Nanoscale topographical control of capillary assembly of nanoparticles
| Autor: | Duncan T. L. Alexander, Juergen Brugger, Olivier J. F. Martin, Valentin Flauraud, Massimo Mastrangeli, Gabriel D. Bernasconi, Elmira Shahrabi, Jérémy Butet |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Capillary action Biomedical Engineering Nanoparticle Bioengineering Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Nanolithography General Materials Science Nanometre Nanorod Electrical and Electronic Engineering 0210 nano-technology Suspension (vehicle) Nanoscopic scale Plasmon |
| Zdroj: | Nature Nanotechnology. 12:73-80 |
| ISSN: | 1748-3395 1748-3387 |
| DOI: | 10.1038/nnano.2016.179 |
| Popis: | Predetermined and selective placement of nanoparticles onto large-area substrates with nanometre-scale precision is essential to harness the unique properties of nanoparticle assemblies, in particular for functional optical and electro-optical nanodevices. Unfortunately, such high spatial organization is currently beyond the reach of top-down nanofabrication techniques alone. Here, we demonstrate that topographic features comprising lithographed funnelled traps and auxiliary sidewalls on a solid substrate can deterministically direct the capillary assembly of Au nanorods to attain simultaneous control of position, orientation and interparticle distance at the nanometre level. We report up to 100% assembly yield over centimetre-scale substrates. We achieve this by optimizing the three sequential stages of capillary nanoparticle assembly: insertion of nanorods into the traps, resilience against the receding suspension front and drying of the residual solvent. Finally, using electron energy-loss spectroscopy we characterize the spectral response and near-field properties of spatially programmable Au nanorod dimers, highlighting the opportunities for precise tunability of the plasmonic modes in larger assemblies. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink