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(searched for: doi:10.1016/j.carbon.2020.11.017)
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A. Sciortino, A. Panniello, G. Minervini, N. Mauro, G. Giammona, G. Buscarino, M. Cannas, M. Striccoli, F. Messina
Published: 1 May 2022
Materials Research Bulletin, Volume 149; https://doi.org/10.1016/j.materresbull.2022.111746

Ronn Goei, Frankie Ting Feng Tan, Amanda Jiamin Ong, Daniel Mandler,
Published: 28 March 2022
The publisher has not yet granted permission to display this abstract.
Published: 19 March 2022
by MDPI
Abstract:
Since their discovery, carbon dots have attracted a great deal of interest for their perspective biological applications. Nevertheless, the quenching of carbon dots photoluminescence represents an interesting feature for quantitative analysis in very low concentration of many species. A particular approach for the production of carbon dots is the use of biochar, a carbonized biomass, as a precursor. In this work, we overview the main achievements accomplished by using biochar-derived carbon dots for detecting and quantifying inorganic and organic species. We also provide background knowledge of the main properties, production and purification routes of carbon dots.
, Nabin Kandel, , Leonardo F. Serafim, Ahmed E. ElMetwally, Sophia M. Falkenberg, Xavier E. Paredes, Christopher J. Nelson, Nathan Smith, Elisa Padovano, et al.
Published: 10 March 2022
Carbon, Volume 193, pp 1-16; https://doi.org/10.1016/j.carbon.2022.03.021

The publisher has not yet granted permission to display this abstract.
Kirubaharan Daphne Jacinth Gracia, , , Sandhanasamy Devanesan, Mukhtar Ahmed, Maruthamuthu Murali Kannan
Published: 8 March 2022
The publisher has not yet granted permission to display this abstract.
Wei Zhang, Nabin Kandel, Yiqun Zhou, Nathan Smith, Braulio C.L.B. Ferreira, Miranda Perez, Matteo L. Claure, Keenan J. Mintz, Chunyu Wang,
Journal of Colloid and Interface Science, Volume 617, pp 20-31; https://doi.org/10.1016/j.jcis.2022.02.124

The publisher has not yet granted permission to display this abstract.
Maria Semeniuk, Jimi Tjong, Zheng-Hong Lu,
Published: 25 February 2022
Energy Reports, Volume 8, pp 3213-3220; https://doi.org/10.1016/j.egyr.2022.02.124

The publisher has not yet granted permission to display this abstract.
, Lu Wang, Yan Yan, Shuang Li, Shitao Yu, Jingguo Wang, Lang Huang
ACS Sustainable Chemistry & Engineering, Volume 10, pp 3027-3036; https://doi.org/10.1021/acssuschemeng.1c08299

The publisher has not yet granted permission to display this abstract.
Xin Wang, Lei Zhao, Jinshuang Hu, Hua Wei, Xiaoyang Liu, Enshou Li,
Published: 6 January 2022
Carbon, Volume 190, pp 115-124; https://doi.org/10.1016/j.carbon.2022.01.006

The publisher has not yet granted permission to display this abstract.
Keenan J. Mintz, Emel Kirbas Cilingir, Giacomo Nagaro, Suraj Paudyal, , Durga Khadka, Sunxiang Huang, Regina M. Graham,
Bioconjugate Chemistry, Volume 33, pp 226-237; https://doi.org/10.1021/acs.bioconjchem.1c00544

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Ruoyu Dai, Xipao Chen, Ning Ouyang,
Published: 16 December 2021
Chemical Engineering Journal, Volume 431; https://doi.org/10.1016/j.cej.2021.134172

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Zehuai Mou, Zhijin Gao,
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy; https://doi.org/10.1016/j.saa.2021.120734

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Wansheng Luo, Hongying Quan, Zhixia Zhang, Yunying Wang, Xiaolin Xie, Zhen Hong,
ACS Applied Nano Materials, Volume 4, pp 12051-12061; https://doi.org/10.1021/acsanm.1c02606

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, Chunhui Yi, Jingru Sun, Yueyan Zang, Yao Wang, Ming Xu, Jinxia Xu
Published: 6 November 2021
Microchimica Acta, Volume 188, pp 1-18; https://doi.org/10.1007/s00604-021-05068-6

