Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Microscopic fountain pen adds new functionality to AFM Microscopy

‘Cantilever of an AFM microscope (tip not shown) is made hollow to be able to fill it with mercury and add a sensitive chemical sensor to the AFM’
‘Cantilever of an AFM microscope (tip not shown) is made hollow to be able to fill it with mercury and add a sensitive chemical sensor to the AFM’

Abstract:
The Atomic Force Microscope (AFM), which uses a fine-tipped probe to scan surfaces at the atomic scale, will soon be augmented with a chemical sensor. This involves the use of a hollow AFM cantilever, through which a liquid - in this case mercury - is passed under pressure. The droplet of mercury at the tip acts as a sensor. This microscopic fountain pen was developed by researchers at the University of Twente's MESA+ Institute for Nanotechnology.

Microscopic fountain pen adds new functionality to AFM Microscopy

Enschede, Netherlands | Posted on January 16th, 2014

An AFM's cantilever has a fine tip that can be used to map surfaces at the nanoscale.
The movements of the tip are monitored using laser light reflected from the cantilever. If you could manufacture a hollow cantilever and pass a liquid through it, as happens in a fountain pen, then you could kill two birds with one stone. In addition to mapping surfaces, you could also use it to make highly localized measurements of the concentration of specific chemicals. This concept was the brainchild of ​​Dr Peter Schön, a researcher who leads the "Enabling Technologies" Strategic Research Orientation at MESA+

Mercury

The liquid selected was mercury, as it has the ideal properties for this purpose, such as an extremely clean surface. The researchers have created a cantilever with a microscopic tube running through it. The tube's lining has special mechanical properties, to contain the mercury as it is pumped through under high pressure (6 bar). Using this system, it has proved possible to create a perfect droplet at the tip. The droplet itself is the sensor, moreover it can easily be replaced in situ by a new sensor - the next droplet. It is also important that electrical current is only conducted through the mercury in the microscopic tube and not via parts of the cantilever, so as not to affect the measurement result. This goal, too, was successfully achieved.

Dual function

A sensor of such exquisite sensitivity can be used to measure concentrations of specific chemicals on biomolecules and biomembranes, for example. It can also be used in combination with AFM, to make highly localized measurements of corrosion while at the same time gathering other information about the surface in question. This makes for a particularly powerful combination of measurement methods.

Details of the "fountain pen's" mechanism of action were recently published in "Analytical Chemistry". The researchers are now focusing on ways of combining this technique with an AFM tip. They are also developing a technique for efficiently releasing the used mercury droplet to make way for a "clean" sensor.

In the course of this study Dr Schön cooperated with micromechanics experts from the Transducers Science and Technology group (which is also part of MESA+) and with a spinoff company, SmartTip (www.smarttip.nl)

####

For more information, please click here

Contacts:
Wiebe van der Veen
+31612185692

Copyright © AlphaGalileo

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

Tissue regeneration using anti-inflammatory nanomolecules August 22nd, 2014

A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy August 22nd, 2014

Ultra-short pulse lasers & Positioning August 21st, 2014

Malvern’s Dr Alan Rawle talks TLAs in plenary lecture at Particulate Systems Analysis conference August 21st, 2014

Sensors

Newly-Developed Nanobiosensor Quickly Diagnoses Cancer August 20th, 2014

Graphene rubber bands could stretch limits of current healthcare, new research finds August 19th, 2014

Iranian Scientists Stabilize Protein on Highly Stable Electrode Surface August 14th, 2014

Non-Enzyme Nanosensors Quickly Measure Blood Sugar August 12th, 2014

Discoveries

Tissue regeneration using anti-inflammatory nanomolecules August 22nd, 2014

A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy August 22nd, 2014

Shaping the Future of Nanocrystals: Berkeley Lab Researchers Obtain First Direct Observation of Facet Formation in Nanocubes August 21st, 2014

Water window imaging opportunity: A new theoretical study elucidates mechanisms that could help in producing coherent radiations, ultimately promoting high-contrast imaging of biological samples August 21st, 2014

Announcements

Tissue regeneration using anti-inflammatory nanomolecules August 22nd, 2014

A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy August 22nd, 2014

Malvern’s Dr Alan Rawle talks TLAs in plenary lecture at Particulate Systems Analysis conference August 21st, 2014

Water window imaging opportunity: A new theoretical study elucidates mechanisms that could help in producing coherent radiations, ultimately promoting high-contrast imaging of biological samples August 21st, 2014

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals

Tissue regeneration using anti-inflammatory nanomolecules August 22nd, 2014

A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy August 22nd, 2014

Shaping the Future of Nanocrystals: Berkeley Lab Researchers Obtain First Direct Observation of Facet Formation in Nanocubes August 21st, 2014

Water window imaging opportunity: A new theoretical study elucidates mechanisms that could help in producing coherent radiations, ultimately promoting high-contrast imaging of biological samples August 21st, 2014

Tools

A breakthrough in imaging gold nanoparticles to atomic resolution by electron microscopy August 22nd, 2014

Hiden Release New Gas Analysis Catalogue August 21st, 2014

Wyatt Technology’s 24th International Light Scattering Colloquium to Highlight Developments in Applications and Characterization of Nanoparticles August 21st, 2014

Ultra-short pulse lasers & Positioning August 21st, 2014

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







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE