Image: D. Hornbaker and A. Yazdani
In yet another small step toward building nanoscale devices, scientists have determined that nanotube peapods — minute straws of carbon filled with spherical carbon molecules known as buckyballs — have tunable electronic properties. Published online by the journal Science,the findings suggest that stuffing the straws provides greater control over the electronic states of single-walled carbon nanotubes (SWNT).
Using a low-temperature scanning tunneling microscope, Ali Yazdani of the University of Illinois at Urbana-Champaign and colleagues imaged the physical structure of individual peapods (right). They mapped the motion of electrons within the pipes and, as Yazdani explains, showed "that an ordered array of encapsulated molecules can be used to engineer electron motion inside nanotubes in a predictable way." Though the harbored buckyballs modify the electronic properties of the nanotube, the atomic structure of the straw remains unchanged.
The researchers also utilized the microscope to move the buckyballs, which allowed them to compare the same section of a SWNT when it was filled and unfilled. "The encapsulated balls have a much stronger effect on the electronic structure of the tube than we had expected," says study co-author Eugene Mele of the University of Pennsylvania. Indeed, the authors conclude that their calculation not only shows how a peapod’s electronic properties differ from those of its constituent parts, "it also provides possible design rules for proposing hybrid structures having a specific type of electronic functionality."
Sarah Graham | Scientific American
Electron tomography technique leads to 3-D reconstructions at the nanoscale
24.05.2018 | The Optical Society
These could revolutionize the world
24.05.2018 | Vanderbilt University
The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.
Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...
A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.
The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...
At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.
At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...
There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?
At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
25.05.2018 | Event News
02.05.2018 | Event News
13.04.2018 | Event News
25.05.2018 | Event News
25.05.2018 | Machine Engineering
25.05.2018 | Life Sciences