2024-03-29T08:52:17Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/182092018-08-22T12:15:26Zcom_10261_36com_10261_4com_10261_25com_10261_1col_10261_289col_10261_278
DIGITAL.CSIC
author
Ramos Vega, Daniel
author
Tamayo de Miguel, Francisco Javier
author
Mertens, Johann
author
Calleja, Montserrat
author
Zaballos, Ángel
2009-10-30T11:43:18Z
2009-10-30T11:43:18Z
2006-11-30
Journal of Applied Physics 100, 106105 (2006)
0021-8979
http://hdl.handle.net/10261/18209
10.1063/1.2370507
Resonant microcantilevers are being actively investigated as sensitive mass sensors for biological detection. By performing experiments of adsorption of the bacteria Escherichia coli on singly clamped microcantilevers, we demonstrate that the effect of the added mass is not the only and may not be the main origin of the response of these sensors. The experiments show that the magnitude and sign of resonance frequency shift both depend critically on the distribution of the adsorbed bacterial cells on the cantilever. We relate this behavior to the added mass that shifts the resonance to lower frequencies and the higher effective flexural rigidity of the cantilever due to the bacteria stiffness that shifts the resonance to higher frequencies. Both effects can be uncoupled by positioning the cells where each effect dominates, near the free cantilever end for measuring the added mass or near the clamping for measuring the increase of flexural rigidity.
eng
openAccess
Cellular biophysics
Micromechanical
Resonators
Microorganisms
Adsorption
Cantilevers
Microsensors
Biological techniques
Nanotechnology
Biomechanics
Biosensors
Origin of the response of nanomechanical resonators to bacteria adsorption
artículo
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https://digital.csic.es/bitstream/10261/18209/1/Ramos%2c%20D.%20et%20al%20J.Appl.%20Phys._100_2006.pdf
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Ramos, D. et al J.Appl. Phys._100_2006.pdf
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https://digital.csic.es/bitstream/10261/18209/4/Ramos%2c%20D.%20et%20al%20J.Appl.%20Phys._100_2006.pdf.txt
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Ramos, D. et al J.Appl. Phys._100_2006.pdf.txt