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- Monolithic integration of light-emitting diodes and power metal-oxide-semiconductor channel high-electron-mobility transistors for light-emitting power integrated circuits in GaN on sapphire substrate
- “Silicon millefeuille”: From a silicon wafer to multiple thin crystalline films in a single step
Monolithic integration of light-emitting diodes and power metal-oxide-semiconductor channel high-electron-mobility transistors for light-emitting power integrated circuits in GaN on sapphire substrate
Z. Li, J. Waldron, T. Detchprohm, C. Wetzel, R. F. Karlicek, Jr., and T. P. Chow
Appl. Phys. Lett. 102, 192107 (2013) | HTML | PDF
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LED manufacturing research: RPI integrates features, studies address cost and efficiency
LEDs Magazine | 06/13/13 16:14
New RPI research proves the concept of integrating LED emitters on the same chip with other electronic components such as transistors, while other new research focuses on maximizing the light extraction efficiency of LEDs and lowering cost through simpler materials.
“Silicon millefeuille”: From a silicon wafer to multiple thin crystalline films in a single step
David Hernández, Trifon Trifonov, Moisés Garín, and Ramon Alcubilla
Appl. Phys. Lett. 102, 172102 (2013) | HTML | PDF
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Producing Cheaper and More Flexible Multiple Thin Crystalline Silicon Wafers
Science Daily | 06/11/13 22:48
A team of researchers from the Nanoengineering Research Centre (CRNE) and the Department of Electronic Engineering at the Universitat Politecnica de Catalunya * BarcelonaTech (UPC) has found a way to make the manufacture of crystalline silicon materials faster and more affordable.
Taking whispering gallery-mode single virus detection and sizing to the limit
V. R. Dantham, S. Holler, V. Kolchenko, Z. Wan, and S. Arnold
Appl. Phys. Lett. 101, 043704 (2012) | HTML | PDF
Influential Whispering
By Tom Stoelker
Fordham University | 05/28/13 12:39
Physicist Stephen Holler brings startup know-how to his Fordham lab, where he researches sensor technology. Holler expects further breakthroughs, including a method of detecting protein that appears concurrent with certain cancers. Because of the sphere’s hypersensitivity, his hope is that it will be able to detect cancers earlier than current methods can.
Tuning magnetic anisotropy in (001) oriented L10 (Fe1−xCux)55Pt45 films
Dustin A. Gilbert, Liang-Wei Wang, Timothy J. Klemmer, Jan-Ulrich Thiele, Chih-Huang Lai, and Kai Liu
Appl. Phys. Lett. 102, 132406 (2013) | HTML | PDF
Iron-platinum Alloys Could Be New-generation Hard Drives
By University of California – Davis
Daily Democrat (AP) | 05/23/13 20:30
Science Newsline | 05/20/13 16:42
Science Daily | 05/19/13 19:10
Meeting the demand for more data storage in smaller volumes means using materials made up of ever-smaller magnets, or nanomagnets. One promising material for a potential new generation of recording media is an alloy of iron and platinum with an ordered crystal structure. Researchers led by Professor Kai Liu and graduate student Dustin Gilbert at the University of California, Davis, have now found a convenient way to make these alloys and tailor their properties.
Revisiting the “In-clustering” question in InGaN through the use of aberration-corrected electron microscopy below the knock-on threshold
Kamal H. Baloch, Aaron C. Johnston-Peck, Kim Kisslinger, Eric A. Stach, and Silvija Gradečak
Appl. Phys. Lett. 102, 191910 (2013) | HTML | PDF
Solving a semiconductor riddle
Massachusetts Institute of Technology | 05/24/13 00:08
New observations of material disprove leading theory about LED brightness, opening new avenues for research.
Atomic-Scale Investigations Solve Key Puzzle of LED Efficiency
Newswise | 05/23/13 12:00
From the high-resolution glow of flat screen televisions to light bulbs that last for years, light-emitting diodes (LEDs) continue to transform technology. The celebrated efficiency and versatility of LEDs—and other solid-state technologies including laser diodes and solar photovoltaics—make them increasingly popular.
Patterned optical anisotropy in woven conjugated polymer systems
C. Müller, M. Garriga, and M. Campoy-Quiles
Appl. Phys. Lett. 101, 171907 (2012) | HTML
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New Invisible Thread May Be Able to Protect From Fashion Piracy
EmailWire.com | 05/11/13 03:26
MyPRGenie | 05/10/13 02:45
Fashion designers across the world are hoping that a new tool to fight against pirated knock-off garments is in the pipeline toward being a standard item. The new item is an "invisible thread" that was developed by Swedish researchers to help with such problems.
Inbuilt piracy protection for Big Red?
Investor Village | 05/07/13 19:14
There is now a way to differentiate between designer clothing and knockoffs. Chalmers researcher Christian Müller has produced a thread with unique optical properties, which can be used to create invisible patterns in fabrics that are only visible under polarized light.
Optical Thread Thwarts Designer Knockoffs
Photonics.com | 05/07/13 00:00
A thread with optical properties can be used to create invisible patterns in fabric and is seen as a potential way to differentiate designer clothing from knockoffs.
Controllable light filters using an all-solid-state switchable mirror with a Mg-Ir thin film for preterm infant incubators
Kazuki Tajima, Mika Shimoike, Heng Li, Masumi Inagaki, Hitomi Izumi, Misaki Akiyama, Yukiko Matsushima, and Hidenobu Ohta
Appl. Phys. Lett. 102, 161913 (2013) | HTML
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Protecting Preterm Infants From Disturbing Light, Applied Physics Letters Reveals
Device Space | 05/09/13 10:13
Solid-state controllable light filter may protect preterm infants from disturbing light
The American Ceramic Society | 05/07/13 16:48
Preterm infants appear to mature better if they are shielded from most wavelengths of visible light, from violet to orange. But it has been a challenge to develop a controllable light filter for preterm incubators that can switch between blocking out all light—for sleeping—and all but red light to allow medical staff and parents to check up on the kids when they’re awake.
Atomic force microscopy-coupled microcoils for cellular-scale nuclear magnetic resonance spectroscopy
Charilaos Mousoulis, Teimour Maleki, Babak Ziaie, and Corey P. Neu
Appl. Phys. Lett. 102, 143702 (2013) | HTML
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New imaging technology could reveal cellular secrets
KurzweilAI.net | 04/29/13 05:19
What causes a cell to metastasize into a cancerous tumor? To find out, Corey Neu, an assistant professor in Purdue University‘s Weldon School of Biomedical Engineering, and colleagues have combined an atomic force microscope (AFM) and a nuclear magnetic resonance system.
Nuevo microscopio de fuerza atómica con resonancia magnética nuclear ofrece una nueva vista del interior de las células
Medgadget Blog | 04/26/13 02:08
Near-field infrared absorption of plasmonic semiconductor microparticles studied using atomic force microscope infrared spectroscopy
Jonathan R. Felts, Stephanie Law, Christopher M. Roberts, Viktor Podolskiy, Daniel M. Wasserman, and William P. King
Appl. Phys. Lett. 102, 152110 (2013) | HTML
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Researchers measure near-field behavior of semiconductor plasmonic microparticles
Solid State Technology | 05/01/13 20:30
University of Illinois researchers measure near-field behavior of semiconductor plasmonic microparticles: Nanometer-scale heating reveals surface plasmon resonance
Nanotechnology Now | 04/22/13 16:17
By William P. King wpk@illinois.edu 217-244-3864
U. of Illinois researchers measure near-field behavior of semiconductor plasmonic microparticles
Bloggero Science News | 04/22/13 20:00
Recent progress in the engineering of plasmonic structures has enabled new kinds of nanometer-scale optoelectronic devices as well as high-resolution optical sensing. But until now, there has been a lack of tools for measuring nanometer-scale behavior in plasmonic structures which are needed to understand device performance and to confirm theoretical models.
Shallow acceptor complexes in p-type ZnO
J. G. Reynolds, C.L. Reynolds, Jr., A. Mohanta, J.F. Muth, J.E. Rowe, H.O. Everitt and D. E. Aspnes
Appl. Phys. Lett. 102, 152114 (2013) | HTML
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New Research Findings Open Door to Zinc-oxide-based UV lasers, LED Devices
NC State Universtiy Newsroom
Matt Shipman | News Services | 919.515.6386
Dr. Lewis Reynolds | 919.515.7622
Researchers from North Carolina State University have solved a long-standing materials science problem, making it possible to create new semiconductor devices using zinc oxide (ZnO) – including efficient ultraviolet (UV) lasers and LED devices for use in sensors and drinking water treatment, as well as new ferromagnetic devices.
“The challenge of using ZnO to make these devices has stumped researchers for a long time, and we’ve developed a solution that uses some very common elements: nitrogen, hydrogen and oxygen,” says Dr. Lew Reynolds, co-author of a paper describing the research and a teaching associate professor of materials science and engineering at NC State. “We’ve shown that it can be done, and how it can be done – and that opens the door to a suite of new UV laser and LED technologies,” says Dr. Judith Reynolds, a research scientist at NC State and lead author of the paper.
To make laser and LED technologies, you need both “n-type” materials and “p-type” materials. N-type materials contain an abundance of free electrons. P-type materials have “holes” that attract those free electrons. But the holes in the p-type materials have a lower energy state, which means that electrons release their excess energy in the form of light as they travel from the n-type material to the p-type material. The shedding of excess energy at the so-called “p-n junction” is what produces light in lasers and LED devices. Researchers have been interested in using ZnO to create these devices because ZnO produces UV light, and because ZnO can be used to make devices with relatively fewer unwanted defects than other UV emitters– which means the resulting lasers or LEDs would be more energy efficient.
However, researchers had been unable to consistently produce stable p-type materials out of ZnO. Now researchers have solved that problem by introducing a specific “defect complex,” via a unique set of growth and annealing procedures, in the ZnO. The defect complex looks different from a normal ZnO molecule. The zinc atom is missing and a nitrogen atom (attached to a hydrogen atom) substitutes for the oxygen atom. These defect complexes are dispersed throughout the ZnO material and serve as the “holes” that accept the electrons in p-type materials.
Not only does the research illustrate how to create p-type materials from ZnO, but the defect complex allows the ZnO p-n junction to function efficiently – and produce UV light – at room temperature.
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Solid State Technology | 04/23/13 00:06
Red Orbit | 04/23/13 15:57
Space Daily | 04/28/13 07:52
Generation of high-quality mega-electron volt proton beams with intense-laser-driven nanotube accelerator
M. Murakami and M. Tanaka
Appl. Phys. Lett. 102, 163101 (2013) | HTML
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Successful generation of high-quality proton beam with CNT particle accelerator
Osaka University | Tuesday, 9 April 2013
Under the leadership of MURAKAMI Masakatsu, Professor, Institute of Laser Engineering, Osaka University, and TANAKA Motohiko, Professor, School of Engineering, Chubu University, a group of researchers discovered a new particle acceleration mechanism in which, when a strong laser irradiated to nanotubes filled with hydrogen compound, hydrogen ions, protons with high coherence and directionality, were ejected from both ends of nanotubes. Detailed three-dimensional numerical simulations demonstrated that acceleration principle of nanotubes produced proton beam with high monochromaticity and directionality.
Research into proton beams will lead to the possible development of super compact particle cancer therapy equipment, the development of compact neutron source mediated by fusion reaction as well as applications in fuel batteries and materials to industry.
Carbon nanotubes have unique electrical and mechanical features. Therefore, a variety of basic research and industrial applications as electronic devices and functional materials have been promoted since their discovery. This group's discovery clarified that femto scale (1-100 trillionths seconds) carbon nanotubes can be used as particle accelerators under the extreme physical environment of hundreds of millions of degrees. It will also give birth to new interdisciplinary fields of study such as high energy physics, high power laser technology, and nano materials.
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水素イオン:イオンビーム、がん治療に光 阪大チーム発見、カーボンナノチューブ使い
Mainichi Shinbun news | 毎日新聞 2013年04月16日 大阪朝刊
Macroscale refrigeration by nanoscale electron transport
Peter J. Lowell, Galen C. O'Neil, Jason M. Underwood, and Joel N. Ullom
Appl. Phys. Lett. 102, 082601 (2013) | HTML As featured in: Quantum refrigerator cools to extreme temps
EDN (Blog) | 04/07/13 18:36
A prototype solid-state refrigerator developed by researchers at the National Institute of Standards and Technology (NIST) uses quantum physics to cool a much larger object to extremely low temperatures. Measuring a few inches in outside dimensions, its cooling power is said to be equivalent to that of a window-mounted air conditioner cooling a building the size of the Lincoln Memorial in Washington, DC.
Dexterous manipulation of microparticles using Bessel-function acoustic pressure fields
Charles R. P. Courtney, Bruce W. Drinkwater, Christine E. M. Demore, Sandy Cochran, Alon Grinenko, and Paul D. Wilcox
Appl. Phys. Lett. 102, 123508 (2013) | HTML | PDF
Sonic lasso catches cells
University of Bristol | 04/03/2013 02:10
Academics have demonstrated for the first time that a “sonic lasso” can be used to grip microscopic objects, such as cells, and move them about.
The research by academics at the University of Bristol’s Department of Mechanical Engineering and the University of Dundee's Institute for Medical Science and Technology is published online in Applied Physics Letters.
The researchers have shown experimentally how tiny particles, such as cells, or any small objects can be trapped by a spinning ultrasonic, or sonic, vortex. The vortex acts as a lasso that can be controlled and moved, catching the microscopic particles and enabling their careful positioning.
This new technology makes possible applications such as assembly human tissue from a collection of cells and assembling nano materials.
Bruce Drinkwater, Professor of Ultrasonics in the Department of Mechanical Engineering and who led the study, said: “Our research has shown we can grip and move particles pretty much anywhere and along any path. The impressive thing is that it is completely non-contact, harmless and so ideal for moving delicate things, such as cells, around under a microscope. With further development this could be used to assemble human tissue as part of a tissue engineering production line.”
The paper explains that acoustic vortices, first order Bessel-functions in this case, can be used to trap and controllably position microparticles. Like a rope lasso, the waves carry linear and rotational momentum and so can cause the objects to spin as well as move. A circular device, made up of 16 ultrasound sources, generates and manipulates an acoustic field within a chamber, trapping microparticles and clusters of microparticles. Changes in the phase of the sinusoidal signals applied to the sources result in the movement of the Bessel-function pressure field and therefore the microparticles.
This research has been funded by the Engineering and Physical Sciences Research Council (EPSRC) through the Electronic Sonotweezers programme.
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Scientists Use Sonic Lasso to Ensnare Microscopic Objects
GeekoSystem | 04/04/13 04:45
by Jeff LaSala
Vortices of any kind are cool, especially when they’re small and harmless, as opposed to huge and deadly, à la tornadoes.
Sonic lasso catches cells and assembles nanomaterials
Nanowerk | 04/03/13 07:01
Sonic lasso catches cells
Phys.Org | 04/03/13 06:31
Sonic lasso catches cells (University of Bristol)
World News | 04/03/13 02:45
Researchers wrangle microscopic particles with sonic lasso
Engadget | Apr 3rd, 2013 at 4:18 PM
By Terrence O'Brien
Academics have demonstrated for the first time that a “sonic lasso” can be used to grip microscopic objects, such as cells, and move them about.
Highly efficient charge transfer in nanocrystalline Si:H solar cells
K. G. Kiriluk, J. D. Fields, B. J. Simonds, Y. P. Pai, P. L. Miller, T. Su, B. Yan, J. Yang, S. Guha, A. Madan, S. E. Shaheen, P. C. Taylor, and R. T. Collins
Appl. Phys. Lett. 102, 133101 (2013) | HTML | PDF
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Mines solar cell research cited in Applied Physics Letters
Colorado Cleantech | 04/01/13 17:26
Standard solar cells have efficiency limitations because electricity carriers excited by sunlight quickly lose some of their energy to heat. This energy loss can be prevented by collecting electricity carriers before they convert to heat through tiny "dots" of material.
