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Nanotechnology Spotlight

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Showing Spotlights 137 - 144 of 146 in category Electronics, NEMS (newest first):


Flipping the spin...

Spintronics (short for "spin-based electronics") is an emergent technology which exploits the quantum propensity of electrons to spin as well as making use of their charge state. The spin itself is manifested as a detectable weak magnetic energy state characterized as "spin up" and "spin down". Spin flip length is an important parameter to know for designing spintronics devices. Because in spintronics, electron spin carries the information, it is important to know how far electrons can travel in a device before this spin information is lost. In a discovery that could contribute to the emerging field of spintronics, scientists at Oak Ridge National Laboratory (ORNL) and the Institute of Physics, Chinese Academy of Science, have demonstrated a way to measure the distance an electron travels in nanoscale materials before its spin is reversed due to scattering.

Posted: Sep 27th, 2006

Biomechanical nanoswitches open door to green bioelectronics

The ability to generate functional nanoswitches might ultimately allow the integration of nano-components into electronic components. Single molecule switches using scanning tunneling microscope (STM) manipulation have been demonstrated before. Mostly these switches are based on single atoms or small molecules and operate between two distinct states. Researchers now realized the first multi-step switching process by STM manipulation on a single molecule. Instead of small organic molecules they used a large plant molecule which is environmentally friendly and abundant in nature.

Posted: Sep 18th, 2006

A novel approach to making organic thin film transistors

Organic thin film transistors (OTFTs) based on have attracted a great deal of attention as they are the critical components to fabricate low cost and large area flexible displays and sensors for future application in organic electronics technology. However, the major problem to use organic thin film transistor in logic circuits is the high operating voltage required. Researchers in India believe this problem can be solved by using organic materials with high dielectric constant as gate dielectrics.

Posted: Aug 10th, 2006

Towards molecular electronics

A potential solution to overcoming the fundamental scaling limits of silicon-based electronic circuitry is the use of a single molecular layer that self-organizes between two electrodes: so-called molecular electronics. Nature itself is highly efficient in using self-organized structures for electronic transport (photosynthesis in plants, nerve cells, etc.), and now similar self-organization of organic molecules is used to make electronic devices. Electric transport through single molecules has been studied extensively by both academic and industrial research groups. It has been demonstrated that the size of a diode, an element used in electronic circuitry, can be reduced reproducibly below 1.5 nm. Transport data, however, typically differ by many orders of magnitude and the fabrication hurdle is reliability and yield. Researchers in The Netherlands now have demonstrated a technology to manufacture reproducible molecular diodes with high yields (>95 %) with unprecedented lateral dimensions.

Posted: Aug 7th, 2006

A nanocapacitor with giant dielectric permittivity

The area of nanodielectrics is relatively unexplored but research shows that nanocapacitors could find important applications for instance in energy storage and ultrasensitive transducers in nanoelectronic circuits.

Posted: Apr 14th, 2006

Electrochemical probes with nanometer dimensions

Researchers in Finland and The Netherlands demonstrated that it is possible to grow and wire a single platinum nanoparticle using a single-walled carbon nanotube, thus providing a bottom-up approach to building nanoelectrodes.

Posted: Apr 5th, 2006

A new process allows growing carbon nanotubes directly onto MEMS

Researchers in Switzerland have successfully integrated carbon nanotubes (CNTs) directly into a polysilicon chip. This technique is opening the way towards NEMS and CNT based system integration and the synthesis and evaluation of mechanical nano-scale transducers based on CNTs.

Posted: Mar 17th, 2006