Nano-Filamented Textile Sensor Platform with High Structure Sensitivity
Nano-Filamented Textile Sensor Platform with High Structure Sensitivity
复制标题
具有高结构灵敏度的纳米丝纺织品传感器平台
DOI：
10.1021/acsami.2c06802
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Lu, S.
中科院分区：
文献类型：
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作者：
Yan, S.;Dinh, D.;Shang, G.;Wang, S.;Zhao, W.;Liu, X.;Robinson, R.;Lombardi III, J.;He, N.;Lu, S.
创造非导电、疏水和自由接触的纺织或纤维网络材料的化学响应性电功能的关键挑战是如何赋予3D结构功能丝以实现响应性结构灵敏度，这对于建立传感器应用的纤维平台技术至关重要。我们使用电纺聚合物纤维衬底，嵌入由尺寸可调的金纳米颗粒和结构敏感的树枝定义的纳米细丝作为交联剂，展示了这一能力。由此产生的颗粒间性质强烈依赖于纳米细丝的组装，从而使界面具有对分子相互作用具有高结构敏感性。对不同链长和异构体的蒸气酒精分子的化学抗性反应证明了这一点，这在涉及高湿度或高湿度背景的呼吸和汗液传感中至关重要。灵敏度随链长的增加而增大，随同分异构体的不同而不同。这种方法利用了传感器阵列形式的纳米纤维的多功能可调谐性，对不同链长和异构体的醇分子显示出高的结构敏感度。还讨论了高结构敏感度及其对纺织品传感器阵列设计的范式转变的影响，用于通过呼吸或汗液传感对人体性能进行多路监测以及空气质量的环境监测。
A key challenge to the creation of chemically responsive electro-functionality of nonconductive, hydrophobic, and free-contacted textile or fibrous network materials is how to impart the 3D structure with functional filaments to enable responsive structure sensitivity, which is critical in establishing the fibrous platform technology for sensor applications. We demonstrate this capability using an electrospun polymeric fibrous substrate embedded with nano-filaments defined by size-tunable gold nanoparticles and structurally sensitive dendrons as crosslinkers. The resulting interparticle properties strongly depend on the assembly of the nano-filaments, enabling an interface with high structure sensitivity to molecular interactions. This is demonstrated with chemiresistive responses to vaporous alcohol molecules with different chain lengths and isomers, which is critical in breath and sweat sensing involving a high-moisture or -humidity background. The sensitivity scales with the chain length and varies with their isomers. This approach harnesses the multifunctional tunability of the nano-filaments in a sensor array format, showing high structure sensitivity to the alcohol molecules with different chain lengths and isomers. The high structure sensitivity and its implications for a paradigm shift in the design of textile sensor arrays for multiplexing human performance monitoring via breath or sweat sensing and environmental monitoring of air quality are also discussed.