Carbon dots (C-dots) are a large family of nanomaterials characterized by an intense photoluminescence. The origin of the emission is multifaceted and is dependent on a number of factors, including structure, surface, and composition. The term "carbon dots" is quite broad and encompasses a wide range of carbon nanostructures. The multiple properties are a result of this variability, which also makes it difficult to es-tablish a clear structure-property relationship. Photoluminescence is the property of this class of nano-materials that has garnered the greatest attention due to the possibility of applications in various fields, including biotechnologies, electronics, and energy. Another property of C-dots that has only lately been recognized is their antioxidant activity, i.e., the ability to act as a free radical scavenger. Furthermore, it has been proven that certain types of C-dots function as oxidizing agents when exposed to visible and/or UV radiation. This dual oxidant-antioxidant nature is particularly intriguing and closely related to the C-dot properties. Although many articles have been published on the subject, it still needs to be understood what structure-property relationships regulate the responses to free radicals. This review aims to provide a general overview of the characteristics of C-dots as scavengers or radical emitters by a critical analysis of the relevant studies. Based on their intended application as oxidants or antioxidants, the findings of this review can be used to synthesize C-dots with precisely defined functional properties.(c) 2023 Published by Elsevier Ltd.

Carbon dots as oxidant-antioxidant nanomaterials, understanding the structure-properties relationship. A critical review / Innocenzi, P; Stagi, L. - In: NANO TODAY. - ISSN 1748-0132. - 50:(2023), p. 101837. [10.1016/j.nantod.2023.101837]

Carbon dots as oxidant-antioxidant nanomaterials, understanding the structure-properties relationship. A critical review

Innocenzi, P
;
Stagi, L
2023-01-01

Abstract

Carbon dots (C-dots) are a large family of nanomaterials characterized by an intense photoluminescence. The origin of the emission is multifaceted and is dependent on a number of factors, including structure, surface, and composition. The term "carbon dots" is quite broad and encompasses a wide range of carbon nanostructures. The multiple properties are a result of this variability, which also makes it difficult to es-tablish a clear structure-property relationship. Photoluminescence is the property of this class of nano-materials that has garnered the greatest attention due to the possibility of applications in various fields, including biotechnologies, electronics, and energy. Another property of C-dots that has only lately been recognized is their antioxidant activity, i.e., the ability to act as a free radical scavenger. Furthermore, it has been proven that certain types of C-dots function as oxidizing agents when exposed to visible and/or UV radiation. This dual oxidant-antioxidant nature is particularly intriguing and closely related to the C-dot properties. Although many articles have been published on the subject, it still needs to be understood what structure-property relationships regulate the responses to free radicals. This review aims to provide a general overview of the characteristics of C-dots as scavengers or radical emitters by a critical analysis of the relevant studies. Based on their intended application as oxidants or antioxidants, the findings of this review can be used to synthesize C-dots with precisely defined functional properties.(c) 2023 Published by Elsevier Ltd.
2023
Carbon dots as oxidant-antioxidant nanomaterials, understanding the structure-properties relationship. A critical review / Innocenzi, P; Stagi, L. - In: NANO TODAY. - ISSN 1748-0132. - 50:(2023), p. 101837. [10.1016/j.nantod.2023.101837]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/318649
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