and UV LIGHT to Isolate, Extract Contaminants In a new paper published this week in Nature Communications,
and ultraviolet (UV LIGHT to quickly isolate and extract a variety of contaminants from soil and water.
Brandl had synthesized previously polymers that could be cleaved apart by exposure to UV LIGHT. But he and Bertrand came to question their suitability for drug delivery,
since UV LIGHT can be damaging to tissue and cells, and doesn penetrate through the skin.
When they learned that UV LIGHT was used to disinfect water in certain treatment plants, they began to ask a different question. e thought
if they are already using UV LIGHT, maybe they could use our particles as well, Brandl says. hen we came up with the idea to use our particles to remove toxic chemicals, pollutants,
because we saw that the particles aggregate once you irradiate them with UV LIGHT. trap for ater-fearingpollutionthe researchers synthesized polymers from polyethylene glycol,
But when exposed to UV LIGHT, the stabilizing outer shell of the particles is shed, and now nrichedby the pollutants they form larger aggregates that can then be removed through filtration, sedimentation,
The impulses stimulate the retina remaining cells, resulting in the corresponding perception of patterns of light in the brain.
and to block light, heat or cold. These (as you may have guessed) are quite effective, which has slowed the adoption of relatively expensive and seemingly unnecessary electronically controlled window tinting.
and fully altering the color temperature of transmitted light. They can be integrated easily into new windows
but still allow 90 percent (or more) of the available light in. Or, a setting change could dim the entering light
or change the color of the light along a spectrum from cooler blue to warmer yellow The image to the above right shows the different potential states the window tiles could operate In this is a mock-up based on the results from the single device.
The video below is an exciting presentation from the researchers on where they see this technology ending up.
The interaction of incoming light with each electrophoretic pixel (two electrodes) depends on the position of the particles relative to these electrodes,
and the light can be scattered (white state), or not (dark-state), or somewhere in-between (grey scale).
E-ink devices are fabricated normally using photolithography which is the same technology used to pattern microchips
and exposed it to ultraviolet light, which is found in the sun rays and breaks down many materials.
or other microorganisms that respond to light, or creates molecules to do so, and put them into nerve cells to transform them
by inserting the right molecules and shining light at them. The light wakes up the right proteins, allowing messages to flow through and then bringing out the same behaviour in cells around them n
A tiny microscope enlarges the contents of a few drops of semen inside a pipette, lit by a backlight.
The light beams the moving image to the ipad camera, and algorithms then analyze the sample for total sperm count and motility,
#Four Tech Breakthroughs at the Cutting edge of Light During these dark winter months, spare a thought for artificial lights.
From strings of lights adding holiday cheer to artificial sunlamps alleviating seasonal affective disorder, they brighten our days.
The United nations designated 2015 as the International Year of Light and Light-Based Technologies to raise awareness of how photonic technologies offer solutions to international challenges.
Light technology is now an active area of research in energy, health and agriculture. First lighting the way In the late 1800s
long-lasting light source that significantly changed our work, play and sleep habits. The ability to control light in new ways transformed how we experience
and see the world. Light-based technologies such as optical fiber networks allow us to connect rapidly with people worldwide over the internet.
which received Lux Awards 2014 Light source Innovation of the Year, can fill a room ceiling mimicking sunlight from different latitudes, from the equator to Northern europe.
The key to its success in replicating a sunny sky uses nanostructured materials to scatter light from LEDS in the same way tiny particles scatter sunlight in the atmosphere so-called Rayleigh scattering.
the missing color for producing white light was blue. Isamu Akasaki, Hiroshi Amano, and Shuji Nakamura cracked the blue conundrum in the early 1990s.
Now, thanks to their work, white light LEDS are ubiquitous. In recognition of this energy saving invention, they received the Nobel prize in Physics last year.
Light was recognized also in the Nobel prize category of Chemistry last year for light-based microscopy tools that use a few tricks to sense the presence of a single molecule.
Microscopy had been limited by diffraction, where two adjacent objects can only be resolved if they are separated by more than half the wavelength of light used for imaging.
But Nobel laureates Eric Betzig Stefan Hell and W. E. Moerner all took different approaches using similar principles to get beyond the diffraction barrier
in order to control the fluorescence of individual molecules to view them in high detail. By turning the light emitted from the molecules on or off,
the scientists could reconstruct the location of the molecules at the nanometer scale. Here how it works:
a fraction of fluorescent molecules or proteins is excited first by a weak light pulse. Then after their emission fades, another subgroup of fluorescent molecules are excited.
Investors must see the light Light is a unifying science across fields like chemistry and physics
But learning how to manipulate light is costly and takes time. Technologies are built largely on investments in basic science research as well as, of course, serendipity and circumstantial opportunities.
These tiny lasers are promising light sources that can be used to send and receive data with high bandwidths as well as to detect trace molecules or bio-agents.
