A nanoscopic ‘”resonator”‘ that could form the building blocks forof the logic gates inside an electromechanical computer has been developed by US researchers.
Sotiris Masmanidis at the California Institute of Technology in Pasadena and colleagues suggest that computers constructed from nanoscale electromechanical components could be more efficient and robust than purely electronic computers.
The resonator consists of a piece of gallium arsenide crystal 4 micrometres long, 0.8 micrometres wide and 0.2 micrometres deep, attached to a base. One side of the crystal “beam” is doped to provide extra electrons, while the other is doped so that it lacks them. When an alternating current (AC) voltage is applied across the post, an electric field is formed across the centre of the bar. A piezoelectric effect then kicks in, causing the gallium arsenide crystal to deform. If the AC voltage has the right frequency, the bar will resonate, vibrating like a metal bar after being struck.
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Devices made from plastic semiconductors, like solar cells and light-emitting diodes (LEDs), could be improved based on information gained using a new nanoparticle technique developed at The University of Texas at Austin.
We are approaching an evolutionary event horizon, where the organic and the synthetic, the virtual and the “real”, are merging together into an operational ecology, an existence morphology for which there is no precendent in the history of which we are currently aware, catalyzed by nanotechnology
Researchers from the University of Delaware and Washington University in St. Louis have figured out how to train synthetic polymer molecules to behave–to literally “self-assemble” –and form into long, multicompartment cylinders 1,000 times thinner than a human hair, with potential uses in radiology, signal communication and the delivery of therapeutic drugs in the human body. The discovery, a fundamental new tool for nanotechnology, is reported in the Aug. 3 issue of the prestigious journal ‘Science.’
In an assist in the quest for ever smaller electronic devices, Duke University engineers have adapted a decades-old computer aided design and manufacturing process to reproduce nanosize structures with features on the order of single molecules.
The new automated technique for nanomanufacturing suggests that the emerging nanotechnology industry might capitalize on skills already mastered by today’s engineering workforce, according to the researchers.
When it comes to searching out cancer cells, gold may turn out to be a precious metal.
Purdue University researchers have created gold nanoparticles that are capable of identifying marker proteins on breast cancer cells, making the tiny particles a potential tool to better diagnose and treat cancer. The technology would be about three times cheaper than the most common current method and has the potential to provide many times the quantity and quality of data, said Joseph Irudayaraj, an associate professor of agricultural and biological engineering.
In recent years, Americans have been intrigued by the promise of hydrogen-powered vehicles. But experts have judged that several technology problems must be resolved before they are more than a novelty.
Recently, scientists at the U.S. Department of Energy’s Argonne National Laboratory have used their insights into nanomaterials to create bendy hydrogen sensors, which are at the heart of hydrogen fuel cells used in hydrogen vehicles.