Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > X-Ray Vision: Seeing Plastic Mixtures Inside and Out

Abstract:
Simultaneous surface and bulk imaging of polymer blends with X-ray spectromicroscopy

X-Ray Vision: Seeing Plastic Mixtures Inside and Out

UK | Posted on July 27th, 2010

Two scientists working in Europe have paved the way for improved plastic electronics by devising a technique that can be used to take images of plastic mixtures on the nanoscale simultaneously in the body of the material and at the surface.

Low-cost plastic solar cells, brighter displays, and a longer battery life for mobile phones and e-readers are some foreseeable outcomes, as manufactures could use the method to better understand the materials they use.

Chris McNeill of the University of Cambridge (UK) and Ben Watts of the Paul Scherrer Institute (Switzerland) are the researchers behind the breakthrough published in Macromolecular Rapid Communications. They shine synchrotron radiation on polymer mixtures to take sophisticated multiwavelength X-ray images of the bulk of the polymer mixture, and at the same time collect the electrons formed by the interaction of the X-rays with the surface of the sample. The second image can be compared directly with the first to see the differences in distribution of the components in the body of the film and on the surface.

The surface-imaging part works because any photoelectrons formed in the bulk of the material are absorbed before they reach the surface, and hence only those formed at the surface are free to leave the material and create a signal, which is "small, but measurable".

Watts explains that "the X-rays that are shone on the sample are "tuned to the carbon atom", causing the polymers, which are mostly carbon, to "resonate in a way that makes them absorb much more of the light at particular wavelengths than one would otherwise expect. This resonance between the light and atom is also very sensitive to the way in which the atoms are linked together…resulting in [high] contrast between polymer materials that otherwise appear nearly identical." An example is shown in the picture.

"At Cambridge we are interested in the use of semiconducting polymers for applications in solar cells, light-emitting diodes (LEDs), and transistors," says McNeill. "As is the case in other areas of polymer science, the blending of two semiconducting polymers sometimes enables you to achieve properties or function that cannot be achieved with the one polymer alone. The efficiency of polymer solar cells and LEDs are greatly improved through blending, and we are particularly interested in how film microstructure affects device performance. Being able to image not only bulk structure but surface structure as well is critical, as it is the surfaces that connect to the electrodes (and the outside world) so having a technique that helps us to understand how surface and bulk structures are connected was highly desirable.

Both scientists studied in same group in Australia before going separate ways; McNeill to pursue his interest in organic semiconductors, and Watts his in synchrotron-based characterization. Their expertise in complementary areas meant they were abreast of current issues in the field of plastic electronics while being aware of new opportunities for advanced materials characterization.

McNeill: "In a sense all the components required for such an experiment have been available for a while, and it required a realization of this opportunity and the assembly of the components. We acknowledge Rainer Fink of the Universität Erlangen-Nürnberg for first demonstrating the feasibility of the experiment…There were some technical challenges in having to suppress the photoelectrons being emitted from other parts of the experiment in order to detect only those coming from the sample, but these were overcome mostly through Ben's dogged persistence and thoroughness."

They see the work as benefiting not just those working with semiconducting polymers, which are necessary for plastic electronics, but all types of thin-film polymer blends. There may also be applications in other organic, but non-polymer, mixtures or other materials where "characterization of surface and bulk is crucial."

The next steps involve extending the analysis of surface structure to "a full quantitative analysis", according to McNeill, "This would require imaging at multiple X-ray photon energies." But the longer exposure times requires could damage the surfaces being studied. "We are also applying our technique to the study of polycrystalline semiconducting polymer films that will provide insight into the interplay between film microstructure and charge transport in these devices."

Macromol. Rapid Commun. 2010, DOI: 10.1002/marc.201000269

This paper is available online at:

www.materialsviews.com/details/news/761091/XRay_Vision_Seeing_Plastic_Mixtures_Inside_and_Out.html

####

Contacts:
Dr. Christopher McNeill
Room 28 Kapitsa Building,
Cavendish Laboratory,
JJ Thomson Avenue,
Cambridge CB3 0HE.
Tel: +44 (0)1223 337287

Copyright © Materials Science Journals

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 News Press

News and information

Transparent, electrically conductive network of encapsulated silver nanowires: A novel electrode for optoelectronics August 1st, 2015

Harris & Harris Group Portfolio Company, HZO, Announces Partnerships with Dell and Motorola August 1st, 2015