An artificial muscle computer
Benjamin Marc O'Brien and Iain Alexander Anderson
Appl. Phys. Lett. 102, 104102 (2013) | HTML | PDF
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Artificial muscle computer performs as a universal Turing machine
Phys.org | March 28, 2013 by Lisa Zyga
Turing machine built from artificial muscles may lead to smart prosthetics
NewsTech24 | 03/29/13 02:39
By Jon Fingas
In the hierarchy of computing hardware, artificial muscle doesn't really even register: it's usually a target for action, not the perpetrator. The University of Auckland has figured out a way to let those muscles play a more active role.
Macroscale refrigeration by nanoscale electron transport
Peter J. Lowell, Galen C. O'Neil, Jason M. Underwood, and Joel N. Ullom
Appl. Phys. Lett. 102, 082601 (2013) | HTML | PDF
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[应用物理快报]：科学家研发出新型固态量子冰箱
生物秀 news.bbioo.com | 03/28/13 22:50
导读：据物理学家组织网近日报道，美国国家标准与技术研究院的研究人员展示了他们最新研制的一款固态量子冰箱，这款制冷机利用了微型和纳米结构的量子物理学原理，可将一个比自身体积大得多的物体冷却到极其低的温度。
Flexible protonic/electronic coupled neuron transistors self-assembled on paper substrates for logic applications
Wei Dou, Li Qiang Zhu, Jie Jiang, and Qing Wan
Appl. Phys. Lett. 102, 093509 (2013) | HTML | PDF
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[应用物理学快报]：人造神经网络技术领域取得进展
news.bbioo.com
导读：神经元晶体管(vFET)作为一种多功能、智能化的晶体管，在人造神经网络应用中起着重要的作用。这类晶体管是 通过电容耦合效应计算多端输入信号的加权和，来控制晶体管的导通和截止，能量消耗少，非常类似于人工神经元器件的工作模式。这类器件是在传统硅基电路的基 础上发展起来的，采用复杂的CMOS工艺制作神经元晶体管，不符合低成本应…
An optical technique for fast and ultrasensitive detection of ammonia using magnetic nanofluids
V. Mahendran and John Philip
Appl. Phys. Lett. 102, 063107 (2013) | HTML | PDF
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Optical toxic-gas detector
Nature.com | Research highlights | 12 March 2013
Researchers have invented a novel, fast and ultrasensitive magnetic-nanofluid-based optical sensor that changes color on exposure to extremely low concentrations of ammonia . The sensor will be useful in detecting minute traces of ammonia in industrial and environmental samples.
Colour changing nanofluid senses ammonia
Nanotechweb.org | Mar 7, 2013
Researchers at the Indira Gandhi Centre for Atomic Research (IGCAR) in India have made a new type of optical sensor from magnetically polarizable nanofluids and have used the device to detect tiny amounts of ammonia in solution. The sensor, which quickly changes colour in the presence of the analyte, could come in useful for many practical applications, such as monitoring pollution levels in rivers around industrial plants….
Origin of 1/f noise in graphene multilayers: Surface vs. volume
Guanxiong Liu, Sergey Rumyantsev, Michael S. Shur, and Alexander A. Balandin
Appl . Phys. Lett. 102, 093111 (2013) | HTML | PDF
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Improving Electronics by Solving Nearly Century-old Problem
Space Daily | 03/11/13 21:23
Solving nearly century-old problem: Using graphene, professor finds out what causes low-frequency electronic 1/f noise
Phys.org | March 7, 2013
By Sean Nealon
The work, led by Alexander A. Balandin, a professor of electrical engineering at UC Riverside, focused on the low-frequency electronic 1/f noise, also known as pink noise and flicker noise. It is a signal or process with a power spectral density inversely proportional to the frequency. It was first discovered in vacuum tubes in 1925 and since then it has been found everywhere from fluctuations of the intensity in music recordings to human heart rates and electrical currents in materials and devices. …
Improving Electronics by Solving Nearly Century-old Problem
TMCnet.com | 03/07/13 07:00
A University of California, Riverside Bourns College of Engineering professor and a team of researchers published a paper today that show how they solved an almost century-old problem that could further help downscale the size of electronic devices.
petite news pas de soitec ici
Forums - Boursorama | 03/07/13 00:54
A l'Université de Californie, Riverside Bourns College of Engineering professeur et une équipe de chercheurs a publié un article aujourd'hui qui montrent comment ils ont résolu un problème presque centenaire qui pourrait en outre aider à réduire l'échelle de la taille des dispositifs électroniques.
