A Simple and Highly Selective Colorimetric Sensing of Hg<sup>2+</sup> Ions Based on Anti-Aggregation of Gold Nanoparticles

Sidana, Nancy; Rajput, Prachi; Devi, Pooja; Kaur, Harminder

doi:10.1109/jsen.2022.3213686

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…As Figure d shown, the GMP-EGFET biosensor indicates good selectivity for Hg 2+ detection, because the stability constant of Cys-Hg 2+ -Cys complex is ∼10 6 times higher than that of other metal ions. ,,,, Moreover, l -Cys is a kind of cheap, nontoxic, and stable small molecule. For practical application, the repeatability, reproducibility and long-term stability of the GMP-EGFET biosensors were investigated and were comparable to that of previous reports as shown in Figure S11.…”

Section: Resultsmentioning

confidence: 99%

Extended-Gate FET Biosensor Based on GaN Micropillar Array and Polycrystalline Layer: Application to Hg²⁺ Detection in Human Urine

Zhou,

Huang,

Wang

et al. 2024

Anal. Chem.

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Owing to the separation of field-effect transistor (FET) devices from sensing environments, extended-gate FET (EGFET) biosensor features high stability and low cost. Herein, a highly sensitive EGFET biosensor based on a GaN micropillar array and polycrystalline layer (GMP) was fabricated, which was prepared by using simple one-step low-temperature MOCVD growth. In order to improve the sensitivity and detection limit of EGFET biosensor, the surface area and the electrical conductivity of extended-gate electrode can be increased by the micropillar array and the polycrystalline layer, respectively. The designed GMP-EGFET biosensor was modified with L-cysteine and applied for Hg 2+ detection with a low limit of detection (LOD) of 1 ng/L, a high sensitivity of −16.3 mV/lg(μg/L) and a wide linear range (1 ng/L-24.5 μg/L). In addition, the detection of Hg 2+ in human urine was realized with an LOD of 10 ng/L, which was more than 30 times lower than that of reported sensors. To our knowledge, it is the first time that GMP was used as extended-gate of EGFET biosensor.

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Section: Resultsmentioning

confidence: 99%

Extended-Gate FET Biosensor Based on GaN Micropillar Array and Polycrystalline Layer: Application to Hg²⁺ Detection in Human Urine

Zhou,

Huang,

Wang

et al. 2024

Anal. Chem.

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A SnO₂ Solution-Gated Transistor Biosensor With High Sensitivity and Low Operating Voltage: Application to Detect Hg²⁺

Zhou,

Zhang,

Huang

et al. 2023

IEEE Sensors J.

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A Simple and Highly Selective Colorimetric Sensing of Hg²⁺ Ions Based on Anti-Aggregation of Gold Nanoparticles

Cited by 2 publications

References 37 publications

Extended-Gate FET Biosensor Based on GaN Micropillar Array and Polycrystalline Layer: Application to Hg²⁺ Detection in Human Urine

Extended-Gate FET Biosensor Based on GaN Micropillar Array and Polycrystalline Layer: Application to Hg²⁺ Detection in Human Urine

A SnO₂ Solution-Gated Transistor Biosensor With High Sensitivity and Low Operating Voltage: Application to Detect Hg²⁺

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A Simple and Highly Selective Colorimetric Sensing of Hg2+ Ions Based on Anti-Aggregation of Gold Nanoparticles

Cited by 2 publications

References 37 publications

Extended-Gate FET Biosensor Based on GaN Micropillar Array and Polycrystalline Layer: Application to Hg2+ Detection in Human Urine

Extended-Gate FET Biosensor Based on GaN Micropillar Array and Polycrystalline Layer: Application to Hg2+ Detection in Human Urine

A SnO2 Solution-Gated Transistor Biosensor With High Sensitivity and Low Operating Voltage: Application to Detect Hg2+

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A Simple and Highly Selective Colorimetric Sensing of Hg²⁺ Ions Based on Anti-Aggregation of Gold Nanoparticles

Extended-Gate FET Biosensor Based on GaN Micropillar Array and Polycrystalline Layer: Application to Hg²⁺ Detection in Human Urine

Extended-Gate FET Biosensor Based on GaN Micropillar Array and Polycrystalline Layer: Application to Hg²⁺ Detection in Human Urine

A SnO₂ Solution-Gated Transistor Biosensor With High Sensitivity and Low Operating Voltage: Application to Detect Hg²⁺