Reported in the Oct. 29 issue of Optics Express, due out Monday, the Cornell team showcases a new design for a "lab-on-a-chip" structure that provides the ability to move or sort particles using light. In addition to the advance in telecom and datacom applications this brings, the new architecture also lends itself to applications in biodetection, including the sorting of viruses and protein recognition.
This novel architecture, created by lead researcher Michal Lipson and her group and David Erickson and his group, is made up of a field of solid core waveguides. The waveguides are fabricated from SU-8, a material whose mechanical hardness and chemical resistance make it a source for use in lab-on-chip analysis systems. The waveguides used in the device achieve a much more efficient sorting process, which enables trapping and sorting much smaller spheres with much lower intensities than what has been previously reported. By integrating these waveguides on a chip, a massive parallel sorting system may be created. This sorting system would allow for hundreds of measurements in parallel on a 1x1 cm chip, introducing a portable system that provides greater efficiency and lower cost than the current methodologies.
This is the first demonstration of complete integration of planar optical waveguides with microfluidic ones.
This integrated system allows researchers to use light to control the movement of particles in a pressure-driven flow.
The planar optofluidic architecture developed represents a simple yet functional optical manipulation system for lab-on-chip applications.
The use of planar photonic structures in microfluidic devices removes the need for table-top free-space optics, potentially reducing costs and increasing platform portability.
Such a system could find application in high-stability particle trapping and sorting, but also in biodetection by exploiting the strong light interaction between the particle and the evanescent field.
Colleen Morrison | EurekAlert!
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Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
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At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
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Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
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UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration
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