Three Steps of Hierarchical Self Assembly Toward a Stable and Efficient Surface Enhanced Raman Spectroscopy Platform
| Autor: | Igor Dzięcielewski, Witold Adamkiewicz, Robert Hołyst, Krzysztof Sozanski, Agnieszka Kamińska, Jan Paczesny, Monika Wadowska, Katarzyna Winkler |
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| Rok vydání: | 2012 |
| Předmět: |
Nanostructure
Fabrication Materials science General Chemical Engineering Nanowire Gallium nitride Nanotechnology 02 engineering and technology General Chemistry Chemical vapor deposition Surface-enhanced Raman spectroscopy 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Colloidal gold Materials Chemistry Self-assembly 0210 nano-technology |
| Zdroj: | Chemistry of Materials |
| ISSN: | 1520-5002 0897-4756 |
| Popis: | We report an innovative application of a true “bottom-up” approach for preparation of functional material. Three consecutive self-assembly steps were utilized for formation of a complex surface enhanced Raman spectroscopy (SERS) platform. First the Langmuir–Blodgett technique was used to deposit gold nanoparticles on a solid substrate. Thus prepared surfaces were afterward used as substrates in the chemical vapor deposition process of gallium nitride (GaN) nanowire growth. On such scaffolding, a third step of material fabrication was performed. Gold microflowers (Au MFs) deposited from solution preferably appeared at the top of the GaN nanowires and not in the cavities in between. The obtained morphology of the final material was controlled at each step of the preparation process to tailor its properties for desired purposes. Prepared surfaces were tested as SERS platforms. The enhancement factor was around 107 in case of p-mercaptobenzoic acid (p-MBA). The platforms were also suitable for biological and ... |
| Databáze: | OpenAIRE |
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