light

Light

Artificial light (6)
Backlight (1)
Beam of light (9)
Blue light (3)
Efficient light (1)
Green light (2)
Infrared light (7)
Light (139)
Light detector (1)
Light pulse (3)
Light source (11)
Monochromatic light (1)
Natural light (2)
Red light (2)
Shining light (1)
Ultraviolet light (53)
Visible light (9)
White light (2)

The basic concept is to equip drug molecules with chemical components that change shape in response to heat or light.

Organic chemist Ben Feringa at Groningen and his co-workers used an existing light-switchable unit called azobenzene,

If the Z-shaped isomer absorbs ultraviolet light, it will become switch to the C-shaped isomer.

The reverse shape change can be induced by visible light or gentle heating at around body temperature. Feringa and colleagues substituted the azobenzene switch for a similar chemical grouping within several variants of an antibacterial molecule called a quinolone,

Or at least they were after exposure to ultraviolet light made them switch to the C-isomer.

and then turned on with light once they reach the part of the body (the throat or lungs, say) where the harmful bacteria are lurking.

Switching on drugs with ultraviolet light is not ideal in practice because it can have harmful effects.

Feringa says he is now working on developing molecules than can be shifted shape with visible light, or better still infrared,

and artificial light conditions and even shaded areas. Solarwindow#uses organic materials, which are dissolved into liquid, ideal for low-cost high-output manufacturing.

A light on the instrument panel indicates when CNG is being used and there is no interruption in the vehicle performance.

When light at a specific wavelength is absorbed by the gas of interest localized heating of the molecules leads to a temperature

and pressure increase in the gas. f the incident light intensity is modulated, then the temperature and pressure will be as well,

using concentrated light as a high-temperature energy source. The project is still at the experimental stage,

The process In a first step concentrated light-simulating sunlight-was used to convert carbon dioxide and water to synthesis gas (syngas) in a high-temperature solar reactor containing metal-oxide based materials developed at ETH Zürich.

The standard mechanism for improving efficiency with a third polymer is by increasing the absorption of light in the device.

and the Advanced Light source at Lawrence Berkeley. ithout that it s hard to get insight about the structureyu says. hat benefits us tremendously. his knowledge will serve as a foundation from

and Technology Canadian Light source Inc. and University of Tennessee contributed to the study. Principal funding came from by the Global climate and Energy project the Precourt Institute for Energy at Stanford and by the US Department of energy.

When light at a specific wavelength is absorbed by the gas of interest localized heating of the molecules leads to a temperature

and pressure increase in the gas. f the incident light intensity is modulated, then the temperature and pressure will be as well,

The nanoparticle is fluorescent in visible light and the nanotubes are fluorescent in the near-infrared.

The breakthrough is in the new system's ability to bind titanium dioxide (Tio2) a photocatalyst that reacts under ultraviolet light.

#New LED light technology sheds light on the future of food LED growing lights, delivering sunlight whatever the weather.

We need to make better use of land, light and logistics for an increasingly urban population.

or grow indoors with the help of artificial lights. Vertical farming is promising because it requires no soil,

and environmental controls that regulate temperature, humidity and light to produce vegetables, fruits and other crops year-round.

Considerable energy is required to power a closed, indoor greenhouse facility s artificial lighting, heating and cooling

This kind of artificial light has an extremely high photoelectric conversion efficiency consuming only one eighth the power of incandescent lamp, half of the power of fluorescent lamp,

and can produce light of varying intensity. Because it produces less heat, the light can be moved closer to the plants.

This increases efficiency, not just in terms of energy use but by allowing layers of growing plants to be packed more densely, making more efficient use of space.

they can be combined to create perfect lighting that provide light on the ideal spectrum for a plant s growth.

Evidence is emerging that specific wavelengths of light have distinct effects on crop yield, quality, and even pest and disease resistance.

There is potential for these multifunctional techno-greenhouses built around LED grow lights to increase the quality of the food we eat

Itl include optimized lights set to a wavelength to grow perfect plants and specialized air-conditioning that keeps temperature and humidity set to a constant level.

by using infrared light). Scientifically viable in 2015; mainstream in 2018; and financially viable in 2019.

vertical farms could augment natural light using energy-efficient lighting. The advantages are numerous, including year-round crop production, protection from weather, support urban food autonomy and reduced transport costs.

then collects and analyzes the light reflected back. The Kickstarter launched Tuesday morning with several funding levels:

shine its blue light onto an object you want to analyze. In a few seconds, the associated smartphone app will take the spectrometer reading,

For instance, amber hallway lights are bright enough for occupants to navigate the corridor, but not disruptive of the human eye production of rhodopsin (which helps us see in darkness,

Blue light during the day helps maintain alertness. The home also features a passive design that maximizes heating

and cooling (the south-facing windows) and natural light and ventilation (the north-facing windows). The property is also five times more water-efficient than the normal house, with low-flow fixtures and short-run hot-water pipes.

because light and oxygen damage the photosynthetic proteins. Usually plants can completely repair this kind of damage,

and other highly reactive molecules produced by light and oxygen, protecting the chloroplasts from damage.

but carbon nanotubes could act as artificial antennae that allow chloroplasts to capture wavelengths of light not in their normal range, such as ultraviolet, green,

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,

and light sources thanks to the unprecedented properties it offers: very low electrical resistance high thermal conductivity and mechanically stretchable yet harder than diamond.

and light emitting devices to be manufactured. Until recently fabrication of TMDCS such as Mos2 has been difficult as most techniques produce only flakes typically just a few hundred square microns in area.

#A nanosized hydrogen generator (Phys. org) esearchers at the US Department of energy's (DOE) Argonne National Laboratory have created a small scale"hydrogen generator"that uses light

"For Rozhkova, this particular building block is inspired by the function of an ancient protein known to turn light into energy.

and platinum and then exposing them to ultraviolet light. There is just one downside: titanium dioxide only reacts in the presence of ultraviolet light,

which makes up a mere four percent of the total solar spectrum. If the researchers wanted to power their generators with sunlight,

In order to produce greater amounts of hydrogen using visible light, the researchers looked for a new material.

Graphene is a super strong, super light, near totally transparent sheet of carbon atoms and one of the best conductors of electricity ever discovered.

both the br protein and the graphene platform absorb visible light. Electrons from this reaction are transmitted to the titanium dioxide on

making the titanium dioxide sensitive to visible light. Simultaneously, light from the green end of the solar spectrum triggers the br protein to begin pumping protons along its membrane.

#Ultra-thin high-speed detector captures unprecedented range of light waves New research at the University of Maryland could lead to a generation of light detectors that can see below the surface of bodies walls and other objects.

The light we see illuminating everyday objects is actually only a very narrow band of wavelengths and frequencies.

The light in these terahertz wavelengths can pass through materials that we normally think of as opaque such as skin plastics clothing and cardboard.

because when light is absorbed by the electrons suspended in the honeycomb lattice of the graphene they do not lose their heat to the lattice

New'T-ray'tech converts light to sound for weapons detection medical imaging More information: Sensitive Room-temperature Terahertz Detection via Photothermoelectric Effect in Graphene Xinghan Cai et al.

"The researchers have demonstrated already that the junction interacts with light much more strongly than the rest of the monolayer,

first light needs a good conductor in order to get converted into usable energy; secondly the cell also has to be transparent for light to get through.

Most solar cells on the market use indium tin oxide with a nonconductive glass protective layer to meet their needs.

and SGM beamlines at the Canadian Light source as well as a Beamline 8. 0. 1 at the Advanced Light source Hunt set out to learn more about how oxide groups attached to the graphene lattice changed it

that could harvest energy from light much more efficiently than traditional thin-film solar cells s

They designed a pixel that can not only measure incident light but also convert the incident light into electric power.

The same photodiode is used also in solar panels to convert incident light to electric power. The photodiode in a camera pixel is used in the photoconductive mode

#Engineers Develop Optical devices That Shape Light in Exotic Ways Engineers from the Jet propulsion laboratory and the California Institute of technology have developed innovative flat,

optical lenses that are capable of manipulating light in ways that are difficult or impossible to achieve with conventional optical devices.

Manipulating the polarization of light is essential for the operation of advanced microscopes, cameras and displays;

or less than a hundredth of the thickness of a human hair. dditionally, the new, flat lenses can be used to modify the shape of light beams at will.

