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Related Experiment Video

Updated: Aug 5, 2025

Implementation of a Reference Interferometer for Nanodetection
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A robust SERS calibration using a pseudo-internal intensity reference.

Meng Zhang1, Jingran Yang1, Longkun Yang1

  • 1Beijing Key Laboratory of Nano-Photonics and Nano-Structure (NPNS), Department of Physics, Capital Normal University, Beijing 100048, China. zpli@cnu.edu.cn.

Nanoscale
|March 27, 2023
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Summary
This summary is machine-generated.

A new referenced measurement method enhances Surface-Enhanced Raman Scattering (SERS) quantification. This robust calibration technique improves accuracy for detecting molecules like R6G across a wide concentration range.

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy

Background:

  • Surface-enhanced Raman scattering (SERS) offers high sensitivity and specificity for molecular analysis.
  • Quantification in SERS is challenging due to calibration curve instability.

Purpose of the Study:

  • To develop a robust calibration method for quantitative SERS analysis.
  • To address the challenge of calibration curve vulnerability in SERS measurements.

Main Methods:

  • Introduction of a referenced measurement as an intensity standard.
  • Utilizing a pseudo-internal standard approach to normalize SERS intensity.
  • Evaluating R6G concentration using the normalized calibration curve.

Main Results:

  • The referenced measurement method provides a stable intensity standard.
  • Accurate quantification of R6G concentration from 10⁻⁷ M to 10⁻¹² M was achieved.
  • The method demonstrated effectiveness with different reference molecules.

Conclusions:

  • A robust and reliable calibration method for SERS quantification has been established.
  • This pseudo-internal standard approach overcomes limitations of traditional internal standards.
  • The developed method is beneficial for advancing quantitative SERS applications.