While there's a healthy selection of compact solar panels to keep our mobile gadgets charged up light permitting the vast majority of these are either too small to be effective or too bulky for carting around.
but they throw a lot of light.""Ford revealed the Mode: Link app with the original two Mode e-bikes back in March
#Quantum dots and perovskite combined to create new hyper-efficient light-emitting crystal Two optoelectronic materials getting a lot of press these days are perovskite and quantum dots.
whose light production depends on the perovskite matrix's ability to guide electrons into the quantum dots, which then super-efficiently convert electricity to light.
This, then, leverages the superior photocarrier diffusion of the perovskite to produce bright light emission. Producing light at the near-infrared,
and cellular-scale inorganic light-emitting diode(-ILED) arrays, allowing it to shine light on targeted cells.
If we want to influence an animal behavior with light or with a particular drug, we can simply point the remote at the animal and press a button."
Some of that light is absorbed by glucose in the bloodstream, and some is reflected back down onto the window.
when exposed to that reflected light the more light that hits them, the longer they glow. By measuring the duration of that fluorescence,
The car's camera system is also able to directly spotlight hazards with two special LED lamps positioned next to the fog lights.
These are created by exposure to visible light a process that boosts both their strength and stickiness.
and exposed them to blue visible light, the photochemical reaction saw them instantly pair up to form these tyrosine intersections.
the patient will perceive patterns of light, which they can learn to interpret, thus regaining some degree of sight.
a foam is made by bubbling a gas through molten metal to form a light froth that cools into a lightweight matrix.
Unfortunately, these methods tend to impede the passage of visible light, some by tinting panes and others by complete obscuration.
Two years ago, Delia Milliron and her team produced a"smart"glass coating that could block visible light, near-infrared light (NIR), or both.
The team's advancements on their previous research have led to the creation of electrochromic materials that can selectively permit the passage of light,
These new materials allows control of up to 90 percent of NIR and 80 percent of visible light.
This design provides channels for electronic and ionic change, thereby enabling selective blocking of light and/or NIR through different applied voltages.
and Korea Research Institute of Standards and Science (KRISS) that have demonstrated for the first time ever an on-chip visible light source using graphene, an atomically thin and perfectly crystalline form of carbon,
The study, right visible light emission from graphene is published in the Advance Online Publication on Nature Nanotechnology website on June 15. ee created
Creating light in small structures on the surface of a chip is crucial for developing fully integrated hotoniccircuits that do with light
but have not yet been able to put the oldest and simplest artificial light sourcehe incandescent light bulbnto a chip.
By measuring the spectrum of the light emitted from the graphene, the team was able to show that the graphene was reaching temperatures of above 2500 degrees Celsius,
hot enough to glow brightly. he visible light from atomically thin graphene is so intense that it is visible even to the naked eye,
Interestingly, the spectrum of the emitted light showed peaks at specific wavelengths, which the team discovered was due to interference between the light emitted directly from the graphene
and light reflecting off the silicon substrate and passing back through the graphene. Kim notes, his is only possible
because graphene is transparent, unlike any conventional filament, and allows us to tune the emission spectrum by changing the distance to the substrate.
so that less energy is needed to attain temperatures needed for visible light emission, Myung-Ho Bae, a senior researcher at KRISS and co-lead author,
when he invented the incandescent light bulb: dison originally used carbon as a filament for his light bulb and here we are going back to the same element,
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
which is invisible to the naked eye that you need to put an ultraviolet light on,
*Carbon fibre bicycle frames are popular with cyclists as they are so light, but they are also liable to crack.
The light is projected through each well and collected by 96 plastic optical fibers. A custom-designed smartphone app then reads the resulting images
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,
The state of skin is analyzed by applying LED LIGHTS with different wavelengths (such as visible light which is reflected on skin surface,
and near-infrared light, which comes back after passing through the inside of the skin) to skin
and measuring reflected lights with the CMOS sensor. Based on multiple image data that indicate the states of the surface and inside of the skin,
When the householder turns on a light, explains Rogers, the energy-making process will be activated immediately in the fuel cell stack.
because they give up some to the chemical bonds in the dye that coats the gold stars changing the way the dye looks under the laser light. 10 Technologies That Will Transform Your Life Ordinarily it would be difficult to see the change in the light
#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
#Steam Machine Turns Poop into Clean drinking water Bill gates wants to turn your poop into clean drinking water, and he's got just the machine to do it.
Researchers have developed a light-emitting graphene transistor that works in the same way as the filament in a light bulb."
and temperature incandescent filaments must get extremely hot before they can produce visible light. This new graphene device,
the researchers said. 8 Chemical elements You've Never Heard Of Making light When electric current is passed through an incandescent light bulb's filament usually made of tungsten the filament heats up and glows.
