Direct laser writing of random Au nanoparticle three-dimensional structures for highly reproducible micro-SERS measurements

Abstract : Fabrication of freestanding, three-dimensional microstructures having gold nanoparticles as building blocks has been achieved using two-photon lithography. The reported constructions hold structural coherence without the need of a polymeric network to embed the nanoparticles. The Au nanoparticles are produced by radical-mediated photoreduction and immediately self-arrange in micrometre-sized cylinders, which are used as the building units of the 3D structure writing. The manufactured structures present plasmonic activity, as well as excellent properties as substrates for Surface-Enhanced Raman Spectroscopy, in key issues such as reproducibility in intensity or enhancement factor. Such is calculated to be above 8 106 for the non-resonant probe molecule trans-1,2-bis-4-pyridylethylene. The option of repeated use of the substrates is confirmed, and they are successfully applied for detection of the fungicide thiabendazole.
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https://hal-utt.archives-ouvertes.fr/hal-02308549
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Submitted on : Tuesday, October 8, 2019 - 3:43:52 PM
Last modification on : Wednesday, October 9, 2019 - 1:37:46 AM

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Irene Izquierdo-Lorenzo, Safi Jradi, Pierre-Michel Adam. Direct laser writing of random Au nanoparticle three-dimensional structures for highly reproducible micro-SERS measurements. RSC Adv., 2014, 4 (8), pp.4128-4133. ⟨10.1039/C3RA46220J⟩. ⟨hal-02308549⟩

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