TY - JOUR
T1 - Ultrasensitive micro ion selective sensor arrays for multiplex heavy metal ions detection
AU - You, Rui
AU - Li, Peng
AU - Jing, Gaoshan
AU - Cui, Tianhong
PY - 2019/3/4
Y1 - 2019/3/4
N2 - Trace heavy metal ions are probable carcinogens with concentrations at ppb levels. Ion selective electrode (ISE) technology is a conventional and widely used method to detect various ions with the advantages as rapid measurement, low power consumption and low cost. However, the detection limit of a conventional bulky ISE device is only able to reach ppm level so far, not sensitive enough for practically detecting heavy metal ions. A micro ion selective electrode (μISE) array which can realize multiplex detection of heavy metal ions on one chip is reported in this paper. Its detection limit for Pb 2+ , Cd 2+ , AsO 2 − , and Hg 2+ can reach 1, 3, 10, and 1 ppb, respectively, within the permissible limits of drinking water. The micrometer scale device arrays from microfabrication processes demonstrated enhanced sensitivity, uniformity, and reduced response time (18 s) compared to conventional ISE. Our devices showed superb selectivity, and the performance dependence on temperature and pH values was investigated as well.
AB - Trace heavy metal ions are probable carcinogens with concentrations at ppb levels. Ion selective electrode (ISE) technology is a conventional and widely used method to detect various ions with the advantages as rapid measurement, low power consumption and low cost. However, the detection limit of a conventional bulky ISE device is only able to reach ppm level so far, not sensitive enough for practically detecting heavy metal ions. A micro ion selective electrode (μISE) array which can realize multiplex detection of heavy metal ions on one chip is reported in this paper. Its detection limit for Pb 2+ , Cd 2+ , AsO 2 − , and Hg 2+ can reach 1, 3, 10, and 1 ppb, respectively, within the permissible limits of drinking water. The micrometer scale device arrays from microfabrication processes demonstrated enhanced sensitivity, uniformity, and reduced response time (18 s) compared to conventional ISE. Our devices showed superb selectivity, and the performance dependence on temperature and pH values was investigated as well.
UR - http://www.scopus.com/inward/record.url?scp=85052577813&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85052577813&partnerID=8YFLogxK
U2 - 10.1007/s00542-018-4067-z
DO - 10.1007/s00542-018-4067-z
M3 - Article
AN - SCOPUS:85052577813
VL - 25
SP - 845
EP - 849
JO - Microsystem Technologies
JF - Microsystem Technologies
SN - 0946-7076
IS - 3
ER -