Liquid crystals are most recognized in the form of liquid crystal displays (LCDs)—found in everything from digital watches to notebook computers and flat-panel desktop monitors. But liquid crystals are far more talented than that. In the August 1 issue of the journal Science, for example, University of Wisconsin chemical engineer Nicholas Abbott reported a big step toward using them in flexible, inexpensive "smart-paper" displays, and in ultra-sensitive detectors for biomolecules or toxic chemicals.
Smart paper and biochemical sensors may seem very different, says Abbott, who did this work at Wisconsins Materials Research Science and Engineering Center, one of 27 such centers funded by the National Science Foundation. "But the unifying theme of our work is that a thin layer of liquid crystal can greatly amplify a wide range of activities on the underlying surface."
In earlier work, for example, he and his colleagues showed that when proteins or other small molecules were captured on a specially prepared surface, they would perturb the liquid crystal immediately above. But the long, thin molecules in the fluid are always trying to line up in the same direction, says Abbott; thats why theyre called "liquid crystals" in the first place. So the tiny distortions caused by the bound molecule propagate upward through the liquid for a tenth of a millimeter or so—a vast distance on a molecular scale. The result is a large, easily detectable change in the optical properties of the liquid crystal.
M. Mitchell Waldrop | NSF
Drones can almost see in the dark
20.09.2017 | Universität Zürich
World first: 'Storing lightning inside thunder'
18.09.2017 | University of Sydney
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
For the first time, physicists have successfully imaged spiral magnetic ordering in a multiferroic material. These materials are considered highly promising candidates for future data storage media. The researchers were able to prove their findings using unique quantum sensors that were developed at Basel University and that can analyze electromagnetic fields on the nanometer scale. The results – obtained by scientists from the University of Basel’s Department of Physics, the Swiss Nanoscience Institute, the University of Montpellier and several laboratories from University Paris-Saclay – were recently published in the journal Nature.
Multiferroics are materials that simultaneously react to electric and magnetic fields. These two properties are rarely found together, and their combined...
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems Holding GmbH about commercial use of a multi-well tissue plate for automated and reliable tissue engineering & drug testing.
MBM ScienceBridge GmbH successfully negotiated a license agreement between University Medical Center Göttingen (UMG) and the biotech company Tissue Systems...
Pathogenic bacteria are becoming resistant to common antibiotics to an ever increasing degree. One of the most difficult germs is Pseudomonas aeruginosa, a...
19.09.2017 | Event News
12.09.2017 | Event News
06.09.2017 | Event News
20.09.2017 | Life Sciences
20.09.2017 | Power and Electrical Engineering
20.09.2017 | Physics and Astronomy