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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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 Urheber:
Shusteff, M., Autor
Burg, T. P.1, Autor           
Manalis, S. R., Autor
Affiliations:
1Research Group of Biological Micro- and Nanotechnology, MPI for biophysical chemistry, Max Planck Society, ou_578602              

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 Zusammenfassung: 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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Sprache(n): eng - English
 Datum: 2006-092006-10
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1119/1.2335475
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Titel: American Journal of Physics
Genre der Quelle: Zeitschrift
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Seiten: - Band / Heft: 74 (10) Artikelnummer: - Start- / Endseite: 873 - 879 Identifikator: -