Electrons moving through the material knock against electrons in the filament's atoms, giving them energy.
As for why this is the first time light has been made from graphene, study co-leader Yun Daniel Park,
"The light emitted from the graphene also reflected off the silicon that each piece was suspended in front of.
The reflected light interferes with the emitted light, producing a pattern of emission with peaks at different wavelengths.
tuning the light by varying the distance to the silicon. The principle of the graphene is said simple,
or other therapies safely to sites of disease are already seeing the light of day.
so that light can be delivered correctly. The hope is that this new application of optogenetics to voluntary muscles will help in medical research
Largest tetanic contractions are observed with 5-ms light pulses at 30z, resulting in 84%of the maximal force induced by electrical stimulation.
Three expert and four novice endoscopists performed white light endoscopy followed by LCE and HRME. All optical images were compared to gold standard of histopathology.
#Gastrisail Lights Up Stomach from Within for Accurate Sleeve Gastrectomy Procedures Medtronic just released in the U s. the Gastrisail gastric positioning system for sleeve gastrectomy procedures.
Having identified how brain cancer cells uniquely scatter light, the researchers wrote a computer program that spots the relevant parameters within OCT scan data.
but now it may finally see clinical light of day. The company has partnered now with Teva Pharmaceutical to produce the initial product and put it through clinical trials.
and then activating them using a light source. The drug delivery component is particularly interesting for clinical research,
The device reacts to infrared light to open up its drug chambers. Since such frequencies of light are able to penetrate a patient skull
the infrared light source can be used as a simple remote control to open up the drug chambers as necessary s
#Wize Mirror to Monitor Health, Prevent Cardio-Metabolic Diseases Seasoned primary care physicians often have an uncanny ability to notice symptoms by simply looking at their patients.
clean water and light,"said Aisa Mijeno, cofounder and CEO of SALT Corp. Related on MNN N
The Utah engineers have developed an ultracompact beamsplitter the smallest on record for dividing light waves into two separate channels of information.
and shuttle data with light instead of electrons. Electrical and computer engineering associate professor Rajesh Menon and colleagues describe their invention today in the journal Nature Photonics.
the photons of light must be converted to electrons before a router or computer can handle the information.
if the data stream remained as light within computer processors. ith all light, computing can eventually be millions of times faster,
(which looks somewhat like a barcode) on top of a silicon chip that can split guided incoming light into its two components.
or shuttled is done through light instead of electrons. Photo credit: Dan Hixson/University of Utah College of Engineering Source:
When these spirals are shrunk to sizes smaller than the wavelength of visible light, they develop unusual optical properties.
For example, when they are illuminated with infrared laser light, they emit visible blue light. A number of crystals produce this effect, called frequency doubling or harmonic generation, to various degrees.
The strongest frequency doubler previously known is the synthetic crystal beta barium borate, but the nano-spirals produce four times more blue light per unit volume.
When infrared laser light strikes the tiny spirals it is absorbed by electrons in the gold arms.
so that some of them emit blue light at double the frequency of the incoming infrared light. his is similar to
The blue light is exactly an octave higher than the infrared the second harmonic. he nano-spirals also have a distinctive response to polarized laser light.
Linearly polarized light, like that produced by a Polaroid filter, vibrates in a single plane.
When struck by such a light beam, the amount of blue light the nano-spirals emit varies as the angle of the plane of polarization is rotated through 360 degrees.
The effect is even more dramatic when circularly polarized laser light is used. In circularly polarized light the polarization plane rotates either clockwise or counterclockwise.
When left-handed nano-spirals are illuminated with clockwise polarized light, the amount of blue light produced is maximized
because the polarization pushes the electrons toward the center of the spiral. Counterclockwise polarized light,
on the other hand, produces a minimal amount of blue light because the polarization tends to push the electrons outward
so that the waves from all around the nano-spiral interfere destructively. The combination of the unique characteristics of their frequency doubling and response to polarized light provide the nano-spirals with a unique
and Korea Research Institute of Standards and Science (KRISS) reported today that they have demonstrated-for the first time-an on-chip visible light source using graphene, an atomically thin and perfectly crystalline form of carbon,
right Visible light Emission from Graphene, is published in the Advance Online Publication (AOP) on Nature Nanotechnology's website on June 15."
"This new type of'broadband'light emitter can be integrated into chips and will pave the way towards the realization of atomically thin, flexible,
"Creating light in small structures on the surface of a chip is crucial for developing fully integrated'photonic'circuits that do with light
but have not yet been able to put the oldest and simplest artificial light sourcehe incandescent light bulbnto a chip.
