Highly Sensitive Flexible Poly(dimethylsiloxane) Composite Sensors Based on Flame-Synthesized Carbon Foam Made of Vertical Carbon Nanosheet Arrays,ACS Sustainable Chemistry & Engineering

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Highly Sensitive Flexible Poly(dimethylsiloxane) Composite Sensors Based on Flame-Synthesized Carbon Foam Made of Vertical Carbon Nanosheet Arrays
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-08-19 , DOI: 10.1021/acssuschemeng.0c04583
Wei Meng ₁ , Xusheng Du _{1,

2} , Chuanguo Ma ₃ , Wei Li ₁

Affiliation

A simple approach for the flame synthesis of carbon foam (FCF) via one-step catalytic deposition of carbon on a Ni template was developed. FCF was deposited within 5 min at ∼500 °C in an alcohol flame and the foam strut wall was found to be actually made of vertical carbon nanosheets. The carbon strut layer displayed a distinctive morphology between its two surface sides. The rough inner surface of the carbon strut originated from the vertically aligned carbon sheets, while some short carbon nanotubes with a length less than 1 μm grew on the outer strut surface. The strain sensitivity of the FCF@poly(dimethylsiloxane) composite was investigated, including the dynamic electrical response. It was believed that the unique hierarchical structure of the carbon foam promoted the performance of the composite sensors, which exhibited one of the highest strain sensitivity among the carbon foam-based strain sensors. At 30% stretching strain, the resistance of the composite increased remarkably more than 700%. Moreover, the sensor exhibited high and stable sensitivity in various physiological detection, including the finger bending and wrist pulse. The present flame synthesis method could be a facile and an effective technique to deposit a vertical carbon nanosheet array, which could find many promising applications, including human physiology monitoring and medical detection.

中文翻译：

基于垂直碳纳米片阵列的火焰合成碳泡沫的高灵敏度柔性聚二甲基硅氧烷复合传感器

开发了一种通过在Ni模板上一步一步催化沉积碳来火焰合成碳泡沫（FCF）的简单方法。FCF在约500°C下于5分钟内在酒精火焰中沉积，泡沫支撑壁实际上是由垂直碳纳米片制成的。碳支撑层在其两个表面侧之间显示出独特的形态。碳撑杆的粗糙内表面起源于垂直排列的碳片，而一些短于长度小于1μm的短碳纳米管则生长在外撑杆表面。研究了FCF @聚（二甲基硅氧烷）复合材料的应变敏感性，包括动态电响应。据认为，碳泡沫的独特分层结构可提高复合传感器的性能，在基于碳泡沫的应变传感器中表现出最高的应变灵敏度之一。在30％的拉伸应变下，复合材料的电阻明显增加了700％以上。此外，该传感器在包括手指弯曲和手腕脉搏在内的各种生理检测中均显示出高而稳定的灵敏度。本发明的火焰合成方法可以是沉积垂直碳纳米片阵列的简便且有效的技术，其可以发现许多有希望的应用，包括人体生理监测和医学检测。包括手指弯曲和手腕搏动。本发明的火焰合成方法可能是沉积垂直碳纳米片阵列的简便且有效的技术，其可以发现许多有希望的应用，包括人体生理监测和医学检测。包括手指弯曲和手腕搏动。本发明的火焰合成方法可能是沉积垂直碳纳米片阵列的简便且有效的技术，其可以发现许多有希望的应用，包括人体生理监测和医学检测。

更新日期：2020-08-19

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