Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Discovery of crystal phase transition may enable controlled structure transformation

Finnish-Japanese joint research project yields first-rate results

A Finnish-Japanese joint research project has produced first-rate results by discovering a phase transition in the structure of crystalline materials in atomistic simulations. The research is part of the joint project "Novel approach to Fabrication of Microsystems within Joint Finnish-Japanese Collaboration" funded by the Academy of Finland.

In the research, fine, atomic-scale needles were pushed onto crystal surfaces. The sudden movement of the needle has traditionally been understood in terms of the movement of dislocations in the crystal structure. The results achieved in the project, however, suggest that it may in semiconductors be a question of a crystalline-to-crystalline phase transition. The discovery may in the future enable controlled structure transformation.

The results of the molecular dynamic simulations by Dr Dariusz Chrobak and Professor Roman Nowak from the Nordic Hysitron Laboratory of Helsinki University of Technology, together with Professor Kai Nordlund from the Helsinki University Accelerator Laboratory were published in Physical Review Letters on 26 January 2007.

The Nordic Hysitron Laboratory (NHL) international research group is part of the Department of Materials Science and Engineering at Helsinki University of Technology. The main target of NHL is mechanical characterisation of advanced materials and nanostructures using a Hysitron TriboIndenter capable of high precision probing (depth resolution 0.2 nm) of solid surfaces. The experiments are coupled with finite element and atomistic simulation of the explored nanometer-size contacts performed in cooperation with Professor Nordlund and his team from the Accelerator Laboratory at the University of Helsinki.

Niko Rinta | alfa
Further information:

More articles from Physics and Astronomy:

nachricht First results of NSTX-U research operations
26.10.2016 | DOE/Princeton Plasma Physics Laboratory

nachricht Scientists discover particles similar to Majorana fermions
25.10.2016 | Chinese Academy of Sciences Headquarters

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

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

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

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

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Greater Range and Longer Lifetime

26.10.2016 | Power and Electrical Engineering

VDI presents International Bionic Award of the Schauenburg Foundation

26.10.2016 | Awards Funding

3-D-printed magnets

26.10.2016 | Power and Electrical Engineering

More VideoLinks >>>