by the negative Φ about −20° rather than a traveling wave phase (Φ = 0). © 2002 American Institute of Physics.
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43.35.Ud Thermoacoustics, high temperature acoustics, photoacoustic effect
07.20.Pe Heat engines; heat pumps; heat pipes

Development of microthermophotovoltaic system

W. M. Yang, S. K. Chou, C. Shu, Z. W. Li, and H. Xue

Appl. Phys. Lett. 81, 5255 (2002); http://dx.doi.org/10.1063/1.1533847 (3 pages) | Cited 28 times

Online Publication Date: 19 December 2002

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A power microelectromechanical concept, a microthermophotovoltaic system, is described in this work. The system uses hydrogen as fuel and is capable of delivering 4.5 W of electrical power to a microcombustor 0.1 cm3 in volume. It does not involve any moving parts. Its fabrication and assembly are relatively easy. As a result, it can be more commonly used in commercial electronics and microdevices. © 2002 American Institute of Physics.
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84.60.Jt Photoelectric conversion
85.85.+j Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
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