One of the key achievements of the nanotechnology era is the development of manufacturing technologies that can fabricate nanostructures formed from multiple materials. Such nanometer-scale integration of composite materials has enabled innovations in electronic devices, solar cells, and medical diagnostics.
While there have been significant breakthroughs in nano-manufacturing, there has been much less progress on measurement technologies that can provide information about nanostructures made from multiple integrated materials. Researchers at the University of Illinois Urbana-Champaign and Anasys Instruments Inc. now report new diagnostic tools that can support cutting-edge nano-manufacturing.
"We have used atomic force microscope based infrared spectroscopy (AFM-IR) to characterize polymer nanostructures and systems of integrated polymer nanostructures," said William King, the College of Engineering Bliss Professor in the Department of Mechanical Science and Engineering at the University of Illinois Urbana-Champaign. "In this research, we have been able to chemically analyze polymer lines as small as 100 nm. We can also clearly distinguish different nanopatterned polymers using their infrared absorption spectra as obtained by the AFM-IR technique."
In AFM-IR, a rapidly pulsed infrared (IR) laser is directed on upon a thin sample which absorbs the IR light and undergoes rapid thermomechanical expansion. An AFM tip in contact with the polymer nanostructure resonates in response to the expansion, and this resonance is measured by the AFM.
"While nanotechnologists have long been interested in the manufacturing of integrated nanostructures, they have been limited by the lack of tools that can identify material composition at the nanometer scale." said Craig Prater, co-author on the study and chief technology officer of Anasys Instruments Inc. "The AFM-IR technique offers the unique capability to simultaneously map the nanoscale morphology and perform chemical analysis at the nanoscale."
The paper is titled, "Nanometer-Scale Infrared Spectroscopy of Heterogeneous Polymer Nanostructures Fabricated by Tip-Based Nanofabrication," The authors are Jonathan Felts and William King of University of Illinois Urbana-Champaign and Kevin Kjoller, Michael Lo, and Craig Prater of Anasys Instruments Inc.
The research, published this month in ACS Nano, is available online at DOI:10.1021/nn302620f. The research was sponsored by the Defense Advanced Research Projects Agency, the Air Force Office of Scientific Research, and the Department of Energy.
University of Illinois College of Engineering: http://engineering.illinois.edu/
This press release was posted to serve as a topic for discussion. Please comment below. We try our best to only post press releases that are associated with peer reviewed scientific literature. Critical discussions of the research are appreciated. If you need help finding a link to the original article, please contact us on twitter or via e-mail.
Concentric circles of rocky hills and valleys in South Africa tell the story of a billion-year-old collapsed volcano
Pair of physicists bust a 350-year-old conundrum in a report that proposes a transfer of energy through a sound pulse causes clocks to synchronise
Scientists come up with an improved method for building tiny 3D structures out of strands of DNA.
It could be 2030 before the reactor being built in France starts making more energy than it uses. Meanwhile, China is investing heavily in its own project
A new study unpicks how the skin of the Texas horned lizard funnels water towards its mouth, and unveils a plastic replica that uses the same principles.
The weirdness of quantum teleportation offers a solution for getting information out of a black hole, should you have dropped something in there
A quiet village in eastern France is home to an unusual greenhouse.
Why I built Britain’s first elliptical pool table, for the game of LOOP, which will have its inaugural championship at the Port Eliot Festival later this month.
The international system of measurement has a weight problem—and a crystal ball could provide the solution.
Scientists have long wondered what's in the wispy cloud of gas floating in the space between the stars, absorbing starlight. Turns out it's a form of carbon named after architect Buckminster Fuller.