By measuring the spectrum of the light emitted from the graphene, the team was able to show that the graphene was reaching temperatures of above 2500 degrees Celsius,
hot enough to glow brightly. he visible light from atomically thin graphene is so intense that it is visible even to the naked eye,
Interestingly, the spectrum of the emitted light showed peaks at specific wavelengths, which the team discovered was due to interference between the light emitted directly from the graphene
and light reflecting off the silicon substrate and passing back through the graphene. Kim notes
his is only possible because graphene is transparent, unlike any conventional filament, and allows us to tune the emission spectrum by changing the distance to the substrate. he ability of graphene to achieve such high temperatures without melting the substrate
so that less energy is needed to attain temperatures needed for visible light emission, Myung-Ho Bae, a senior researcher at KRISS and co-lead author,
when he invented the incandescent light bulb: dison originally used carbon as a filament for his light bulb and here we are going back to the same element,
because they fit into the long wavelength-infrared light range and deliver properties that any other currently existing 2d materials cannot,
They conducted x-ray studies at the National Synchrotron Light source (NSLS) and electron microscopy at the Center for Functional Nanomaterials (CFN), both DOE Office of Science User Facilities."
but its successor-the just-opened National Synchrotron Light source II (NSLS-II)- is 10,000 times brighter
along with an international team, have come up with an ingenious way of creating therapeutic heat in a light, flexible design.
It is possible for something to move faster than the phase velocity of light in a medium
wakes produced as electrical charges travel through liquids faster than the phase velocity of light, emitting a glowing blue wake.
For the first time, Harvard researchers have created similar wakes of light-like waves moving on a metallic surface, called surface plasmons,
and harness the power of light on the nanoscale.""The creation and control of surface plasmon wakes could lead to new types of plasmonic couplers
The team discovered that the angle of incidence of the light shining onto the metamaterial provides an additional measure of control
and using polarized light can even reverse the direction of the wake relative to the running waveike a wake traveling in the opposite direction of a boat."
and manipulate light at scales much smaller than the wavelength of the light is said very difficult
such as highly Efficient light Emitting Diodes (LEDS), lasers and radio frequency components for cooling purposes. Graphene-based film could also pave the way for faster, smaller, more energy efficient, sustainable high power electronics."
and shine lights on neurons deep inside the brains of mice. The revolutionary device is described online in the journal Cell.
and delivering lights through fiber optic cables. Both options require surgery that can damage parts of the brain
and can simultaneously deliver drugs and lights.""We used powerful nanomanufacturing strategies to fabricate an implant that lets us penetrate deep inside the brain with minimal damage,
Scientists used soft materials to create a brain implant a tenth the width of a human hair that can wirelessly control neurons with lights and drugs.
But first engineers must build a light source that can be turned on and off that rapidly.
Duke university researchers are now one step closer to such a light source. In a new study, a team from the Pratt School of engineering pushed semiconductor quantum dots to emit light at more than 90 billion gigahertz.
These oscillations create their own light, which reacts again with the free electrons. Energy trapped on the surface of the nanocube in this fashion is called a plasmon.
But first engineers must build a light source that can be turned on and off that rapidly.
Duke university researchers are now one step closer to such a light source. In a new study, a team from the Pratt School of engineering pushed semiconductor quantum dots to emit light at more than 90 billion gigahertz.
These oscillations create their own light, which reacts again with the free electrons. Energy trapped on the surface of the nanocube in this fashion is called a plasmon.
#Reshaping the solar spectrum to turn light to electricity Researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient.
In lab experiments, the researchers directed 980-nanometer infrared light at the hybrid material, which then generated upconverted orange yellow fluorescent 550-nanometer light,
almost doubling the energy of the incoming photons. The researchers were able to boost the upconversion process by up to three orders of magnitude by coating the cadmium selenide nanocrystals with organic ligands,
providing a route to higher efficiencies. his 550-nanometer light can be absorbed by any solar cell material,
Put simply, the inorganics in the composite material take light in; the organics get light out. esides solar energy,
#Reshaping the solar spectrum to turn light to electricity Researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient.
In lab experiments, the researchers directed 980-nanometer infrared light at the hybrid material, which then generated upconverted orange yellow fluorescent 550-nanometer light,
almost doubling the energy of the incoming photons. The researchers were able to boost the upconversion process by up to three orders of magnitude by coating the cadmium selenide nanocrystals with organic ligands,
providing a route to higher efficiencies. his 550-nanometer light can be absorbed by any solar cell material,
Put simply, the inorganics in the composite material take light in; the organics get light out. esides solar energy,
The technological advance puts lasers one step closer to being a mainstream light source and potential replacement or alternative to light emitting diodes (LEDS.
Another important application could be in the future of visible light communication in which the same room lighting systems could be used for both illumination and communication.
The technology under development is called Li-Fi for light-based wireless communication, as opposed to the more prevailing Wi-fi,
because the light from a typical laser contains exactly one color, a specific wavelength of the electromagnetic spectrum, rather than a broad-range of different wavelengths.
