TY - GEN
T1 - Carbon nanotube forest devices with negative poisson's ratio
AU - Ya'akobovitz, Assaf
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016/1/5
Y1 - 2016/1/5
N2 - We demonstrate a negative Poisson's ratio in carbon nanotube forest devices subjected to extension motion obtained by means of electrostatic actuation. Actuated devices were optically monitored, while electrostatic force was applied and the axial (parallel to the carbon nanotubes) and lateral (perpendicular to the carbon nanotubes) motions were extracted. Poisson's ratios were then calculated for the top, middle and bottom portions of the carbon nanotube forest devices. Since extension motion is associated with morphology change of enhancement of carbon nanotube alignment, negative Poisson's ratios were obtained. Large negative Poisson's ratios were obtained in the top portion (where morphology change is most significant), while other portions (where morphology change is less significant) demonstrated smaller value of negative Poisson's ratio. This property makes carbon nanotube forest attractive material for building of micro-electromechanical devices with versatile motion transformation.
AB - We demonstrate a negative Poisson's ratio in carbon nanotube forest devices subjected to extension motion obtained by means of electrostatic actuation. Actuated devices were optically monitored, while electrostatic force was applied and the axial (parallel to the carbon nanotubes) and lateral (perpendicular to the carbon nanotubes) motions were extracted. Poisson's ratios were then calculated for the top, middle and bottom portions of the carbon nanotube forest devices. Since extension motion is associated with morphology change of enhancement of carbon nanotube alignment, negative Poisson's ratios were obtained. Large negative Poisson's ratios were obtained in the top portion (where morphology change is most significant), while other portions (where morphology change is less significant) demonstrated smaller value of negative Poisson's ratio. This property makes carbon nanotube forest attractive material for building of micro-electromechanical devices with versatile motion transformation.
KW - carbon nanotube forests
KW - electrostatic actuation
KW - motion transformation
KW - negative Poisson's ratio
UR - http://www.scopus.com/inward/record.url?scp=85010936387&partnerID=8YFLogxK
U2 - 10.1109/ICSENS.2016.7808837
DO - 10.1109/ICSENS.2016.7808837
M3 - Conference contribution
AN - SCOPUS:85010936387
T3 - Proceedings of IEEE Sensors
BT - IEEE Sensors, SENSORS 2016 - Proceedings
PB - Institute of Electrical and Electronics Engineers
T2 - 15th IEEE Sensors Conference, SENSORS 2016
Y2 - 30 October 2016 through 2 November 2016
ER -