Monofunctional gold nanoparticles: synthesis and applications |
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Authors: | Qun Huo James G Worden |
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Institution: | (1) Nanoscience Technology Center and the Department of Chemistry, University of Central Florida, 12424 Research Parkway Suite 422, Orlando, FL 32826, USA |
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Abstract: | The ability to control the assembly of nanoparticle building blocks is critically important for the development of new materials
and devices. The properties and functions of nanomaterials are not only dependent on the size and properties of individual
particles, but also the interparticle distance and interactions. In order to control the structures of nanoassemblies, it
is important to first achieve a precise control on the chemical functionality of nanoparticle building blocks. This review
discusses three methods that have been reported recently for the preparation of monofunctional gold nanoparticles, i.e., nanoparticles
with a single chemical functional group attached to each particle. The advantages and disadvantages of the three methods are
discussed and compared. With a single functional group attached to the surface, one can treat such nanoparticles as molecular
building blocks to react with other molecules or nanoparticles. In other words, by using appropriate chemical reactions, nanoparticles
can be linked together into nanoassemblies and materials by covalent bonds, similar to the total chemical synthesis of complicated
organic compounds from smaller molecular units. An example of using this approach for the synthesis of nanoparticle/polymer
hybrid materials with optical limiting properties is presented. Other potential applications and advantages of covalent bond-based
nanoarchitectures vs. non-covalent interaction-based supramolecular self-assemblies are also discussed briefly in this review. |
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Keywords: | monolayer gold nanoparticles monofunctional solid phase synthesis Brust– Schiffrin reaction nanoassembling nanostructure |
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