Page 4 - Shimadzu SPM-8100FM

Differences From Existing SPM/AFM Examples of Observations in Liquids

Atomic Resolution Observations in Solution In Liquid

Observations were made of the arrangement of atoms
on a NaCl surface in a saturated aqueous solution.
Molecular Structure of Proteins 2)
Atoms hidden by noise in existing AFM observations
Egg-white lysozyme was observed in a saturated aqueous can not be observed using the existing AFM, while four
(AM method, left) are clearly visible when the FM
solution. Protein molecules (the circles in the figure at protein molecules were observed using HR-SPM and the
method (right) is used. The FM method provides true
left) can be observed within the surface unit cell (the images are consistent with the model image shown in the
atomic resolution.
square in the figure at right). The inside of the unit cell figure at right.
2.0×2.0 nm
AM Method FM Method
11.1 nm (110)
Pt Catalyst Particles Observation in Air 1)
3.8 nm
Pt catalyst particles in a TiO2 substrate were identified, and
the surface potential was measured using a KPFM. Pt
-0.80 0.25 particles several nm in size were observed in the exchange
[V] [V]
of charges with the substrate. In the figure on the right, the
red circles indicate positive potential, and the blue circles 4 3 helices 5 nm
indicate negative potential. It is evident that the resolution Model of the Crystalline Structure of the Surface of Lysozyme (110)
50.00 nm 100.00 x 100.00 nm 50.00 nm 100.00 x 100.00 nm
has been dramatically improved, even for a KPFM. 50.00
AM Method FM Method
nm 100.00 x 100.00 nm 50.00 nm 100.00 x 100.00 nm Mixed Crystalline Structures
KPFM: Kelvin Probe Force Microscope
Note: KPFM functionality is available on a special order basis.
2.82 A 5.64 A This illustrates the observation of
NaCl MgCl2
epitaxially-grown Na2MgCl4 crystals on a single
Examples of Observations in Air (Na, Mg)Cl? Na NaCl crystal surface in a mixed solution.
Cl
Because the crystalline structure can be
NaCl
3.99 A
observed, this technique can be used to identify
In Air
the structure of mixed samples.
The Molecular Structural Arrangement of a Thin Film of Lead Phthalocyanine Crystals

These figures show phthalocyanine crystals, which are commonly used in organic light-emitting displays, and in
dye-sensitized solar cells. The four-leaf structure surrounding the metal atom at the center of the molecule can be clearly
observed.

Atomic Structure of a Calcite Cleavage Plane 3)

This is an atomic-resolution observation of

[421] surface structure in a liquid medium. Defects
Defect
in the calcite surface are evident in the figure
at left.
[421] [010]

[010]
All data on this page was obtained using
Sample : PbPc/MoS2 2.00 nm 8.00 × 8.00 nm 10.00 nm 21.00 × 21.00 nm the petri dish type solution cell (option).

SPM-8100FM
4 High Resolution Scanning Probe Microscope 5