by both the magnetic filler and the matrix. The liquid-like ferrofluids with transformed shape easily lose magnetization once the applied magnetic field is removed, and the solid ferromagnetic materials are hard to be reconfigured as needed.Recently, a reversible paramagnetic-toferromagnetic transformation of ferrofluid droplets by the jamming of a monolayer of magnetic nanoparticles assembled at the water-oil interface was developed. [8] However, this well-designed framework is applicable only within the liquid system. The elastic matrix-based AMC could achieve a limited reconfigurable shape, while the dynamically programmed and reversible magnetic reconfiguration meets a huge challenge. [9] In addition, there is an inevitable mismatch between the electrical and ferromagnetic performances for most AMC materials due to the insulative matrix. It is naturally desirable to design a reconfigurable ferromagnetic material with high electrical conductivity and transformed shape, attracting massive attention due to the promising applications in many fields such as flexible electronics and soft robotics.Here, we present a novel reconfigurable ferromagnetic liquid metal putty-like material (FM-LMP) with high electrical conductivity, prepared by homogenously mixing the room temperature LM of EGaIn (the melting point of 15.7 °C) and ferromagnetic neodymium-iron-boron (NdFeB) microparticles, as illustrated schematically in Figure 1a. The NdFeB microparticles dispersed in the LM matrix were then magnetically saturated through a strong impulse of the magnetic field. It is surprising to find that the magnetization could turn the liquid-like suspension into the solid-like putty-like material. The FM-LMP is thus easily remodeled like modelling clay to various magnet shapes. The macroscopic magnetic performance of the FM-LMP stems from the magnetic orientation alignment of the magnetized NdFeB microparticles immersed in the LM matrix, as illustrated in Figure 1b. The magnetic polarity alignment of magnetized microparticles with high mobility when suspended in the LM matrix could be reversibly disordered and rearranged to enable FM-LMP exhibit macro scopical demagnetization and magnetization. The magnetic LM [10] has been recently proposed through mixing soft magnetic materials (such as pure iron or It is remarkably desirable and challenging to design reconfigurable ferromagnetic materials with high electrical conductivity. This has attracted great attention due to promising applications in many fields such as emerging flexible electronics and soft robotics. However, the shape and magnetic polarity of existing ferromagnetic materials with low conductivity are both hard to be reconfigured, and the magnetization of insulative ferrofluids is easily lost once the external magnetic field is removed. A novel reconfigurable ferromagnetic liquid metal (LM) puttylike material (FM-LMP) with high electrical conductivity and transformed shape, which is prepared through homogenously mixing neodymiumiron-boron microparticles into the gallium-base...

The excellent stretchability and biocompatibility of flexible sensors have inspired an emerging field of plant wearables, which enable intimate contact with the plants to continuously monitor the growth status and localized microclimate in real‐time. Plant flexible wearables provide a promising platform for the development of plant phenotype and the construction of intelligent agriculture via monitoring and regulating the critical physiological parameters and microclimate of plants. Here, the emerging applications of plant flexible wearables together with their pros and cons from four aspects, including physiological indicators, surrounding environment, crop quality, and active control of growth, are highlighted. Self‐powered energy supply systems and signal transmission mechanisms are also elucidated. Furthermore, the future opportunities and challenges of plant wearables are discussed in detail.

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In article number 2000827, Zhizhu He and co‐workers report a ferromagnetic liquid metal putty‐like material with unique reconfigurable magnetic polarity, stiffening effect, transformed shape, and high electrical conductivity. It can be used as printable magnetic and conductive ink to enable a series of novel applications, including magnetic switching, flexible magnetic recording paper, and self‐sensing soft robotics using magnetic actuation.

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