They also looked at an indirect and much less studied effect of UV LIGHT. When the active ingredients of sunscreen absorb UV LIGHT,

a chemical change triggers the generation of oxygen-carrying molecules known as reactive oxygen species (ROS). If a sunscreen agents penetrate the skin,

flexible tube with a light and camera attached to its end passes through a person digestive system.

which is solidified then once exposed to UV LIGHT. This advanced process results in these 3d printed microfish, able to swim naturally through liquids,

and detoxification is monitored easily due to the red light that is emitted on the device when nanoparticles are introduced to the particular toxins.

Now, researchers from MIT and the Federal University of Goias in Brazil have developed a new technique that uses ultraviolet (UV LIGHT to extract man-made pollutants from soil and water.

With the help of nanoparticles and UV LIGHT removal of these toxins could be less expensive and time-consuming than current methods.

and colleagues stumbled upon the idea of using UV LIGHT while they were initially designing photosensitive polymers for drug delivery applications.

Once they came up with a polymer that responded to UV LIGHT, they realized that this did not permeate well through skin

therefore asked ourselves in which infrastructures UV LIGHT was used already, Bertrand told Laboutlook. Knowing that UV radiation is used for removing bacteria from water,

when you shine UV LIGHT on them, the water-loving part is separated from the water-fearing part.

The system uses a beam of light on the floor, according to Georgia Tech. The warmrobots, which are in constant communication with each other,

when someone swipes the Apple ipad to drag the light across the floor, the robots follow.

"In a demonstration of the system, each robot is constantly measuring how much light is in its local eighborhood. hen there too much light in a robot area,

so that another robot can steal some of its light. he robots are working together to make sure that each one has the same amount of light in its own area,

Generally consisting of a flexible tube with a light source and an arrangement of lenses or small cameras in more modern devices the endoscope is a vital,

which individual particles of light are said to have been squeezed'--an achievement which at least one textbook had written off as hopeless September 1st, 201 0

and convert the light into electric current using excited states in the material called"excitons.""Roughly speaking, an exciton is displaced a electron bound together with the hole it left behind.

The instrument combines a specialized form of linearly polarized light and photoluminescence to optically probe the molecular structure of the phthalocyanine crystals."

2015first superconducting graphene created by UBC researchers September 9th, 2015hybrid solar cell converts both light and heat from sun's rays into electricity (video) September 9th,

Understanding motions of thin layers may help design solar cells, electronics and catalysts of the future September 10th, 2015hybrid solar cell converts both light and heat from sun's rays into electricity (video) September 9th,

2015nist physicists show'molecules'made of light may be possible September 10th, 2015ultrafast uncoupled magnetism in atoms:

2015nist physicists show'molecules'made of light may be possible September 10th, 2015slac's ultrafast'electron camera'visualizes ripples in 2-D material:

just as lenses focus light and resonators (like the body of a guitar) amplify sound. They reported their findings in the May 8, 2015,

Due to the light-like properties of graphene electrons, they can pass through unimpededno matter how high the barrierif they hit the barrier head on.

#Controlling swarms of robots with light and a single finger (w/video)( Nanowerk News) Using a smart tablet and a red beam of light,

A person taps the tablet to control where the beam of light appears on a floor. The swarm robots then roll toward the illumination,

When the person swipes the tablet to drag the light across the floor the robots follow.

Using a smart tablet and a red beam of light, Georgia Institute of technology researchers have created a system that allows people to control a fleet of robots with the swipe of a finger.

A person taps the tablet to control where the beam of light appears on a floor. The swarm robots then roll toward the illumination,

When the person swipes the tablet to drag the light across the floor the robots follow.

"In the Georgia Tech demonstration, each robot is constantly measuring how much light is in its local"neighborhood."

so that another can steal some of its light.""The robots are working together to make sure that each one has the same amount of light in its own area,

"said Egerstedt. The tablet-based control system has one final benefit: it was designed with everyone in mind.

or monochromatic light oscillates at all points in space with the same frequency but varying relative delays, or phases.

Manipulating the polarization of light is essential for the operation of advanced microscopes, cameras, and displays;

and phase of light,"says study first author Amir Arbabi, a senior researcher at Caltech."

"We can take any incoming light and shape its phase and polarization profiles arbitrarily and with very high efficiency."

a metasurface device could manipulate light in novel ways that are very hard and sometimes impossible to do using current setups.

when illuminated by a horizontally polarized beam of light, and a different image when illuminated by a vertically polarized beam."

