TY - JOUR
T1 - Development of sodium and potassium ion-selective electrodes based on laser induced graphene
AU - Choi, Jaesung
AU - Han, Ji Hoon
AU - Kim, Taeheon
AU - Jungho Pak, James
N1 - Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2017R1A2B 4009088, “Development of IoT-based wearable multi-sensor for human sweat analysis using laser-induced graphene electrode”)
PY - 2019
Y1 - 2019
N2 - This paper describes the development of sodium and potassium ion-selective electrodes (Na+ and K+ ISEs) based on laser-induced graphene (LIG), which can selectively detect sodium and potassium ions in body fluids. LIG was formed on commercial polyimide film using a computer-controlled CO2 infrared laser and was characterized by FE-SEM and Raman spectroscopy. The results show that the LIG was composed of three-dimensional randomly stacked porous graphene layers. To minimize the potential drift of the ISEs, PEDOT:PSS was electrically polymerized on LIG working electrodes using potentiometry method and EIS spectrum confirmed that the LIG/PEDOT:PSS electrode has lower charge transfer resistance than pure LIG electrode. Na+ and K+ ISEs were made by drop casting the ion-selective membrane cocktail over the PEDOT:PSS layer. The fabricated Na+ and K+ ISEs show high sensitivity (63.08 mV/dec, 63.80 mV/dec), low detection limit (10-5.0 M), wide linear range (10-5 M to 10-1 M), and excellent selectivity of Na+ and K+ against NH4+, Mg2+ and Ca2+. Combined with the advantages of a one-step processing of LIG, we expect this work to promote future applications in micro devices for commercial applications.
AB - This paper describes the development of sodium and potassium ion-selective electrodes (Na+ and K+ ISEs) based on laser-induced graphene (LIG), which can selectively detect sodium and potassium ions in body fluids. LIG was formed on commercial polyimide film using a computer-controlled CO2 infrared laser and was characterized by FE-SEM and Raman spectroscopy. The results show that the LIG was composed of three-dimensional randomly stacked porous graphene layers. To minimize the potential drift of the ISEs, PEDOT:PSS was electrically polymerized on LIG working electrodes using potentiometry method and EIS spectrum confirmed that the LIG/PEDOT:PSS electrode has lower charge transfer resistance than pure LIG electrode. Na+ and K+ ISEs were made by drop casting the ion-selective membrane cocktail over the PEDOT:PSS layer. The fabricated Na+ and K+ ISEs show high sensitivity (63.08 mV/dec, 63.80 mV/dec), low detection limit (10-5.0 M), wide linear range (10-5 M to 10-1 M), and excellent selectivity of Na+ and K+ against NH4+, Mg2+ and Ca2+. Combined with the advantages of a one-step processing of LIG, we expect this work to promote future applications in micro devices for commercial applications.
KW - Ion-selective electrode
KW - Laser Induced Graphene
KW - PEDOT: PSS
KW - PI film
KW - Potassium
KW - Sodium
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U2 - 10.5370/KIEE.2019.68.7.860
DO - 10.5370/KIEE.2019.68.7.860
M3 - Article
AN - SCOPUS:85070935496
VL - 68
SP - 860
EP - 865
JO - Transactions of the Korean Institute of Electrical Engineers
JF - Transactions of the Korean Institute of Electrical Engineers
SN - 1975-8359
IS - 7
ER -