A new study shows that iron-bearing rocks that formed at the ocean floor 3.2 billion years ago carry unmistakable evidence of oxygen. The only logical source for that oxygen is the earliest known example of photosynthesis by living organisms, say Univ. of Wisconsin-Madison geoscientists.
Using microfluidic passages cut directly into the backsides of production field-programmable gate array devices, Georgia Institute of Technology researchers are putting liquid cooling right where it’s needed the most, a few hundred microns away from where the transistors are operating.
As the push for tinier and faster electronics continues, a new finding by Univ. of British Columbia scientists could help inform the design of the next generation of cheaper, more efficient devices. The work, published in Nature Communications, details how electronic properties at the edges of organic molecular systems differ from the rest of the material.
New chip-based optical sensing technologies developed by researchers enable the rapid detection and identification of multiple biomarkers. In a paper published in the Proceedings of the National Academy of Sciences, the researchers describe a novel method to perform diagnostic assays for multiple strains of flu virus on a small, dedicated chip.
Photonic circuits, which use light to transmit signals, are markedly faster than electronic circuits. Unfortunately, they're also bigger. It's difficult to localize visible light below its diffraction limit, about 200 to 300 nm, and as components in electronic semiconductors have shrunk to the nanometer scale, the photonic circuit size limitation has given electronic circuits a significant advantage, despite the speed discrepancy.
Physicists have wondered in recent years if they could control how atoms interact using light. Now they know that they can, by demonstrating games of quantum billiards with unusual new rules. In an article published in Physical Review Letters, a team of Univ. of Chicago physicists explains how to tune a laser to make atoms attract or repel each other in an exotic state of matter called a Bose-Einstein condensate.
The efficiency of solar cells depends on precise engineering of polymers that assemble into films 1,000 times thinner than a human hair. Today, formation of that polymer assembly requires solvents that can harm the environment, but scientists have found a "greener" way to control the assembly of photovoltaic polymers in water using a surfactant as a template.
Researchers from the Univ. of Southampton have developed a new method for measuring the mass of pulsars. Until now, scientists have determined the mass of stars, planets and moons by studying their motion in relation to others nearby, using the gravitational pull between the two as the basis for their calculations.
The surface of a single cell contains hundreds of tiny pores, or ion channels, each of which is a portal for specific ions. Ion channels are typically about 1 nm wide; by maintaining the right balance of ions, they keep cells healthy and stable. Now MIT researchers have created tiny pores in single sheets of graphene that have an array of preferences and characteristics similar to those of ion channels in living cells.
Our smartphones, tablets, computers and biosensors all have improved because of the rapidly increasing efficiency of semiconductors. Since the turn of the 21st century, organic, or carbon-based, semiconductors have emerged as a major area of interest for scientists because they are inexpensive, plentiful and lightweight and they can conduct current in ways comparable to inorganic semiconductors.
A new technique for monitoring carbon dioxide could help the energy industry’s efforts to reduce future greenhouse gas emissions, scientists have found. In a new paper published in the International Journal of Greenhouse Gas Control, researchers describe how they have used the unique signature from traces of the noble gases (helium, neon and argon) to monitor the fate of carbon dioxide stored underground.
Biomedical engineers have demonstrated a proof-of-principle technique that could give women and their oncologists more personalized information to help them choose options for treating breast cancer. Thanks to diagnostic tests, clinicians and patients can already know the type of breast cancer they're up against, but one big question remains: How likely is it that the cancer will invade other parts of the body?
Using a newly developed fabrication method, a research team has attained better than a 15% energy conversion efficiency from perovskite solar cells larger than one square centimeter area. The researchers, from Brown Univ. and the National Renewable Energy Lab, have reported their findings in Advanced Materials.
New research by chemists at Brookhaven National Laboratory offers clues that could help scientists design more effective catalysts for transforming carbon dioxide to useful products. The study reveals how a simple rearrangement of molecular attachments on an iridium hydride catalyst can greatly improve its ability to coax notoriously stable carbon dioxide molecules to react.
Over the summer, Betty Hong, assistant professor of neuroscience, spent a week at the Janelia Research Campus in Ashburn, Va., interacting and brainstorming with other researchers from around the country interested in olfaction, our sense of smell.