Biomedical Engineering Reference
In-Depth Information
Job : ME dept
Ag30-ax (27/07/98 09:53)
Pt
Counts
20000
Ag
PIEM
Ag
15000
1000
Ag
Ag
8
Ag
Ag
Ag
c
o
Ag
F
0
0
2
4
(keV)
FIGURE 3.49
A schematic diagram illustrating the silver deposition process (left) along with
a typical x-ray spectrum taken on the surface. Low voltage was applied to carry out the silver
deposition.
TABLE 3.8
Test Samples
Sample 1 (baseline)
Sample 2
Sample 3
Cation type
Li
+
Li
+
Li
+
Surface roughening
Yes
Yes
Yes
Pretreatment
1
N
HCl boiling
1
N
HCl boiling
1
N
HCl boiling
Platinum deposition
process
Initial compositing
process; surface
electroding process
Initial compositing
process; surface
electroding process
Initial compositing
process; surface
electroding process
Top layer deposition
process
None
Silver, electrochemical
Copper, electrochemical
Comments
Thin and bright color
Thin and copper-like
color (initially); later
turned into bluish color
(corrosive)
Three test samples were prepared by the processes described previously: sample
1 with platinum only (baseline), sample 2 with platinum/silver, and sample 3 with
platinum/copper. First, one batch of the IPMNC artificial muscle (100
200 mm)
was prepared with platinum prior to silver (or copper) deposition. Then, sample 1
was cut in a standard size of a 5-
×
×
20-mm strip for baseline testing. Also, two strips
were cut to 10
50 mm for the electrochemical deposition process. Silver and copper
solutions were prepared by dissolving appropriate concentrations of AgNO
3
and
CuSO
4
in water, respectively. After electrochemical deposition was completed, sam-
ples 2 and 3 were cut into 5-
×
×
20-mm strips. Table 3.8 gives the detailed process
information of each sample.
