| 1 | Bamboo-inspired cell-scale assembly for energy device applications显示文摘Rapid advances in flexible and wearable smart textiles demand low-cost,high-energy/power-density fiber-shaped supercapacitors(FSCs).The performance of FSCs is determined by the fabrication and assembly of fiber-shaped electrodes(FSEs),where an active charge-storage material is always clad around flexible charge transmission current collectors.Inspired by the tissue structure of natural bamboo,wherein parenchyma cells(PCs)that store nutrients are clad around bamboo fibers(BFs),we propose a strategy for converting bamboo cells into FSEs using conductive BFs and activated PCs as current collectors and active materials,respectively.The assembled electrode has a high specific capacitance of 1454 mF cm^(−2) at 0.64 mA cm^(−2).A solid-state FSC with a pair of bamboo-structured electrodes exhibited a substantially high energy density.Its mechanical flexibility enabled the knitting of wearable wristbands to drive ultra-small voltmeter indicators.This lightweight,low cost,and high-energy-density bamboostructured FSC could enable numerous smart textile applications. | Qiuqin Lin Runan Gao Daohao Li Yun Lu Shiqin Liu Yanglun Yu Yuxiang Huang Wenji Yu | 2022 | npj Flexible Electronics2022，6，1： | 1 |
| 2 | Simultaneous multi-material embedded printing for 3D heterogeneous structures显示文摘In order to mimic the natural heterogeneity of native tissue and provide a better microenvironment for cell culturing,multi-material bioprinting has become a common solution to construct tissue models in vitro.With the embedded printing method,complex 3D structure can be printed using soft biomaterials with reasonable shape fidelity.However,the current sequential multi-material embedded printing method faces a major challenge,which is the inevitable trade-off between the printed structural integrity and printing precision.Here,we propose a simultaneous multi-material embedded printing method.With this method,we can easily print firmly attached and high-precision multilayer structures.With multiple individually controlled nozzles,different biomaterials can be precisely deposited into a single crevasse,minimizing uncontrolled squeezing and guarantees no contamination of embedding medium within the structure.We analyse the dynamics of the extruded bioink in the embedding medium both analytically and experimentally,and quantitatively evaluate the effects of printing parameters including printing speed and rheology of embedding medium,on the 3D morphology of the printed filament.We demonstrate the printing of double-layer thin-walled structures,each layer less than 200μm,as well as intestine and liver models with 5%gelatin methacryloyl that are crosslinked and extracted from the embedding medium without significant impairment or delamination.The peeling test further proves that the proposed method offers better structural integrity than conventional sequential printing methods.The proposed simultaneous multi-material embedded printing method can serve as a powerful tool to support the complex heterogeneous structure fabrication and open unique prospects for personalized medicine. | Ziqi Gao Jun Yin Peng Liu Qi Li Runan Zhang Huayong Yang Hongzhao Zhou | 2023 | International Journal of Extreme Manufacturing2023，5，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员