The UN designation of this International Year of Light will spotlight the potentials of these kinds of innovations
From new ways to shake off those winter blues to manipulating light in small spaces, the trajectory for artificial light is bright indeed n
#Greased Lightning! NASA Drone Advances Unmanned Craft A huge, 10-engine drone dubbed"Greased Lightning"successfully completed a series of flight tests recently,
"Raman and infrared spectroscopy are the two tools that one uses to see molecular structure, "Bhargava said."
We use spectroscopy to confirm the formulation as well as visualize the delivery of the particles and drug molecules."
"We can make them glow at a certain wavelength and also we can tune them to release the drugs in the presence of the cellular environment.
In graphene, infrared light launches ripples through the electrons at the surface of this metallike material called surface plasmon polaritons that the researchers were able to control using a simple electrical circuit.
Infrared light can also launch polaritons within a different type of two-dimensional crystal called hexagonal boron nitride.
a device made of hbn would confine phonon polaritons to a single narrow range of wavelengths and amplitudes.
As a result, this human-made material manipulates electromagnetic radiation-light-in ways never observed in natural materials.
Leti Experts also Will Speak at Techxpot Session on MEMS and STS Session on Lithography Cost-and-Productivity Issues Below 14nm June 22nd, 2015fabricating inexpensive, high-temp SQUIDS for future
Columbia engineers and colleagues create bright, visible light emission from one-atom thick carbon June 15th, 2015research partnerships Lancaster University revolutionary quantum technology research receives funding boost June 22nd, 2015fabricating inexpensive, high-temp SQUIDS for future electronic devices June 22nd,
They showed how a single nanoresonator can manipulate light to cast a very large"reflection."
"Making an object look 10,000 times larger than its physical size has lots of implications in technologies related to light,
Much like sound, light can resonate, amplifying itself as the surrounding environment manipulates the physical properties of its wave energy.
which the wavelength of light is much larger than in a vacuum, which allows light waves to resonate more powerfully.
The device condenses light to a size smaller than its wavelength meaning it can gather a lot of light energy,
and then scatters the light over a very large area, harnessing its output for imaging applications that make microscopic particles appear huge."
In addition, Yu envisions simply letting the resonator emit that energy in the form of infrared light toward the sky,
"This research opens up a new way to manipulate the flow of light, and could enable new technologies in light sensing and solar energy conversion,
issue of Physical Review Letters("Strong Asymmetric Charge Carrier Dependence in Inelastic Electron Tunneling Spectroscopy of Graphene Phonons").
The technique, called inelastic electron tunneling spectroscopy, elicits only a small blip that can be hard to pick out over more raucous disturbances."
using ultraviolet light. The end result is safe drinking water that also tastes good. Earlier this year, Wrights team won a grant from the United states Agency for International Development (USAID),
The movement of electrons caused by friction was able to generate enough energy to power the lights
They showed how a single nanoresonator can manipulate light to cast a very large"reflection."
"Making an object look 10,000 times larger than its physical size has lots of implications in technologies related to light,
Much like sound, light can resonate, amplifying itself as the surrounding environment manipulates the physical properties of its wave energy.
which the wavelength of light is much larger than in a vacuum, which allows light waves to resonate more powerfully.
The device condenses light to a size smaller than its wavelength meaning it can gather a lot of light energy,
and then scatters the light over a very large area, harnessing its output for imaging applications that make microscopic particles appear huge."
In addition, Yu envisions simply letting the resonator emit that energy in the form of infrared light toward the sky,
"This research opens up a new way to manipulate the flow of light, and could enable new technologies in light sensing and solar energy conversion,
and ultraviolet (UV LIGHT to quickly isolate and extract a variety of contaminants from soil and water.
Nanoparticles that lose their stability upon irradiation with light have been designed to extract endocrine disruptors, pesticides,
Brandl had synthesized previously polymers that could be cleaved apart by exposure to UV LIGHT. But he and Bertrand came to question their suitability for drug delivery,
since UV LIGHT can be damaging to tissue and cells, and doesn penetrate through the skin.
When they learned that UV LIGHT was used to disinfect water in certain treatment plants, they began to ask a different question. e thought
if they are already using UV LIGHT, maybe they could use our particles as well, Brandl says. hen we came up with the idea to use our particles to remove toxic chemicals, pollutants,
because we saw that the particles aggregate once you irradiate them with UV LIGHT. A trap for ater-fearingpollution The researchers synthesized polymers from polyethylene glycol,
But when exposed to UV LIGHT, the stabilizing outer shell of the particles is shed, and now nrichedby the pollutants they form larger aggregates that can then be removed through filtration, sedimentation,
reportedly harvests the electromagnetic radiation transferring to and from mobile phones and converts it into direct current (DC) electrical energy,
#Living lasers made by injecting oil droplets into human cells Light fantastic (Image: Matja Humar and Seok Hyun Yun) Individual cells have been turned into tiny lasers. t actually super-easy,
Humar and his colleagues developed three ways to get cells to emit visible light. The first involved injecting each one with a tiny oil droplet,
Shining a light pulse on to the cavity excited the dye atoms into emitting light in a tightly focused beam.
but this produces a relatively broad range of wavelengths, making it difficult to distinguish between differently tagged cells.
