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Li W, Tang H, Zhang D, Huang T, Xing B. Identifying the Stripping of Oxide Debris from Graphene Oxide: Evidence from Experimental Analysis and Molecular Simulation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:5963-5973. [PMID: 38512311 DOI: 10.1021/acs.est.3c10044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
In this study, characteristics of oxidation debris (OD) and its stripping mechanism from graphene oxide (GO) were explored. The results demonstrated that OD contains three components, namely, protein-, fulvic acid-, and humic acid-like substances; among these, protein-like substances with lower molecular weight and higher hydrophilicity were most liable to be stripped from GO and were the primary components stripped from GO at pH < 10, whereas humic acid- and fulvic acid-like substances were stripped from GO at pH > 10. During the stripping of OD, hydrogen bonds from carboxyl and carbonyl were the first to break, followed by hydrogen bonds from epoxy. Subsequently, π-π interactions were broken, and hydrogen bond interactions induced by hydroxyl groups were the hardest to break. After the stripping of OD, the recombination of OD on GO was observed, and regions containing relatively fewer oxygen-containing functional groups were favorable binding sites for the readsorbed OD. The stripping and recombination of OD on GO resulted in an uneven GO surface, which should be considered during the development of GO-based environmental materials and the evaluation of their environmental behavior.
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Affiliation(s)
- Wenli Li
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
- Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Huan Tang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
- Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Dan Zhang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
- Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Tinglin Huang
- Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
- Collaborative Innovation Center of Water Pollution Control and Water Quality Security Assurance of Shaanxi Province, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, Massachusetts 01003, United States
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Electro-conductive carbon nanofibers containing ferrous sulfate for bone tissue engineering. Life Sci 2021; 282:119602. [PMID: 34217765 DOI: 10.1016/j.lfs.2021.119602] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 04/17/2021] [Accepted: 05/03/2021] [Indexed: 11/22/2022]
Abstract
The application of electroactive scaffolds can be promising for bone tissue engineering applications. In the current paper, we aimed to fabricate an electro-conductive scaffold based on carbon nanofibers (CNFs) containing ferrous sulfate. FeSO4·7H2O salt with different concentrations 5, 10, and 15 wt%, were blended with polyacrylonitrile (PAN) polymer as the precursor and converted to Fe2O3/CNFs nanocomposite by electrospinning and heat treatment. The characterization was conducted using SEM, EDX, XRD, FTIR, and Raman methods. The results showed that the incorporation of Fe salt induces no adverse effect on the nanofibers' morphology. EDX analysis confirmed that the Fe ions are uniformly dispersed throughout the CNF mat. FTIR spectroscopy showed the interaction of Fe salt with PAN polymer. Raman spectroscopy showed that the incorporation of FeSO4·7H2O reduced the ID/IG ratio, indicating more ordered carbon in the synthesized nanocomposite. Electrical resistance measurement depicted that, although the incorporation of ferrous sulfate reduced the electrical conductivity, the conductive is suitable for electrical stimulation. The in vitro studies revealed that the prepared nanocomposites were cytocompatible and only negligible toxicity (less than 10%) induced by CNFs/Fe2O3 fabricated from PAN FeSO4·7H2O 15%. Although various nanofibrous composite fabricated with Fe NPs have been evaluated for tissue engineering applications, CNFs exhibited promising properties, such as excellent mechanical strength, biocompatibility, and electrical conductivity. These results showed that the fabricated nanocomposites could be applied as the bone tissue engineering scaffold.
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Zhang J, Xiong C, Li Y, Tang H, Meng X, Zhu W. The critical contribution of oxidation debris on the acidic properties of graphene oxide in an aqueous solution. JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123552. [PMID: 33254741 DOI: 10.1016/j.jhazmat.2020.123552] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/02/2020] [Accepted: 07/22/2020] [Indexed: 06/12/2023]
Abstract
The contribution of oxidation debris (OD) to the acidity of graphene oxide (GO) was investigated in this study. With Na2CO3 as the titrator base, the Boehm titration results showed that the total acidity of GO in an aqueous solution decreased from 9.72 to 2.74 mmol g-1 after a thorough removal of OD and that the total acidity of OD was 26.45 mmol g-1. Thermogravimetric analyses showed that the mass ratios of OD and residual graphene sheets (named bwGO) were ∼26 % and ∼73 % of the whole pristine GO, respectively. Based on the quantitative relationships between the mass ratio and acid site density, it was concluded that the total acidity of GO was equal to the sum of the acidity from bwGO and the OD contained in GO. Under alkaline conditions, the splitting and stripping of OD was attributed to the combined effect of the cleavage of H-bonds by nucleophilic attack from OH- and the electrostatic repulsion due to the ionization of carboxylic acids, in which the former became dominant when the pH shifted to neutral and weakly acidic. This study provides an explanation for the origin of GO acidity in aqueous solutions and highlights the role of OD in the chemistry of GO.
