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Time-resolved neurite mechanics by thermal fluctuation assessments.
Phys Biol
December 2015
Departamento de Física and SMAT-C, Universidad de Santiago de Chile, 9170124 Santiago, Chile.
In the absence of simple noninvasive measurements, the knowledge of temporal and spatial variations of axons mechanics remains scarce. By extending thermal fluctuation spectroscopy (TFS) to long protrusions, we determine the transverse amplitude thermal fluctuation spectra that allow direct and simultaneous access to three key mechanics parameters: axial tension, bending flexural rigidity and plasma membrane tension. To test our model, we use PC12 cell protrusions-a well-know biophysical model of axons-in order to simplify the biological system under scope.
View Article and Find Full Text PDFNano-Newton transverse force sensor using a vertical GaN nanowire based on the piezotronic effect.
Adv Mater
February 2013
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA.
Tension amplification in molecular brushes in solutions and on substrates.
J Phys Chem B
March 2009
P. N. Lebedev Physics Institute, Russian Academy of Sciences, Moscow, Russia.
Molecular bottle-brushes are highly branched macromolecules with side chains densely grafted to a long polymer backbone. The brush-like architecture allows focusing of the side-chain tension to the backbone and its amplification from the pico-Newton to nano-Newton range. The backbone tension depends on the overall molecular conformation and the surrounding environment.
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