Corporate Banner
Satellite Banner
Scientific Community
Become a Member | Sign in
Home>News>This Article

Anasys' NIST Users Report on New AFM-IR Nanoscale Chemical Imaging Method

Published: Thursday, July 25, 2013
Last Updated: Wednesday, July 24, 2013
Bookmark and Share
New application for AFM-IR to study in NIST publication "Tech Beat."

Anasys Instruments has announced a new application for AFM-IR to study as reported by research scientists in NIST publication "Tech Beat."

Researchers from the National Institute of Standards and Technology (NIST) and the University of Maryland have shown how to make nanoscale measurements of critical properties of plasmonic nanomaterials-the specially engineered nanostructures that modify the interaction of light and matter for a variety of applications, including sensors, cloaking (invisibility), photovoltaics and therapeutics.

Their technique is one of the few that allows researchers to make actual physical measurements of these materials at the nanoscale without affecting the nanomaterial's function.

Plasmonic nanomaterials contain specially engineered conducting nanoscale structures that can enhance the interaction between light and an adjacent material, and the shape and size of such nanostructures can be adjusted to tune these interactions.

Theoretical calculations are frequently used to understand and predict the optical properties of plasmonic nanomaterials, but few experimental techniques are available to study them in detail.

Researchers need to be able to measure the optical properties of individual structures and how each interacts with surrounding materials directly in a way that doesn't affect how the structure functions.

"We want to maximize the sensitivity of these resonator arrays and study their properties," says lead researcher Dr Andrea Centrone. "In order to do that, we needed an experimental technique that we could use to verify theory and to understand the influence of nanofabrication defects that are typically found in real samples. Our technique has the advantage of being extremely sensitive spatially and chemically, and the results are straightforward to interpret."

The research team turned to photothermal induced resonance (PTIR), an emerging chemically specific materials analysis technique, and showed it can be used to image the response of plasmonic nanomaterials excited by infrared (IR) light with nanometer-scale resolution.

The team used PTIR, also known as AFM-IR, to image the absorbed energy in ring-shaped plasmonic resonators. The nanoscale resonators focus the incoming IR light within the rings' gaps to create "hot spots" where the light absorption is enhanced, which makes for more sensitive chemical identification.

For the first time, the researchers precisely quantified the absorption in the hot spots and showed that for the samples under investigation, it is approximately 30 times greater than areas away from the resonators.

The researchers also showed that plasmonic materials can be used to increase the sensitivity of IR and PTIR spectroscopy for chemical analysis by enhancing the local light intensity, and thereby, the spectroscopic signal.

Their work further demonstrated the versatility of PTIR as a measurement tool that allows simultaneous measurement of a nanomaterial's shape, size, and chemical composition-the three characteristics that determine a nanomaterial's properties.

Unlike many other methods for probing materials at the nanoscale, PTIR doesn't interfere with the material under investigation; it doesn't require the researcher to have prior knowledge about the material's optical properties or geometry; and it returns data that is more easily interpretable than other techniques that require separating the response of the sample from response of the probe.

Further Information
Access to this exclusive content is for Technology Networks Premium members only.

Join Technology Networks Premium for free access to:

  • Exclusive articles
  • Presentations from international conferences
  • Over 2,800+ scientific posters on ePosters
  • More than 4,000+ scientific videos on LabTube
  • 35 community eNewsletters

Sign In

Forgotten your details? Click Here
If you are not a member you can join here

*Please note: By logging into you agree to accept the use of cookies. To find out more about the cookies we use and how to delete them, see our privacy policy.

Related Content

New NIST AFM-IR Publication has Catalysis Research Implications
Anasys Instruments reports on a new publication from their nanoIR users at NIST which assess the chemical composition of a metal-organic framework with nanoscale resolution.
Tuesday, March 25, 2014
Inventor of AFM-IR Technique to Receive Ernst Abbe Memorial Award
Professor Alexandre Dazzi to receive the award for pioneering field of nanoscale IR Spectroscopy.
Wednesday, March 19, 2014
French Researchers to Identify Best Microbes for Biofuel Production
Scientists used atomic force microscopy combined with infrared spectroscopy.
Wednesday, February 19, 2014
Purdue University Researchers Use Nanoscale IR Spectroscopy via AFM-IR
Utilizing this technique has provided key insights into drug-polymer blends.
Friday, May 11, 2012
Invited Award Symposium Presentation Nanoscale IR Spectroscopy at Pittcon 2012
Anasys Instruments announced that Dr. Bruce Chase is presenting an invited talk entitled "Structure and Orientation in Electrospun Nanofibers", as part of the Organized Contributed Session on Analytical Applications of Broadly Tunable Lasers.
Thursday, March 08, 2012
Anasys Instruments Receives Microscopy Today’s 2011 Innovation Award
AFM-IR system has been recognized by Microscopy Today in the receipt of the 2011 Innovation Award.
Thursday, August 18, 2011
Scientific News
Closing the Loop on an HIV Escape Mechanism
Research team finds that protein motions regulate virus infectivity.
New Analysis Technique for Chiral Activity in Molecules
Professor Hyunwoo Kim of the Chemistry Department and his research team have developed a technique that can easily analyze the optical activity of charged compounds by using nuclear magnetic resonance (NMR) spectroscopy.
Miniaturizable Magnetic Resonance
Microscopic gem the key to new development in magnetic lab-on-a-chip technology.
“Golden Window” in Deep Brain Imaging Opened
The neuroscience community is saluting the creation of a “Golden Window” for deep brain imaging by researchers at The City College of New York led by biomedical engineer Lingyan Shi.
How Viruses Commandeer Human Proteins
Researchers have produced the first image of an important human protein as it binds with ribonucleic acid (RNA), a discovery that could offer clues to how some viruses, including HIV, control expression of their genetic material.
Human Dark Proteome Initiative Launched
Group to focus on advancing research on intrinsically disordered proteins to better understand catastrophic diseases.
Clearest Ever Images of Enzyme that Plays Key Roles in Aging, Cancer
UCLA-led research on telomerase could lead to new strategies for treating disease
Analyzing Protein Structures in Their Native Environment
Enhanced-sensitivity NMR could reveal new clues to how proteins fold.
Proteins with ALS, Cancer Role Do Not Assume a Regular Shape
Our cells contain proteins, essential to functions like protein creation and DNA repair but also involved in forms of ALS and cancer, that never take a characteristic shape, a new study shows.
Studying Bowel Disease With Raman Spectroscopy
inVia confocal Raman microscope used in the study of various childhood diseases.

Skyscraper Banner
Go to LabTube
Go to eposters
Access to the latest scientific news
Exclusive articles
Upload and share your posters on ePosters
Latest presentations and webinars
View a library of 1,800+ scientific and medical posters
2,800+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
4,000+ scientific videos