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Affiliation(s)
- Jianfeng Zhang
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China.
| | - Cheng Xiong
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Yao Li
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Huan Tang
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China
| | - Xiaoguang Meng
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, NJ 07030, USA
| | - Weihuang Zhu
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an, 710055, China
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The Importance of Evaluating the Lot-to-Lot Batch Consistency of Commercial Multi-Walled Carbon Nanotube Products. NANOMATERIALS 2020; 10:nano10101930. [PMID: 32992617 PMCID: PMC7601794 DOI: 10.3390/nano10101930] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 09/21/2020] [Accepted: 09/24/2020] [Indexed: 12/12/2022]
Abstract
The biological response of multi-walled carbon nanotubes (MWNTs) is related to their physicochemical properties and a thorough MWNT characterization should accompany an assessment of their biological activity, including their potential toxicity. Beyond characterizing the physicochemical properties of MWNTs from different sources or manufacturers, it is also important to characterize different production lots of the same MWNT product from the same vendor (i.e., lot-to-lot batch consistency). Herein, we present a comprehensive physicochemical characterization of two lots of commercial pristine MWNTs (pMWNTs) and carboxylated MWNTs (cMWNTs) used to study the response of mammalian macrophages to MWNTs. There were many similarities between the physicochemical properties of the two lots of cMWNTs and neither significantly diminished the 24-h proliferation of RAW 264.7 macrophages up to the highest concentration tested (200 μg cMWNTs/mL). Conversely, several physicochemical properties of the two lots of pMWNTs were different; notably, the newer lot of pMWNTs displayed less oxidative stability, a higher defect density, and a smaller amount of surface oxygen species relative to the original lot. Furthermore, a 72-h half maximal inhibitory concentration (IC-50) of ~90 µg pMWNTs/mL was determined for RAW 264.7 cells with the new lot of pMWNTs. These results demonstrate that subtle physicochemical differences can lead to significantly dissimilar cellular responses, and that production-lot consistency must be considered when assessing the toxicity of MWNTs.
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Oliveira TL, Bacelo KL, Forster KM, Ilha V, Rodrigues OE, Hartwig DD. DNA nanovaccines prepared using LemA antigen protect Golden Syrian hamsters against Leptospira lethal infection. Mem Inst Oswaldo Cruz 2020; 115:e190396. [PMID: 32321154 PMCID: PMC7164400 DOI: 10.1590/0074-02760190396] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 03/03/2020] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Nanoparticles (NPs) are viable candidates as carriers of exogenous materials into cells via transfection and can be used in the DNA vaccination strategy against leptospirosis. OBJECTIVES We evaluated the efficiency of halloysite clay nanotubes (HNTs) and amine-functionalised multi-walled carbon nanotubes (NH2-MWCNTs) in facilitating recombinant LemA antigen (rLemA) expression and protecting Golden Syrian hamsters (Mesocricetus auratus) against Leptospira interrogans lethal infection. METHODS An indirect immunofluorescent technique was used to investigate the potency of HNTs and NH2-MWCNTs in enhancing the transfection and expression efficiency of the DNA vaccine in Chinese hamster ovary (CHO) cells. Hamsters were immunised with two doses of vaccines HNT-pTARGET/lemA, NH2-MWCNTs-pTARGET/lemA, pTARGET/lemA, and empty pTARGET (control), and the efficacy was determined in terms of humoral immune response and protection against a lethal challenge. FINDINGS rLemA DNA vaccines carried by NPs were able to transfect CHO cells effectively, inducing IgG immune response in hamsters (p < 0.05), and did not exhibit cytotoxic effects. Furthermore, 83.3% of the hamsters immunised with NH2-MWCNTs-pTARGET/lemA were protected against the lethal challenge (p < 0.01), and 66.7% of hamsters immunised with HNT-pTARGET/lemA survived (p < 0.05). MAIN CONCLUSIONS NH2-MWCNTs and HNTs can act as antigen carriers for mammalian cells and are suitable for DNA nanovaccine delivery.
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Affiliation(s)
- Thaís Larré Oliveira
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Pelotas, RS, Brasil
| | - Kátia Leston Bacelo
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Pelotas, RS, Brasil
| | - Karine Maciel Forster
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Pelotas, RS, Brasil
| | - Vinicius Ilha
- Universidade Federal de Santa Maria, Departamento de Química, Santa Maria, RS, Brasil
| | | | - Daiane D Hartwig
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Pelotas, RS, Brasil.,Universidade Federal de Pelotas, Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Pelotas, RS, Brasil
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Zhang J, Xie X, Meng X, Li Y, Zhu W. Release and transport of Pb(II) adsorbed on graphene oxide under alkaline conditions in a saturated sand column. JOURNAL OF HAZARDOUS MATERIALS 2019; 377:357-364. [PMID: 31173986 DOI: 10.1016/j.jhazmat.2019.05.087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/26/2019] [Accepted: 05/26/2019] [Indexed: 06/09/2023]
Abstract
The use of graphene oxide (GO) adsorbents to remove Pb(II) from wastewater has attracted lots of attention, but the release of Pb(II) from Pb-laden GO in alkaline groundwater requires further investigation. The current research demonstrated that oxidative debris (OD) could be stripped gradually from the surfaces of GO in 0.01-1.0 M NaHCO3 solutions although the stripping kinetic process was very slow. Accompanied with OD detachment from GO, 5.47%-23.45% adsorbed Pb(II) on spent GO (i.e. GO-Pb(II)) was released in the form of an OD-Pb(II) complex under 0.01-1.0 M NaHCO3 conditions. OD-Pb(II) could disperse steadily in water even at pH > 7.0. The deposition and detachment of the OD in the quartz sand media were markedly affected by the ion strength of the solution, and the greater mobility of OD than GO improved the transport of OD-Pb(II) through a saturated sand column. Our results provide valuable information about the characteristics and mechanism of transport of adsorbed heavy metals on GO nanomaterials in the aqueous environment and the possible environmental risks when spent GO-based heavy mental adsorbents are discharged into natural groundwater systems.
