Polyu researchers have developed a simplified method for direct analysis of edible oils using matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). In the new MALDI-MS
in collaboration with Michael Thompson, associate professor of materials science and engineering, got around this issue by using extremely short melt periods induced by a laser.
Writing lines in the film with the laser, the block copolymer decomposed, acting like a positive-tone resist,
#Better memory with faster lasers By studying the effect of femtosecond laser pulses on the types of materials used to make DVDS,
When the laser light interacts with a phase-change material, its atomic structure changes from an ordered crystalline arrangement to a more disordered,
"Today, nanosecond lasers--lasers that pulse light at one-billionth of a second--are used to record information on DVDS and Blu-ray disks,
The speed with which data can be recorded is determined both by the speed of the laser--that is,
Thus, with a nanosecond laser,"the fastest you can record information is one information unit
people have started to use femtosecond lasers, which can potentially record one unit every one millionth of a billionth of a second.
regardless of the laser speeds used.""Even if there is a laser faster than a femtosecond laser,
there will be a limit as to how fast this transition can occur and information can be recorded, just because of the physics of these phase-change materials,
ROM storage, including CDS and DVDS, uses phase-change materials and lasers to store information. Although ROM records
"At the heart of the new technology is a piece of nano-engineered silica glass with ions that fluoresce in infrared light when a low power laser light hits them.
or use a laser. It is capable of working 10 times faster and with more accuracy than a surgeon hands when performing intricate procedures.
#Laser-generated surface structures create extremely water-repellent metals Super-hydrophobic properties could lead to applications in solar panels,
sanitation and as rust-free metals Scientists at the University of Rochester have used lasers to transform metals into extremely water repellent,
Guo and his colleague at the University Institute of Optics, Anatoliy Vorobyev, describe a powerful and precise laser-patterning technique that creates an intricate pattern of micro
This work builds on earlier research by the team in which they used a similar laser-patterning technique that turned metals black.
Guo adds that one of the big advantages of his team process is that he structures created by our laser on the metals are intrinsically part of the material surface.
Unlike Guo laser-treated metals, the Teflon kitchen tools are not super-hydrophobic. The difference is that to make water to roll off a Teflon coated material
Guo team had blasted previously materials with the lasers and turned them hydrophilic, meaning they attract water.
Guo team is now planning on focusing on increasing the speed of patterning the surfaces with the laser,
delivering 10 to 100 times faster 3d imaging speeds than laser scanning confocal, two-photon,
#New laser could upgrade the images in tomorrow#s technology A new semiconductor laser developed at Yale has the potential to significantly improve the imaging quality of the next generation of high-tech microscopes laser projectors photo
Based on a chaotic cavity laser the technology combines the brightness of traditional lasers with the lower image corruption of light emitting diodes (LEDS.
and biomedical engineering and diagnostic radiology. his chaotic cavity laser is a great example of basic research ultimately leading to a potentially important invention for the social goodsaid co-author A. Douglas Stone the Carl A. Morse Professor
and chair of applied physics and professor of physics. ll of the foundational work was motivated primarily by a desire to understand certain classes of lasers random and chaotic with no known applications.
Eventually with input from other disciplines we discovered that these lasers are suited uniquely for a wide class of problems in imaging
when traditional lasers are used. A way to avoid such distortion is by using LED light sources.
The new electrically pumped semiconductor laser offers a different approach. It produces an intense emission
and of physics who is the paper corresponding author. s we showed in the paper the standard edge-emitting laser produced speckle contrast of 50
%while our laser has the speckle contrast of 3%.So our new laser has eliminated completely the issue of coherent artifact for full-field imaging. o-author Michael A. Choma assistant professor of diagnostic radiology pediatrics
Lee and Huang grew the laser semiconductor wafer via molecular beam epitaxy and helped in fabrication and testing.
and performance criteria for the laser provided expertise in spatial coherence and speckle in imaging
and is working with Redding to apply the laser for full-field imaging at Yale School of medicine.
Stone and Cerjan modeled the laser and analyzed its characteristics e
#Tattoo-like sensor can detect glucose levels without a painful finger prick Scientists have developed the first ultra-thin flexible device that sticks to skin like a rub-on tattoo
But the crucial point is that the individual laser pixels work. Scaling it up to a display with many pixels is not a problemsays Jörg Reitterer (Trilite Technologies and Phd-student in the team of Professor Ulrich Schmid at the Vienna University of Technology.
Every single 3d-Pixel (also called rixel consists of lasers and a moveable mirror. he mirror directs the laser beams across the field of vision from left to right.
so that different laser flashes are sent into different directionssays Ulrich Schmid. To experience the 3d effect the viewer must be positioned in a certain distance range from the screen.
#Laser-induced graphene#super#for electronics Rice university scientists advanced their recent development of laser-induced graphene (LIG) by producing
The Rice lab of chemist James Tour discovered last year that firing a laser at an inexpensive polymer burned off other elements and left a film of porous graphene, the much-studied atom-thick
since their work to make vertically aligned supercapacitors with laser-induced graphene on both sides of a polymer sheet.
Research findings are detailed in a cover paper appearing in the Jan 15 issue of Laser & Photonics Reviews.
When exposed to a laser light, the system rises from its round stateto an excited state,
We envisage a new generation of optoelectronic devices to stem from this work, from simple transparent lighting and lasers and to more complex applications.
which is cheap small and easy to use could turn out to be a boost for attosecond science and ultrafast laser research in general s
Pulses of laser light heat the left side of the sample and create an intense current of heat passing through the Co,
and ultrafast heat current created by picosecondne trillionth of a secondulses of laser light, Cahill added. his heat current has the impressively large magnitude of 100 GW per square meter
The lasers and optics are on the right. Image credit: Burrus/NISTTHE technology was designed to track the machinery of biological cells, down to the tiniest bits of DNA, a single ase pairof nucleotides among the 3 billion of these chemical units in human genes.
The method uses two lasers to measure the positions of opposite ends of a molecule,
Crucially, the JILA team verified the stability of the technique by using the two lasers to make two separate, independent measurements of a single sample.
if it is the sample or the lasers moving, Perkins explains. his technology excites me because it opens the door to measuring the tiniest protein motions,
But the scientists, in collaboration with Michael Thompson, associate professor of materials science and engineering, got around this issue by using extremely short melt periods induced by a laser.
Writing lines in the film with the laser, the block copolymer decomposed, acting like a positive-tone resist,
said Hofmann. t a flexible platform that can be used for different technologies. ossible applications for this technique range from atomically perfect buried interconnects to single-electron transistors, high-density memories, light emission, semiconductor lasers,
While lasers can fit this requirement, they are too energy-hungry and unwieldy to integrate into computer chips.
When a laser shines on the surface of a silver cube just 75 nanometers wide,
and off at more than 90 gigahertz. here is great interest in replacing lasers with LEDS for short-distance optical communication,
#Researchers demonstrate the world first white lasers While lasers were invented in 1960 and are used commonly in many applications,
one characteristic of the technology has proven unattainable. No one has been able to create a laser that beams white light.
Researchers at Arizona State university have solved the puzzle. They have proven that semiconductor lasers are capable of emitting over the full visible color spectrum,
which is necessary to produce a white laser. The researchers have created a novel nanosheet a thin layer of semiconductor that measures roughly one-fifth of the thickness of human hair in size with a thickness that is roughly one-thousandth of the thickness of human hair with three
parallel segments each supporting laser action in one of three elementary colors. The device is capable of lasing in any visible color, completely tunable from red, green to blue,
or any color in between. When the total field is collected, a white color emerges. The researchers, engineers in ASU Ira A. Fulton Schools of Engineering, published their findings in the online publication of the journal Nature Nanotechnology.
Cun-Zheng Ning, professor in the School of Electrical, Computer and Energy Engineering, authored the paper, monolithic white laser, with his doctoral students Fan Fan, Sunay Turkdogan, Zhicheng Liu
The technological advance puts lasers one step closer to being a mainstream light source and potential replacement or alternative to light emitting diodes (LEDS.
Lasers are brighter, more energy efficient, and can potentially provide more accurate and vivid colors for displays like computer screens and televisions.
and white laser Li-Fi could be 10 to 100 times faster than LED based Li-Fi currently still under development. he concept of white lasers first seems counterintuitive
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.
