Table 1 Spring constants of the six SiNW groups.

From: SiNWs Biophysically Regulate the Fates of Human Mesenchymal Stem Cells

 

L1 (μm)

D1 (nm)

KTheo,SiNW (mN/m)

D2 (μm)

KTheo,bundles (N/m)

KReal,bundles (N/m)

I

8.7 ± 0.4

162.3 ± 33.1

44.0 ± 31.0

3.3 ± 0.21

5,170 ± 470

1,200 ± 280

II

13.5 ± 0.4

170.6 ± 43.5

15.0 ± 13.0

3.8 ± 0.47

3,600 ± 390

960 ± 110

III

20.2 ± 2.2

174.7 ± 23.9

4.8 ± 1.1

4.2 ± 0.36

1,600 ± 265

810 ± 160

IV

25.9 ± 4.0

191.7 ± 34.4

3.3 ± 0.8

4.7 ± 0.82

808 ± 132

520 ± 110

V

34.0 ± 0.7

154.0 ± 25.1

0.6 ± 0.4

4.9 ± 0.49

602 ± 167

380 ± 70

VI

63.5 ± 3.5

190.1 ± 25.7

0.2 ± 0.08

5.1 ± 0.74

112 ± 32

86 ± 4

  1. L1: Average length of individual SiNWs; D1: Average diameter of individual SiNWs; D2: Average diameter of SiNW bundles; KTheo,SiNW: Theoretical spring constants of individual SiNWs computed by beam theory from L1 and D1; KTheo,bundles: Theoretical spring constants of SiNW bundles computed by beam theory from L1 and D2; KReal,bundles: Real spring constants of SiNW bundles measured by in situ TEM picoindentation.
Back to article page