Navigation Links
Nanoparticles digging the world's smallest tunnels
Date:1/23/2013

This press release is available in German.

The world's smallest tunnels have a width of a few nanometers only. Researchers from Karlsruhe Institute of Technology (KIT) and Rice University, USA, have dug such tunnels into graphite samples. This will allow structuring of the interior of materials through self-organization in the nanometer range and tailoring of nanoporous graphite for applications in medicine and battery technology. Results are now presented in the scientific journal Nature Communications (DOI: 10.1038/ncomms2399).

The tunnels are manufactured applying nickel nanoparticles to graphite which then is heated in the presence of hydrogen gas. The surface of the metal particles, that measure a few nanometers only, serves as a catalyst removing the carbon atoms of the graphite and converting them by means of hydrogen into the gas methane. Through capillary forces, the nickel particle is drawn into the "hole" that forms and bores through the material. The size of the tunnels obtained in the experiments was in the range of 1 to 50 nanometers, which about corresponds to one thousandth of the diameter of a human hair.

To furnish proof of the real existence of these graphite tunnels, the researchers have made use of scanning electron and scanning tunneling microscopy. "Microscopes, in fact, image only the upper layers of the sample," the principal authors of the study, Maya Lukas and Velimir Meded from KIT's Institute of Nanotechnology, explain. "The tunnels below these upper layers, however, leave atomic structures on the surface whose courses can be traced and which can be assigned to the nanotunnels by means of the very detailed scanning tunneling microscopy images and based on computerized simulations." In addition, the depth of the tunnels was determined precisely by means of a series of images taken by a scanning electron microscope from different perspectives.

Porous graphite is used, for example, in the electrodes of lithium ion batteries. The charge time could be reduced using materials with appropriate pore sizes. In medicine, porous graphite could serve as a carrier of drugs to be released over longer periods of time. Replacing graphite by nonconductive materials, e.g. boron nitride, with atomic structures similar to that of graphite, the tunnels could serve as basic structures for nanoelectronic components such as novel sensors or solar cells.


'/>"/>

Contact: Monika Landgraf
presse@kit.edu
49-721-608-47414
Helmholtz Association of German Research Centres
Source:Eurekalert  

Related biology technology :

1. Marshall study shows nanoparticles used as additives in diesel fuels can travel from lungs to liver
2. Metal nanoparticles shine with customizable color
3. New measuring techniques can improve efficiency, safety of nanoparticles
4. Light touch keeps a grip on delicate nanoparticles
5. Nanoparticles seen as artificial atoms
6. Nanoparticles found in moon glass bubbles explain weird lunar soil behavior
7. Study improves understanding of surface molecules in controlling size of gold nanoparticles
8. Gold nanoparticles could treat prostate cancer with fewer side effects than chemotherapy
9. New structural information on functionalization of gold nanoparticles
10. New imaging technique homes in on electrocatalysis of nanoparticles
11. Lung mucus gel scaffold prevents nanoparticles from getting through
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Nanoparticles digging the world's smallest tunnels
(Date:4/25/2017)... Los Gatos, California (PRWEB) , ... April 25, ... ... of business, Analytical Services and Metrology Partners.     , Covalent’s Analytical Services ... labs. Most samples can be measured within 24 hours of receipt. There are ...
(Date:4/24/2017)... NEW YORK , April 24, 2017  Dante Labs ... interpretation at only EUR 850 (ca. $900). While American individuals ... marks the first time Europeans can access WGS below EUR ... which are crucial to leveraging genetic information to make informed ... more. ...
(Date:4/21/2017)... ... April 21, 2017 , ... ... Bank, today announced first round funding to three startups through the UConn Innovation ... support to new business startups affiliated with UConn. , The UConn Innovation Fund ...
(Date:4/21/2017)... ... April 21, 2017 , ... Frederick Innovative Technology Center, Inc. ... bio and technology start-ups, is hosting “Celebration Friday” (a festive gathering highlighting client ... with libations and networking at 3:30 p.m. at FITCI’s 4539 Metropolitan Court location, ...
Breaking Biology Technology:
(Date:3/24/2017)... Research and Markets has announced the addition of the ... Forecast to 2025" report to their offering. ... The Global Biometric Vehicle Access System ... over the next decade to reach approximately $1,580 million by 2025. ... forecasts for all the given segments on global as well as ...
(Date:3/22/2017)... 21, 2017 Vigilant Solutions , a ... enforcement agencies, announced today the appointment of retired FBI ... public safety business development. Mr. Sheridan brings ... including a focus on the aviation transportation sector, to ... position, Mr. Sheridan served as the Aviation Liaison Agent ...
(Date:3/9/2017)... , March 9, 2017 4Dx has ... World Lung Imaging Workshop at the University of Pennsylvania. ... invited to deliver the latest data to world leaders ... event brings together leaders at the forefront of the ... lung imaging. "The quality of the ...
Breaking Biology News(10 mins):