Surface-enhanced Raman scattering sensor for quantitative detection of trace Pb2+ in water

Zhou, Runzi; Chen, Wen; Lv, Jiameng; Xu, Haijun; Qiu, Zenghui; Wu, Zhigang; Zhang, Xin

doi:10.1016/j.cplett.2023.140324

Cited by 7 publications

(2 citation statements)

References 35 publications

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“…14 Many sensor methods have been developed for the detection of heavy metal ions, such as atomic absorption spectrometry, 15 electrochemistry, 16 uorescence, 17,18 inductively coupled plasma mass spectrometry, 19 ion printing technology, 20 and surface-enhanced Raman scattering (SERS). 21 However, these methods have disadvantages such as expensive and sensitive devices, complex procedures, and limitations in the laboratory. Colorimetric sensors provide a great advantage in their ability to be detected quickly and with the naked eye.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of B, S, and N-doped carbon quantum dots for colorimetric sensing of heavy metal ions

Aygun,

Cobas,

Tiri

et al. 2024

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Hydrothermal synthesis of B, S, and N-doped carbon quantum dots for colorimetric sensing of heavy metal ions

Aygun,

Cobas,

Tiri

et al. 2024

RSC Adv.

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“…The properties of low-dimensionality systems, such as the semiconductor quantum wire (QW), allow their use in various applications, such as light sources for optoelectronic devices [1][2][3][4][5]. Therefore, both theoretical and experimental characterizations of these systems are important.…”

Section: Introductionmentioning

confidence: 99%

Effects of an external electric field on one-phonon resonant and electron Raman scattering in a semiconductor quantum wire

Betancourt-Riera,

Ferrer-Moreno

et al. 2023

Mater. Res. Express

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In this work, the influence of an external electric field is studied in two cases: one-phonon resonant Raman scattering and one-phonon electron Raman scattering, processes that occur in a semiconductor quantum wire with cylindrical symmetry and finite potential barriers. Where we have considered that the electric field is homogeneous and transversal to the system axis. To carry out this study, we obtain a mathematical expression for the differential cross-section for both Raman processes, where for one-phonon resonant Raman scattering, intra-band and inter-band optical transitions are considered, while for one-phonon electron Raman scattering, only intra-band optical transitions are considered. Therefore, to determine the electronic states, we use a valid model when the electric field is weak with respect to confinement. In the case of the Fröhlich electron-phonon interaction, we use a model in which the oscillation modes are completely confined, a model that was developed within the framework of a macroscopic continuum model. Then, the singularities present in the Raman spectra and the effect of the electric field on their position and intensity are analyzed. Finally, how the electric field affects the electron-phonon interaction and the selection rules for optical transitions in a semiconductor quantum wire with cylindrical symmetry are shown.

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Rapid‐Response and Portable Lead Ion Sensor Using Co/Pt/Si Schottky Heterojunction Without Reference Electrode

Tan,

Hui,

et al. 2024

Electroanalysis

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Lead ions (Pb 2+) are classified as highly toxic heavy metals that pose substantial threats to both human health and environmental integrity. Consequently, the sensitive detection of Pb 2+, particularly at low concentrations, is imperative for the purposes of environmental surveillance and safeguarding public health. Here, we introduce a Co/Pt/Si Schottky heterostructure for a rapid, portable Pb 2+ detection sensor. One electrode of the heterojunction serves as a Pb 2+ probe, and sensor processing circuits are integrated. The Co/Pt thin films were deposited via magnetron sputtering on a Si(100) substrate, followed by heterojunction fabrication using semiconductor process technology. The sensor is functionalized with a glutathione‐modified gold electrode, leveraging the sulfur‐donor properties of cysteine in glutathione and the electron‐acceptor behavior of Pb 2+ ions. This interaction modulates the gold electrode's surface potential, altering the current‐voltage rectification of the Co/Pt/Si heterojunction. A two‐terminal configuration enables current signal readout without reference electrodes. The sensor demonstrates a linear response to Pb 2+ concentrations ranging from 1 × 10 ‐8 to 1 × 10 ‐3 mol/L, with high selectivity attributed to the affinity of glutathione for Pb 2+. Its key benefits are the simplicity of its fabrication process and its portability, which are enhanced by the integration of measurement circuitry. This makes the sensor a promising candidate for rapid, on‐site detection of heavy metal ions in applications related to health and environmental monitoring.

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Surface-enhanced Raman scattering sensor for quantitative detection of trace Pb2+ in water

Cited by 7 publications

References 35 publications

Hydrothermal synthesis of B, S, and N-doped carbon quantum dots for colorimetric sensing of heavy metal ions

Hydrothermal synthesis of B, S, and N-doped carbon quantum dots for colorimetric sensing of heavy metal ions

Effects of an external electric field on one-phonon resonant and electron Raman scattering in a semiconductor quantum wire

Rapid‐Response and Portable Lead Ion Sensor Using Co/Pt/Si Schottky Heterojunction Without Reference Electrode

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