Imagine machines smaller than microscopic in size working around us, in us and for us. Imagine them seeking out diseases, cleaning the environment and making the world a better place. Just as a car is a combination of a whole series of separate items, engine, suspension, wheels, electronics, chassis, etc, nanomachines too need to be constructed from a range of components.
One such component is a type of actuator to open and close things, to absorb shock, lift or lower loads and provide other forms of linear movement. It is known that forms of carbon nanotubes can function as actuators, but thanks to some new research we have a better understanding of what they do and how well they do it.
A Fraunhofer Techologie-Entwicklungsgruppe based research team have published a paper looking at an actuation measurement set-up constructed to perform electromechanical characterization of bucky papers. Bucky papers are sheets of carbon nanotubes obtained via filtration process. The research paper has been published in a special edition of the open access journal, AZoJono*. This special edition of AZoJono features a number of papers from DESYGN-IT, the project seeking to secure Europe as the international scientific leader in the design, synthesis, growth, characterisation and application of nanotubes, nanowires and nanotube arrays for industrial technology.
The researchers, Urszula Kosidlo, Daniel Georg Weis, Klaus Hying, Mohammad H. Haque and Ivica Kolaric, constructed a special measurement device and performed their tests in liquid electrolyte to allow the build up of the electrochemical double-layer, which is necessary for the actuation of carbon nanotubes. The measurements are performed with focus on the out-of-plane strain and stress generated by the structure of interest.
The device they designed was found to be useful for characterising electromechanical properties of bucky paper. Using their device, they were able to determine the dependence on applied voltage, electrolyte used as well as performance under additional load applied on the sample. They also concluded that to gain a better understanding of the actuation mechanism of bucky paper, galvanodynamic tests, current/charge controlled should be performed. The device that was used in this investigation is also suitable for this application.
The article is available to view in full in AZoJono at http://www.azonano.com/Details.asp?ArticleID=2043
One in 5 materials chemistry papers may be wrong, study suggests
15.12.2017 | Georgia Institute of Technology
Scientists channel graphene to understand filtration and ion transport into cells
11.12.2017 | National Institute of Standards and Technology (NIST)
DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.
Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
15.12.2017 | Power and Electrical Engineering
15.12.2017 | Materials Sciences
15.12.2017 | Life Sciences