Fabrication of stretchable single-walled carbon nanotube logic devices.
The fabrication of a stretchable single-walled carbon nanotube (SWCNT) complementary metal oxide semiconductor (CMOS) inverter array and ring oscillators is reported. The SWCNT CMOS inverter exhibits static voltage transfer characteristics with a maximum gain of 8.9 at a supply voltage of 5 V. The fabricated devices show stable electrical performance under the maximum strain of 30% via forming wavy configurations. In addition, the 3-stage ring oscillator demonstrates a stable oscillator frequency of ∼3.5 kHz at a supply voltage of 10 V and the oscillating waveforms are maintained without any distortion under cycles of pre-strain and release. The strains applied to the device upon deformation are also analyzed by using the classical lamination theory, estimating the local strain of less than 0.6% in the SWCNT channel and Pd electrode regions which is small enough to keep the device performance stable under the pre-strain up to 30%. This work demonstrates the potential application of stretchable SWCNT logic circuit devices in future wearable electronics.
Department of Chemical and Biological Engineering, Korea University, Seoul, 136-701, Korea.
Jangyeol
J
Yoon
Gunchul
G
Shin
Joonsung
J
Kim
Young Sun
YS
Moon
Seung-Jung
SJ
Lee
Goangseup
G
Zi
Jeong Sook
JS
Ha
SWCNT; logic device; stretchable; wavy configuration