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CD Spectroscopy to Study DNA-Protein Interactions
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S-CdIn

Wenjing Lai1, Shijie Yan1, Min Wang1

  • 1School of Chemistry and Chemical Engineering, State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi, 832003, PR China.

Biosensors & Bioelectronics
|June 4, 2023
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Summary
This summary is machine-generated.

Hollow spindle cadmium indium sulfide (S-CIS) enables sensitive near-infrared electrochemiluminescence (ECL) detection at low potentials. This S-CIS material is used in a dual-mode sensing platform for highly accurate alpha-fetoprotein (AFP) detection.

Keywords:
Alpha-fetoproteinDual-modeElectrochemical impedance spectroscopyElectrochemiluminescenceNovel emitter

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Biomedical Engineering

Background:

  • Ternary metal sulfides like CdIn2S4 offer tunable optical properties for novel electrochemiluminescence (ECL) emitters.
  • Developing efficient near-infrared (NIR) ECL materials is crucial for sensitive biosensing applications.

Purpose of the Study:

  • To synthesize hollow spindle cadmium indium sulfide (S-CIS) via hydrothermal methods.
  • To investigate the ECL properties of S-CIS, particularly its low excitation potential and NIR emission.
  • To develop a dual-mode sensing platform using S-CIS for alpha-fetoprotein (AFP) detection.

Main Methods:

  • Hydrothermal synthesis of hollow spindle CdIn2S4 (S-CIS).
  • Characterization of S-CIS for ECL emission and optical properties.
  • Construction of a dual-mode sensing platform integrating electrochemical impedance spectroscopy (EIS) and ECL.
  • Detection of AFP using the developed sensing platform.

Main Results:

  • S-CIS exhibits strong NIR ECL emission at a low excitation potential (-1.3 V) using K2S2O8.
  • The ECL mechanism is attributed to surface state transitions, with S-CIS showing excellent NIR characteristics.
  • The dual-mode sensing platform achieved high accuracy and sensitivity for AFP detection, with detection limits of 0.862 pg mL⁻¹ (ECL) and 16.8 fg mL⁻¹ (EIS).

Conclusions:

  • S-CIS is a promising NIR emitter for developing simple, efficient, and ultrasensitive dual-mode sensing platforms.
  • The low excitation potential of S-CIS minimizes biomolecule damage, preserving biological activity.
  • This study highlights the potential of S-CIS in clinical diagnostics and early disease detection.