TY - JOUR
T1 - QRsens
T2 - dual-purpose quick response code with built-in colorimetric sensors
AU - Escobedo, Pablo
AU - Ramos-Lorente, Celia E.
AU - Ejaz, Ammara
AU - Erenas, Miguel M.
AU - Martínez-Olmos, Antonio
AU - Carvajal, Miguel A.
AU - García-Núñez, Carlos
AU - de Orbe-Payá, Ignacio
AU - Capitán-Vallvey, Luis F.
AU - Palma, Alberto J.
N1 - Funding Information:
This study was funded by Spanish MCIN/AEI/10.13039/501100011033/ (Projects PID2019–103938RB-I00 , ECQ2018–004937-P and grant IJC2020–043307-I ) and Junta de Andalucía (Projects B-FQM-243-UGR18 , P18-RT-2961 ). The projects and the grant were partially supported by European Regional Development Funds ( ERDF ) and by European Union NextGenerationEU/PRTR.
Publisher Copyright:
© 2022 The Authors
PY - 2023/2/1
Y1 - 2023/2/1
N2 - QRsens represents a family of Quick Response (QR) sensing codes for in-situ air analysis with a customized smartphone application to simultaneously read the QR code and the colorimetric sensors. Five colorimetric sensors (temperature, relative humidity (RH), and three gas sensors (CO2, NH3 and H2S)) were designed with the aim of proposing two end-use applications for ambient analysis, i.e., enclosed spaces monitoring, and smart packaging. Both QR code and colorimetric sensing inks were deposited by standard screen printing on white paper. To ensure minimal ambient light dependence of QRsens during the real-time analysis, the smartphone application was programmed for an effective colour correction procedure based on black and white references for three standard illumination temperatures (3000, 4000 and 5000 K). Depending on the type of sensor being analysed, this integration achieved a reduction of ∼71 – 87% of QRsens's dependence on the light temperature. After the illumination colour correction, colorimetric gas sensors exhibited a detection range of 0.7–4.1%, 0.7–7.5 ppm, and 0.13–0.7 ppm for CO2, NH3 and H2S, respectively. In summary, the study presents an affordable built-in multi-sensing platform in the form of QRsens for in-situ monitoring with potential in different types of ambient air analysis applications.
AB - QRsens represents a family of Quick Response (QR) sensing codes for in-situ air analysis with a customized smartphone application to simultaneously read the QR code and the colorimetric sensors. Five colorimetric sensors (temperature, relative humidity (RH), and three gas sensors (CO2, NH3 and H2S)) were designed with the aim of proposing two end-use applications for ambient analysis, i.e., enclosed spaces monitoring, and smart packaging. Both QR code and colorimetric sensing inks were deposited by standard screen printing on white paper. To ensure minimal ambient light dependence of QRsens during the real-time analysis, the smartphone application was programmed for an effective colour correction procedure based on black and white references for three standard illumination temperatures (3000, 4000 and 5000 K). Depending on the type of sensor being analysed, this integration achieved a reduction of ∼71 – 87% of QRsens's dependence on the light temperature. After the illumination colour correction, colorimetric gas sensors exhibited a detection range of 0.7–4.1%, 0.7–7.5 ppm, and 0.13–0.7 ppm for CO2, NH3 and H2S, respectively. In summary, the study presents an affordable built-in multi-sensing platform in the form of QRsens for in-situ monitoring with potential in different types of ambient air analysis applications.
KW - colorimetric sensors
KW - colour correction
KW - QR analytical devices
KW - QR code
KW - smartphone
UR - http://www.scopus.com/inward/record.url?scp=85142314585&partnerID=8YFLogxK
U2 - 10.1016/j.snb.2022.133001
DO - 10.1016/j.snb.2022.133001
M3 - Article
AN - SCOPUS:85142314585
SN - 0925-4005
VL - 376
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
IS - Part B
M1 - 133001
ER -