C. Cheng & D.T. Haynie
“Growth of Single Conductive Nanowires at Prescribed Loci”
Supplemental Material
Intensity
Error
Atomic
(c/s)
2-sig
Wt %
Ka
63.74
2.914
Si
Ka
134.21
Pd
La
Au
La
Elt.
Line
O
Conc
Units
77.146
65.565
wt.%
4.229
22.772
33.974
wt.%
0.41
0.235
0.082
0.461
wt.%
0
0
0
0
wt.%
Total
100
100
wt.%
Table 1. Electron dispersive X-ray data.
b
a
Fig. 1.
c
Schematic electrode designs.
1
(a)
(b)
2
(c)
Fig. 2. Calculated electrical properties of electrode structure (a) in Fig. 1 of supplemental
material. (a) Scalar and vector fields. Arrows indicate field magnitude and direction. (b)
Equipotential surfaces between electrodes. The direction of the electric field is everywhere
perpendicular to an equipotential surface. The magnitude of the field at any point is given
by the gradient of the potential. Arrows indicate field magnitude and direction. It is
evident from a comparison with Fig. 1(a) and all other electrode structures studied in this
work, that nanowires grew at or very close to where the field strength between electrodes was
maximal. (c) Density of field lines.
3
(a)
(b)
Fig. 3. Pt dendritic structures. (a) See Fig. 1(c) for schematic of electrode structure. (b)
See Fig. 1(b) for schematic of electrode structure.
4