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Affiliation(s)
- Jianfeng Zhang
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China.
| | - Xiaodan Xie
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
| | - Xiaoguang Meng
- Center for Environmental Systems, Stevens Institute of Technology, Hoboken, NJ, 07030, USA
| | - Yao Li
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
| | - Weihuang Zhu
- Shaanxi Key Laboratory of Environmental Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, People's Republic of China
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Hamilton RF, Wu Z, Thakkar M, Holian A, Mitra S. Modification of nano-silver bioactivity by adsorption on carbon nanotubes and graphene oxide. Inhal Toxicol 2019; 30:429-438. [PMID: 30618316 DOI: 10.1080/08958378.2018.1547334] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
OBJECTIVE The toxicity of silver nanomaterials in various forms has been extensively evaluated, but the toxicity of silver nanocarbon composites is less well understood. Therefore, silver-carbon nanotube composites (Ag-MWCNT-COOH) and silver-graphene oxide composites (Ag-GO) were synthesized by microwave irradiation and evaluated in two in vitro cell models. MATERIALS/METHODS Toxicity of silver nanosphere (Ag), Ag-MWCNT-COOH and Ag-GO were analyzed by MTS assay and LDH assay in primary C57BL/6 murine alveolar macrophages and human THP-1 cells. Activation of NLRP3 inflammasome by particle variants in these models was done by proxy using LPS co-culture and IL-1β release. RESULTS The results depended on the model, as the amount of Ag on the modified carbon resulted in slightly increased toxicity for the murine cells, but did not appear to affect toxicity in the human cell model. IL-1β release from carbon particle-exposures was decreased by the presence of Ag in both cell models. Suspensions of Ag-MWCNT-COOH, Ag-GO and Ag in artificial lysosomal fluid were prepared and ICP-MS was used to detect Ag ions concentration in three silver suspension/solutions. The amount of Ag ions released from Ag-MWCNT-COOH and Ag-GO were similar, which were both lower than that of Ag nanospheres. CONCLUSIONS The results suggest the bioactivity of silver composites may be related to the amount of Ag ions released, which can be dependent on the cell model under investigation.
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Affiliation(s)
- Raymond F Hamilton
- a Center for Environmental Health Sciences, University of Montana , Missoula , MT , USA
| | - Zheqiong Wu
- b Department of Chemistry and Environmental Science , New Jersey Institute of Technology , Newark , NJ , USA
| | - Megha Thakkar
- b Department of Chemistry and Environmental Science , New Jersey Institute of Technology , Newark , NJ , USA
| | - Andrij Holian
- a Center for Environmental Health Sciences, University of Montana , Missoula , MT , USA
| | - Somenath Mitra
- b Department of Chemistry and Environmental Science , New Jersey Institute of Technology , Newark , NJ , USA
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Intrchom W, Thakkar M, Hamilton RF, Holian A, Mitra S. Effect of Carbon Nanotube-Metal Hybrid Particle Exposure to Freshwater Algae Chlamydomonas reinhardtii. Sci Rep 2018; 8:15301. [PMID: 30333573 PMCID: PMC6193050 DOI: 10.1038/s41598-018-33674-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 10/01/2018] [Indexed: 02/08/2023] Open
Abstract
We demonstrate for the first time the toxicity of carbon nanotube (CNT) metal hybrids on freshwater algae. Carbon nanotube-silver (CNT-Ag) and platinum hybrids (CNT-Pt) were synthesized and exposed to Chlamydomonas reinhardtii (C. reinhardtii), and their toxicity was compared to the pure metal salts. Interactions between CNT-metal and algae were studied using electron microscopy and it was observed that while outer membrane of the algal cell was damaged as a result of Ag+ toxicity from pure Ag, the CNT-Ag only caused the distortion of the cell wall. It was also observed that the CNT-Ag particles could be internalized and enclosed in internal vesicles in the algal cells. Long-term exposure of the CNT-metals showed delay in algal growth. CNT-Ag at a concentration of 5.0 mg/L showed 90% growth inhibition and also showed a significant effect on photosynthetic yield with a 21% drop compared to the control. It was observed that pure silver was more toxic compared with CNT-Ag for both growth and photosynthesis in the 96-hour exposure. In general, CNT-Pt showed significantly less toxic effects on the algae than CNT-Ag. Based on this study, it is postulated that the CNT suppressed the release of Ag+ from CNT-Ag hybrids, thus reducing overall toxicity.
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Affiliation(s)
- Worawit Intrchom
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Megha Thakkar
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Raymond F Hamilton
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, 59812, USA
| | - Andrij Holian
- Department of Biomedical and Pharmaceutical Sciences, Center for Environmental Health Sciences, University of Montana, Missoula, MT, 59812, USA
| | - Somenath Mitra
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA.
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Said S. Synthesis and functionalization of ordered mesoporous carbons supported Pt nanoparticles for hydroconversion of n-heptane. NEW J CHEM 2018. [DOI: 10.1039/c8nj02786b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reaction pathway of n-heptane hydroconversion.
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Affiliation(s)
- S. Said
- Refining Department
- Catalysis Division
- Egyptian Petroleum Research Institute
- Nasr City
- Egypt
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Oliveira TL, Bacelo KL, Schuch RA, Seixas FK, Collares T, Rodrigues OE, Vargas J, Nascimento ROD, Dellagostin OA, Hartwig DD. Immune response in hamsters immunised with a recombinant fragment of LigA from Leptospira interrogans, associated with carrier molecules. Mem Inst Oswaldo Cruz 2016; 111:712-716. [PMID: 27759768 PMCID: PMC5125051 DOI: 10.1590/0074-02760160214] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 07/29/2016] [Indexed: 12/11/2022] Open
Abstract
Immunisation with the C-terminal region of leptospiral immunoglobulin-like A protein
(LigANI) has shown promising results against leptospirosis. We evaluated the humoral
immune response and protection induced by LigANI associated with carboxyl
multi-walled carbon nanotubes (COOH-MWCNTs), CpG oligodeoxynucleotides (CpG ODNs), or
Alhydrogel. Animals immunised with CpG ODNs were unable to develop a humoral immune
response, whereas immunisation with LigANI and COOH-MWCNTs produced a high level of
IgG antibodies, similar to that with LigANI and Alhydrogel, but it was not
protective. The use of carbon nanotubes as an adjuvant in subunit vaccines against
leptospirosis is a novel approach for improving specific IgG production.
