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12-01 :: January 2012

nanotimes News in Brief

(PoF) communications cable being developed by engineers at Sandia National Laboratories.

Steve Sanderson, Titus Appel and Walter Wrye of Sandia National Laboratories are co-inventors of a hybrid cable design that uses fiber to send and regulate optical power to the communications electronics integral to the cable. A patent is pen- ding on the design. The developers envision their cable replacing existing copper cables in applica- tions related to safety, such as security, explosives, explosion-proof devices, aviation and medical devices.

“The PoF cable has power limitations,” Sanderson said. “It’s not to be construed as a means to power your house, for example, or handle the high speeds of a computer network. But because there are growing needs of low-power sensor/control applica- tions related to safety, having convenient optically generated power available is a tremendous benefit.”

The PoF cable ends resemble a typical copper elec- trical cable with pin and socket connectors. Ho- wever, optical interface circuits integrated into the connector housing, called a backshell, provide fiber optic transmission of both data communications and optical power. To conserve energy, optical power is delivered only on demand, Sanderson said.

http://www.sandia.gov

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a vital parameter in the separation through a nano- pore. In this study, they have simulated high-density lipoprotein (HDL) and low-density lipoprotein (LDL) as the sample nanoparticles to demonstrate the capability of such a platform. Numerical results suggest that efficient separation of HDL from LDL in a 0.2M KCL solution (resembling blood buffer) through a 150nm pore is possible if the pore sur- face charge density is ~ -4.0mC/m2

. Moreover,

they observe that pore length and diameter are re- latively less important in the nanoparticle separation process considered here. © ELECTROPHORESIS

Talukder Z. Jubery, Anmiv S. Prabhu, Min J. Kim, Pras- hanta Dutta: Modeling and simulation of nanoparticle separation through a solid-state nanopore, In: ELECTRO- PHORESIS, Volume 33, Issue 2, January 2012, Pages 325- 333, DOI: 10.1002/elps.201100201: http://dx.doi.org/10.1002/elps.201100201

Researchers at Boston University (US) investigate photonic-plasmonic mode coupling in a new class of optoplasmonic materials that comprise dielec- tric microspheres and noble metal nanostructures in a morphologically well-defined on-chip platform.

Researcher at Washington State University and Drexel University, both USA, reveal in a numerical study that membrane pore surface charge density is

Discrete networks of optoplasmonic elements, re- ferred to as optoplasmonic molecules, were genera- ted through a combination of top-down fabrication and template-guided self-assembly. This approach facilitated a precise and controllable vertical and horizontal positioning of the plasmonic elements relative to the whispering gallery mode (WGM) microspheres. The plasmonic nanostructures were positioned in or close to the equatorial plane of the

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