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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Accardo, Angelo
Delft University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2024Curvature tuning through defect-based 4D printingcitations
- 2024Bone cell response to additively manufactured 3D micro-architectures with controlled Poisson's ratiocitations
- 20244D Printing for Biomedical Applicationscitations
- 2023Auxeticity as a Mechanobiological Tool to Create Meta-Biomaterialscitations
- 2023Micro 3D Printing Elastomeric IP-PDMS Using Two-Photon Polymerisationcitations
- 2022Two-Photon Polymerization of 2.5D and 3D Microstructures Fostering a Ramified Resting Phenotype in Primary Microgliacitations
- 2022Engineered cell culture microenvironments for mechanobiology studies of brain neural cellscitations
- 2020Aerosol Direct Writing and Thermal Tuning of Copper Nanoparticle Patterns as Surface-Enhanced Raman Scattering Sensorscitations
- 2017Multi-photon Direct Laser Writing and 3D Imaging of Polymeric Freestanding Architectures for Cell Colonizationcitations
Places of action
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article
Aerosol Direct Writing and Thermal Tuning of Copper Nanoparticle Patterns as Surface-Enhanced Raman Scattering Sensors
Abstract
Surface-enhanced Raman scattering (SERS) substrates are of great interest for detecting low-concentrated analytes. However, issues such as multistep processing, cost, and possible presence of hazardous substances in the fabrication still represent a significant drawback. In this paper, an innovative direct writing method is introduced for solvent-free and spatially selective deposition of fine metal copper nanoparticles (CuNPs), with size distribution below 20 nm, generated in-line through a spark ablation method (SAM). The deposited CuNPs' morphology and composition were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), and energy-dispersive X-ray spectroscopy (EDS). The resulting CuNP patterns feature porous 3D microdomains with nanometric structures serving as hot spots for Raman signal enhancement. Low-temperature post-treatment (below 200 °C) of the deposited CuNPs significantly evolves its morphology and leads to sintering of NPs into a semicrystalline structure with sharp geometric features, which resulted in a more than 10-fold increase of the enhancement factor (up to 2.1 × 105) compared to non-heat-treated samples. The proposed method allows creating SERS substrates constituted by sharp 3D metallic nanopatterns selectively deposited onto specific regions, which paves the way for new printed, highly sensitive SERS-based sensors. ; Micro and Nano Engineering