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Affiliation(s)
- Thaís L Oliveira
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Pelotas, RS, Brasil
| | - Kátia L Bacelo
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Pelotas, RS, Brasil
| | - Rodrigo A Schuch
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Pelotas, RS, Brasil
| | - Fabiana K Seixas
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Pelotas, RS, Brasil
| | - Tiago Collares
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Pelotas, RS, Brasil
| | - Oscar Ed Rodrigues
- Universidade Federal de Santa Maria, Departamento de Química, Santa Maria, RS, Brasil
| | - Josimar Vargas
- Universidade Federal de Santa Maria, Departamento de Química, Santa Maria, RS, Brasil
| | | | - Odir A Dellagostin
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Pelotas, RS, Brasil
| | - Daiane D Hartwig
- Universidade Federal de Pelotas, Centro de Desenvolvimento Tecnológico, Programa de Pós-Graduação em Biotecnologia, Núcleo de Biotecnologia, Pelotas, RS, Brasil.,Universidade Federal de Pelotas, Instituto de Biologia, Departamento de Microbiologia e Parasitologia, Pelotas, RS, Brasil
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Braun EI, Draper R, Pantano P. Enriched surface acidity for surfactant-free suspensions of carboxylated carbon nanotubes purified by centrifugation. ACTA ACUST UNITED AC 2016; 8:26-33. [PMID: 27695672 DOI: 10.1016/j.ancr.2016.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
It is well known that surfactant-suspended carbon nanotube (CNT) samples can be purified by centrifugation to decrease agglomerates and increase individually-dispersed CNTs. However, centrifugation is not always part of protocols to prepare CNT samples used in biomedical applications. Herein, using carboxylated multi-walled CNTs (cMWCNTs) suspended in water without a surfactant, we developed a Boehm titrimetric method for the analysis of centrifuged cMWCNT suspensions and used it to show that the surface acidity of oxidized carbon materials in aqueous cMWCNT suspensions was enriched by ~40% by a single low-speed centrifugation step. This significant difference in surface acidity between un-centrifuged and centrifuged cMWCNT suspensions has not been previously appreciated and is important because the degree of surface acidity is known to affect the interactions of cMWCNTs with biological systems.
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Affiliation(s)
- Elizabeth I Braun
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080-3021, USA
| | - Rockford Draper
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080-3021, USA; Department of Biological Sciences, The University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080-3021, USA; Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080-3021, USA
| | - Paul Pantano
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080-3021, USA; Alan G. MacDiarmid NanoTech Institute, The University of Texas at Dallas, 800 West Campbell Road, Richardson, TX 75080-3021, USA
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Gusmão R, Cunha E, Paiva C, Geraldo D, Proença F, Bento F. Role of Carbonaceous Fragments on the Functionalization and Electrochemistry of Carbon Materials. ChemElectroChem 2016. [DOI: 10.1002/celc.201600399] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rui Gusmão
- Instituto de Polímeros e Compósitos/I3N; Universidade do Minho; Campus de Azurem 4800-058 Guimarães Portugal
- Centro de Química; Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - Eunice Cunha
- Instituto de Polímeros e Compósitos/I3N; Universidade do Minho; Campus de Azurem 4800-058 Guimarães Portugal
| | - Conceição Paiva
- Instituto de Polímeros e Compósitos/I3N; Universidade do Minho; Campus de Azurem 4800-058 Guimarães Portugal
| | - Dulce Geraldo
- Centro de Química; Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - Fernanda Proença
- Centro de Química; Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - Fátima Bento
- Centro de Química; Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
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13
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Leal CV, Martinez DST, Más BA, Alves OL, Duek EAR. Influence of purified multiwalled carbon nanotubes on the mechanical and morphological behavior in poly (L-lactic acid) matrix. J Mech Behav Biomed Mater 2016; 59:547-560. [PMID: 27038896 DOI: 10.1016/j.jmbbm.2016.03.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/13/2016] [Accepted: 03/17/2016] [Indexed: 11/26/2022]
Abstract
Poly (L-latic acid) (PLLA) is a bioresorbable polymer widely used as a biomaterial, but its fragility can limit its use. An alternative is to produce polymer nanocomposites, which can enhance the mechanical properties of polymeric matrix, resulting in a material with differentiated properties. In this work, PLLA based nanocomposites containing 0.25, 0.5 and 1.0wt% of purified multiwalled carbon nanotubes (p-MWCNTs) were prepared by the solvent casting method. The morphology and mechanical properties results show an improvement in strain at break for 0.25 and 0.5wt% p-MWCNTs and an increase in stiffness and elastic modulus for all compositions. Nanocomposites presented a p-MWCNTs agglomeration; however, there was a good stress transfer between PLLA and p-MWCNTs, which was confirmed by the increase in the hardness and elastic modulus. Atomic force microscopy analysis indicated an increase in roughness after nanotube addition. The in vitro biological study showed that PLLA/p-MWCNTs nanocomposites are cytocompatible with osteoblasts cells. The capacity of PLLA nanocomposites to stimulate osteogenesis was investigated by alkaline phosphatase (ALP) activity assay. Higher ALP activity was found on osteoblasts cultured on nanocomposites with 0.25 and 0.5wt% p-MWCNT compared to neat PLLA, confirming that PLLA cytocompatibility was improved on these compositions. Finally, our results showed that by a simple and inexpensive solvent casting method, it is possible to manufacture biofunctional nanocomposites devices with potential for orthopedic applications.
