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
Argon is not the 'dope' for metallic hydrogen
24.03.2017 | Carnegie Institution for Science
Researchers make flexible glass for tiny medical devices
24.03.2017 | Brigham Young University
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
24.03.2017 | Materials Sciences
24.03.2017 | Physics and Astronomy
24.03.2017 | Physics and Astronomy