The mystery of the 1/f noise
Materialstoday.com | 04 March 2013
The low-frequency 1/f noise, sometimes called pink noise or flicker noise, refers to fluctuation processes with a power spectral density S∼1/fγ, where γ∼1 – is a ubiquitous phenomenon found in many physical, biological and even economic systems – fluctuations of the sea level; intensity in a music recording; human heart rates; or electrical currents in semiconductor devices.
Graphene helps to unravel the mystery of 1/f noise in electronic devices
Nanowerk.com | 02/27/2013
A neutron spin echo resolved grazing incidence scattering study of crystallites in organic photovoltaic thin films
A. J. Parnell, R. M. Dalgliesh, R. A. L. Jones, and A. D. F. Dunbar
Appl. Phys. Lett. 102, 073111 (2013) | HTML | PDF
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Neutron Scattering Technique May Increase Thin-Film Solar Efficiency
Solar Novus Today | 11 March 2013
by Sandra Henderson
Engineers and scientists from the University of Sheffield, UK, have pioneered a new technique — called SERGIS — to measure the structure of PCBM crystallites (a fullerene derivative of the C60 buckyball) in thin-film solar cell materials, which will ultimately help to make the cells more efficient.
Macroscale refrigeration by nanoscale electron transport
Peter J. Lowell, Galen C. O'Neil, Jason M. Underwood, and Joel N. Ullom
Appl. Phys. Lett. 102, 082601 (2013) | HTML | PDF
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Flabbergasting quantum refrigerator like ‘window A/C for Lincoln Memorial’
Science Blog | 03/10/13 10:53
NIST quantum refrigerator offers extreme cooling and convenience
Nanotechnology Now | 03/09/13 13:23
Solid-state refrigerator works by using quantum physics in micro- and nanostructures
Nanowerk | 03/09/13 09:57
NIST Quantum Refrigerator Offers Extreme Cooling And Convenience
Science Newsline | 03/08/13 19:04
Researchers at the National Institute of Standards and Technology (NIST) have demonstrated a solid-state refrigerator that uses quantum physics in micro- and nanostructures to cool a much larger object to extremely low temperatures.
Polarized light emission from GaInN light-emitting diodes embedded with subwavelength aluminum wire-grid polarizers
Ming Ma, David S. Meyaard, Qifeng Shan, Jaehee Cho, E. Fred Schubert, Gi Bum Kim, Min-Ho Kim, and Cheolsoo Sone
Appl. Phys. Lett. 101, 061103 (2012) | HTML | PDF
As featured in: Nanotechnology student seeks brighter and more efficient LEDs Nanowerk | 03/07/13 01:58 Rensselaer Polytechnic Institute student Ming Ma has developed a new method to manufacture light-emitting diodes (LEDs) that are brighter, more energy efficient, and have superior technical properties than those on the market today.
High-resolution and high-sensitivity phase-contrast imaging by focused hard x-ray ptychography with a spatial filter
Yukio Takahashi, Akihiro Suzuki, Shin Furutaku, Kazuto Yamauchi, Yoshiki Kohmura, and Tetsuya Ishikawa
Appl. Phys. Lett. 102, 094102 (2013) | HTML | PDF
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Developed a method for X-ray microscopy "high sensitivity" in the "high spatial resolution", Osaka University and RIKEN
Nikkei.co.jp (日経電子版)|03/04/13 05:17
Developed a method for X-ray microscopy of innovative "high sensitivity" and "high spatial resolution"
- Expected to expand its application to high-resolution imaging of soft biological tissue-…
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