Featured Research

from universities, journals, and other organizations

A Look Into The Nanoscale

Date:
June 27, 2008
Source:
DOE/Lawrence Livermore National Laboratory
Summary:
Researchers have captured time-series snapshots of a solid as it evolves on the ultra-fast timescale. Using femtosecond X-ray free electron laser (FEL) pulses, the team is able to observe condensed phase dynamics such as crack formation, phase separation, rapid fluctuations in the liquid state or in biologically relevant environments.

Sample evolution revealed by coherent X-ray diffraction. Measured single-shot diffraction patterns at 25 ps (a ), corresponding to the object just before the laser excitation pulse, and diffraction patterns from the same object at 10 ps (b), 15 ps (c), 20 ps (d) 40 ps (e) and 140 ps ( f ) after the laser pulse.
Credit: Image courtesy of DOE/Lawrence Livermore National Laboratory

Lawrence Livermore National Laboratory researchers have captured time-series snapshots of a solid as it evolves on the ultra-fast timescale.

Related Articles


Using femtosecond X-ray free electron laser (FEL) pulses, the team, led by Anton Barty, is able to observe condensed phase dynamics such as crack formation, phase separation, rapid fluctuations in the liquid state or in biologically relevant environments.

Other Livermore scientists include Michael Bogan, Stafan Hau-Riege, Stefano Marchesini, Matthias Frank, Bruce Woods, former Livermore researcher Saša Bajt and former LLNL scientist Henry Chapman, who is now at the Centre for Free Electron Laser Science, DESY, in Hamburg, Germany.

“The ability to take images in a single shot is the key to studying non-repetitive behavior mechanisms in a sample,” Barty said.

As the femtosecond laser blasts the sample, it is destroyed, but not before the scientists created images with a 50-nanometer spatial resolution, and a 10-femtosecond shutter speed. (A femtosecond is one billionth of one millionth of a second. For context, a femtosecond is to a second as a second is to about 32 million years.)

“This experiment opens the door to a new regime of time-resolved experiments in mesoscopic dynamics,” Barty said. “This technique could be extended to a few nanometers spatial and a few tens of femtoseconds temporal resolution.”

This is the first time that optical pulses have been used to image samples at the nanometer-spatial resolution scale. Earlier studies were limited to a few micrometers.

The “shutter speed” of the measurements is determined by the femtosecond duration of the FEL X-ray pulse. This allowed the team to obtain nanometer spatial resolution of violent and destructive events in which the sample is completely destroyed.

The new technique is necessary to study ultrafast dynamics of non crystalline materials at nanometer-length scales.

This includes fracture dynamics, shock formation, spallation, ablation and plasma formation under extreme conditions.

The technique also allows researchers to image dynamic process in the solid state such as nucleation and phase growth, phase fluctuations and various forms of electronic or magnetic segregation.

The research appears in the June 22 online edition of Nature Photonics.


Story Source:

The above story is based on materials provided by DOE/Lawrence Livermore National Laboratory. Note: Materials may be edited for content and length.


Cite This Page:

DOE/Lawrence Livermore National Laboratory. "A Look Into The Nanoscale." ScienceDaily. ScienceDaily, 27 June 2008. <www.sciencedaily.com/releases/2008/06/080623135022.htm>.
DOE/Lawrence Livermore National Laboratory. (2008, June 27). A Look Into The Nanoscale. ScienceDaily. Retrieved October 24, 2014 from www.sciencedaily.com/releases/2008/06/080623135022.htm
DOE/Lawrence Livermore National Laboratory. "A Look Into The Nanoscale." ScienceDaily. www.sciencedaily.com/releases/2008/06/080623135022.htm (accessed October 24, 2014).

Share This



More Matter & Energy News

Friday, October 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

IKEA Desk Converts From Standing to Sitting With One Button

IKEA Desk Converts From Standing to Sitting With One Button

Buzz60 (Oct. 24, 2014) IKEA is out with a new convertible desk that can convert from a sitting desk to a standing one with just the push of a button. Jen Markham explains. Video provided by Buzz60
Powered by NewsLook.com
Ebola Protective Suits Being Made in China

Ebola Protective Suits Being Made in China

AFP (Oct. 24, 2014) A factory in China is busy making Ebola protective suits for healthcare workers and others fighting the spread of the virus. Duration: 00:38 Video provided by AFP
Powered by NewsLook.com
Real-Life Transformer Robot Walks, Then Folds Into a Car

Real-Life Transformer Robot Walks, Then Folds Into a Car

Buzz60 (Oct. 24, 2014) Brave Robotics and Asratec teamed with original Transformers toy company Tomy to create a functional 5-foot-tall humanoid robot that can march and fold itself into a 3-foot-long sports car. Jen Markham has the story. Video provided by Buzz60
Powered by NewsLook.com
Police Testing New Gunfire Tracking Technology

Police Testing New Gunfire Tracking Technology

AP (Oct. 24, 2014) A California-based startup has designed new law enforcement technology that aims to automatically alert dispatch when an officer's gun is unholstered and fired. Two law enforcement agencies are currently testing the technology. (Oct. 24) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins