Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Draw out of the predicted interatomic force

This is a schematic picture using simple cubic lattice, where bold and broken lines denote short strong bonds and long weak ones, respectively.
CREDIT: M. Inui, Graduate School of Integrated Arts and Sciences, Hiroshima University, et al.
This is a schematic picture using simple cubic lattice, where bold and broken lines denote short strong bonds and long weak ones, respectively.

CREDIT: M. Inui, Graduate School of Integrated Arts and Sciences, Hiroshima University, et al.

Abstract:
Grant-in-Aid for Scientific Research, the Ministry of Education, Culture, Sports, Science and Technology, Japan.

Liquid Bi shows a peculiar dispersion of the acoustic mode, which is related to the Peierls distortion in the crystalline state. These results will provide valuable inspiration to researchers developing new materials in the nanotechnology field.

Draw out of the predicted interatomic force

Hiroshima, Japan | Posted on August 30th, 2015

Studies of the atomic dynamics in liquid Bi have been revisited more recently. The previous inelastic neutron scattering (INS) results for liquid Bi showed inconsistency for the inelastic excitation of the acoustic mode. These results were also different from the ab initio molecular dynamics (AIMD) prediction that indicated that the peculiar atomic dynamics arose from an anisotropic interatomic force in this monatomic liquid [1].

Therefore, it is important to observe the inelastic excitation of the acoustic mode in liquid Bi using inelastic x-ray scattering (IXS).

Professor M. Inui at Hiroshima University and his collaborators at Kumamoto University, Keio University, SPring-8/JASRI, and the RIKEN SPring-8 Center measured the IXS on liquid Bi at SPring-8 [2]. This research group found that the dispersion curve of the excitation energy of the acoustic mode exhibits a flat region as a function of the momentum transfer.

The experiments conducted by Professor Inui et al. used a single-crystal sapphire cell of the Tamura type that was carefully machined to provide a 0.04-mm sample thickness.

It is said that only his research group can make full use of this "world-famous" cell, which was used to stably conduct an x-ray beam experiment under high temperatures.

Furthermore, this research group reported that the IXS experimental results for liquid Bi clearly show a distinct inelastic excitation of the acoustic mode. This resolves the previous disagreement in the literature. Those researchers said, "Consistent with ab initio calculations of liquid Bi[1], the dispersion curve was nearly flat from 7 to 15 nm [to the negative 1 power]."

They also mentioned, "A long-range force is needed to reproduce the flatness of the dispersion curve, and the long-range force has to strongly be related to a local structure consisting of shorter and longer bounds in the liquid."

This research group demonstrated a possible mechanism for the unusual dispersion of liquid Bi. Their results will greatly contribute to the development of nanotechnology.

####

For more information, please click here

Contacts:
Norifumi Miyokawa

Copyright © Hiroshima University

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Reference

Related News Press

News and information

Nanophotonic platform boosts efficiency of nonlinear-optical quantum teleportation April 25th, 2025

Quantum sensors tested for next-generation particle physics experiments: New research shows that the specialized sensors can detect particles more precisely April 25th, 2025

Portable Raman analyzer detects hydrogen leaks from a distance: Device senses tiny concentration changes of hydrogen in ambient air, offering a dependable way to detect and locate leaks in pipelines and industrial systems April 25th, 2025

Enhancing power factor of p- and n-type single-walled carbon nanotubes April 25th, 2025

Tumor microenvironment dynamics: the regulatory influence of long non-coding RNAs April 25th, 2025

Physics

Quantum sensors tested for next-generation particle physics experiments: New research shows that the specialized sensors can detect particles more precisely April 25th, 2025

Govt.-Legislation/Regulation/Funding/Policy

Rice researchers harness gravity to create low-cost device for rapid cell analysis February 28th, 2025

Department of Energy announces $71 million for research on quantum information science enabled discoveries in high energy physics: Projects combine theory and experiment to open new windows on the universe January 17th, 2025

Quantum engineers ‘squeeze’ laser frequency combs to make more sensitive gas sensors January 17th, 2025

Chainmail-like material could be the future of armor: First 2D mechanically interlocked polymer exhibits exceptional flexibility and strength January 17th, 2025

Discoveries

Portable Raman analyzer detects hydrogen leaks from a distance: Device senses tiny concentration changes of hydrogen in ambient air, offering a dependable way to detect and locate leaks in pipelines and industrial systems April 25th, 2025

Enhancing power factor of p- and n-type single-walled carbon nanotubes April 25th, 2025

Tumor microenvironment dynamics: the regulatory influence of long non-coding RNAs April 25th, 2025

Ultrafast plasmon-enhanced magnetic bit switching at the nanoscale April 25th, 2025

Materials/Metamaterials/Magnetoresistance

Enhancing power factor of p- and n-type single-walled carbon nanotubes April 25th, 2025

Chainmail-like material could be the future of armor: First 2D mechanically interlocked polymer exhibits exceptional flexibility and strength January 17th, 2025

Enhancing transverse thermoelectric conversion performance in magnetic materials with tilted structural design: A new approach to developing practical thermoelectric technologies December 13th, 2024

FSU researchers develop new methods to generate and improve magnetism of 2D materials December 13th, 2024

Announcements

Portable Raman analyzer detects hydrogen leaks from a distance: Device senses tiny concentration changes of hydrogen in ambient air, offering a dependable way to detect and locate leaks in pipelines and industrial systems April 25th, 2025

Enhancing power factor of p- and n-type single-walled carbon nanotubes April 25th, 2025

Tumor microenvironment dynamics: the regulatory influence of long non-coding RNAs April 25th, 2025

Ultrafast plasmon-enhanced magnetic bit switching at the nanoscale April 25th, 2025

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Nanophotonic platform boosts efficiency of nonlinear-optical quantum teleportation April 25th, 2025

Quantum sensors tested for next-generation particle physics experiments: New research shows that the specialized sensors can detect particles more precisely April 25th, 2025

Tumor microenvironment dynamics: the regulatory influence of long non-coding RNAs April 25th, 2025

Ultrafast plasmon-enhanced magnetic bit switching at the nanoscale April 25th, 2025

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project