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Affiliation(s)
- C V Leal
- Department of Materials Engineering, Faculty of Mechanical Engineering, University of Campinas, 13083-860 Campinas, SP, Brazil.
| | - D S T Martinez
- Solid State Chemistry Laboratory, Institute of Chemistry, University of Campinas, P.O. Box 6154, 13081-970 Campinas, SP, Brazil; Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), 1308-970 Campinas, SP, Brazil
| | - B A Más
- Faculty of Medical Sciences, Pontifical Catholic University of São Paulo - PUC-SP, 18030-095 Sorocaba, SP, Brazil
| | - O L Alves
- Solid State Chemistry Laboratory, Institute of Chemistry, University of Campinas, P.O. Box 6154, 13081-970 Campinas, SP, Brazil
| | - E A R Duek
- Department of Materials Engineering, Faculty of Mechanical Engineering, University of Campinas, 13083-860 Campinas, SP, Brazil; Faculty of Medical Sciences, Pontifical Catholic University of São Paulo - PUC-SP, 18030-095 Sorocaba, SP, Brazil
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14
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Puskas R, Sápi A, Kukovecz Á, Kónya Z. Understanding the role of post-CCVD synthetic impurities, functional groups and functionalization-based oxidation debris on the behaviour of carbon nanotubes as a catalyst support in cyclohexene hydrogenation over Pd nanoparticles. RSC Adv 2016. [DOI: 10.1039/c6ra16918j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Tuning of the surface modification has a striking effect on the physical and chemical properties of CNTs in surface chemical processes.
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Affiliation(s)
- R. Puskas
- Department of Applied and Environmental Chemistry
- University of Szeged
- Szeged
- Hungary
| | - A. Sápi
- Department of Applied and Environmental Chemistry
- University of Szeged
- Szeged
- Hungary
| | - Á. Kukovecz
- Department of Applied and Environmental Chemistry
- University of Szeged
- Szeged
- Hungary
- MTA-SzTE “Lendület” Porous Nanocomposites Research Group
| | - Z. Kónya
- Department of Applied and Environmental Chemistry
- University of Szeged
- Szeged
- Hungary
- MTA-SzTE Reaction Kinetics and Surface Chemistry Research Group
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15
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Bai W, Wu Z, Mitra S, Brown JM. Effects of multiwalled carbon nanotube surface modification and purification on bovine serum albumin binding and biological responses. JOURNAL OF NANOMATERIALS 2016; 2016:2159537. [PMID: 29033982 PMCID: PMC5640435 DOI: 10.1155/2016/2159537] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The potential diagnostic and therapeutic applications such as drug delivery of multi-walled carbon nanotubes (MWCNTs) are being increasingly explored due to their unique mechanical, chemical and biological properties. Carboxylation of MWCNTs has been widely used to improve the solubility in aqueous systems, and for further functionalization with biologically active moieties. Purity of carboxylated MWCNTs is of great importance in nanomedicine. An important consideration is that oxidation debris is generated during the process of carboxylation, which can be removed by base washing. We hypothesized that surface modification as well as further purification by debris removal may alter physicochemical properties of MWCNTs and their ability to bind proteins. In this study, we utilized pristine MWCNT carboxylated MWCNTs (F-MWCNTs) and base-washed carboxylated MWCNTs (BW-F-MWCNTs) to examine formation of a bovine serum albumin (BSA) protein corona and impact on biological responses. We found that carboxylation increased the capability of F-MWCNTs to bind BSA, and base washing further increased this binding by 41% implying that purification of F-MWCNTs is an important consideration in biological applications. The BSA protein corona decreased the hydrodynamic size of MWCNTs by nearly 50% because the coating improved colloidal behavior. The effect was significantly less pronounced for F-MWCNTs and BW-F-MWCNTs because they were highly dispersible to begin with. Functionalization increased cellular uptake by both rat aortic endothelial cells (RAEC) and macrophage-like murine cells (RAW264.7), while base washing showed results similar to the functionalized analog. Interestingly, BSA binding downregulated mRNA levels of interleukin-6 (IL-6) and heme oxygenase 1 (Hmox1) in RAEC cells but upregulated the expression of IL-6 and Hmox1 in RAW264.7 cells, indicating the dependence of cell types in biological responses to MWCNTs. Overall, our study demonstrated that surface modification as well as further purification impacted the interaction of MWCNTs with proteins and subsequent cellular responses. Interestingly, while the corona associated with the F-MWCNTs and BW-F-MWCNTs were significantly different, their respective cellular uptake and biological responses were similar. This implied that surface functionalization played a more important role than surface corona.
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Affiliation(s)
- Wei Bai
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado-Anschutz Medical Campus, Aurora, CO 80045
| | - Zheqiong Wu
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102
| | - Somenath Mitra
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102
| | - Jared M. Brown
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado-Anschutz Medical Campus, Aurora, CO 80045
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16
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Ma D, Dong L, Zhou M, Zhu L. The influence of oxidation debris containing in graphene oxide on the adsorption and electrochemical properties of 1,10-phenanthroline-5,6-dione. Analyst 2016; 141:2761-6. [DOI: 10.1039/c5an02506k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The presence of oxidation debris greatly impact on the adsorption and electrochemical response of 1,10-phenanthroline-5,6-dione on graphene oxide.
