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Related Concept Videos

Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

601
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.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
601
Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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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...
532

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Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle
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Real-time reduction of graphene oxide using Raman spectroscopy.

Mohammed Alyami1, Satam Alotibi1, Ibrahim Olanrewaju Alade2

  • 1Physics Department, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, 11942, Saudi Arabia.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|August 5, 2025
PubMed
Summary

Laser irradiation offers a rapid, non-toxic method for reducing graphene oxide (GO) to reduced graphene oxide (rGO). This in-situ technique enables precise microscale rGO engineering for advanced electronic and energy applications.

Keywords:
Graphene oxideLaser irradiationRaman spectroscopyReduced graphene oxide

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Spectroscopy

Background:

  • Graphene oxide (GO) requires reduction to reduced graphene oxide (rGO) to regain its functional properties.
  • Conventional reduction methods can be toxic or lack spatial control.

Purpose of the Study:

  • To develop an in-situ laser irradiation method for GO reduction during Raman spectroscopy.
  • To investigate the effects of laser power density on GO reduction and rGO properties.
  • To demonstrate spatially controlled rGO formation at the microscale.

Main Methods:

  • In-situ laser irradiation of GO during Raman spectroscopy measurements.
  • Varying laser power densities from 3.2 × 10⁵ to 3.2 × 10⁶ W/cm² (2.5-25 mW).
  • Monitoring structural transformations using optical microscopy and Raman spectral analysis (deconvolution into D, D∗, D″, G, D′ bands).

Main Results:

  • Laser power density directly influences GO reduction, with higher powers yielding better results.
  • Observed increases in intensity ratio ID∗/IG (0.12 to 0.42) and area ratio AD∗/AD

Conclusions:

  • Laser-induced reduction is a rapid, non-toxic, and spatially precise method for GO to rGO conversion.
  • This technique allows for microscale engineering of rGO.
  • The developed method is suitable for applications in flexible electronics and energy storage.