4 research outputs found
Bioinspired Hygromorphic Actuator Exhibiting Controlled Locomotion
We report a bioinspired hygromorphic
double-layered actuator (HDA), of which the movement is controlled
by cyclical changes in relative humidity (RH). The basic principle
of the HDA lies in the rapid swelling and deswelling of highly hygroscopic
layer-by-layer (LbL) assembled films deposited on a moisture-resistant
and flexible polytetrafluoroethylene (PTFE) ribbon. We engineer the
geometry of the HDA to induce locomotion on a ratchet track. By controlling
the exposure time and RH, the HDA is remotely controlled to move a
precise number of steps on the ratchet track during one cycle of RH
changes. We demonstrate that the step length of the HDA depends on
the relative thickness change of the LbL film. We also provide theoretical
considerations based on a plate theory and the Flory–Huggins
theory to describe the actuation of the HDA. Our work provides fundamental
insights into the fabrication and design of hygromorphic actuators
driven by RH changes
Bioinspired Hygromorphic Actuator Exhibiting Controlled Locomotion
We report a bioinspired hygromorphic
double-layered actuator (HDA), of which the movement is controlled
by cyclical changes in relative humidity (RH). The basic principle
of the HDA lies in the rapid swelling and deswelling of highly hygroscopic
layer-by-layer (LbL) assembled films deposited on a moisture-resistant
and flexible polytetrafluoroethylene (PTFE) ribbon. We engineer the
geometry of the HDA to induce locomotion on a ratchet track. By controlling
the exposure time and RH, the HDA is remotely controlled to move a
precise number of steps on the ratchet track during one cycle of RH
changes. We demonstrate that the step length of the HDA depends on
the relative thickness change of the LbL film. We also provide theoretical
considerations based on a plate theory and the Flory–Huggins
theory to describe the actuation of the HDA. Our work provides fundamental
insights into the fabrication and design of hygromorphic actuators
driven by RH changes
Bioinspired Hygromorphic Actuator Exhibiting Controlled Locomotion
We report a bioinspired hygromorphic
double-layered actuator (HDA), of which the movement is controlled
by cyclical changes in relative humidity (RH). The basic principle
of the HDA lies in the rapid swelling and deswelling of highly hygroscopic
layer-by-layer (LbL) assembled films deposited on a moisture-resistant
and flexible polytetrafluoroethylene (PTFE) ribbon. We engineer the
geometry of the HDA to induce locomotion on a ratchet track. By controlling
the exposure time and RH, the HDA is remotely controlled to move a
precise number of steps on the ratchet track during one cycle of RH
changes. We demonstrate that the step length of the HDA depends on
the relative thickness change of the LbL film. We also provide theoretical
considerations based on a plate theory and the Flory–Huggins
theory to describe the actuation of the HDA. Our work provides fundamental
insights into the fabrication and design of hygromorphic actuators
driven by RH changes
Bioinspired Hygromorphic Actuator Exhibiting Controlled Locomotion
We report a bioinspired hygromorphic
double-layered actuator (HDA), of which the movement is controlled
by cyclical changes in relative humidity (RH). The basic principle
of the HDA lies in the rapid swelling and deswelling of highly hygroscopic
layer-by-layer (LbL) assembled films deposited on a moisture-resistant
and flexible polytetrafluoroethylene (PTFE) ribbon. We engineer the
geometry of the HDA to induce locomotion on a ratchet track. By controlling
the exposure time and RH, the HDA is remotely controlled to move a
precise number of steps on the ratchet track during one cycle of RH
changes. We demonstrate that the step length of the HDA depends on
the relative thickness change of the LbL film. We also provide theoretical
considerations based on a plate theory and the Flory–Huggins
theory to describe the actuation of the HDA. Our work provides fundamental
insights into the fabrication and design of hygromorphic actuators
driven by RH changes