A simple, chemical way to attach electrical contacts to molecular-scale electronic components has been developed by researchers at the National Institute of Standards and Technology (NIST). The recently patented* method attaches a layer of copper on the ends of delicate molecular components to avoid damage to the components that commonly occurs with conventional techniques.
Copper contact deposition on organic electronic molecules using the NIST patented process is highly specific, an important feature for building dense arrays of devices. Shown here is a cross-hatched pattern of copper deposits on 10-micrometer-wide, single-layer strips of molecules that have been bound to a gold substrate with microcontact printing.
Molecular electronics--designing carbon-based molecules to act as wires, diodes, transistors and other microelectronic devices--is one of the most dynamic frontiers in nanotechnology. An area equal to the cross-section of a typical human hair might hold about a thousand semiconductor transistors at the current state of art, but up to 13 million molecular transistors.
A key challenge in molecular electronics is making electrical contacts to the fragile molecules, chemical chains that are easily damaged. Currently, this is most often done by vaporizing a metal onto the molecules that stand like blades of grass on a metal substrate. The vaporized metal atoms are supposed to settle on the tops of the molecules but they also often eat away at the delicate structures, or fall through gaps in the "turf" and short out the device. Yields of working devices are typically only a few percent.
Michael Baum | EurekAlert!
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Physicists of the University of Würzburg have made an astonishing discovery in a specific type of topological insulators. The effect is due to the structure of the materials used. The researchers have now published their work in the journal Science.
Topological insulators are currently the hot topic in physics according to the newspaper Neue Zürcher Zeitung. Only a few weeks ago, their importance was...
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
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