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Published: 4 November 2021
by MDPI
Abstract:
Carbon nanomaterials (CNMs) have been extensively used as electrochemical sensing composites due to their interesting chemical, electronic, and mechanical properties giving rise to increased performance. Due to these materials’ unknown long-term ecological fate, care must be given to make their use tractable. In this review, the design and use of carbon nanotubes (CNTs), graphene, and carbon dots (CDs) as electrochemical sensing electrocatalysts applied to the working electrode surface are surveyed for various biosensing applications. Graphene and CDs are readily biodegradable as compared to CNTs. Design elements for CNTs that carry over to graphene and CDs include Coulombic attraction of components and using O or N atoms that serve as tethering points for attaching electrocatalytically active nanoparticles (NPs) and/or other additives.
Anshu Dandia, Pratibha Saini, Mukul Sethi, Krishan Kumar, Surendra Saini, Savita Meena, Swati Meena,
Published: 26 October 2021
Abstract:
Fluorescent carbon quantum dots (CQDs), specified by feature sizes of <10 nm, have become a mystic newcomers in the world of nanoscience and attracted much focus of synthetic chemists since the last decade due to their esoteric physico-chemical features. Because of these magical characteristics, carbon dots-based catalytic systems have unlocked the gateway for eco-friendly, benign, and cost-effective next-generation platform for “Nanocatalysis and Photocatalysis” in organic synthesis. The introduction of CQDs in organic synthesis allows the designing new reactions or catalysis in which unique/unprecedented connection/disconnection of chemical bonds has been implemented for the construction of new molecular architectures. This critical review presents a comprehensive study of the catalytic and photocatalytic efficiency of CQDs in organic synthesis which has initiated a more sustainable strategy in to the catalysis field. By systematic summarization and categorization of various organic transformations such as coupling reactions, oxidation reactions, reduction reactions, condensation reactions, ring-opening reactions, epoxidation, C-H activation, etc., a clear picture of all available catalytic and photocatalytic strategies for CQDs are presented and their unique role in various catalytic approaches for specific reactions are discussed in detail. Catalytic aspects of CQDs in heterocyclic synthesis are also been reviewed. Finally, challenges and future aspects associated with the green catalytic efficiency of CQDs in organic synthesis are highlighted. Herein, this review summarizes the current investigations on CQDs for various organic transformations during last 10 years. We experience that the entire potential of CQDs in organic synthesis has yet to be fully explored in organic synthesis. We hope that this review is serving as a humble urge to encourage other organic chemists for further use of CQDs as a sustainable catalyst in organic synthesis. Graphical Abstract
, Kirill Kozhushnyi, Tatiana Dolenko
Fullerenes, Nanotubes and Carbon Nanostructures pp 1-7; https://doi.org/10.1080/1536383x.2021.1986014

Abstract:
Does the hybridization of the surface of carbon nanoparticles (CNPs) affect the properties of the surface carboxyl and hydroxyl groups and the features of their deprotonation in water? To answer these questions in this work the structures of graphite-and diamond-like carbon cells with OH and COOH groups optimized by the DFT method were studied. It was found that in the same suspensions the OH and COOH groups deprotonate easier being on carbon with sp2 hybridization rather than sp3. Theoretical estimates have shown that in aqueous suspensions of CNPs, “isolated” carboxyl COOH groups on sp2/sp3 hybridized carbon sites have pKa in the ranges of 3.5–4.5/4.5–5, and the hydroxyl OH groups – in the ranges of 8.5–10/15–18, respectively. The conclusions made on the basis of theoretical calculations about the features of deprotonation of surface groups of CNPs are experimentally confirmed by the changes of the zeta-potentials of oxidized detonation nanodiamonds with the change of the pH of the environment.
Yiqun Zhou, Ahmed E. ElMetwally, Jiuyan Chen, Wenquan Shi, Emel K. Cilingir, Brian Walters, Keenan J. Mintz, Christian Martin, Braulio C.L.B. Ferreira, Wei Zhang, et al.
Journal of Colloid and Interface Science, Volume 599, pp 519-532; https://doi.org/10.1016/j.jcis.2021.04.121

Abstract:
To protect water resources, halt waterborne diseases, and prevent future water crises, photocatalytic degradation of water pollutants arouse worldwide interest. However, considering the low degradation efficiency and risk of secondary pollution displayed by most metal-based photocatalysts, highly efficient and environmentally friendly photocatalysts with appropriate band gap, such as carbon dots (CDs), are in urgent demand. In this study, the photocatalytic activity of gel-like CDs (G-CDs) was studied using diverse water pollution models for photocatalytic degradation. The degradation rate constants demonstrated a remarkably enhanced photocatalytic activity of G-CDs compared with most known CD species and comparability to graphitic carbon nitride (g-C3N4). In addition, the rate constant was further improved by 1.4 times through the embedment of g-C3N4 in G-CDs to obtain CD-C3N4. Significantly, the rate constant was also higher than that of g-C3N4 alone, revealing a synergistic effect. Moreover, the use of diverse radical scavengers suggested that the main contributors to the photocatalytic degradation with G-CDs alone were superoxide radicals (O2-) and holes that were, however, substituted by O2- and hydroxyl radicals (OH) due to the addition of g-C3N4. Furthermore, the photocatalytic stabilities of G-CDs and CD-C3N4 turned out to be excellent after four cycles of dye degradation were performed continuously. Eventually, the nontoxicity and environmental friendliness of G-CDs and CD-C3N4 were displayed with sea urchin cytotoxicity tests. Hence, through various characterizations, photocatalytic degradation and cytotoxicity tests, G-CDs proved to be an environmentally friendly and highly efficient future photocatalyst.
, Christopher J. Clark, , Ethan T. Williams, Carissa Shuxteau, Elif S. Seven, Roger M. Leblanc
Published: 6 September 2021
The publisher has not yet granted permission to display this abstract.
Keenan J. Mintz,
Biochimica et Biophysica Acta (BBA) - Molecular Cell Research, Volume 1876; https://doi.org/10.1016/j.bbcan.2021.188621

