.png){kind=icon}
Return
Micrometer-sized electrically programmable shape-memory actuators for low-power microrobotics
.png){kind=icon}
PRE
AI
DOI：10.1126/scirobotics.abe6663.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
Shape-memory actuators allow machines ranging from robots to medical implants to hold their form without continuous power, a feature especially advantageous for situations where these devices are untethered and power is limited. Although previous work has demonstrated shape-memory actuators using polymers, alloys, and ceramics, the need for micrometer-scale electro-shape-memory actuators remains largely unmet, especially ones that can be driven by standard electronics (similar to 1 volt). Here, we report on a new class of fast, high-curvature, low-voltage, reconfigurable, micrometer-scale shape-memory actuators. They function by the electrochemical oxidation/reduction of a platinum surface, creating a strain in the oxidized layer that causes bending. They bend to the smallest radius of curvature of any electrically controlled microactuator (similar to 500 nanometers), are fast (<100-millisecond operation), and operate inside the electrochemical window of water, avoiding bubble generation associated with oxygen evolution. We demonstrate that these shape-memory actuators can be used to create basic electrically reconfigurable microscale robot elements including actuating surfaces, origami-based three-dimensional shapes, morphing metamaterials, and mechanical memory elements. Our shape-memory actuators have the potential to enable the realization of adaptive microscale structures, bio-implantable devices, and microscopic robots.
Keywords:
PLATINUM-ELECTRODES
SURFACE OXIDATION
THIN
DESIGN
GROWTH
XPS
Journal
IF:
27.5
Papers:
933
Citations:
1.4W
Organization
Cited Papers
ShareSaveShareSaveShape Memory Alloy (SMA)-Based Microscale Actuators with 60% Deformation Rate and 1.6 kHz Actuation Speed.png)
SMALL
SMALLIF12.1
PREAI
ShareSaveP-gp Inhibition-Based Strategies for Modulating Pharmacokinetics of Anticancer Drugs: An Update
PREAI
ShareSaveGrain rotation mediated by grain boundary dislocations in nanocrystalline platinumNATURE COMMUNICATIONS
OAAI
NATURE COMMUNICATIONSIF15.7
OAAIShareSaveShareSaveShareSaveShareSave
View more