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Affiliation(s)
- Danyang Ma
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province
- School of Chemistry
- Northeast Normal University
- Changchun
- 130024 China
| | - Lini Dong
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province
- School of Chemistry
- Northeast Normal University
- Changchun
- 130024 China
| | - Ming Zhou
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province
- School of Chemistry
- Northeast Normal University
- Changchun
- 130024 China
| | - Liande Zhu
- Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province
- School of Chemistry
- Northeast Normal University
- Changchun
- 130024 China
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17
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Li X, Ma D, Zhu L. Electrocatalytic Activities of Chemically Reduced Graphene Are Essentially Dominated by the Adhered Carbonaceous Debris. Chemistry 2015; 21:17239-44. [DOI: 10.1002/chem.201502570] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Indexed: 11/10/2022]
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18
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Carbon nanoparticles pillared multi-walled carbon nanotubes for adsorption of 1-naphthol: Thermodynamics, kinetics and isotherms. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.01.069] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Hartwig DD, Bacelo KL, Oliveira TL, Schuch R, Seixas FK, Collares T, Rodrigues O, Hartleben CP, Dellagostin OA. The use of halloysite clay and carboxyl-functionalised multi-walled carbon nanotubes for recombinant LipL32 antigen delivery enhanced the IgG response. Mem Inst Oswaldo Cruz 2015; 110:134-7. [PMID: 25742273 PMCID: PMC4371227 DOI: 10.1590/0074-02760140276] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 12/08/2014] [Indexed: 11/22/2022] Open
Abstract
We studied the feasibility of using halloysite clay nanotubes (HNTs) and
carboxyl-functionalised multi-walled carbon nanotubes (COOH-MWCNTs) as antigen
carriers to improve immune responses against a recombinant LipL32 protein (rLipL32).
Immunisation using the HNTs or COOH-MWCNTs significantly increased the
rLipL32-specific IgG antibody titres (p < 0.05) of Golden Syrian hamsters. None of
the vaccines tested conferred protection against a challenge using a virulent
Leptospira interrogans strain. These results demonstrated that nanotubes can be used
as antigen carriers for delivery in hosts and the induction of a humoral immune
response against purified leptospiral antigens used in subunit vaccine
preparations.
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Affiliation(s)
| | | | | | | | | | | | - Oscar Rodrigues
- Departamento de Química, Universidade Federal de Santa Maria, Santa Maria, RS, Brasil
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20
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Janus P, Janus R, Kuśtrowski P, Jarczewski S, Wach A, Silvestre-Albero AM, Rodríguez-Reinoso F. Chemically activated poly(furfuryl alcohol)-derived CMK-3 carbon catalysts for the oxidative dehydrogenation of ethylbenzene. Catal Today 2014. [DOI: 10.1016/j.cattod.2014.03.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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21
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Filho JDS, Matsubara EY, Franchi LP, Martins IP, Rivera LMR, Rosolen JM, Grisolia CK. Evaluation of carbon nanotubes network toxicity in zebrafish (Danio rerio) model. ENVIRONMENTAL RESEARCH 2014; 134:9-16. [PMID: 25042031 DOI: 10.1016/j.envres.2014.06.017] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 06/13/2014] [Accepted: 06/19/2014] [Indexed: 05/02/2023]
Abstract
This is a detailed in vivo study of the biological response to carbon nanotubes network as probed by the zebrafish model. First, we prepared pristine carbon nanotubes (CNTs) by methanol chemical vapor deposition in the presence of Mn and Co as catalysts, followed by purification in acid, which furnished curved tubes with diameters lying between 10 and 130 nm. The CNT network consisted of pristine CNTs dispersed in water in the presence of a surfactant. The CNT network pellets corresponded to agglomerated multi-walled CNTs with an average diameter of about 500 nm. Although the same pristine CNTs had been previously found to exert genotoxic effects in vitro, here we verified that the CNT network was not genotoxic in vivo. Indeed, Raman spectroscopy and microscopy conducted in the intestine of the zebrafish revealed complete clearance of the CNT network as well as minimal disturbances, such as aneurysms, hyperemia, and reversible inflammatory focus in the zebrafish gills.
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Affiliation(s)
- Jose de Souza Filho
- Departamento de Genética e Morfologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasilia, Brazil
| | - Elaine Y Matsubara
- Departamento de Química-FFCLRP, Universidade de São Paulo, 14040-901, Ribeirão Preto-SP, Brasil.
| | - Leonardo Pereira Franchi
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto; Universidade de São Paulo, 14049-900, Ribeirão Preto - SP - Brazil
| | - Igor Pinheiro Martins
- Departamento de Genética e Morfologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasilia, Brazil
| | - Luis Miguel Ramires Rivera
- Departamento de Genética e Morfologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasilia, Brazil
| | - José Mauricio Rosolen
- Departamento de Química-FFCLRP, Universidade de São Paulo, 14040-901, Ribeirão Preto-SP, Brasil.
| | - Cesar Koppe Grisolia
- Departamento de Genética e Morfologia, Instituto de Ciências Biológicas, Universidade de Brasília, Brasilia, Brazil
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22
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Bonanni A, Ambrosi A, Chua CK, Pumera M. Oxidation debris in graphene oxide is responsible for its inherent electroactivity. ACS NANO 2014; 8:4197-204. [PMID: 24783949 DOI: 10.1021/nn404255q] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Graphene oxide is known to exhibit many interesting properties, ranging from inherent fluorescence to inherent electrochemistry, just to name a few. Recent research has found that graphene oxide is a composite material consisting of the so-called "oxidation debris" and unoxidized graphene fragments. Surprisingly, the oxidation debris, which contains small and highly oxidized aromatic fragments adsorbed on graphene surfaces, is responsible for the excellent solubility and inherent fluorescence of graphene oxide. Here, we examine the origin of the inherent electroactivity of graphene oxide and demonstrate that such phenomenon is attributed to the presence of oxidation debris. We separate oxidation debris from the less oxidized graphene backbone in "as-prepared" graphene oxide nanoplatelets using ultrasonication. We found that the extension of ultrasonication time corresponded to a larger amount of oxidation debris released from the graphene oxide nanoplatelets' surfaces and subsequently caused detrimental effects to the inherent electroactivity of the graphene material. Since graphene oxide is often the material of choice for energy storage devices, such as batteries and supercapacitors, a thorough understanding on the origin of such inherent electrochemical properties of graphene oxide is of very high importance.
