Defects damage the ideal properties of many two-dimensional materials, like carbon-based graphene. Phosphorus just shrugs.
That makes it a promising candidate for nano-electronic applications that require stable properties, according to new research by Rice University theoretical physicist Boris Yakobson and his colleagues.
Menlo Park, Calif. — Scientists have married two unconventional forms of carbon – one shaped like a soccer ball, the other a tiny diamond – to make a molecule that conducts electricity in only one direction. This tiny electronic component, known as a rectifier, could play a key role in shrinking chip components down to the size of molecules to enable faster, more powerful devices.
But high doses were no better than dummy (placebo treatment), the findings indicated.
The omega-3 fatty acids found in fish oil are able to cross over from the bloodstream into heart cells where they work to stabilise heart rhythm and protect against heart attacks.
This is particularly important for people with epilepsy because they have a significantly higher risk of having a heart attack than those without the condition.
ITHACA, N.Y. – Engineers have created a shape-changing "soft" robot that can tread over a variety of adverse environmental conditions including snow, puddles of water, flames, and the crushing force of being run over by an automobile.
COLUMBUS, Ohio—For the first time, researchers have been able to open a kind of window into the inner workings of a lithium-ion battery.
Using a neutron beam, chemists and engineers at The Ohio State University were able to track the flow of lithium atoms into and out of an electrode in real time as a battery charged and discharged.
Nearly half of older adults – 18 million people—have difficulty or get help with daily activities, according to a new study.
Researchers from the University of Michigan and the Urban Institute analyzed data from a national sample of older adults drawn from Medicare enrollment files. In all, 8,245 people were included in the 2011 the National Health and Aging Trends Study. The analysis was published in the current (September 2014) issue of the Milbank Memorial Quarterly.
Unlike electronic circuits, optical, or "photonic", circuits work with light rather than electricity, which makes them 10 to 100 times faster. They are also more energy-efficient because they show lower heat loss, better signal-to-noise ratios and are less susceptible to interference. Used especially for communications (e.g. fiber optics), optical circuits may use tiny optical cavities as 'switches' that can block or allow the flow of light, similarly to transistors in electronics.
Writing in Nature Nanotechnology, the researchers have demonstrated how combining the two-dimensional materials in a stack could create perfect crystals capable of being used in next generation transistors.
Graphene is a semiconductor when prepared as an ultra-narrow ribbon – although the material is actually a conductive material. Researchers from Empa and the Max Planck Institute for Polymer Research have now developed a new method to selectively dope graphene molecules with nitrogen atoms. By seamlessly stringing together doped and undoped graphene pieces, they were able to form "heterojunctions" in the nanoribbons, thereby fulfilling a basic requirement for electronic current to flow in only one direction when voltage is applied – the first step towards a graphene transistor.
BUFFALO, N.Y. -- Disturbing news for women on college campuses: a new study from the University at Buffalo Research Institute on Addictions (RIA) indicates that female college students who are victims of sexual assault are at a much higher risk of becoming victims again.
In fact, researchers found that college women who experienced severe sexual victimization were three times more likely than their peers to experience severe sexual victimization the following year.
Move over, graphene. An atomically thin, two-dimensional, ultrasensitive semiconductor material for biosensing developed by researchers at UC Santa Barbara promises to push the boundaries of biosensing technology in many fields, from health care to environmental protection to forensic industries.
A new combination of materials can efficiently guide electricity and light along the same tiny wire, a finding that could be a step towards building computer chips capable of transporting digital information at the speed of light.
Reporting today in The Optical Society's (OSA) high-impact journal Optica, optical and material scientists at the University of Rochester and Swiss Federal Institute of Technology in Zurich describe a basic model circuit consisting of a silver nanowire and a single-layer flake of molybendum disulfide (MoS2).
Bottom Line: A diagnosis of obsessive-compulsive disorder (OCD) appears to be associated with higher rates of schizophrenia and schizophrenia spectrum disorders.
Authors: Sandra M. Meier, Ph.D., of Aarhus University, Denmark, and colleagues.
Background: OCD and schizophrenia are distinct and infrequently overlapping disorders. But some studies have suggested higher rates of co-existing illness with the two disorders in patients.
CORAL GABLES, Fla. (Sept. 3, 2014) -- Social networks have become a dominant force in society. Family, friends, peers, community leaders and media communicators are all part of people's social networks. Individuals within a network may have different opinions on important issues, but it's their collective actions that determine the path society takes.
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OPTICS – Precision projectile tracker …