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Faradaurate nanomolecules: a superstable plasmonic 76.3 kDa cluster.
1Department of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, USA. amal@olemiss.edu
Journal of the American Chemical Society
|November 15, 2011
Summary
Researchers identified and characterized a large, 76.3 kDa gold nanoparticle molecule. This giant molecule exhibits plasmonic properties, offering new insights into nanomaterial optical characteristics.
Area of Science:
- Nanotechnology
- Materials Science
- Physical Chemistry
Background:
- Understanding plasmonic optical properties of nanoscale noble-metal particles is limited.
- Preparation of homogeneous materials for ensemble measurements poses challenges.
Purpose of the Study:
- To identify, isolate, and characterize a large, homogeneous gold nanoparticle.
- To investigate the emergence of plasmonic properties in such nanomolecules.
Main Methods:
- Mass spectrometry for molecular weight determination.
- Optical characterization to identify plasmonic properties.
- Isolation of a 76.3 kDa thiolate-protected gold nanoparticle.
Main Results:
- A giant gold nanoparticle molecule (76.3 kDa) was successfully isolated and characterized.
- This molecule is larger than previously known homogeneous metal-cluster compounds.
- The nanoparticle exhibited clear plasmonic properties.
Conclusions:
- The study presents the first homogeneous molecular substance with plasmonic properties.
- These findings are crucial for understanding plasmon emergence phenomena in nanomolecules.
- Availability of homogeneous samples is key to investigating the origin of these properties.