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Affiliation(s)
- Alessandra Bonanni
- Division of Chemistry & Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371
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23
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Chen S, Hu S, Smith EF, Ruenraroengsak P, Thorley AJ, Menzel R, Goode AE, Ryan MP, Tetley TD, Porter AE, Shaffer MSP. Aqueous cationic, anionic and non-ionic multi-walled carbon nanotubes, functionalised with minimal framework damage, for biomedical application. Biomaterials 2014; 35:4729-38. [PMID: 24631251 DOI: 10.1016/j.biomaterials.2014.02.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 02/04/2014] [Indexed: 12/15/2022]
Abstract
The use of a thermochemical grafting approach provides a versatile means to functionalise as-synthesised, bulk multi-walled carbon nanotubes (MWNTs) without altering their inherent structure. The associated retention of properties is desirable for a wide range of commercial applications, including for drug delivery and medical purposes; it is also pertinent to studies of intrinsic toxicology. A systematic series of water-compatible MWNTs, with diameter around 12 nm have been prepared, to provide structurally-equivalent samples predominantly stabilised by anionic, cationic, or non-ionic groups. The surface charge of MWNTs was controlled by varying the grafting reagents and subsequent post-functionalisation modifications. The degree of grafting was established by thermal analysis (TGA). High resolution transmission electron microscope (HRTEM) and Raman measurements confirmed that the structural framework of the MWNTs was unaffected by the thermochemical treatment, in contrast to a conventional acid-oxidised control which was severely damaged. The effectiveness of the surface modification was demonstrated by significantly improved solubility and stability in both water and cell culture medium, and further quantified by zeta-potential analysis. The grafted MWNTs exhibited relatively low bioreactivity on transformed human alveolar epithelial type 1-like cells (TT1) following 24 h exposure as demonstrated by 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) and lactate dehydrogenase release (LDH) assays. The exposure of TT1 cells to MWNTs suppressed the release of the inflammatory mediators, interleukin 6 (IL-6) and interleukin 8 (IL-8). TEM cell uptake studies indicated efficient cellular entry of MWNTs into TT1 cells, via a range of mechanisms. Cationic MWNTs showed a more substantial interaction with TT1 cell membranes than anionic MWNTs, demonstrating a surface charge effect on cell uptake.
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Affiliation(s)
- Shu Chen
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Sheng Hu
- Department of Chemistry and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Elizabeth F Smith
- National Heart and Lung Institute, Imperial College London, Dovehouse Street, London SW3 6LY, UK
| | - Pakatip Ruenraroengsak
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Andrew J Thorley
- National Heart and Lung Institute, Imperial College London, Dovehouse Street, London SW3 6LY, UK
| | - Robert Menzel
- Department of Chemistry and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Angela E Goode
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Mary P Ryan
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Teresa D Tetley
- National Heart and Lung Institute, Imperial College London, Dovehouse Street, London SW3 6LY, UK
| | - Alexandra E Porter
- Department of Materials and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Milo S P Shaffer
- Department of Chemistry and London Centre for Nanotechnology, Imperial College London, Exhibition Road, London SW7 2AZ, UK.
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24
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Ma X, Jia L, Zhang L, Zhu L. The Significant Role of Carboxylated Carbonaceous Fragments in the Electrochemistry of Carbon Nanotubes. Chemistry 2014; 20:4072-6. [PMID: 24616146 DOI: 10.1002/chem.201304311] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Indexed: 11/05/2022]
Affiliation(s)
- Xiao Ma
- School of Chemistry, Northeast Normal University, Changchun, 130024 (P. R. China), Fax: (+86) 431-85099762
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25
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Seabra AB, Paula AJ, de Lima R, Alves OL, Durán N. Nanotoxicity of Graphene and Graphene Oxide. Chem Res Toxicol 2014; 27:159-68. [DOI: 10.1021/tx400385x] [Citation(s) in RCA: 592] [Impact Index Per Article: 59.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Amedea B. Seabra
- Exact and Earth Sciences Department, Universidade Federal de São Paulo, Diadema, São Paulo, Brazil
| | - Amauri J. Paula
- Biological Chemistry Laboratory, Institute of Chemistry, Universidade Estadual de Campinas, 13083-970 Campinas, São Paulo, Brazil
- Department of Physics, Universidade Federal do Ceará, 60455-900 Fortaleza, Ceará, Brazil
| | - Renata de Lima
- Department
of Biotechnology, Universidade de Sorocaba, Sorocaba, São Paulo, Brazil
- Universidade Federal de São Carlos, UFSCar, Sorocaba, São Paulo, Brazil
| | - Oswaldo L. Alves
- Laboratory of
Solid State Chemistry, Institute of Chemistry, Universidade Estadual de Campinas, 13083-970 Campinas, São
Paulo, Brazil
| | - Nelson Durán
- Biological Chemistry Laboratory, Institute of Chemistry, Universidade Estadual de Campinas, 13083-970 Campinas, São Paulo, Brazil
- Center of Natural and Human
Sciences, Universidade Federal do ABC, Santo André, São
Paulo, Brazil
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26
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Martinez DST, Franchi LP, Freria CM, Ferreira OP, Filho AGS, Alves OL, Takahashi CS. Carbon Nanotubes: From Synthesis to Genotoxicity. Nanotoxicology 2014. [DOI: 10.1007/978-1-4614-8993-1_6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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27
