Publications

@article{He2020-wu,

title = {Real-Time Humidity Measurement during Sports Activity using 

 Optical Fibre Sensing},

author = {Chenyang He and Serhiy Korposh and Francisco Ulises Hernandez and Liangliang Liu and Ricardo Correia and Barrie R Hayes-Gill and Stephen P Morgan},

year  = {2020},

date = {2020-03-01},

journal = {Sensors (Basel)},

volume = {20},

number = {7},

pages = {1904},

publisher = {MDPI AG},

abstract = {An optical fibre sensor for monitoring relative humidity (RH) 

 changes during exercise is demonstrated. The humidity sensor 

 comprises a tip coating of poly (allylamine hydrochloride) 

 (PAH)/silica nanoparticles (SiO2 NPs) deposited using the 

 layer-by-layer technique. An uncoated fibre is employed to 

 compensate for bending losses that are likely to occur during 

 movement. A linear fit to the response of the sensing system to RH demonstrates a sensitivity of 3.02 mV/% (R2 = 0.96), 

 hysteresis $±$ 1.17% RH when 11 bilayers of PAH/SiO2 NPs are 

 coated on the tip of the fibre. The performance of two different 

 textiles (100% cotton and 100% polyester) were tested in 

 real-time relative humidity measurement for 10 healthy 

 volunteers. The results demonstrate the moisture wicking 

 properties of polyester in that the relative humidity dropped 

 more rapidly after cessation of exercise compared to cotton. The 

 approach has the potential to be used to monitor sports 

 performance and by clothing developers for characterising 

 different garment designs.},

keywords = {humidity sensing, layer-by-layer, optical fibre sensor, real-time measurement, smart textiles, wearable technology},

pubstate = {published},

tppubtype = {article}

}