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Why to choose MP-SPR?
True thickness from Å to µm:
The unique wide-angle scanning range ensures compatibility not only with thin layers
(from Ångströms) but also thicker layers (up to a few micrometers). Thickness and refractive index (RI) can be determined by fitting of curves
using Fresnel formalism. With additional wavelengths, a single solution can be found without prior knowledge of RI or thickness.
Fromnanoparticles to layers andmultilayers:
MP-SPR can serve as an at-line validation tool for thin filmdeposition processes
such as CVD and ALDmay it be for a single layer or for a stack. As there is no vacuum required, measurements can be done inminutes.
Real-time interactions:
MP-SPR is a real-time method and therefore allows for measurements of swelling of materials when
moving from dry to wet environment, material-solvent interactions, nanoparticle adsorption kinetics, protein resistance and more.
PAA polymer brushes swelling and collapse caused by pH and electric
potential change.
Real-time swelling of nanocellulose under different water vapour
concentrations.
Deg
0
20
40
0
2
1
0V
0V
-0.25V 0V
0.4V
0.4V
a
b
c
d
Time (min)
0.4V
-0.25V
PAA
PEDOT
Sensor
0.45
0.4
0.35
0.3
0.25
0.2
0.15
0.1
0.05
-0.05
0
0.151633
100
200
300
391
Time (min)
Deg
FC1 670 nm FC2 785 nm FC3 670 nm FC4 785 nm
Nanocellulose
Sensor
dry
100%
humidity
Self-assembly of polyelectrolyte multilayers is measured in real-time at two
wavelenghts (
670 nm
and
785 nm
). Twenty layers are formed
in-situ
. Thickness
for each layer can be determined. The true layer thickness is 2.5 nmper bilayer.
65.4885
66
66.5
67
67.5
68
68.5
69
69.5
70
70.5
70.7471
0.230883
25
50
75
100
125
150
187
Time (min)
Deg
654 nm (L2)
782 nm (L1)
Single monolayer of graphene was measured as 3.7Å thick at 670 nm
wavelength. Thin layers form a single peak in a MP-SPR scan.
Calculated 1
Calculated 2
Calculated 3
Calculated 4
6,25 FC0 670nm
4,62 FC0 670nm
1,27 FC2 670nm
6,61 FC2 670nm
0,95
0,15
0,2
0,25
0,3
0,35
0,4
0,45
0,5
0,55
0,6
0,65
0,7
0,75
0,8
0,85
0,9
50
39,4483 40
41
42
43
44
45
46
47
48
49
Angle
Re ected intensity
PEI
PSS
Even subnanometer differences in the inner and outer circles within
a CVD chamber can be measured using MP-SPR. Here, MP-SPR discovered
a 10 nm difference in metal deposition thickness towards center and 0.2 nm
difference along the outer circle.
Binding of functionalized gold nanoparticles (50 nm in diameter) onto
a self-assembled polymer surface measured with MP-SPR at 785 nm.
Angle (degree)
Re ected Intensity (a.u)
0.2
0.0
0.4
0.6
0.8
1
40
41
42
43
44
45
46
D
e
p
o
s
i
t
i
o
n
c
h
a
m
b
e
r
Target
50.4
mm
49.0
mm
39.4
mm
39.2
mm
39.2
mm
Angle (deg)
60
0,8
0,9
0,7
0,6
0,5
0,4
0,3
0,2
0,1
0
62
64
66
68
70
72
74
76
78
Re ected Intensity
choose MP-SPR?
AI O
Graphene
Au
Glass