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,
those independent lasers cannot be used for room lighting or in displays, Ning said. single tiny piece of semiconductor material emitting laser light in all colors
or in white is desired. Semiconductors, usually a solid chemical element or compound arranged into crystals, are used widely for computer chips or for light generation in telecommunication systems.
and are used to make lasers and LEDS because they can emit light of a specific color
and energy bandgaps. ur goal is to achieve a single semiconductor piece capable of laser operation in the three fundamental lasing colors.
Later on they realized simultaneous laser operation in green and red from a single semiconductor nanosheet or nanowires.
if a single white laser is ever possible. Blue, necessary to produce white, proved to be a greater challenge with its wide energy bandgap
which is required to demonstrate eventual white lasers, said Turkdogan, who is now assistant professor at University of Yalova in Turkey.
and an important breakthrough that finally made it possible to grow a single piece of structure containing three segments of different semiconductors emitting all needed colors and the white lasers possible.
significant obstacles remain to make such white lasers applicable for real-life lighting or display applications.
One of crucial next steps is to achieve the similar white lasers under the drive of a battery.
For the present demonstration, the researchers had to use a laser light to pump electrons to emit light.
and will lay the groundwork for the eventual white lasers under electrical operation
#Scientists create functional liver cells from stem cells Major implications for liver biology and drug discovery The liver plays a critical role in human metabolism.
said that researchers had created the smallest laser possible powered by single electrons that burrow through quantum dots.
but white lasers could serve as a potential alternative light source both in people's homes and in the screens of their electronics.
Lasers are more energy efficient than LEDS, and the ASU researchers claim that their white lasers can cover 70 percent more colors than current standard displays.
The researchers also suggest the technology could be used beyond consumer electronics. They suggest white lasers could be used in Li-Fi
a developing technology that uses multiple colors of light to enable high-speed wireless internet access. Currently, LEDS are being used to develop Li-Fi technology,
and his colleagues argue that Li-Fi using white lasers could be 10 to 100 times faster than LED-based Li-Fi.
White lasers could serve as a potential alternative light sourcefor the past 50 years, lasers have been able to emit every single wavelength of light except for white.
The problem is that typical lasers only beam one specific wavelength of light at a time. To create white
the ASU researchers manufactured three thin semiconductor lasers each as thick as one-thousandth of a human hair
and lined them up parallel to one another. Each semiconductor emits one of the three primary colors
White lasers won't be showing up in our electronics any time soon, however. For this study, the researchers had to pump electrons into the semiconductors with an additional laser light.
The engineers will have to design white lasers to run on battery power before they can be used for commercial applications.
This image shows mixed emission color from the semiconductor lasers in the colors of red green, blue, yellow, cyan, magenta, and white.
ASU/Nature Nanotechnology o
#Google, Samsung, and 16 others receive post-password certification This morning, the plot to kill the password got a little stronger. 18 different companies received an official FIDO certification for 31 different products,
#Researchers Develop Super-Hydrophobic Metal Surfaces Using Lasers Researchers have turned metal surfaces water repellent using femtosecond laser pulses.
said, his is the first time that a multifunctional metal surface is created by lasers that is super-hydrophobic (water repelling),
the laser treated metal surfaces can also absorb heat and light. The potential applications for anti-icing surfaces involve protection of aerofoils, protection of aerofoils, pipes of air conditioners and refrigerators, radar or telecommunication antennas,
titanium and brass to short bursts of lasers. These short burst lasted for only millionth of a billionth of a second.
The nanostructures created by the lasers are intrinsic to the metal surface. According to the researchers, properties they provide to the metal will not deteriorate.
The super-hydrophobic properties of the laser-patterned metals are similar to the famous nonstick coating.
#Princeton Researchers Develop Rice Sized Laser Princeton university researchers have built a rice sized laser powered by single electrons tunneling through artificial atoms known as quantum dots.
#Researchers Develop Rice-Sized Laser That Can Boost Quantum computing Researchers have developed a microwave laser or maser,
Princeton university researchers developed a laser the size of a grain of rice, while investigating the use of semiconductor material fragments as components for quantum computing.
and not lasers. Quantum dots act like single atoms, as components for quantum computers. The maser is a tiny,
rice grain sized laser that is powered by a single electron from the artificial atoms called quantum dots.
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