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Nanotechnology Spotlight

Behind the buzz and beyond the hype:
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Showing Spotlights 1 - 8 of 91 in category Microscopy, Spectroscopy, Imaging (newest first):


Studying phase transformations of a single nanoparticle at the atomic level

nanoparticleCatalytic nanoparticles play a crucial role in accelerating chemical reactions by offering their active sites and surfaces. Fine-tuning their surface structure during synthesis and phase transformations can enhance their catalytic activity and durability by manifolds. However, control and feedback on the synthesis/transformation studies demand characterization techniques that can provide structural and compositional information on the atomic level.

Posted: Nov 24th, 2015

Gold-manganese nanoparticles for targeted diagnostic and imaging

nanoparticle_contrast_agentImagine the possibility of non-invasive, non-radiation based Magnetic Resonance Imaging (MRI) in combating cardiac disease. Researchers are developing a process that would use nanotechnology in a novel, targeted approach that would allow MRIs to be more descriptive and brighter, and to target specific organs. By using nanoparticle-based MRI positive contrast agents, you can specifically target different tissues or organs, you can control active component loading, and you can generate bright or hyperintense anatomical view of the tissue.

Posted: Nov 11th, 2015

Measuring femtoscale displacement for photoacoustic spectroscopy

microcantileversThe development of nanoscale devices and applications requires ultra-sensitive sensing systems that can offer not only atomic resolution imaging but also sub nanometer scale displacement detection, zeptogram level mass sensing, or single bio-molecular sensing. Researchers have now developed a novel sensor that addresses some of the shortcomings that have plagued existing optical scanning systems , namely size, complexity, and cost. This sensing technology is completely electrical and capable of sensing very small displacement as low as in the femtometer range.

Posted: Sep 30th, 2015

Non-destructive subsurface imaging of carbon nanotubes in polymer composites

carbon_nanotubesResearchers report a non-destructive and high throughput 3D imaging of carbon nanotubes (CNTs) embedded in polymer matrix via Scanning Electron Microscopy (SEM). While have been several open questions remaining for SEM subsurface imaging of CNTs, this new findings clarify these issues and help establish SEM subsurface imaging as a useful and facile method to provide quantitative 3D information on CNT dispersions in polymer composites.

Posted: Feb 18th, 2015

Ultraflat transfer method for graphene surface force balance

grapheneThe surface force balance (SFB) provides measurements of surface and colloidal forces in liquids such as electrostatic surface forces, van der Waals forces, and solvation forces. Until now, the SFB required mica sheets as the substrate for measurements. This was the only material available in an atomically smooth state over centimeter-scale areas as well as being optically transparent as required for the optical interferometry. By replacing the mica sheets with graphene, electrically conducting and atomically smooth surfaces for the measurement of surface forces have now been created.

Posted: Dec 10th, 2014

Direct chemical contrast in STM imaging becomes available with new technique

nanoclustersResearchers have demonstrated a new imaging technique that is a marriage between two powerful methods and it promises simultaneous spatial and elemental information of the samples down to the atomic scale. By combining scanning tunneling microscopy (STM) with synchrotron X-ray microscopy, there is now an instrument (SX-STM) that has the potential to perform all the applications of STM and X-rays in a single setting at the ultimate atomic limit.

Posted: Oct 27th, 2014

AFM and Raman spectroscopy-correlated imaging and tip enhanced Raman scattering

afmThe desire to identify materials and their properties to understand complex systems and better engineer their functions has been driving scanning probe microscopies since their inception. Both atomic force microscopy (AFM) and Raman spectroscopy are techniques used to gather information about the surface properties and chemical information of a sample. There are many reasons to combine these two technologies, and this application note discusses both the complementary information gained from the techniques and how a researcher having access to a combined system can benefit from the additional information available.

Posted: Mar 6th, 2014

Integrated optical and AFM metrology

AFM_metrologySurface metrology and characterization is ever more critical for overall product performance in wide ranging applications across the semi-conductor, LED, data storage, medical and automotive industries. 3D optical microscopes are among the fastest and most accurate imaging systems on the market today, and are employed in these industries for rapid and precise process monitoring, product development, and research. However, there are instances where they have performance limitations and the benefits of scanning probe/atomic force microscopy provide a clear advantage.

Posted: Feb 6th, 2014