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Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
Published on: May 28, 2016
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Polydopamine-Enabled Approach toward Tailored Plasmonic Nanogapped Nanoparticles: From Nanogap Engineering to
Jiajing Zhou1, Qirong Xiong1, Jielin Ma1
1School of Chemical and Biomedical Engineering, Nanyang Technological University , Singapore 637457.
ACS Nano
|December 28, 2016
Summary
We developed a versatile platform for creating core-shell plasmonic nanoparticles with tunable nanogaps using polydopamine. This enables advanced applications in sensing and theranostics through enhanced surface-enhanced Raman scattering (SERS).
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Plasmonic nanoparticles with nanogaps are crucial for advanced applications.
- Controlling nanogap size and functionality is challenging with conventional methods.
Purpose of the Study:
- To present a flexible platform strategy for synthesizing core-shell plasmonic nanoparticles with built-in nanogaps.
- To demonstrate the utility of polydopamine in controlling nanogap properties and enabling new nanoparticle architectures.
Main Methods:
- Utilized polydopamine as a nanoscale spacer, redox-active coating, and reactive scaffold.
- Developed a method for synthesizing multishell and hybrid nanogapped nanoparticles (NNPs).
- Applied the synthesized NNPs for ultrasensitive SERS detection and photothermal killing of pathogens.
Main Results:
- Achieved controllable nanogap sizes using polydopamine.
- Demonstrated the synthesis of multishell and multifunctional hybrid NNPs with diverse cores.
- Obtained highly active SERS signals and efficient photothermal killing of food-borne pathogens.
Conclusions:
- The polydopamine-based platform offers diverse flexibility in tailoring plasmonic nanogapped nanoparticles (NNPs).
- These internally coupled plasmonic NNPs show great promise for sensing, optoelectronics, and theranostics.
- The strategy allows for customized synthesis of complex nanostructures not accessible by conventional methods.
