A Comparative Study of Top-Down and Bottom-Up Carbon Nanodots and Their Interaction with Mercury Ions
We report a study of carbon dots produced via bottom-up and top-down routes, carried out through a multi-technique approach based on steady-state fluorescence and absorption, time-resolved fluorescence spectroscopy, Raman spectroscopy, infrared spectroscopy, and atomic force microscopy. Our study fo...
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| Format: | Article |
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MDPI AG
2021-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/11/5/1265 |
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| author | Federico Bruno Alice Sciortino Gianpiero Buscarino Maria Laura Soriano Ángel Ríos Marco Cannas Franco Gelardi Fabrizio Messina Simonpietro Agnello |
| author_facet | Federico Bruno Alice Sciortino Gianpiero Buscarino Maria Laura Soriano Ángel Ríos Marco Cannas Franco Gelardi Fabrizio Messina Simonpietro Agnello |
| author_sort | Federico Bruno |
| collection | DOAJ |
| description | We report a study of carbon dots produced via bottom-up and top-down routes, carried out through a multi-technique approach based on steady-state fluorescence and absorption, time-resolved fluorescence spectroscopy, Raman spectroscopy, infrared spectroscopy, and atomic force microscopy. Our study focuses on a side-to-side comparison of the fundamental structural and optical properties of the two families of fluorescent nanoparticles, and on their interaction pathways with mercury ions, which we use as a probe of surface emissive chromophores. Comparison between the two families of carbon dots, and between carbon dots subjected to different functionalization procedures, readily identifies a few key structural and optical properties apparently common to all types of carbon dots, but also highlights some critical differences in the optical response and in the microscopic mechanism responsible of the fluorescence. The results also provide suggestions on the most likely interaction sites of mercury ions at the surface of carbon dots and reveal details on mercury-induced fluorescence quenching that can be practically exploited to optimize sensing applications of carbon dots. |
| first_indexed | 2024-03-10T11:31:01Z |
| format | Article |
| id | doaj.art-c7e22db731d947ff987c92f286db250e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-10T11:31:01Z |
| publishDate | 2021-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-c7e22db731d947ff987c92f286db250e2023-11-21T19:16:23ZengMDPI AGNanomaterials2079-49912021-05-01115126510.3390/nano11051265A Comparative Study of Top-Down and Bottom-Up Carbon Nanodots and Their Interaction with Mercury IonsFederico Bruno0Alice Sciortino1Gianpiero Buscarino2Maria Laura Soriano3Ángel Ríos4Marco Cannas5Franco Gelardi6Fabrizio Messina7Simonpietro Agnello8Dipartimento di Fisica e Chimica—Emilio Segrè, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, ItalyDipartimento di Fisica e Chimica—Emilio Segrè, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, ItalyDipartimento di Fisica e Chimica—Emilio Segrè, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, ItalyDepartment of Analytical Chemistry and Food Technology, Faculty of Chemical Science and Technology, University of Castilla-La Mancha, 13071 Ciudad Real, SpainDepartment of Analytical Chemistry and Food Technology, Faculty of Chemical Science and Technology, University of Castilla-La Mancha, 13071 Ciudad Real, SpainDipartimento di Fisica e Chimica—Emilio Segrè, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, ItalyDipartimento di Fisica e Chimica—Emilio Segrè, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, ItalyDipartimento di Fisica e Chimica—Emilio Segrè, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, ItalyDipartimento di Fisica e Chimica—Emilio Segrè, Università degli Studi di Palermo, Via Archirafi 36, 90123 Palermo, ItalyWe report a study of carbon dots produced via bottom-up and top-down routes, carried out through a multi-technique approach based on steady-state fluorescence and absorption, time-resolved fluorescence spectroscopy, Raman spectroscopy, infrared spectroscopy, and atomic force microscopy. Our study focuses on a side-to-side comparison of the fundamental structural and optical properties of the two families of fluorescent nanoparticles, and on their interaction pathways with mercury ions, which we use as a probe of surface emissive chromophores. Comparison between the two families of carbon dots, and between carbon dots subjected to different functionalization procedures, readily identifies a few key structural and optical properties apparently common to all types of carbon dots, but also highlights some critical differences in the optical response and in the microscopic mechanism responsible of the fluorescence. The results also provide suggestions on the most likely interaction sites of mercury ions at the surface of carbon dots and reveal details on mercury-induced fluorescence quenching that can be practically exploited to optimize sensing applications of carbon dots.https://www.mdpi.com/2079-4991/11/5/1265carbon dotsoptical nanomaterialssensing |
| spellingShingle | Federico Bruno Alice Sciortino Gianpiero Buscarino Maria Laura Soriano Ángel Ríos Marco Cannas Franco Gelardi Fabrizio Messina Simonpietro Agnello A Comparative Study of Top-Down and Bottom-Up Carbon Nanodots and Their Interaction with Mercury Ions Nanomaterials carbon dots optical nanomaterials sensing |
| title | A Comparative Study of Top-Down and Bottom-Up Carbon Nanodots and Their Interaction with Mercury Ions |
| title_full | A Comparative Study of Top-Down and Bottom-Up Carbon Nanodots and Their Interaction with Mercury Ions |
| title_fullStr | A Comparative Study of Top-Down and Bottom-Up Carbon Nanodots and Their Interaction with Mercury Ions |
| title_full_unstemmed | A Comparative Study of Top-Down and Bottom-Up Carbon Nanodots and Their Interaction with Mercury Ions |
| title_short | A Comparative Study of Top-Down and Bottom-Up Carbon Nanodots and Their Interaction with Mercury Ions |
| title_sort | comparative study of top down and bottom up carbon nanodots and their interaction with mercury ions |
| topic | carbon dots optical nanomaterials sensing |
| url | https://www.mdpi.com/2079-4991/11/5/1265 |
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