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Nanomaterials. Nanotoxicology 2014. [DOI: 10.1007/978-1-4614-8993-1_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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28
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de Faria AF, Martinez DST, Meira SMM, de Moraes ACM, Brandelli A, Filho AGS, Alves OL. Anti-adhesion and antibacterial activity of silver nanoparticles supported on graphene oxide sheets. Colloids Surf B Biointerfaces 2013; 113:115-24. [PMID: 24060936 DOI: 10.1016/j.colsurfb.2013.08.006] [Citation(s) in RCA: 218] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Revised: 07/30/2013] [Accepted: 08/03/2013] [Indexed: 12/31/2022]
Abstract
This work reports on the preparation, characterization and antibacterial activity of a nanocomposite formed from graphene oxide (GO) sheets decorated with silver nanoparticles (GO-Ag). The GO-Ag nanocomposite was prepared in the presence of AgNO3 and sodium citrate. The physicochemical characterization was performed by UV-vis spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), Raman spectroscopy and transmission electron microscopy (TEM). The average size of the silver nanoparticles anchored on the GO surface was 7.5 nm. Oxidation debris fragments (a byproduct adsorbed on the GO surface) were found to be crucial for the nucleation and growth of the silver nanoparticles. The antibacterial activity of the GO and GO-Ag nanocomposite against the microorganism Pseudomonas aeruginosa was investigated using the standard counting plate methodology. The GO dispersion showed no antibacterial activity against P. aeruginosa over the concentration range investigated. On the other hand, the GO-Ag nanocomposite displayed high biocidal activity with a minimum inhibitory concentration ranging from 2.5 to 5.0 μg/mL. The anti-biofilm activity toward P. aeruginosa adhered on stainless steel surfaces was also investigated. The results showed a 100% inhibition rate of the adhered cells after exposure to the GO-Ag nanocomposite for one hour. To the best of our knowledge, this work provides the first direct evidence that GO-Ag nanocomposites can inhibit the growth of microbial adhered cells, thus preventing the process of biofilm formation. These promising results support the idea that GO-Ag nanocomposites may be applied as antibacterial coatings material to prevent the development of biofilms in food packaging and medical devices.
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Affiliation(s)
- Andreia Fonseca de Faria
- Laboratório de Química do Estado Sólido, Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, Campinas 13083-970, São Paulo, Brazil.
| | - Diego Stéfani Teodoro Martinez
- Laboratório de Química do Estado Sólido, Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, Campinas 13083-970, São Paulo, Brazil
| | - Stela Maris Meister Meira
- Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul, Caixa Postal 15.090, Porto Alegre 91501-970, Rio Grande do Sul, Brazil
| | - Ana Carolina Mazarin de Moraes
- Laboratório de Química do Estado Sólido, Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, Campinas 13083-970, São Paulo, Brazil
| | - Adriano Brandelli
- Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul, Caixa Postal 15.090, Porto Alegre 91501-970, Rio Grande do Sul, Brazil
| | - Antonio Gomes Souza Filho
- Departamento de Física, Universidade Federal do Ceará, Caixa Postal 6030, Fortaleza 60455-900, Ceará, Brazil
| | - Oswaldo Luiz Alves
- Laboratório de Química do Estado Sólido, Instituto de Química, Universidade Estadual de Campinas, Caixa Postal 6154, Campinas 13083-970, São Paulo, Brazil.
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29
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Martinez DST, Alves OL, Barbieri E. Carbon nanotubes enhanced the lead toxicity on the freshwater fish. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/429/1/012043] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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30
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Seabra AB, Paula AJ, Durán N. Redox-enzymes, cells and micro-organisms acting on carbon nanostructures transformation: A mini-review. Biotechnol Prog 2013; 29:1-10. [DOI: 10.1002/btpr.1673] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 11/09/2012] [Indexed: 12/25/2022]
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31
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Yang X, Li X, Ma X, Jia L, Zhu L. Carbonaceous impurities greatly impact on the electrochemical capacitance of graphene. RSC Adv 2013. [DOI: 10.1039/c3ra23024d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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32
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Carbon Nanomaterials: Efficacy and Safety for Nanomedicine. MATERIALS 2012; 5:350-363. [PMID: 28817050 PMCID: PMC5448911 DOI: 10.3390/ma5020350] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 02/11/2012] [Accepted: 02/15/2012] [Indexed: 11/18/2022]
Abstract
Carbon nanomaterials, including fullerenes, carbon nanohorns, and carbon nanotubes, are increasingly being used in various fields owing to these materials’ unique, size-dependent functions and physicochemical properties. Recently, because of their high variability and stability, carbon nanomaterials have been explored as a novel tool for the delivery of therapeutic molecules including peptide and nucleic acid cancer drugs. However, insufficient information is available regarding the safety of carbon nanomaterials for human health, even though such information is vital for the development of safe and effective nanomedicine technologies. In this review, we discuss currently available information regarding the safety of carbon nanomaterials in nanomedicine applications, including information obtained from our own studies; and we discuss types of carbon nanomaterials that demonstrate particular promise for safe nanomedicine technologies.
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