"The two images will appear overlapped under illumination with light polarized at 45 degrees, "Faraon says.

They also looked at an indirect and much less studied effect of UV LIGHT. When the active ingredients of sunscreen absorb UV LIGHT,

a chemical change triggers the generation of oxygen-carrying molecules known as reactive oxygen species (ROS). If a sunscreens agents penetrate the skin,

Using light-generated radiation combined with phase-contrast X-ray tomography, the scientists visualized ultrafine details of a fly measuring just a few millimeters.

Each light pulse generates an X-ray pulse. The X-rays generated have special properties: a wavelength of approximately 0. 1nm,

the team also applied UV LIGHT to disinfect some of the water as it passed through the system.

#New, Ultrathin Optical devices Shape Light in Exotic Ways Researchers have developed innovative flat, optical lenses as part of a collaboration between NASA Jet propulsion laboratory and the California Institute of technology, both in Pasadena, California.

These optical components are capable of manipulating light in ways that are difficult or impossible to achieve with conventional optical devices.

Manipulating the polarization of light is essential for the operation of advanced microscopes, cameras and displays;

or less than a hundredth of the thickness of a human hair. dditionally, the new, flat lenses can be used to modify the shape of light beams at will.

The researchers fabricated the acoustic cell sorter in Penn State Nanofabrication Laboratory using standard lithography techniques. ust like using a lens to focus light,

designed to hold a camera, LED light, an integrated circuit for receiving control instructions and transmitting data, antenna, 1. 5v button battery and, at the rear, the drive unit, to

and mobile phones, Gan has efficient light emission capability, something silicon cannot duplicate. But silicon remains the defacto material of choice semidconductors

When light at a specific wavelength is absorbed by the gas of interest, localized heating of the molecules leads to a temperature

"If the incident light intensity is modulated, then the temperature and pressure will be said as well, "Ren.""This generates an acoustic wave with the same frequency as the light modulation,

using ultraviolet light. The end result is safe drinking water that also tastes good. Earlier this year, Wright team won a grant from the United states Agency for International Development (USAID),

and detecting the difference between how the molecules absorb the light. But the distinguishing effects are weak tiny fractions of a per cent so the technique struggles to approach the sensitivity of the human nose.

#Nanoparticles and UV LIGHT Clean up Environmental Pollutants A new study from MIT shows how nanoparticles can clean up environmental pollutants,

and UV LIGHT can rapchemicals for easy removal from soil and water. Many human-made pollutants in the environment resist degradation through natural processes,

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,

It s a matter of having the right temperature, right moisture levels and not too much light.

The accessories in question range from sensors, to lights, to thermostats, to smart outlets and come from a group of accessory-makers with a trusted reputation in the connected home industry.

This Homekit version lets users control lights in specific areas, as well as check with Siri to see

if lights are either on or off in specific areas of the house you might not be able to see at any given moment.

you can control specific rooms or groups of lights separately, or turn everything off with voice commands.

and germination patterns are influenced by green light and that light frequency also influences the biomass of certain plants as well as their nutritional content.

For example higher levels of red light increases tomato yield and the Vitamin c content of mustard spinach and green onions.

Green light also contributes to the plant growth and development say Singh and co. Exactly how light of various frequencies influences plant growth biomass and nutritional content is understood not well.

Which is why plant scientists all over the world are currently studying this phenomenon in an effort to exploit it in future.

The light is projected through each well and collected by 96 plastic optical fibers. A custom-designed smartphone app then reads the resulting images

After the light is projected through each well, 96 individual plastic optical fibers in the attachment collect a multitude of images.

or manipulate light for telecommunications applications, or design novel catalysts for speeding up a variety of chemical reactions,"Gang said.

Microscopic, hairlike structures, called cilia, on the squid's light organ select and capture the bacteria from a very complex microbial soup of the ocean."

the bioluminescent bacteria allow the squid to produce light, which then allows the squid to escape from things that might want to eat it,

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,

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).

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.

if they are separated by more than half the wavelength of light used for imaging. But Nobel laureates Eric Betzig

By turning the light emitted from the molecules on or off, the scientists could reconstruct the location of the molecules at the nanometer scale.

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