Lattice-contraction triggered synchronous electrochromic actuator.
Kerui LiYuanlong ShaoHongping YanZhi LuKent J GriffithJinhui YanGang WangHongwei FanJingyu LuWei HuangBin BaoXuelong LiuChengyi HouQinghong ZhangYaogang LiJunsheng YuHongzhi WangPublished in: Nature communications (2018)
Materials with synchronous capabilities of color change and actuation have prospects for application in biomimetic dual-stealth camouflage and artificial intelligence. However, color/shape dual-responsive devices involve stimuli that are difficult to control such as gas, light or magnetism, and the devices show poor coordination. Here, a flexible composite film with electrochromic/actuating (238° bending angle) dual-responsive phenomena, excellent reversibility, high synchronization, and fast response speed (< 5 s) utilizes a single active component, W18O49 nanowires. From in situ synchrotron X-ray diffraction, first principles calculations/numerical simulations, and a series of control experiments, the actuating mechanism for macroscopic deformation is elucidated as pseudocapacitance-based reversible lattice contraction/recovery of W18O49 nanowires (i.e. nanostructure change at the atomic level) during lithium ion intercalation/de-intercalation. In addition, we demonstrate the W18O49 nanowires in a solid-state ionic polymer-metal composite actuator that operates stably in air with a significant pseudocapacitive actuation.
Keyphrases
- solid state
- room temperature
- artificial intelligence
- reduced graphene oxide
- machine learning
- big data
- high resolution
- molecular dynamics
- cancer therapy
- deep learning
- ionic liquid
- gold nanoparticles
- magnetic resonance imaging
- density functional theory
- monte carlo
- computed tomography
- magnetic resonance
- crystal structure
- mass spectrometry
- dual energy
- contrast enhanced