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Caland JP, Baptista J, Peiter GC, de Aguiar KMFR, Coelho-Júnior H, Sinnecker JP, Felix JF, Schneider R. Nanostructured Glass-Ceramic Materials from Glass Waste with Antimicrobial Activity. Molecules 2024; 29:3212. [PMID: 38999164 DOI: 10.3390/molecules29133212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 06/18/2024] [Accepted: 06/26/2024] [Indexed: 07/14/2024] Open
Abstract
Modern consumption patterns have led to a surge in waste glass accumulating in municipal landfills, contributing to environmental pollution, especially in countries that do not have well-established recycling standards. While glass itself is 100% recyclable, the logistics and handling involved present significant challenges. Flint and amber-colored glass, often found in high quantities in municipal waste, can serve as valuable sources of raw materials. We propose an affordable route that requires just a thermal treatment of glass waste to obtain glass-based antimicrobial materials. The thermal treatment induces crystallized nanoregions, which are the primary factor responsible for the bactericidal effect of waste glass. As a result, coarse particles of flint waste glass that undergo thermal treatment at 720 °C show superior antimicrobial activity than amber waste glass. Glass-ceramic materials from flint waste glass, obtained by thermal treatment at 720 °C during 2 h, show antimicrobial activity against Escherichia coli after just 30 min of contact time. Laser-induced breakdown spectroscopy (LIBS) was employed to monitor the elemental composition of the glass waste. The obtained glass-ceramic material was structurally characterized by transmission electron microscopy, enabling the confirmation of the presence of nanocrystals embedded within the glass matrix.
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Affiliation(s)
- Juliani P Caland
- Núcleo de Física Aplicada, Instituto de Física, Brasília, Universidade de Brasília-UnB, Brasilia 70910-900, DF, Brazil
| | - João Baptista
- Group of Polymers and Nanostructures, Universidade Tecnológica Federal do Paraná-UTFPR, Toledo 85902-490, PR, Brazil
| | - Gabrielle Caroline Peiter
- Group of Polymers and Nanostructures, Universidade Tecnológica Federal do Paraná-UTFPR, Toledo 85902-490, PR, Brazil
| | - Kelen M F Rossi de Aguiar
- Group of Polymers and Nanostructures, Universidade Tecnológica Federal do Paraná-UTFPR, Toledo 85902-490, PR, Brazil
| | | | - João P Sinnecker
- Brazilian Center for Physics Research, Rio de Janeiro 22290-180, RJ, Brazil
| | - Jorlandio F Felix
- Núcleo de Física Aplicada, Instituto de Física, Brasília, Universidade de Brasília-UnB, Brasilia 70910-900, DF, Brazil
| | - Ricardo Schneider
- Group of Polymers and Nanostructures, Universidade Tecnológica Federal do Paraná-UTFPR, Toledo 85902-490, PR, Brazil
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Lo Faro MJ, Ielo I, Morganti D, Leonardi AA, Conoci S, Fazio B, De Luca G, Irrera A. Alkoxysilane-Mediated Decoration of Si Nanowires Vertical Arrays with Au Nanoparticles as Improved SERS-Active Platforms. Int J Mol Sci 2023; 24:16685. [PMID: 38069007 PMCID: PMC10706837 DOI: 10.3390/ijms242316685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/15/2023] [Accepted: 11/21/2023] [Indexed: 12/18/2023] Open
Abstract
The search for improved transducers to fabricate better-performing (bio)sensors is a challenging but rewarding endeavor aiming to better diagnose and treat diseases. In this paper, we report on the decoration of a dense vertical array of ultrathin silicon nanowires (Si NWs), produced by metal-assisted chemical etching, with 20 nm gold nanoparticles (Au NPs) for surface-enhanced Raman scattering (SERS) applications. To optimize the production of a uniform 3D SERS active platform, we tested different Si NW surface functionalizations with various alkoxysilanes before Au decoration. Scanning electron microscopy investigations confirm that Au NPs decorate both bare and (3-glycidiloxypropyl)trimethoxysilane (GPTMS)-modified Si NWs with a high surface coverage uniformity. The SERS response of the decorated NWs was probed using a model dye system (methylene blue; MB) at 633 and 785 nm excitation wavelengths. The GPTMS-modified NWs present the highest enhancements of 2.9 and 2.6 for the 450 cm-1 and 1625 cm-1 peaks under 785 nm excitation and of 10.8 and 5.3 for the 450 cm-1 and 1625 cm-1 peaks under 633 nm excitation. These results demonstrate the perspective role of Si NWs decorated with Au NPs as a low-cost 3D SERS platform.
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Affiliation(s)
- Maria Josè Lo Faro
- Dipartimento di Fisica e Astronomia “Ettore Majorana”, Università degli Studi di Catania, 95123 Catania, Italy;
- Istituto per la Microelettronica e Microsistemi, CNR-IMM Catania Università, 95121 Catania, Italy
| | - Ileana Ielo
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche, ed Ambientali, Università degli Studi di Messina, 98166 Messina, Italy; (I.I.); (D.M.); (S.C.)
| | - Dario Morganti
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche, ed Ambientali, Università degli Studi di Messina, 98166 Messina, Italy; (I.I.); (D.M.); (S.C.)
| | | | - Sabrina Conoci
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche, ed Ambientali, Università degli Studi di Messina, 98166 Messina, Italy; (I.I.); (D.M.); (S.C.)
- URT LAB SENS CNR and Beyond Nano, CNR, 98166 Messina, Italy; (A.A.L.); (B.F.)
- Istituto per la Microelettronica e Microsistemi, CNR-IMM Zona Industriale, 95121 Catania, Italy
| | - Barbara Fazio
- URT LAB SENS CNR and Beyond Nano, CNR, 98166 Messina, Italy; (A.A.L.); (B.F.)
| | - Giovanna De Luca
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche, ed Ambientali, Università degli Studi di Messina, 98166 Messina, Italy; (I.I.); (D.M.); (S.C.)
- URT LAB SENS CNR and Beyond Nano, CNR, 98166 Messina, Italy; (A.A.L.); (B.F.)
| | - Alessia Irrera
- URT LAB SENS CNR and Beyond Nano, CNR, 98166 Messina, Italy; (A.A.L.); (B.F.)
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