AFM-based spherical indentation of a brush-coated soft material: Modeling the bottom effect

Ivan Argatov, Xiaoqing Jin*, Gennady Mishuris

*Awdur cyfatebol y gwaith hwn

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

32 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

It is a common practice in the atomic force microscopy (AFM)-based studies of living cells to differentiate them by values of the elastic (Young's) modulus, which is supposed to be an effective characteristic of the mechanical properties of a cell as a heterogeneous matter. The elastic response of a cell to AFM indentation is known to be affected by a relative distance from an AFM probe to a solid support on to which the cell is cultured. Besides this so-called bottom effect, AFM measurements may carry significant information regarding the effect of molecular brushes covering living cells. Here, we develop a mathematical model for determining the intrinsic effective Young's modulus of a single brush-coated cell from the force-indentation curve with the bottom effect taken into account. The mathematical model is illustrated with the example of AFM data on testing of an eukaryotic cell taken from the literature.

Iaith wreiddiolSaesneg
Tudalennau (o-i)4891-4898
Nifer y tudalennau8
CyfnodolynSoft Matter
Cyfrol19
Rhif cyhoeddi26
Dyddiad ar-lein cynnar20 Meh 2023
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 05 Gorff 2023

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