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Recent News and Articles on the Keywords: more efficient + semiconductor membrane + membrane  Related to the article below (Last Update: 5/5/2008)

Cleaning is the underrated factor in parts production
Reliable Plant Magazine, OK - Apr 7, 2008
In this respect, effective, ideally matched filtration and separation systems are in demand (eg oil separators, particle filters, membrane filters and water ...
Source: Google News

Design and fabrication of zeolite-based microreactors and membrane microseparators -
YSS Wan, JLH Chau, A Gavriilidis, KL Yeung - Microporous and Mesoporous Materials, 2001 - Elsevier
... utilization leading to more efficient chemical production ... such as extraction and
membrane separation have ... uses traditional semiconductor fabrication procedure ...

InGaAsP photonic band gap crystal membrane microresonators -
A Scherer, O Painter, BD?Urso, R Lee, A Yariv - Journal of Vacuum Science & Technology B: Microelectronics …, 1998 - link.aip.org
... them with a 980 nm semiconductor laser focused ... the luminescence intensity from the
membrane microresonator was ... direct result of the more efficient coupling of ...

… patch-clamp techniques for high-resolution current recording from cells and cell-free membrane … -
OP Hamill, A Marty, E Neher, B Sakmann, FJ … - Pfl?gers Archiv European Journal of Physiology, 1981 - Springer
... by "leakage channels" in the membrane patch, the ... 5534, Signetics or LF 356, National
Semiconductor) are chosen ... noise, especially above 1 kHz; more critical for ...

… on various reactor configurations for coupling photocatalysis and membrane processes in water … -
R Molinari, L Palmisano, E Drioli, M Schiavello - Journal of Membrane Science, 2002 - Elsevier
... Other authors immobilize the semiconductor on Pyrex glass ... order to test the membrane
reactor performance ... This configuration was more efficient with respect to ...

… a tool for investigating the biochemical and biophysical properties of membrane protein systems. II … -
Z Salamon, HA Macleod, G Tollin - BBA-Reviews on Biomembranes, 1997 - Elsevier
... location of the metal (or semiconductor) film ... 1), which is more convenient and is
used ... lipid bilayer membranes containing integral membrane proteins interacting ...

Photocatalytic membrane reactors for degradation of organic pollutants in water -
R Molinari, C Grande, E Drioli, L Palmisano, M … - Catalysis Today, 2001 - Elsevier
... appeared to be some polycrystalline semiconductor solids such ... was continuously recycled
(batch membrane system), while ... catalyst permits a more efficient use of ...

Ultra-low loss photonic integrated circuit with membrane-type photonic crystal waveguides -
S McNab, N Moll, Y Vlasov - Optics Express, 2003 - opticsinfobase.org
... high performance complementary metal oxide semiconductor (CMOS) ICs ... size converter
is not as efficient for TM ... Fabry-Perot oscillations are more pronounced and ...

Micromachined ultrasonic transducers: 11.4 MHz transmission in air and more -
I Ladabaum, BT Khuri-Yakub, D Spoliansky - Applied Physics Letters, 1996 - link.aip.org
... the increased complexity of the more efficient devices reduces ... actuation and detection
offer more promise than ... procedures invented by the semiconductor industry ...

Photocatalytic oxidation of organics using a porous titanium dioxide membrane and an efficient … -
A Gonzalez-Martin, OJ Murphy, C Salinas - US Patent 6,136,186, 2000 - freepatentsonline.com
... for the concentration of more light per ... a process and apparatus wherein efficient
photocatalytic oxidation ... over a solid, porous semiconductor photocatalyst and ...

Hollow fiber membrane contactors -
A Gabelman, ST Hwang - Journal of Membrane Science, 1999 - Elsevier
... an important advantage in semiconductor manufacturing ... 4-ol and citronellal, and the
membrane contactor was reportedly an order of magnitude more efficient. ...

Source: Google Scholar

New Design Of Semiconductor Membranes More Efficient Than Biological Membranes
A semiconductor membrane designed by researchers at the University of Illinois could offer more flexibility and better electrical performance than biological membranes. Built from thin silicon layers doped with different impurities, the solid-state membrane also could be used in applications such as single-molecule detection, protein filtering and DNA sequencing.

"By creating nanopores in the membrane, we can use the membrane to separate charged species or regulate the flow of charged molecules and ions, thereby mimicking the operation of biological ion channels," said lead researcher
Jean-Pierre Leburton, the Stillman Professor of Electrical and Computer Engineering at Illinois.

Leburton, with postdoctoral research associate Maria Gracheva and graduate student Julien Vidal, simulated the operation of the semiconductor membrane at a number of electrostatic potentials. They report their findings in a paper accepted for publication in the journal Nano Letters, and posted on the journal's Web site.

In the researchers' model, the nanopore-membrane structure is made of two layers of silicon, each 12 nanometers thick, with opposite (n- and p-) doping. The electrostatic potential is positive on the n-side and negative on the p-side of the membrane.

The nanopore has an hourglass shape, with a neck 1 nanometer in diameter and openings on each side of the membrane 6 nanometers in diameter. The 'size' of the nanopore can be changed by changing the electrostatic potential around it.

By controlling the flow of ions, the artificial nanopore offers a degree of tunability not found in biological ion channels, said Leburton, who also is a researcher at the university's Beckman Institute, the Coordinated Research Laboratory, and the Micro and Nanotechnology Laboratory.
In addition to serving as a substitute for biological ion channels, the solid-state nanopore and membrane could be used in other applications, including sequencing DNA.

"Using semiconductor technology to sequence the DNA molecule would save time and money," Leburton said. "By biasing the voltage across the membrane, we could pull DNA through the nanopore. Since each base pair carries a different electrical charge, we could use the membrane as a p-n junction to detect the changing electrical signal."

Funding was provided by the National Science Foundation and the National Institutes of Health.

Source: James E. Kloeppel
University of Illinois at Urbana-Champaign
 
 
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