TY - JOUR
T1 - N/S co-doped carbon dots-based solution-gated graphene transistors (SGGT) for ultra-sensitive and selective determination of Hg (II) ions in real water and serum samples
AU - Xue, Chenglong
AU - Ren, Zhanpeng
AU - Wang, Jiaying
AU - Deng, Minghua
AU - Li, Jiashen
AU - Wang, Xianbao
A2 - Li, Jinhua
PY - 2024/6/1
Y1 - 2024/6/1
N2 - The conventional methods for detecting Hg2+ ions are generally impaired by low sensitivity, a high limit of detection (LOD), and the long detection time required. In this work, we develop a novel solution gated graphene transistor (SGGT) based on carbon dots doped with N and S elements (N/S CDs) as gate electrode probes. The prepared N/S CDs, which are 3–5 nm in diameter, are first modified at the gate of the SGGT through covalent bonding that specifically recognizes Hg2+ ions. The SGGT is then used as a Hg2+ sensor, exhibiting good selectivity, ultrahigh sensitivity, good reproducibility, and a short detection time. The SGGT sensor has an excellent linear detection range, from 0.1 fM to 1 nM. The LOD can reach 28 aM, which is far lower than that of conventional detection methods. Moreover, the SGGT sensor also has a rapid response time of ∼ 40 s. Finally, the ability to analyze real water samples and serum samples is demonstrated.
AB - The conventional methods for detecting Hg2+ ions are generally impaired by low sensitivity, a high limit of detection (LOD), and the long detection time required. In this work, we develop a novel solution gated graphene transistor (SGGT) based on carbon dots doped with N and S elements (N/S CDs) as gate electrode probes. The prepared N/S CDs, which are 3–5 nm in diameter, are first modified at the gate of the SGGT through covalent bonding that specifically recognizes Hg2+ ions. The SGGT is then used as a Hg2+ sensor, exhibiting good selectivity, ultrahigh sensitivity, good reproducibility, and a short detection time. The SGGT sensor has an excellent linear detection range, from 0.1 fM to 1 nM. The LOD can reach 28 aM, which is far lower than that of conventional detection methods. Moreover, the SGGT sensor also has a rapid response time of ∼ 40 s. Finally, the ability to analyze real water samples and serum samples is demonstrated.
KW - Carbon dots
KW - Detection
KW - Hg ions
KW - SGGT
KW - Sensitivity
UR - http://www.scopus.com/inward/record.url?scp=85191181686&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/ce92d12b-e6dc-3e0f-8be1-225a2008fb0a/
U2 - 10.1016/j.microc.2024.110626
DO - 10.1016/j.microc.2024.110626
M3 - Article
SN - 0026-265X
VL - 201
JO - Microchemical Journal
JF - Microchemical Journal
M1 - 110626
ER -