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Open AccessFeature PaperArticle

Fractal Silver Dendrites as 3D SERS Platform for Highly Sensitive Detection of Biomolecules in Hydration Conditions

1
Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia 64, 95123 Catania, Italy
2
CNR - IPCF, Istituto per I Processi Chimico-Fisici, viale F. Stagno d’Alcontres 37, 98158 Messina, Italy
3
CNR - MATIS IMM, Istituto per la Microelettronica e Microsistemi, via S. Sofia 64, 95123 Catania, Italy
4
CNR - IFAC, Istituto di Fisica Applicata “Nello Carrara”, Via Madonna del Piano, 10, I-50019 Sesto Fiorentino, Italy
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(11), 1630; https://doi.org/10.3390/nano9111630
Received: 8 November 2019 / Accepted: 14 November 2019 / Published: 16 November 2019
(This article belongs to the Special Issue Nanomaterials Based on IV-Group Semiconductors)
In this paper, we report on the realization of a highly sensitive and low cost 3D surface-enhanced Raman scattering (SERS) platform. The structural features of the Ag dendrite network that characterize the SERS material were exploited, attesting a remarked self-similarity and scale invariance over a broad range of length scales that are typical of fractal systems. Additional structural and optical investigations confirmed the purity of the metal network, which was characterized by low oxygen contamination and by broad optical resonances introduced by the fractal behavior. The SERS performances of the 3D fractal Ag dendrites were tested for the detection of lysozyme as probe molecule, attesting an enhancement factor of ~2.4 × 106. Experimental results assessed the dendrite material as a suitable SERS detection platform for biomolecules investigations in hydration conditions. View Full-Text
Keywords: Ag dendrites; fractal; SERS; hydrated protein; lysozyme Ag dendrites; fractal; SERS; hydrated protein; lysozyme
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MDPI and ACS Style

Lo Faro, M.J.; D’Andrea, C.; Leonardi, A.A.; Morganti, D.; Irrera, A.; Fazio, B. Fractal Silver Dendrites as 3D SERS Platform for Highly Sensitive Detection of Biomolecules in Hydration Conditions. Nanomaterials 2019, 9, 1630.

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