@misc{10481/61990,
year = {2020},
url = {http://hdl.handle.net/10481/61990},
abstract = {In this paper we present the design, fabrication and characterization of electro-textile
inductor and capacitor patterns on denim fabric as a basis for the development of
wearable e-textiles. Planar coil inductors have been harnessed as antenna structures for
the development of Near Field Communication (NFC) tags with temperature sensing
capability, while interdigitated electrode (IDE) capacitors have been used as humidity
sensors for wearable applications. The effect of bending in the electrical performance
of such structures was evaluated, showing variations below 5% in both inductance and
capacitance values for bending angles in the range of interest, i.e. those fitting to human
limbs. In the case of the fabricated NFC tags, a shift in the resonance frequency below
1.7% was found, meaning that the e-textile tag would still be readable by an NFC enabled
smartphone. In respect of the capacitive humidity sensor, we obtained a
minimum capacitance variation of 40% for a relative humidity range from 10% to 90%.
Measured thermal shift was below 5% in the range from 10 to 40ºC. When compared to
the 4% variation due to bending, it can be concluded that this capacitive structure can
be harnessed as humidity sensor even under bending strain conditions and moderate
temperature variations. The development and characterization of such structures on
denim fabrics, which is one of the most popular fabrics for everyday clothing, combined
with the additional advantage of affordable and easy fabrication methodologies, means
a further step towards the next generation of smart e-textile products.},
organization = {This study was supported by projects from the Spanish government (CTQ2016-78754-
C2-1-R and EQC2018-004937-P). These projects were partially supported by European
Regional Development Funds (ERDF). P. Escobedo wants to thank to the Spanish
Ministry of Education, Culture and Sport for a R&D predoctoral grant (FPU13/05032).},
publisher = {SAGE Publications},
keywords = {Denim fabric},
keywords = {Planar coil inductor},
keywords = {Interdigitated electrode capacitor},
title = {The effect of bending on laser-cut electro-textile inductors and capacitors attached on denim as wearable structures},
author = {Escobedo Araque, Pablo and Pablos Florido, Jaime de and Carvajal Rodríguez, Miguel Ángel and Martínez Olmos, Antonio and Capitán Vallvey, Luis Fermín and Palma López, Alberto José},
}