Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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

Getting electrons to move in a semiconductor: Gallium oxide shows high electron mobility, making it promising for better and cheaper devices April 24th, 2018

JPK reports on research of the Mestroni Lab at the University of Colorado Denver which use the JPK NanoWizard® AFM to help in the characterization of cardiomyopathies April 24th, 2018

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

Remote-control shoots laser at nano-gold to turn on cancer-killing immune cells April 20th, 2018

Sensors

Salt boosts creation of 2-D materials: Rice University scientists show how salt lowers reaction temperatures to make novel materials April 18th, 2018

Doing the nano-shimmy: New device modulates light and amplifies tiny signals April 12th, 2018

Scientists Use Nanotechnology to Detect Molecular Biomarker for Osteoarthritis March 13th, 2018

Graphene on toast, anyone? Rice University scientists create patterned graphene onto food, paper, cloth, cardboard February 13th, 2018

Discoveries

Getting electrons to move in a semiconductor: Gallium oxide shows high electron mobility, making it promising for better and cheaper devices April 24th, 2018

JPK reports on research of the Mestroni Lab at the University of Colorado Denver which use the JPK NanoWizard® AFM to help in the characterization of cardiomyopathies April 24th, 2018

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

Remote-control shoots laser at nano-gold to turn on cancer-killing immune cells April 20th, 2018

Announcements

Getting electrons to move in a semiconductor: Gallium oxide shows high electron mobility, making it promising for better and cheaper devices April 24th, 2018

JPK reports on research of the Mestroni Lab at the University of Colorado Denver which use the JPK NanoWizard® AFM to help in the characterization of cardiomyopathies April 24th, 2018

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

Remote-control shoots laser at nano-gold to turn on cancer-killing immune cells April 20th, 2018

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

Getting electrons to move in a semiconductor: Gallium oxide shows high electron mobility, making it promising for better and cheaper devices April 24th, 2018

JPK reports on research of the Mestroni Lab at the University of Colorado Denver which use the JPK NanoWizard® AFM to help in the characterization of cardiomyopathies April 24th, 2018

Organic solar cells reach record efficiency, benchmark for commercialization April 23rd, 2018

Remote-control shoots laser at nano-gold to turn on cancer-killing immune cells April 20th, 2018

Tools

JPK reports on research of the Mestroni Lab at the University of Colorado Denver which use the JPK NanoWizard® AFM to help in the characterization of cardiomyopathies April 24th, 2018

Observing biological nanotransporters: Chemistry April 19th, 2018

Grand Opening of UC Irvine Materials Research Institute (IMRI) to Spotlight JEOL Center for Nanoscale Solutions: Renowned Materials Scientists to Present at the 1st International Symposium on Advanced Microscopy and Spectroscopy (ISAMS) April 18th, 2018

Individual impurity atoms detectable in graphene April 18th, 2018

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project