Self-assembled quasi-hexagonal arrays of gold nanoparticles with small gaps for surface-enhanced Raman spectroscopy
| Autor: | Simon Dickreuter, Fatima Noureddine, Dieter P. Kern, Monika Fleischer, Emre Gürdal, Pascal Bieschke |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Silicon Physics::Optics General Physics and Astronomy Nanoparticle chemistry.chemical_element block copolymer Nanotechnology 02 engineering and technology engineering.material lcsh:Chemical technology 010402 general chemistry lcsh:Technology 01 natural sciences Full Research Paper micelle lithography symbols.namesake optical antenna lcsh:TP1-1185 General Materials Science Electrical and Electronic Engineering lcsh:Science electroless deposition lcsh:T SERS self-assembly Surface-enhanced Raman spectroscopy 021001 nanoscience & nanotechnology lcsh:QC1-999 0104 chemical sciences Nanoscience Nanolithography chemistry Colloidal gold gold nanoparticles engineering symbols Particle lcsh:Q Noble metal 0210 nano-technology Raman spectroscopy lcsh:Physics |
| Zdroj: | Beilstein Journal of Nanotechnology Beilstein Journal of Nanotechnology, Vol 9, Iss 1, Pp 1977-1985 (2018) |
| ISSN: | 2190-4286 |
| DOI: | 10.3762/bjnano.9.188 |
| Popis: | The fabrication and optical characterization of self-assembled arrangements of rough gold nanoparticles with a high area coverage and narrow gaps for surface-enhanced Raman spectroscopy (SERS) are reported. A combination of micellar nanolithography and electroless deposition (ED) enables the tuning of the spacing and size of the noble metal nanoparticles. Long-range ordered quasi-hexagonal arrays of gold nanoparticles on silicon substrates with a variation of the particle sizes from about 20 nm to 120 nm are demonstrated. By increasing the particle sizes for the homogeneously spaced particles, a large number of narrow gaps is created, which together with the rough surface of the particles induces a high density of intense hotspots. This makes the surfaces interesting for future applications in near-field-enhanced bio-analytics of molecules. SERS was demonstrated by measuring Raman spectra of 4-MBA on the gold nanoparticles. It was verified that a smaller inter-particle distance leads to an increased SERS signal. |
| Databáze: | OpenAIRE |
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