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Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle
Published on: September 22, 2015
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Local structural changes in graphene oxide layers induced by silver nanoparticles.
Prompong Pienpinijtham1, Sanpon Vantasin, Oraporn Wong-U-Ra
1Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan. ozaki@kwansei.ac.jp.
Physical Chemistry Chemical Physics : PCCP
|August 10, 2018
Summary
Silver nanoparticles induce structural changes in graphene oxide (GO) layers, affecting carbon bonds and causing flattening and bending. These effects extend beyond the nanoparticle size, impacting nanocomposite properties.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Graphene oxide (GO) is a versatile material with tunable properties.
- Silver/graphene oxide (AGO) nanocomposites offer potential for advanced applications.
- Understanding structural modifications in AGO is crucial for property control.
Purpose of the Study:
- To investigate the structural changes in graphene oxide (GO) within silver/graphene oxide (AGO) nanocomposites.
- To elucidate the nanoscale effects of silver nanoparticles (AgNPs) on GO structure.
- To establish a model for GO structural alterations in AGO.
Main Methods:
- Tip-enhanced Raman scattering (TERS) microscopy was employed.
- Line-profile TERS spectra were acquired from AgNPs on GO layers.
- High spatial resolution analysis was utilized to probe molecular information.
Main Results:
- AgNPs caused shortening of C-C bonds and flattening of GO beneath them.
- Critical bending of GO layers was observed around AgNPs.
- Structural changes propagated up to 200-250 nm from AgNPs, exceeding nanoparticle dimensions.
Conclusions:
- AgNPs significantly alter GO structure at the nanoscale.
- A model for GO structural changes in AGO nanocomposites was proposed.
- This research contributes to the development of advanced nanostructures and nanocomposites.
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