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Bioinspired Micro Glue Threads Fabricated by Liquid Bridge-to-Solidification as an Effective Sensing Platform.
ACS Sensors ( IF 8.2 ) Pub Date : 2020-06-23 , DOI: 10.1021/acssensors.0c00378 Woong Kim 1 , Wonseok Lee 1 , Hyunsung Choi 2 , Gyudo Lee 3 , Jongsang Son 4 , Sang Won Lee 5 , Joohyung Park 1 , Woochang Kim 1 , Minwoo Kim 1 , Dae Sung Yoon 5 , Doyeon Bang 6 , Sungsoo Na 2 , Jinsung Park 1
ACS Sensors ( IF 8.2 ) Pub Date : 2020-06-23 , DOI: 10.1021/acssensors.0c00378 Woong Kim 1 , Wonseok Lee 1 , Hyunsung Choi 2 , Gyudo Lee 3 , Jongsang Son 4 , Sang Won Lee 5 , Joohyung Park 1 , Woochang Kim 1 , Minwoo Kim 1 , Dae Sung Yoon 5 , Doyeon Bang 6 , Sungsoo Na 2 , Jinsung Park 1
Affiliation
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Spiders synthesize their web using a liquid bridge-to-solidification mechanism at the end of their glands. Inspired by this process, in this work, we fabricated micro-glue threads (μGTs, polymer microwires) by a simple “pinch and spread” process using just two fingertips. The μGTs exhibited excellent tensile strength (∼50 GPa), comparable to those of spider silk and biological fibers. The chemical, physical, and mechanical properties of the μGTs were investigated, and it was confirmed that the thickness of the μGTs could be controlled by ethanol treatment in varying concentrations. Moreover, electrically conductive μGTs were easily fabricated by simply mixing them with various nanomaterials such as gold nanoparticles, zinc oxide nanowires, and reduced graphene oxide (rGO). Interestingly, the conductive μGTs, fabricated using rGO, exhibited remarkable electrical conductivity (0.45 μS) compared to those fabricated using other materials. The conductive μGTs are applicable not only to NO2 gas sensing but also as electrical fuselike materials that melt when the humidity increases. Collectively, the results present μGTs as cost-effective, simple, and versatile materials, which enables their application in a variety of sensors.
中文翻译：
生物启发的微胶水线通过液体桥接至增稠作用制成，作为有效的传感平台。
蜘蛛在腺体的末端使用液体桥连至凝固机制来合成其网。受此过程的启发，在这项工作中，我们仅用两个指尖即可通过简单的“捏合和扩散”过程来制作微胶线（μGT，聚合物微丝）。μGTs具有优异的抗张强度（〜50 GPa），与蜘蛛丝和生物纤维相当。研究了μGTs的化学，物理和机械性能，并证实可以通过改变浓度的乙醇处理来控制μGTs的厚度。此外，通过将它们与各种纳米材料（例如金纳米颗粒，氧化锌纳米线和还原氧化石墨烯（rGO））简单混合，就可以轻松制造出导电μGT。有趣的是，使用rGO制造的导电μGT，与使用其他材料制成的材料相比，其导电性极好（0.45μS）。导电μGT不仅适用于NO2气敏，但也可作为电熔丝状材料，在湿度增加时熔化。总的来说，结果表明μGTs是具有成本效益，简单且用途广泛的材料，可将其应用于各种传感器中。
更新日期：2020-07-24
中文翻译：
生物启发的微胶水线通过液体桥接至增稠作用制成，作为有效的传感平台。
蜘蛛在腺体的末端使用液体桥连至凝固机制来合成其网。受此过程的启发，在这项工作中，我们仅用两个指尖即可通过简单的“捏合和扩散”过程来制作微胶线（μGT，聚合物微丝）。μGTs具有优异的抗张强度（〜50 GPa），与蜘蛛丝和生物纤维相当。研究了μGTs的化学，物理和机械性能，并证实可以通过改变浓度的乙醇处理来控制μGTs的厚度。此外，通过将它们与各种纳米材料（例如金纳米颗粒，氧化锌纳米线和还原氧化石墨烯（rGO））简单混合，就可以轻松制造出导电μGT。有趣的是，使用rGO制造的导电μGT，与使用其他材料制成的材料相比，其导电性极好（0.45μS）。导电μGT不仅适用于NO2气敏，但也可作为电熔丝状材料，在湿度增加时熔化。总的来说，结果表明μGTs是具有成本效益，简单且用途广泛的材料，可将其应用于各种传感器中。
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