Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researchers want to accelerate the scanning probe microscope

01.04.2010
Since more than twenty years, scanning force microscopes are employed in research and industry. Their enormous resolution triggered many applications in nanotechnology. Their rather low image rate is however a disadvantage - changing objects and processes cannot be imaged.

Physicists of Saarland University have developed a technology that could accelerate scanning probe microscopes by a factor of 1000. The operation principle is explained from April 17th to 23rd on the Saarland Forschungsstand on the Hannover Messe (Halle 2, Stand C 44).

A scanning probe microscope works like a record player. There, a needle follows the record track, mapping the fine structure of the track. The microscope uses a much smaller silicon needle instead, and direct contact with the surface is avoided. Surface structures are mapped by atomic forces, usually van-der-Waals interactions. "Even though the needle is tiny, there are still physical limits. Therefore we were looking for a component that is again a factor of 100 smaller than those used currently" explains Uwe Hartmann, Professor for Nanostructure Reasearch and Nanotechnology at Saarland University. With the nanocantilever, as it is called, surfaces will be mapped a lot faster and with higher precision.

State-of-the-art scanning probe microscopes operate at frequencies around 100 Kilohertz. "The processes nanotechnology is dealing with, however, have typical frequencies of gigahertz. These are one billion cycles per second. On the other hand, the velocity by which a hair is growing may well disturb the imaging process." Such are the dimensions of nanoresearch, as Uwe Hartmann describes. With his team's design, one hundred images per second and more and an increase in resolution will be possible. This is more than video rate.

The detector for the movements of the nanocantilever is separated from the nanocantilever by less than the wavelength of light, just one-fivehundredth of a hair's diameter. The result is a mapping of the surface with superior speed and precision.

In cooperation with partners a prototype of the new scanning force microscope is currently set up currently, for which is also patent application is intended. Until the end of the year the device, which uses only standard materials of microelectronics, will operate. The researchers are now looking for an industry partner. "On the Hannover Messe we will not show an exhibit. However we will demonstrate the principle of the scanning force microscope in a three-dimensional visualization" the researcher from Saarbrücken explains.

Adress questions to

Prof. Dr. Uwe Hartmann
Lehrstuhl für Nanostrukturforschung und Nanotechnologie
Universität des Saarlandes
Tel. 0681 / 302 3799
Tel. 0511 / 89 497101 (Telefon am Messestand)
E-Mail: u.hartmann@mx.uni-saarland.de
Telephone interviews in studio quality with scientists of Saarland University in studio quality are possible over Rundfunk-ISDN-Codec. Interview requests please contact the public relations office (0681/302-3610)

Gerhild Sieber | idw
Further information:
http://www.uni-saarland.de/fak7/hartmann/
http://www.uni-saarland.de/pressefotos

More articles from Power and Electrical Engineering:

nachricht Energy hybrid: Battery meets super capacitor
01.12.2016 | Technische Universität Graz

nachricht Tailor-Made Membranes for the Environment
30.11.2016 | Forschungszentrum Jülich

All articles from Power and Electrical Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

Im Focus: Molecules change shape when wet

Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water

In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...

Im Focus: Fraunhofer ISE Develops Highly Compact, High Frequency DC/DC Converter for Aviation

The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.

Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

UTSA study describes new minimally invasive device to treat cancer and other illnesses

02.12.2016 | Medical Engineering

Plasma-zapping process could yield trans fat-free soybean oil product

02.12.2016 | Agricultural and Forestry Science

What do Netflix, Google and planetary systems have in common?

02.12.2016 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>