TY - JOUR
T1 - A wireless chemical sensor featuring iron oxidenanoparticle-embedded hydrogels
AU - Song, S. H.
AU - Park, J. H.
AU - Chitnis, G.
AU - Siegel, R. A.
AU - Ziaie, B.
PY - 2014/3/31
Y1 - 2014/3/31
N2 - tIn this paper, we introduce a wireless chemical sensor based on a magnetically functionalized hydrogels(ferrogels). By embedding superparamagnetic nanoparticles into the hydrogel network and laminatingthe hydrogel on a planar coil, the swelling state of the hydrogel, which depends on the chemical envi-ronment, can be interrogated by measuring its magnetic permeability. To validate the chemical sensingprinciple, a pH sensor is fabricated using a poly(methacrylic acid-co-acrylamide) pH sensitive hydrogel,and repeatable, reversible responses are obtained to pH changes, which are easily discriminated downto 0.1 pH unit. It is anticipated that the same scheme can be applied to hydrogels sensitive to differentstimuli (e.g., glucose, specific ions, antigens, temperature, etc.), and that this sensor can be configured forimplantation and wireless monitoring.
AB - tIn this paper, we introduce a wireless chemical sensor based on a magnetically functionalized hydrogels(ferrogels). By embedding superparamagnetic nanoparticles into the hydrogel network and laminatingthe hydrogel on a planar coil, the swelling state of the hydrogel, which depends on the chemical envi-ronment, can be interrogated by measuring its magnetic permeability. To validate the chemical sensingprinciple, a pH sensor is fabricated using a poly(methacrylic acid-co-acrylamide) pH sensitive hydrogel,and repeatable, reversible responses are obtained to pH changes, which are easily discriminated downto 0.1 pH unit. It is anticipated that the same scheme can be applied to hydrogels sensitive to differentstimuli (e.g., glucose, specific ions, antigens, temperature, etc.), and that this sensor can be configured forimplantation and wireless monitoring.
KW - Chemical sensor
KW - Ferrogel
KW - Hydrogel
KW - PH sensor
KW - Superparamagnetic nanoparticles
KW - Wireless sensora
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U2 - 10.1016/j.snb.2013.12.012
DO - 10.1016/j.snb.2013.12.012
M3 - Article
AN - SCOPUS:84903730754
SN - 0925-4005
VL - 193
SP - 925
EP - 930
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
ER -