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Highly Sensitive and Flexible Strain–Pressure Sensors with Cracked Paddy-Shaped MoS2/Graphene Foam/Ecoflex Hybrid Nanostructures
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-09-27 00:00:00 , DOI: 10.1021/acsami.8b11233 Seong Jun Kim 1 , Shuvra Mondal 1, 2 , Bok Ki Min 1 , Choon-Gi Choi 1, 2
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-09-27 00:00:00 , DOI: 10.1021/acsami.8b11233 Seong Jun Kim 1 , Shuvra Mondal 1, 2 , Bok Ki Min 1 , Choon-Gi Choi 1, 2
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Three-dimensional graphene porous networks (GPNs) have received considerable attention as a nanomaterial for wearable touch sensor applications because of their outstanding electrical conductivity and mechanical stability. Herein, we demonstrate a strain–pressure sensor with high sensitivity and durability by combining molybdenum disulfide (MoS2) and Ecoflex with a GPN. The planar sheets of MoS2 bonded to the GPN were conformally arranged with a cracked paddy shape, and the MoS2 nanoflakes were formed on the planar sheet. The size and density of the MoS2 nanoflakes were gradually increased by raising the concentration of (NH4)2MoS4. We found that this conformal nanostructure of MoS2 on the GPN surface can produce improved resistance variation against external strain and pressure. Consequently, our MoS2/GPN/Ecoflex sensors exhibited noticeably improved sensitivity compared to previously reported GPN/polydimethylsiloxane sensors in a pressure test because of the existence of the conformal planar sheet of MoS2. In particular, the MoS2/GPN/Ecoflex sensor showed a high sensitivity of 6.06 kPa–1 at a (NH4)2MoS4 content of 1.25 wt %. At the same time, it displayed excellent durability even under repeated loading–unloading pressure and bending over 4000 cycles. When the sensor was attached on a human temple and neck, it worked correctly as a drowsiness detector in response to motion signals such as neck bending and eye blinking. Finally, a 3 × 3 tactile sensor array showed precise touch sensing capability with complete isolation of electrodes from each other for application to touch electronic applications.
中文翻译：
具有裂纹的稻谷型MoS 2 /石墨烯泡沫/ Ecoflex杂化纳米结构的高灵敏且灵活的应变压力传感器
三维石墨烯多孔网络（GPNs）由于其出色的导电性和机械稳定性而作为可穿戴式触摸传感器应用的纳米材料受到了广泛关注。本文中，我们通过结合使用二硫化钼（MoS 2）和Ecoflex与GPN来展示具有高灵敏度和耐用性的应变压力传感器。结合至GPN的MoS 2的平面片以裂纹的稻谷形状保形地布置，并且在该平面片上形成MoS 2纳米薄片。通过提高（NH 4）2 MoS 4的浓度，逐渐增加了MoS 2纳米薄片的尺寸和密度。。我们发现，MoS 2在GPN表面上的这种共形纳米结构可以产生改进的抵抗外部应变和压力的电阻变化。因此，我们的的MoS 2 / GPN /传感器的Ecoflex展出明显改善的灵敏度相比以前报道GPN /聚二甲基硅氧烷中的传感器的压力测试，因为硫化钼的共形平面板的存在的2。特别是，MoS 2 / GPN / Ecoflex传感器在（NH 4）2 MoS 4下显示出6.06 kPa –1的高灵敏度。含量为1.25重量％。同时，即使在反复的装卸压力和超过4000次循环弯曲的情况下，它也显示出出色的耐久性。当传感器安装在人类的太阳穴和脖子上时，它可以作为睡意检测器正常工作，以响应诸如颈部弯曲和眨眼之类的运动信号。最后，一个3×3的触觉传感器阵列显示了精确的触摸感应能力，并且电极彼此完全隔离，可应用于触摸电子应用。
更新日期：2018-09-27
中文翻译：
具有裂纹的稻谷型MoS 2 /石墨烯泡沫/ Ecoflex杂化纳米结构的高灵敏且灵活的应变压力传感器
三维石墨烯多孔网络（GPNs）由于其出色的导电性和机械稳定性而作为可穿戴式触摸传感器应用的纳米材料受到了广泛关注。本文中，我们通过结合使用二硫化钼（MoS 2）和Ecoflex与GPN来展示具有高灵敏度和耐用性的应变压力传感器。结合至GPN的MoS 2的平面片以裂纹的稻谷形状保形地布置，并且在该平面片上形成MoS 2纳米薄片。通过提高（NH 4）2 MoS 4的浓度，逐渐增加了MoS 2纳米薄片的尺寸和密度。。我们发现，MoS 2在GPN表面上的这种共形纳米结构可以产生改进的抵抗外部应变和压力的电阻变化。因此，我们的的MoS 2 / GPN /传感器的Ecoflex展出明显改善的灵敏度相比以前报道GPN /聚二甲基硅氧烷中的传感器的压力测试，因为硫化钼的共形平面板的存在的2。特别是，MoS 2 / GPN / Ecoflex传感器在（NH 4）2 MoS 4下显示出6.06 kPa –1的高灵敏度。含量为1.25重量％。同时，即使在反复的装卸压力和超过4000次循环弯曲的情况下，它也显示出出色的耐久性。当传感器安装在人类的太阳穴和脖子上时，它可以作为睡意检测器正常工作，以响应诸如颈部弯曲和眨眼之类的运动信号。最后，一个3×3的触觉传感器阵列显示了精确的触摸感应能力，并且电极彼此完全隔离，可应用于触摸电子应用。
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