Healing defective CVD-graphene through vapor phase treatment

Nanoscale ◽  
2014 ◽  
Vol 6 (11) ◽  
pp. 5639-5644 ◽  
Author(s):  
Do Van Lam ◽  
Sang-Min Kim ◽  
Youngji Cho ◽  
Jae-Hyun Kim ◽  
Hak-Joo Lee ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Vapor Phase ◽  
Transfer Process ◽  
Growth Stage ◽  
Structural Defects ◽  
Cvd Graphene ◽  
Term Stability ◽  
Long Term Stability

Structural defects present on CVD-graphene, which originated from the growth stage and transfer process, can be selectively healed by vapor phase treatment. The treated graphenes show noticeably improved electrical properties with long term stability in contrast with chemically doped graphenes.

Adhesion, Reaction and Stability of Metal/Polyimide Interfaces

1989 ◽  
Vol 167 ◽  
Author(s):  
J. Kim ◽  
S. P. Kowalczyk ◽  
Y. H. Kim ◽  
N. J. Chou ◽  
T. S. Oh
Keyword(s):  
Electrical Properties ◽  
Chemical Bond ◽  
Adhesion Strength ◽  
Interfacial Reactions ◽  
Great Care ◽  
Metal Interface ◽  
Term Stability ◽  
Long Term Stability ◽  
Mechanical And Electrical Properties

AbstractInterfacial reactions of polyimide with several metals have been investigated by XPS and TEM to determine their effects on adhesion and long term stability. It has been found that the polyimide-on-metal interface and the metal-on-polyimide interface are intrinsically different; in the case of PI-on-metal interface, the precursor of polyimide, polyamic acid, reacts with the metal resulting in a strong chemical bond and therefore, higher adhesion strength than the corresponding metal-on-PI interface. Both interfaces are found susceptible to T/H environment, resulting in significant adhesion loss. The mechanical and electrical properties of polyimide may be altered as a result of the interaction with metals and therefore, great care is necessary to insure a stable interface and the reliability of devices.

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