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Related Concept Videos

Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

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The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
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Raman Spectroscopy Instrumentation: Overview01:26

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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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Emotional labeling is a cognitive process that involves identifying and naming one's emotions, such as anger, fear, happiness, or sadness. It allows individuals to recognize and express their internal emotional states, a critical aspect of emotional regulation and communication. Labeling emotions requires more than mere recognition; it also involves drawing upon memory and contextual cues to understand the current situation and apply a corresponding emotional label. For instance, feeling...
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DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
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A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
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Raman encoding for security labels: a review.

Dong Yu1,2, Wei Zhu1, Ai-Guo Shen1,2

  • 1School of Bioengineering and Health, Wuhan Textile University Wuhan 430220 China weiz@wtu.edu.cn.

Nanoscale Advances
|November 29, 2023
PubMed
Summary
This summary is machine-generated.

Raman encoding offers robust security for labels in medicine, jewelry, and food. This review covers its preparation, verification, and future improvements for advanced anti-counterfeiting applications.

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Optics

Background:

  • Raman encoding leverages unique molecular fingerprints for high stability and multiplexing.
  • Security labels are evolving from fixed to random patterns for enhanced anti-counterfeiting.
  • Applications span medical safety, jewelry identification, and food supervision.

Purpose of the Study:

  • To comprehensively review Raman encoding-based security labels.
  • To summarize label preparation, anti-counterfeiting modes, and image verification.
  • To discuss current limitations and future prospects.

Main Methods:

  • Review of recent advancements in Raman encoding for security labels.
  • Analysis of different anti-counterfeiting modes (specific vs. random patterns).
  • Summarization of essential elements for various label types.

Main Results:

  • Raman encoding is crucial for both specific and random pattern-based security labels.
  • The review details the role of Raman encoding across different anti-counterfeiting strategies.
  • Key elements and preparation methods for diverse label applications are outlined.

Conclusions:

  • Raman encoding is a versatile technology for advanced security labels.
  • Further improvements are needed to enhance anti-counterfeiting performance.
  • Future research should focus on overcoming current drawbacks and exploring new applications.