Advances and Applications in Biosensing, Sensor Power, and Sensor R&D to be Covered at Sensors Global Summit August 1st, 2015

Kalam: versatility personified August 1st, 2015

Display technology/LEDs/SS Lighting/OLEDs

Controlling phase changes in solids: Controlling phase changes in solids July 29th, 2015

Liquipel Debuts Eyesight-Saving ION-Glass Blue Light Protection for iPhones and Androids at RadioShack Stores Nationwide: Liquipel's Unique Protective Screen, Available at RadioShack, Cuts Harmful Blue Light Implicated in Macular Degeneration by 10x July 28th, 2015

'Seeing' molecular interactions could give boost to organic electronics July 28th, 2015

Reshaping the solar spectrum to turn light to electricity: UC Riverside researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient July 27th, 2015

Possible Futures

Nanofiltration Membrane Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Nanozirconia Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Self-Healing Nano Anti-rust Coatings Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Nano Spray Instrument Market 2015 - Global Industry Survey, Analysis, Size, Share, Outlook and Forecast to 2020 July 31st, 2015

Academic/Education

Pakistani Students Who Survived Terror Attack to Attend Weeklong “NanoDiscovery Institute” at SUNY Poly CNSE in Albany July 29th, 2015

Deben reports on the use of their CT500 in the X-ray microtomography laboratory at La Trobe University, Melbourne, Australia July 22nd, 2015

JPK reports on the use of SPM in the Messersmith Group at UC Berkeley looking at biologically inspired polymer adhesives. July 21st, 2015

Renishaw adds Raman analysis to Scanning Electron Microscopy at the University of Sydney, Australia July 9th, 2015

Chip Technology

This could replace your silicon computer chips: A new semiconductor material made from black phosphorus may be a candidate to replace silicon in future tech July 30th, 2015

March 2016; 6th Int'l Conference on Nanostructures in Iran July 29th, 2015

Meet the high-performance single-molecule diode: Major milestone in molecular electronics scored by Berkeley Lab and Columbia University team July 29th, 2015

Short wavelength plasmons observed in nanotubes: Berkeley Lab researchers create Ludinger liquid plasmons in metallic SWNTs July 28th, 2015

Announcements

Self-assembling, biomimetic membranes may aid water filtration August 1st, 2015

Transparent, electrically conductive network of encapsulated silver nanowires: A novel electrode for optoelectronics August 1st, 2015

Harris & Harris Group Portfolio Company, HZO, Announces Partnerships with Dell and Motorola August 1st, 2015

Advances and Applications in Biosensing, Sensor Power, and Sensor R&D to be Covered at Sensors Global Summit August 1st, 2015

Energy

Transparent, electrically conductive network of encapsulated silver nanowires: A novel electrode for optoelectronics August 1st, 2015

Springer and Tsinghua University Press present the second Nano Research Award: Paul Alivisatos of the University of California Berkeley receives the honor for outstanding contributions in nanoscience July 30th, 2015

Controlling Dynamic Behavior of Carbon Nanosheets in Structures Made Possible July 30th, 2015

March 2016; 6th Int'l Conference on Nanostructures in Iran July 29th, 2015

Battery Technology/Capacitors/Generators/Piezoelectrics/Thermoelectrics/Energy storage

Sol-gel capacitor dielectric offers record-high energy storage July 30th, 2015

Stretching the limits on conducting wires July 25th, 2015

BESSTECH’s Innovative Battery Technology is Highlighted During Featured Presentations at SEMICON West 2015: CEO Fernando Gómez-Baquero delivers invited remarks at the event’s Silicon Innovation Forum and Semiconductor Technology Symposium July 16th, 2015

Molecular fuel cell catalysts hold promise for efficient energy storage July 16th, 2015

Solar/Photovoltaic

Transparent, electrically conductive network of encapsulated silver nanowires: A novel electrode for optoelectronics August 1st, 2015

Springer and Tsinghua University Press present the second Nano Research Award: Paul Alivisatos of the University of California Berkeley receives the honor for outstanding contributions in nanoscience July 30th, 2015

Reshaping the solar spectrum to turn light to electricity: UC Riverside researchers find a way to use the infrared region of the sun's spectrum to make solar cells more efficient July 27th, 2015

Rice University finding could lead to cheap, efficient metal-based solar cells: Plasmonics study suggests how to maximize production of 'hot electrons' July 22nd, 2015

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



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project