文章资讯
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- 2015-05-29 Technology using microwave heating may impact electronics manufacture
- Engineers at Oregon State University have successfully shown that a continuous flow reactor can produce high-quality nanoparticles by using microwave-assisted heating – essentially the same forces that heat up leftover food with such efficiency.
Instead of warming up yesterday's pizza, however, this concept may provide a technological revolution.
It could change everything from the production of cell phones and televisions to counterfeit-proof money, improved solar energy systems or quick identification of troops in combat. - See Details
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- 2015-05-28 Charging portable electronics in 10 minutes
- Researchers at the University of California, Riverside Bourns College of Engineering have developed a three-dimensional, silicon-decorated, cone-shaped carbon-nanotube cluster architecture for lithium ion battery anodes that could enable charging of portable electronics in 10 minutes, instead of hours.
Lithium ion batteries are the rechargeable battery of choice for portable electronic devices and electric vehicles. But, they present problems. Batteries in electric vehicles are responsible for a significant portion of the vehicle mass. And the size of batteries in portable electronics limits the trend of down-sizing. - See Details
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- 2015-05-28 A faster path to optical circuits
- Just as electronic circuits work with electrical charges, optical circuits process pulses of light, which gives them a distinct advantage in terms of speed. Optical technologies are therefore the object of intense research, aiming to develop novel optical devices that can control the flow of light at the nanometer scale. EPFL scientists have developed a new method that can optimally design a widely-used class of optical devices with unprecedented effectiveness.
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- 2015-05-28 Physicists predict behavior of rare materials at near-room temperature
- New theoretical physics research reveals rare materials that possess both controllable magnetic and electric polarization properties at near-room temperatures.
The discovery could lead to longer battery life and increased memory storage forelectronic devices, said Yurong Yang, a research assistant professor at the University of Arkansas. - See Details
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- 2015-05-28 A new model for quantum noise
- The National Physical Laboratory (NPL) has published research in Nature Communications that updates one of the most fundamental concepts in the physics of quantum electronic devices - the standard tunnelling model (STM).
The STM was introduced in the 1970s to describe the thermal properties of glass at temperatures close to absolute zero. At these low temperatures quantum mechanics takes over from classical physics and strange properties begin to emerge. Quantum tunnelling is one such property and describes how atoms can cross barriers that they should not be able to according to classical physics. - See Details
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- 2015-05-28 Making smartphones smarter with see-through sensors
- Your smartphone's display glass could soon be more than just a pretty face, thanks to new technology developed by researchers from Montreal and the New York-based company Corning Incorporated. The team has created the first laser-written light-guiding systems that are efficient enough to be developed for commercial use. They describe their work in a paper published today in The Optical Society's (OSA) open-access journal, Optics Express.
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- 2015-05-28 Seeking the ability to design, control and build new materials at the level of individual atoms
- The ability to design, control and build new materials at the level of individual atoms could open up a whole new world of electronic devices.
Making a perfectly flat layer of billiard balls is fairly straightforward. Doing the same thing with atoms is rather more difficult. But as we demand more of materials, the ability to control atoms as if they were billiard balls is required to make the next generation of advanced materials possible. - See Details
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- 2015-05-28 A simple solution for big data
- Categorizing and representing huge amounts of data—we're talking about peta- or even exabytes of information—synthetically is a challenge of the future. A research paper from the International School for Advanced Studies in Trieste, published in Science, proposes an efficient procedure to face up to this challenge.
Experts use the expression big data to indicate huge amounts of information, such as those (photos, videos, texts, but also other more technical types of data) shared at any time by billions of people on computers, smartphones and other electronic devices. The present-day scenario offers unprecedented perspectives: tracking flu epidemics, monitoring road traffic in real time, or handling the emergency of natural disasters, for example. - See Details
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- 2015-05-28 Forest of carbon nanotubes (w/ Video)
- This image shows a 'forest' of carbon nanotubes – thousands upon thousands of tiny rolls of carbon atoms, grown on a scrap of copper foil. James Dolan explains how easy it is to run across beautiful scenery such as this when attempting to fabricate new electronic devices for the first time.
"It is easy to become distracted by the inherent beauty of the landscapes that can be found when investigating materials on the nanoscale. - See Details
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- 2015-05-28 A new method to detect infrared energy using a nanoporous ZnO/n-Si photodetector
- Experiments aimed at devising new types of photodetectors have been triggered by the increasing use of optoelectronic devices in personal electronics, cameras, medical equipment, computers and by the military. Professor Zhao Kun and co-researchers at the State Key Laboratory of Petroleum Resource and Prospecting, part of the China University of Petroleum in Beijing, have proposed a new type of infrared photodetector.
