New Hybrid Microscope Offers Unparalleled Capabilities
News Aug 12, 2015
The Hybrid Photonic Mode-Synthesizing Atomic Force Microscope is unique, according to principal investigator Ali Passian of ORNL’s Quantum Information System group. As a hybrid, the instrument combines the disciplines of nanospectroscopy and nanomechanical microscopy.
“Our microscope offers a non-invasive rapid method to explore materials simultaneously for their chemical and physical properties,” Passian said. “It allows researchers to study the surface and subsurface of synthetic and biological samples, which is a capability that until now didn’t exist.”
ORNL’s instrument retains all of the advantages of an atomic force microscope while simultaneously offering the potential for discoveries through its high resolution and subsurface spectroscopic capabilities.
“The originality of the instrument and technique lies in its ability to provide information about a material’s chemical composition in the broad infrared spectrum of the chemical composition while showing the morphology of a material’s interior and exterior with nanoscale – a billionth of a meter – resolution,” Passian said.
Researchers will be able to study samples ranging from engineered nanoparticles and nanostructures to naturally occurring biological polymers, tissues and plant cells.
The first application as part of DOE’s BioEnergy Science Center was in the examination of plant cell walls under several treatments to provide submicron characterization. The plant cell wall is a layered nanostructure of biopolymers such as cellulose. Scientists want to convert such biopolymers to free the useful sugars and release energy.
An earlier instrument, also invented at ORNL, provided imaging of poplar cell wall structures that yielded unprecedented topological information, advancing fundamental research in sustainable biofuels.
Because of this new instrument’s impressive capabilities, the researcher team envisions broad applications.
“An urgent need exists for new platforms that can tackle the challenges of subsurface and chemical characterization at the nanometer scale,” said co-author Rubye Farahi. “Hybrid approaches such as ours bring together multiple capabilities, in this case, spectroscopy and high-resolution microscopy.”
Looking inside, the hybrid microscope consists of a photonic module that is incorporated into a mode-synthesizing atomic force microscope. The modular aspect of the system makes it possible to accommodate various radiation sources such as tunable lasers and non-coherent monochromatic or polychromatic sources.
The Smoke Screen - Sensor Arms Race is OnNews
The military uses smoke grenades in dangerous situations to provide cover for people and tanks on the move. But increasingly, sensors can now go beyond the visible range into the infrared (IR) region of the spectrum. Today, researchers report developing a new kind of smoke that obscures both visible and IR detection.READ MORE
Catalyst Can Degrade Alzheimer's-Related Amyloid Peptide Under Near-Infrared LightNews
A new, biocompatible photooxygenation catalyst that can selectively oxygenate and degrade the pathogenic aggregation of Alzheimer's disease (AD)-related amyloid-β peptide (Αβ) under near-infrared (NIR) light irradiation has been developed.READ MORE
Mediterranean Diet Could Improve Postmenopausal HealthNews
The heart-healthy Mediterranean diet also appears to be good for an older woman's bones and muscles, a new study of postmenopausal women in Brazil finds.READ MORE
Comments | 0 ADD COMMENT
World Congress on Pathology and Laboratory Medicine
Sep 10 - Sep 11, 2018
World Congress on Plant Science and Molecular Biology
Sep 12 - Sep 13, 2018
10th International Conference on Mass Spectrometry and Chromatography
Oct 08 - Oct 09, 2018