Table 3:
Normalized areas, atomic percentages, and atomic report are obtained by XPS analysis, of different samples: (a) glass/MPS/gold/PDMS
n=10
, (b) glass/MPS/gold/PDMS
n=10
/gold, (c) glass/MPS/gold/PDMS
n=37
, and (d) glass/MPS/gold/PDMS
n=37
/gold.
PDMS
(n=10)
PDMS
(n=10)
PDMS
(n=37)
PDMS
(n=37)
grafted on gold layer (a)
covered by gold layer (b)
Grafted on gold layer (c)
covered by gold layer (d)
Normalised area C1s (cps eV)
96500
74300
163200
184350
Normalised area O1s (cps eV)
30541
36377
42131
24115
Normalised area N1s (cps eV)
2213
2601
6431
2669
Normalised area Si 2p (cps eV)
16487
18092
18374
13374
Normalised area Au4f (cps eV)
35447
27553
—
46816
% carbon
53.3
46.8
70.9
67.9
% oxygen
16.9
22.9
18.3
8.9
% nitrogen
1.2
1.6
2.8
1
% Silicon (Si)
9.1
11.4
8
4.9
% gold
19.6
17.3
—
17.3
C/Si
5.85
4.11
8.88
13.78
Si/N
7.45
6.96
2.86
5.01
Au/Si
2.15
1.52
—
3.50
Au/N
16.02
10.59
—
17.54
O/Si
1.85
2.01
2.29
1.80