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atomic force microscopy


Posted by: computer science topics
Created at: Thursday 10th of June 2010 10:19:44 AM
Last Edited Or Replied at :Thursday 10th of June 2010 10:19:44 AM
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al line by line, have also been used to fabricate nanostructures. But the process is slow, a drawback that has limited it largely to the research lab.

The new version of AFM uses a probe that scans materials 100 times faster than existing AFM. Whatâ„¢s more, the technology can simultaneously measure characteristics such as stiffness and stickiness while imaging the material. That type of information can, for example, help engineers design computer chips that use new nanomaterials, says Levent Degertekin, lead researcher on the project and professor of mechanical engineering at Georgia T..................[:=> Show Contents <=:]



atomic force microscopy full report


Posted by: project report tiger
Created at: Tuesday 16th of February 2010 07:36:40 PM
Last Edited Or Replied at :Tuesday 16th of February 2010 07:36:40 PM
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albumen on silicon (sample prepared by Sie-Ting Wong of Abbott Laboratories).
AFM can also image the softness of a sample by pressing the cantilever into it at each point in a scan. The scanner raises the sample or lowers the cantilever by a preset amount, the modulation amplitude (usually 1-10 nm). In response, the cantilever deflects an amount dependent on the softness of the sample: the harder the sample, the more the cantilever deflects (figure 15).
Figure 16 shows an image of bovine serum albumen (BSA) on silicon. A number of bumps appear in the topography image, each presumably cor..................[:=> Show Contents <=:]



nano sensors to detect heart attack


Posted by: cool_akshy
Created at: Wednesday 01st of December 2010 12:41:23 AM
Last Edited Or Replied at :Wednesday 01st of December 2010 07:04:38 PM
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pleaseeeee send me the full ppt of the topic plzzzzzz i hav 2 give a seminars in my coll plz help ..................[:=> Show Contents <=:]



Robotic sensors - Health careBiochipFractal RobotAtomic force Microscopy


Posted by: jitendrasabat
Created at: Sunday 29th of August 2010 09:35:59 AM
Last Edited Or Replied at :Wednesday 22nd of September 2010 04:28:22 AM
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9.TELE ROBOTICS
10.BIO SENSORS..................[:=> Show Contents <=:]



visualization of laser confocal microscopy datasets full report


Posted by: computer science topics
Created at: Thursday 17th of June 2010 02:43:31 AM
Last Edited Or Replied at :Thursday 17th of June 2010 02:43:31 AM
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nd versatility of the system allows fast convenient interactive operation with large datasets on small computers workstation or PC By testing dierent datasets we have been able to signicantly improve the performance of under standing the internal structure of LCM data Most impor tant we have been able to show static and dynamic struc tures of cells never seen before and allowing signicant in sight in the cell movement process Therefore we regard our system as a universal tool for the visualization such data


read full report
http://www.cs.unc.edu/~taylorr/Confocal_vis/sakas_etal_vis1996_..................[:=> Show Contents <=:]



atomic force microscopy


Posted by: computer science topics
Created at: Thursday 10th of June 2010 10:19:44 AM
Last Edited Or Replied at :Thursday 10th of June 2010 10:19:44 AM
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a laser spot reflected from the top surface of the cantilever into an array of photodiodes. Other methods that are used include optical interferometry, capacitive sensing or piezoresistive AFM cantilevers. These cantilevers are fabricated with piezoresistive elements that act as a strain gauge. Using a Wheatstone bridge, strain in the AFM cantilever due to deflection can be measured, but this method is not as sensitive as laser deflection or interferometry.

If the tip was scanned at a constant height, a risk would exist that the tip collides with the surface, causing damage. Hence, in most..................[:=> Show Contents <=:]



atomic force microscopy full report


Posted by: project report tiger
Created at: Tuesday 16th of February 2010 07:36:40 PM
Last Edited Or Replied at :Tuesday 16th of February 2010 07:36:40 PM
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of a spring:
This shows that a cantilever can have both low spring constant and high resonant frequency if it has a small mass. Therefore AFM cantilevers tend to be very small. Commercial vendors manufacture almost all AFM cantilevers by microlithography processes similar to those used to make computer chips.
INEXPENSIVE AND REASONABLY SHARP TIPS BY MICROMACHINING
Force microscopists generally use one of three types of tip.
The normal tip (figure 8a; is a 3 µm tall pyramid with ~30 nm end radius.)
The electron-beam-deposited (EBD) tip or supertip (figure 8b); improves on this..................[:=> Show Contents <=:]



The Atomic Battery


Posted by: mechanical wiki
Created at: Thursday 03rd of September 2009 12:36:02 PM
Last Edited Or Replied at :Thursday 25th of August 2011 11:48:50 PM
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iversity, is also targeting the MEMS power market. The Radioisotope-Powered Piezoelectric Generator, due in prototype form in a few years, will combine a betavoltaics cell with a tritium-powered electromechanical cantilever device first demonstrated in 2002.

Amit Lal, one of the Cornell researchers, offers both praise and cautious skepticism about the DEC Cell. While he's impressed with the power output from the DEC Cell, he said that there are still issues with power leakage. To avoid those potential leakage problems, Cornell is using a slightly larger-scale wafer design. They're also plan..................[:=> Show Contents <=:]



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