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- 2015-05-28 Device captures energy from walking to recharge wireless gadgets
- By the end of 2014, Earth will be home to more mobile electronic devices than people. Smartphones, tablets, e-readers, not to mention wearable health and fitness trackers, smart glasses and navigation devices—today's population is more plugged in than ever before.
But our reliance on devices is not problem-free: - See Details
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- 2015-05-27 Digital rights group: Some Android phones may tell location history
- Is your phone a calling companion or callout snitch? The Electronic Frontier Foundation delivered findings about some Android phones on Thursday—concerning newer, not older, models. According to EFF findings, a number of newer Android devices could serve up a privacy headache by broadcasting your whereabouts. The phone could turn snitch in revealing the most recently connected wi-fi networks that a device has joined while the mobile device is in sleep mode.
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- 2015-05-27 Global device sales shifting to mobile, survey finds
- Global sales of electronic devices including PCs, tablets and mobile phones hit 2.4 billion units this year, with the mobile segment leading the way, a survey showed Monday.
The survey by Gartner Inc. suggests a moderation in the declining PC market, predicting that tablet sales will overtake the traditional computer by 2015. - See Details
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- 2015-05-27 Apple granted patent for all-glass iPhone, iPad building process
- Apple has been granted a patent for a method to create all-glass shells for electronic devices, such as iPhones and iPads.
The method described in the patent, first reported byApple Insider, would allow Apple to create glass shells that are durable and lightweight. Glass shells would be created by fusing together separate glass pieces and then machining them down to the desired shape. - See Details
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- 2015-05-27 Getting a charge out of water droplets
- Last year, MIT researchers discovered that when water droplets spontaneously jump away from superhydrophobic surfaces during condensation, they can gain electric charge in the process. Now, the same team has demonstrated that this process can generate small amounts of electricity that might be used to power electronic devices.
The new findings, by postdoc Nenad Miljkovic, associate professor of mechanical engineering Evelyn Wang, and two others, are published in the journal Applied Physics Letters. - See Details
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- 2015-05-27 Understanding graphene's electrical properties on an atomic level
- Graphene, a material that consists of a lattice of carbon atoms, one atom thick, is widely touted as being the most electrically conductive material ever studied. However, not all graphene is the same. With so few atoms comprising the entirety of the material, the arrangement of each one has an impact on its overall function.
Now, for the first time, researchers from the University of Pennsylvania have used a cutting-edge microscope to study the relationship between the atomic geometry of a ribbon of graphene and its electrical properties. - See Details
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- 2015-05-27 Researchers develop an extremely simple procedure to obtain nanosized graphenes
- The prestigious journal Angewandte Chemie has recently published a work by CiQUS researchers (University of Santiago de Compostela, Spain) in collaboration with IBM Research – Zurich (Switzerland), which describes an extremely simple method to obtain high quality nanographenes from easily available organic compounds.
Graphene is considered an unique material, which is leading to the emergence of a completely new technology. One of the biggest challenges in this new field is the development of methodologies for the preparation on this material with nanometric size and high quality: if the researchers get a perfect control over their size and geometry, they could explore new applications for high-performance electronic devices. - See Details
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- 2015-05-27 Mobile demand helps lift Taiwan exports 10.6% in June
- Taiwan's export orders in June rose 10.6 percent year-on-year to a 17-month high, largely boosted by continuing strong demand for electronic products, the government said Monday.
Export orders totalled $38.82 billion in June after the highest on-year increase since 17.9 percent growth posted in January 2013, and were also up 2.1 percent from the previous month, the ministry of economic affairs said in a statement. - See Details
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- 2015-05-27 Chemists eye improved thin films with metal substitution
- The yield so far is small, but chemists at the University of Oregon have developed a low-energy, solution-based mineral substitution process to make a precursor to transparent thin films that could find use in electronics and alternative energy devices.
A paper describing the approach is highlighted on the cover of the July 21 issue of the journal Inorganic Chemistry, which draws the most citations of research in the inorganic and nuclear chemistry fields. The paper was chosen by the American Chemical Society journal as an ACS Editor's Choice for its potential scientific and broad public interest when it initially published online. - See Details
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- 2015-05-27 Squink personal factory aims to make circuit prototyping easy
- The team at BotFactory have launched a Kickstarter campaign for their prize endeavor, Squink, to bring it to life. The team behind Squink started out with the question, what if making circuit boards were easy? This is a personal electronic circuit factory, and "its purpose is to make circuit prototyping as easy and seamless as possible." A promotional video showing Squink makes that clear. Put another way, this is a personal factory for electronic circuits, which sits on your desk, and, in minutes, prints and assembles your circuits on flexible or rigid substrates.