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Xin Yang, Xue Li, Boyang Wang, , , Bai Yang,
Published: 20 August 2021
Chinese Chemical Letters, Volume 33, pp 613-625; https://doi.org/10.1016/j.cclet.2021.08.077

The publisher has not yet granted permission to display this abstract.
Maryam Davardoostmanesh, , Elaheh K. Goharshadi
Colloid and Interface Science Communications, Volume 44; https://doi.org/10.1016/j.colcom.2021.100479

The publisher has not yet granted permission to display this abstract.
, Xu Shao, Qi Shu, Yonggang Teng, Youbei Qiao, , Xiaoling Hu,
International Journal of Biological Macromolecules, Volume 186, pp 839-848; https://doi.org/10.1016/j.ijbiomac.2021.07.078

The publisher has not yet granted permission to display this abstract.
, , Fanyi Meng, Jin Xiao, Junge Liang, Hyunseok Kim, Sanghoon Bae, Danqing Zou, Eun-Seong Kim, , et al.
Published: 14 July 2021
Carbon, Volume 183, pp 578-589; https://doi.org/10.1016/j.carbon.2021.07.031

The publisher has not yet granted permission to display this abstract.
Wei Zhang, Ganesh Sigdel, Keenan J Mintz, Elif S Seven, Yiqun Zhou, Chunyu Wang,
International Journal of Nanomedicine, pp 5003-5016; https://doi.org/10.2147/ijn.s318732

Abstract:
Drug delivery across the blood-brain barrier (BBB) is one of the biggest challenges in modern medicine due to the BBB's highly semipermeable property that limits most therapeutic agents of brain diseases to enter the central nervous system (CNS). In recent years, nanoparticles, especially carbon dots (CDs), exhibit many unprecedented applications for drug delivery. Several types of CDs and CD-ligand conjugates have been reported successfully penetrating the BBB, which shows a promising progress in the application of CD-based drug delivery system (DDS) for the treatment of CNS diseases. In this review, our discussion of CDs includes their classification, preparations, structures, properties, and applications for the treatment of neurodegenerative diseases, especially Alzheimer's disease (AD) and brain tumor. Moreover, abundant functional groups on the surface, especially amine and carboxyl groups, allow CDs to conjugate with diverse drugs as versatile drug nanocarriers. In addition, structure of the BBB is briefly described, and mechanisms for transporting various molecules across the BBB and other biological barriers are elucidated. Most importantly, recent developments in drug delivery with CDs as BBB-penetrating nanodrugs and drug nanocarriers to target CNS diseases especially Alzheimer's disease and brain tumor are summarized. Eventually, future prospects of the CD-based DDS are discussed in combination with the development of artificial intelligence and nanorobots.
Published: 21 May 2021
by MDPI
Abstract:
Cancer theranostics is a new concept of medical approach that attempts to combine in a unique nanoplatform diagnosis, monitoring and therapy so as to provide eradication of a solid tumor in a non-invasive fashion. There are many available solutions to tackle cancer using theranostic agents such as photothermal therapy (PTT) and photodynamic therapy (PDT) under the guidance of imaging techniques (e.g., magnetic resonance—MRI, photoacoustic—PA or computed tomography—CT imaging). Additionally, there are several potential theranostic nanoplatforms able to combine diagnosis and therapy at once, such as gold nanoparticles (GNPs), graphene oxide (GO), superparamagnetic iron oxide nanoparticles (SPIONs) and carbon nanodots (CDs). Currently, surface functionalization of these nanoplatforms is an extremely useful protocol for effectively tuning their structures, interface features and physicochemical properties. This approach is much more reliable and amenable to fine adjustment, reaching both physicochemical and regulatory requirements as a function of the specific field of application. Here, we summarize and compare the most promising metal- and carbon-based theranostic tools reported as potential candidates in precision cancer theranostics. We focused our review on the latest developments in surface functionalization strategies for these nanosystems, or hybrid nanocomposites consisting of their combination, and discuss their main characteristics and potential applications in precision cancer medicine.
Vishal Rimal, Shubham Shishodia, , Subhadeep Gupta, Amirul Islam Mallick
Published: 9 March 2021
Applied Nanoscience, Volume 11, pp 1225-1239; https://doi.org/10.1007/s13204-021-01737-3

The publisher has not yet granted permission to display this abstract.
Published: 10 January 2021
by MDPI
Applied Sciences, Volume 11; https://doi.org/10.3390/app11020614

Abstract:
Graphene is the most outstanding material among the new nanostructured carbonaceous species discovered and produced. Graphene’s astonishing properties (i.e., electronic conductivity, mechanical robustness, large surface area) have led to a deep change in the material science field. In this review, after a brief overview of the main characteristics of graphene and related materials, we present an extensive overview of the most recent achievements in biological uses of graphene and related materials.
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