The Geometry Variation of As-Grown Carbon Coils with Ni Layer Thickness and Hydrogen Plasma Pretreatment

Table 1

Ni layer thickness for the samples according to the evaporation time of Ni powders and without or with H₂ plasma pretreatment.

Samples	Evaporation time of Ni powders	Resulting Ni layer thickness	5 minutes H2 plasma pretreatment
A	10 sec	~50 nm	None
B	20 sec	~80 nm	None
C	40 sec	~150 nm	None
D	1 minute	~250 nm	None
E	3 minutes	~350 nm	None
F	1 minute	~250 nm	Yes