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- 2015-05-27 Understanding the source of extra-large capacities in promising Li-ion battery electrodes
- Lithium (Li) ion batteries power almost all of the portable electronic devices that we use everyday, including smart phones, cameras, toys, and even electric cars. Researchers across the globe are working to find materials that will lead to safe, cheap, long-lasting, and powerful Li-ion batteries.
Working at various U.S. Department of Energy light source facilities and at Cambridge and Stony Brook universities, a group of researchers recently studied a class of Li-ion battery electrodes that have capacities much greater than those of the materials used in today's batteries. The researchers wanted to determine why these materials can often store more charge than theory predicts. - See Details
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- 2015-05-26 Teens love vacation selfies; adults, not so much
- Jacquie Whitt's trip to the Galapagos with a group of teenagers was memorable not just for the scenery and wildlife, but also for the way the kids preserved their memories. It was, said Whitt, a "selfie fest."
For this generation, "digital devices are now part of the interpretive experience," said Whitt, co-founder of Adios Adventure Travel. - See Details
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- 2015-05-26 Unexpected phenomenon discovered at the surface of a transition metal oxide material
- An international team of scientists, including University of Nebraska-Lincoln physicists J. D. Burton and Evgeny Tsymbal, has discovered what they called an intriguing and entirely unexpected phenomenon at the surface of a transition metal oxide material. Such materials serve as a hotbed for electrochemical applications like solid fuel cells and oxygen sensors, as well as potential applications in future electronic devices.
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- 2015-05-26 Smartphones as a health tool for older adults
- A team of researchers from the Universitat Politècnica de Catalunya · BarcelonaTech (UPC) and the Universitat Autònoma de Barcelona (UAB) is creating a smartphone app that will help older adults to understand their state of health and develop healthier habits.
How can we promote an active lifestyle and encourage habits that improve our quality of life, particularly in older adults? To address the issue, a multidisciplinary team led by the researcher Miguel Àngel García, a member of the Electronic and Biomedical Instrumentation group and lecturer at the Department of Electronic Engineering of the Universitat Politècnica de Catalunya · BarcelonaTech (UPC), has harnessed the potential of mobile phones to measure physiological variables such as physical activity and heart rate variability. - See Details
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- 2015-05-26 How hostile is space?
- Space may seem calm, but it is a more hostile environment than that on Earth. Invisible radiation is a big problem for space enthusiasts and scientific instruments. Substituting electronic devices to do human tasks reduces risk, but it doesn't eliminate all risk.
Every active device in space is dealing with such risks right now – be it Rosetta the comet chaser or the satellite responsible for streaming live sports. These cause many problem for designers of space instruments, on which millions of taxpayer's money is spent and which are out there to collect important information and provide vital services. - See Details
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- 2015-05-26 Pairing old technologies with new for next generation electronic devices
- UCL scientists have discovered a new method to efficiently generate and control currents based on the magnetic nature of electrons in semi-conducting materials, offering a radical way to develop a new generation of electronic devices.
One promising approach to developing new technologies is to exploit the electron's tiny magnetic moment, or 'spin'. Electrons have two properties – charge and spin – and although current technologies use charge, it is thought that spin-based technologies have the potential to outperform the 'charge'-based technology of semiconductors for the storage and process of information. - See Details
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- 2015-05-26 Tattoo biobatteries produce power from sweat
- In the future, working up a sweat by exercising may not only be good for your health, but it could also power your small electronic devices. Researchers will report today that they have designed a sensor in the form of a temporary tattoo that can both monitor a person's progress during exercise and produce power from their perspiration.
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- 2015-05-26 Eco-friendly 'pre-fab nanoparticles' could revolutionize nano manufacturing
- A team of materials chemists, polymer scientists, device physicists and others at the University of Massachusetts Amherst today report a breakthrough technique for controlling molecular assembly of nanoparticles over multiple length scales that should allow faster, cheaper, more ecologically friendly manufacture of organic photovoltaics and other electronic devices. Details are in the current issue of Nano Letters.
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- 2015-05-26 Highly conductive organic metal looks promising for disposable electronic devices
- Although organic materials are often used as semiconductors, such as in organic LEDs and organic transistors, organic materials that have an electrical conductivity as high as that of metals are still very scarce. One problem with developing organic metals is that there is a tradeoff in terms of their crystalline structure: a high crystallinity is required for high conductivity, but is detrimental to the materials' processability.
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- 2015-05-26 Study confirms that uncontrolled e-waste treatment produces carcinogenic effects
- A study carried out by the research group of the University of Alicante "Waste, Pyrolysis and Combustion", University of Alicante, confirms that most of the waste from electrical and electronic equipment (WEEE) is not treated properly. In this sense, once reused and recycled in treatment plants, electronic devices will pass into thermal systems (incinerators, cement plants, ceramics ...) where contaminants can be destroyed under controlled conditions.
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