However laser light is characterised by having an extremely narrow range of wavelengths. That means it is theoretically possible,
#Boron Turns Graphene into Blue light Emitter FRANKFURT, Germany, July 14, 2015 Chemists at Goethe University Frankfurt have developed a new class of organic luminescent materials through the targeted introduction of boron
Data transmission via light could be the answer to the call for a faster and more energy efficient data flow on computer chips as well as between different board components.
Through optical fibres signal propagation is almost lossless and possible across various wavelengths simultaneously: a speed advantage
Neither element is very efficient as a light source however. They are classed among the indirect semiconductors.
In contrast to direct semiconductors they emit mostly heat and only a little light when excited.
Gesn absorbs and emits light in a wavelength range of about 3 micrometres. Many carbon compounds such as greenhouse gases
or biomolecules also display strong absorption lines at this boundary between near and mid-wavelength infrared.
and fluorescence spectroscopy as well as UV curing and disinfection. A further application field is plant lighting, for
and manufactured a module enabling irradiation with UV-B light of a specific wavelength. In this particular case, LEDS emitting at a wavelength around 310 nm are used to stimulate health-promoting secondary metabolites in plants.
The optical power can be adjusted flexibly between 0 and 100%.%The novel concept was tested successfully in experiments at the Institute of Vegetable and Ornamental Crops (IGZ.
Arrayat the fair, the FBH exhibits novel dual-wavelength diode lasers that are suitable for use in miniaturized, portable laser measurement systems for Raman spectroscopy applications.
The laser sources alternatingly emit light from only one chip at two different stabilized wavelengths, which are defined by gratings implemented into the semiconductor chip.
Wavelength selection is realized by separately addressable sections within the laser. The innovative diode laser chip is ideally applicable for SERDS (Shifted Excitation Raman Difference Spectroscopy),
enabling to measure Raman spectra under real-world conditions even in highly fluorescent environments and when exposed to daylight.
Moreover, SERDS improves the detection limit by one order of magnitude compared to standard Raman spectroscopy. With these FBH tiny monolithic light sources on chip level, a compact SERDS measurement head that is only as small as a laser pointer was realized for the first time.
This device is the basis for a unique miniaturized and versatile SERDS spectroscopy system, enabling in-situ measurements in various security and health relevant fields including biology, medicine, food control, and pharmacy.
Applications in absorption spectroscopy and for generating terahertz radiation are also conceivable. Arrayfiber-coupled demonstrators newly developed at FBH for industrial use aim at integrating laser radiation with high spectral brightness into various systems
thus enabling easier usage. Now, efficient and compact laser sources are at hand emitting in the near-infrared on multi-watt level (CW operation) with a narrow-band spectrum and a stigmatic, nearly Gaussian laser beam
and packages, covering the wavelength range from 630 nm to 1180 nm. Single emitters with a stripe width of 90 m, for example, reach peak brilliance results with 3. 5 W/mm-mrad.
For rapid prototyping applications the FBH has developed DBR ridge waveguide (RW) lasers with 24 individually addressable emitters featuring a wavelength spacing>0. 3 nm and a spectral width<1 pm.
They showed how a single nanoresonator can manipulate light to cast a very large"reflection."
"Making an object look 10,000 times larger than its physical size has lots of implications in technologies related to light,
Much like sound, light can resonate, amplifying itself as the surrounding environment manipulates the physical properties of its wave energy.
which the wavelength of light is much larger than in a vacuum, which allows light waves to resonate more powerfully.
The device condenses light to a size smaller than its wavelength meaning it can gather a lot of light energy,
and then scatters the light over a very large area, harnessing its output for imaging applications that make microscopic particles appear huge."
In addition, Yu envisions simply letting the resonator emit that energy in the form of infrared light toward the sky,
"This research opens up a new way to manipulate the flow of light, and could enable new technologies in light sensing and solar energy conversion,
Silicon solar cells generate electricity by absorbing photons of visible and infrared light, while perovskite cells harvest only the visible part of the solar spectrum where the photons have more energy.
Colin Bailie, Stanford bsorbing the high-energy part of the spectrum allows perovskite solar cells to generate more power per photon of visible light than silicon cells,
or light it likely will degrade. We have a ways to go to show that perovskite solar cells are stable enough to last 25 years.
They used spectroscopy to confirm the formulation as well as visualize the delivery of the particles and drug molecules.
Scientists also can make them glow at certain wavelengths and tune them to release the drugs in the presence of the cellular environment.
The friction was strong enough for the electrodes to harvest enough energy to power the lights,
and exposed it to ultraviolet light, which is found in the sun rays and breaks down many materials.
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