Biomedical Engineering Reference
In-Depth Information
Table A5. Sources of commercial biological reference samples. Right: image of NT-MDT DNA sample.
Reproduced with permission from NT-MDT.
Supplier and link
Biological
reference sample
1200 nm
1.8 nm
NT-MDT
Linearized
plasmid
DNA of
known
length
Asylum Research
DNA-coated
mica slides
0 nm
0 nm
0 nm
1200 nm
described but these are not commercially available [77]. Another commercial possibility is
an optical grating with controlled angles [735]. Some sources of commercial specimens
are given in Table A6.
A8
IC-AFM mode phase imaging
In intermittent-contact mode, the AFM can measure difference in viscoelastic properties
of mixed samples by phase imaging - see Section 3.2.3.2. A reference of polymer material
that has hard and soft regions is used to check the AFM response for this purpose, see
Table A7.
Table A6. Some commercial sources of references for lateral force calibration.
LFM reference sample
Supplier and link
Mikromasch
Triangles (silicon), top angle 70
8
Steps with sloped edges (silicon), slopes 54
8
Edmund Optics
Ruled diffraction gratings, with various angles
Table A7. Some commercial sources of phase imaging references.
Phase imaging reference sample
Supplier and link
Electron Microscopy Sciences
Polymer blend sample
Asylum Research
SEBS polymer sample
