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Welded Gold Nanoparticle Assemblies Defined Plasmonic Coupling
Xiaoliang Chen1, Longjiang Ding1, Yue Wang2
1School of Chemistry and Chemical Engineering, New Cornerstone Science Laboratory, Frontiers Science Center for Transformative Molecules, Zhang Jiang Institute for Advanced Study and National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai 200240, China.
Researchers developed a DNA-encoded method to weld gold nanoparticles into continuous 3D nanostructures. This technique achieves over 90% welding efficiency, enabling tunable plasmonic properties for nanomaterials.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Nanoparticle assemblies are vital for nanodevices, but creating continuous 3D structures with ohmic contacts is difficult.
- DNA-programmable nanoparticle assembly has advanced, yet seamless welding of discrete components remains a challenge.
Purpose of the Study:
- To introduce a single-stranded DNA-encoded strategy for customizing welded metal nanostructures.
- To achieve tunable morphologies and plasmonic properties in nanoparticle assemblies.
Main Methods:
- Utilized a single-stranded DNA-encoded strategy for chemical welding of gold nanoparticle assemblies in solution.
- Demonstrated welding of various gold nanoparticle sizes and shapes into defined nanostructures.
Main Results:
- Achieved over 90% welding efficiency for gold nanoparticle assemblies into continuous nanostructures (rod-like, triangular, tetrahedral).
- Welded assemblies exhibited consistent morphology and defined plasmonic coupling, confirmed by experiment and simulation.
- Showcased the versatility of the DNA-encoded welding strategy for diverse nanoparticle configurations.
Conclusions:
- The single-stranded DNA-encoded welding system offers a novel approach for fabricating functional plasmonic nanomaterials.
- This method facilitates precise construction of complex 3D nanostructures with interparticle ohmic contacts.
- The developed technique holds potential for advancing nanodevice fabrication and plasmonic material design.
