TY - JOUR
T1 - Design, fabrication, and characterization of Hg2+ sensor based on graphite oxide and metallic nanoclusters
AU - Said, Abdul Rehman
AU - Said, Khadija
AU - Awwad, Falah
AU - Qamhieh, Naser N.
AU - Mahmoud, Saleh T.
AU - Meetani, Mohammed A.
AU - Tariq, Saeed
AU - Ayesh, Ahmad I.
N1 - Funding Information:
The authors would like to acknowledge the financial support by United Arab Emirates University with Fund number 31R006 & 31N187 .
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - In this paper, sensors with field-effect transistor structure have been developed to detect low concentration of mercury ions (Hg2+) in water. These sensors are based on graphite oxide decorated with silver nanoclusters, where the change in the electrical current signal is the sensing parameter. By utilizing thermal evaporation process, interdigitated electrodes of gold were deposited on the surface of the sensor substrates. Graphite oxide (GO) was assembled between the interdigitated electrodes. Silver nanoclusters were generated inside an ultra-high vacuum (UHV) compatible system by sputtering and inert-gas condensation technique; then they were self-assembled on top of the graphite oxide. Each sensor was subjected to different concentrations of Hg2+ to test its sensitivity. The sensors showed better performance when incorporating silver nanoclusters with graphite oxide. The selectivity of the fabricated sensors was further investigated by testing different metal ions, and it revealed optimum response to Hg2+ among other metal ions, which makes them preferable for practical applications.
AB - In this paper, sensors with field-effect transistor structure have been developed to detect low concentration of mercury ions (Hg2+) in water. These sensors are based on graphite oxide decorated with silver nanoclusters, where the change in the electrical current signal is the sensing parameter. By utilizing thermal evaporation process, interdigitated electrodes of gold were deposited on the surface of the sensor substrates. Graphite oxide (GO) was assembled between the interdigitated electrodes. Silver nanoclusters were generated inside an ultra-high vacuum (UHV) compatible system by sputtering and inert-gas condensation technique; then they were self-assembled on top of the graphite oxide. Each sensor was subjected to different concentrations of Hg2+ to test its sensitivity. The sensors showed better performance when incorporating silver nanoclusters with graphite oxide. The selectivity of the fabricated sensors was further investigated by testing different metal ions, and it revealed optimum response to Hg2+ among other metal ions, which makes them preferable for practical applications.
KW - Graphite oxide
KW - Inert-gas condensation
KW - Mercury sensor
KW - Silver nanoclusters
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U2 - 10.1016/j.sna.2018.01.033
DO - 10.1016/j.sna.2018.01.033
M3 - Article
AN - SCOPUS:85041466426
SN - 0924-4247
VL - 271
SP - 270
EP - 277
JO - Sensors and Actuators, A: Physical
JF - Sensors and Actuators, A: Physical
ER -