Directed assembly of carbon nanotubes on soft substrates for use as a flexible biosensor array.
We have developed a method to selectively assemble and align carbon nanotubes (CNTs) on soft substrates for use as flexible biosensors. In this strategy, a thin oxide layer was deposited on soft substrates via low temperature plasma enhanced chemical vapor deposition, and a linker-free assembly process was applied on the oxide surface where the assembly of carbon nanotubes was guided by methyl-terminated molecular patterns on the oxide surface. The electrical characterization of the fabricated CNT devices exhibited a typical p-type gating effect and 1/f noise behavior. The bare oxide regions near CNTs were functionalized with glutamate oxidase to fabricate selective biosensors to detect two forms of glutamate substances existing in different situations: L-glutamic acid, a neurotransmitting material, and monosodium glutamate, a food additive.
Koh
Juntae
J
Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea.
Yi
Mihye
M
Yang Lee
Byung
B
Kim
Tae Hyun
TH
Lee
Joohyung
J
Jhon
Young Min
YM
Hong
Seunghun
S