In Situ Assembly of Well-Dispersed Ag Nanoparticles throughout Electrospun Alginate Nanofibers for Monitoring Human Breath-Smart Fabrics

ACS Applied Materials & Interfaces
Jun ZhangYun-Ze Long

Abstract

Alginate nanofibers assembled with silver nanoparticles throughout the whole nanofiber were fabricated by three steps including electrospinning of Na-alginate nanofibers, ion exchange between the sodium and silver ions, and in situ reduction of silver nanoparticles. The content, distribution, and size of the nanoparticles are controllable by tuning reaction conditions. Ag/alginate nanofibers exhibit good humidity sensitivity in a wide humidity range from 20% ambient relative humidity (RH) to 85% RH. Interestingly, these humidity sensors can be attached to a 3M-9001V mask for monitoring human breath during exercise and emotion changes, and this smart mask exhibits accurate and continuous human breath tracking, no matter how fast or slow as well as how deep or shallow is the human breathing. The obtained frequencies of respiration during normal, running, delight, and sadness conditions were 16, 13, 14, and 8 times per minute, respectively. Moreover, the signal waveform obtained under emotion changes is distinguishable, implying its potential applications in lie detection and interrogation. Thanks to this smart mask, it could accurately capture the rate and depth of respiration, providing an effective, low-cost, and convenient app...Continue Reading

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Citations

Aug 9, 2020·International Journal of Nanomedicine·Tongtong ZhouJing Yu
Feb 26, 2020·Materials·Teboho Clement MokhenaJeremia Shale Sefadi
Oct 30, 2020·Pharmaceuticals·Hazem ChoukaifeMulham Alfatama
Jan 19, 2021·Chemical Reviews·Chunya WangTakao Someya
Jul 20, 2021·ACS Applied Materials & Interfaces·Jinpeng LiKefu Chen
Aug 25, 2020·ACS Applied Materials & Interfaces·Yan WangJia Huang

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