White light is viewed typically as a complete mixture of all of the wavelengths of the visible spectrum, said Ning,
a blue LED is coated with phosphor materials to convert a portion of the blue light to green, yellow and red light.
This mixture of colored light will be perceived by humans as white light and can therefore be used for general illumination.
Sandia National Labs in 2011 produced high-quality white light from four separate large lasers. The researchers showed that the human eye is as comfortable with white light generated by diode lasers as with that produced by LEDS,
inspiring others to advance the technology. hile this pioneering proof-of-concept demonstration is impressive,
The most preferred light emitting material for semiconductors is indium gallium nitride though other materials such as cadmium sulfide and cadmium selenide also are used for emitting visible colors.
The direct gap semiconductor show a significantly enhanced PL emission due to the efficient absorption of light in direct gap materials
which is important for calculating the amount of energy a single particle of light, or photon, Boyd wondered
2015new nanowire structure absorbs light efficiently: Dual-type nanowire arrays can be used in applications such as LEDS and solar cells February 25th, 2015qd Vision Named Edison Award Finalist for Innovative Color IQ Quantum dot Technology
which means they emit light of a particular wavelength in response to incoming light of a different wavelength.
The lab found quantum dots that emit blue light were easiest to produce from bituminous coal. The researchers suggested their quantum dots may also enhance sensing, electronic and photovoltaic applications.
Videos/Movies Light as puppeteer: Controlling particles with light and microfibers March 18th, 2015imperfect graphene opens door to better fuel cells:
Membrane could lead to fast-charging batteries for transportation March 18th, 2015news and information 30 years after C60:
Now, a new JQI study has shown how to sharpen nanoscale microscopy (nanoscopy) even more by better locating the exact position of the light source.
Diffraction limittraditional microscopy is limited by the diffraction of light around objects. That is when a light wave from the source strikes the object, the wave will scatter somewhat.
This scattering limits the spatial resolution of a conventional microscope to no better than about one-half the wavelength of the light being used.
For visible light, diffraction limits the resolution to no be better than a few hundred nanometers. How then, can microscopy using visible light attain a resolution down to several nanometers?
By using tiny light sources that are no larger than a few nanometers in diameter. Examples of these types of light sources are fluorescent molecules, nanoparticles, and quantum dots.
The JQI work uses quantum dots which are tiny crystals of a semiconductor material that can emit single photons of light.
If such tiny light sources are close enough to the object meant to be mapped or imaged, nanometer scale features can be resolved.
This type of microscopy, called"Super-resolution imaging,"surmounts the standard diffraction limit. Image-dipole distortionsjqi fellow Edo Waks and his colleagues have performed nanoscopic mappings of the electromagnetic field profile around silver nanowires by positioning quantum dots (the emitter) nearby.
Since the measured light from the dot is the substance of the imaging process, the presence of light coming from the"image dipole"can interfere with light coming directly from the dot.
This distorts the perceived position of the dot by an amount which is 10 times higher than the expected spatial accuracy of the imaging technique
2015new nanowire structure absorbs light efficiently: Dual-type nanowire arrays can be used in applications such as LEDS and solar cells February 25th,
Controlling particles with light and microfibers March 18th, 2015nano piano's lullaby could mean storage breakthrough March 16th, 201 2
By precisely etching tiny features--smaller than a wavelength of light--onto a silicon film one thousand times thinner than a human hair, the researchers were able to select the range of colors the material would reflect,
Controlling light with structures rather than traditional optics is not new. In astronomy, for example, evenly spaced slits known as diffraction gratings are used routinely to direct light
Rather than spreading the light into a complete rainbow, however, these ridges--or bars--reflect a very specific wavelength of light.
and readily reflected the frequency of light they were tuned to. Flexibility Is the Key to Controlsince the spacing
spaced so they can interact with a specific wavelength of light, you can change its properties
and how it interacts with light by changing its dimensions, "said Chang-Hasnain. Earlier efforts to develop a flexible,
reflecting only a portion of the light they received. Other surfaces were too thick, limiting their applications,
and reflect light with even greater efficiency. Chameleon Skin with Multiple Applicationsfor this demonstration, the researchers created a one-centimeter square layer of color-shifting silicon.
OSA is a founding partner of the National Photonics Initiative and the 2015 International Year of Light.
2015new nanowire structure absorbs light efficiently: Dual-type nanowire arrays can be used in applications such as LEDS and solar cells February 25th, 2015qd Vision Named Edison Award Finalist for Innovative Color IQ Quantum dot Technology February 23rd,
Study sheds light on why foreign STEM students stay in US or return home March 11th, 2015announcements Super-resolution microscopes reveal the link between genome packaging and cell pluripotency:
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