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  Measuring Boltzmann’s constant with a low-cost atomic force microscope: An undergraduate experiment.

Shusteff, M., Burg, T. P., & Manalis, S. R. (2006). Measuring Boltzmann’s constant with a low-cost atomic force microscope: An undergraduate experiment. American Journal of Physics, 74(10), 873-879. doi:10.1119/1.2335475.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-9C9A-A Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-C4F1-6
Genre: Journal Article

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1851274.pdf (Publisher version), 736KB
 
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 Creators:
Shusteff, M., Author
Burg, T. P.1, Author              
Manalis, S. R., Author
Affiliations:
1Research Group of Biological Micro- and Nanotechnology, MPI for biophysical chemistry, Max Planck Society, ou_578602              

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 Abstract: We discuss a low-cost atomic force microscope that we have designed and built for use in an undergraduate teaching laboratory. This microscope gives students hands-on access to nano-Newton force measurements and subangstrom position measurements. The apparatus relies mainly on off-the-shelf components and utilizes an interferometric position sensor known as the interdigitated (ID) cantilever to obtain high resolution. The mechanical properties of the ID readout enable a robust and open design that makes it possible for students to directly control it. Its pedagogical advantage is that students interact with a complete instrument system and learn measurement principles in context. One undergraduate experiment enabled by this apparatus is a measurement of Boltzmann’s constant, which is done by recording the thermal noise power spectrum of a microfabricated cantilever beam. In addition to gaining an appreciation of the lower limits of position and force measurements, students learn to apply numerous concepts such as digital sampling, Fourier-domain analysis, noise sources, and error propagation.

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Language(s): eng - English
 Dates: 2006-092006-10
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1119/1.2335475
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Title: American Journal of Physics
Source Genre: Journal
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Pages: - Volume / Issue: 74 (10) Sequence Number: - Start / End Page: 873 - 879 Identifier: -