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Stabilization of lysozyme in aqueous dispersion of graphene oxide sheets. Colloids Surf B Biointerfaces 2023; 225:113250. [PMID: 36905833 DOI: 10.1016/j.colsurfb.2023.113250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 02/17/2023] [Accepted: 03/04/2023] [Indexed: 03/08/2023]
Abstract
This study examines the effect of surface oxygen groups upon ability of graphene oxide (GO) sheets in suppressing the fibrillation of lysozyme (LYZ). Graphite was oxidized using 6 and 8 wt equivalents of KMnO4, and as produced sheets were abbreviated as GO-06 and GO-08, respectively. Particulate characteristics of sheets were characterized by light scattering and electron microscopic techniques, and their interaction with LYZ was analysed by circular dichroism (CD) spectroscopy. After ascertaining acid-driven conversion of LYZ to fibrillary form, we have shown that the fibrillation of dispersed protein can be prevented by adding GO sheets. Inhibitory effect could be attributed to binding of LYZ over the sheets via noncovalent forces. A comparison between GO-06 and GO-08 samples showed superior binding affinity of the latter. Higher aqueous dispersibility and density of oxygenated groups in GO-08 sheets would have facilitated the adsorption of protein molecules, thus making them unavailable for aggregation. Pre-treatment of GO sheets with Pluronic 103 (P103, a nonionic triblock copolymer), caused reduction in the adsorption of LYZ. P103 aggregates would have rendered the sheet surface unavailable for the adsorption of LYZ. Based on these observations, we conclude that fibrillation of LYZ can be prevented in association with graphene oxide sheets.
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2
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Ekal NS, Patil R, Ranjan N, Bahadur P, Tiwari S. Oxidation state of graphene oxide nanosheets drives their interaction with proteins: A case of bovine serum albumin. Colloids Surf B Biointerfaces 2022; 212:112367. [PMID: 35114436 DOI: 10.1016/j.colsurfb.2022.112367] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 01/09/2022] [Accepted: 01/23/2022] [Indexed: 02/08/2023]
Abstract
In the present study, we explored the interaction of bovine serum albumin (BSA) with oxidized graphene oxide (GO) nanosheets. Nanosheets, synthesized with 4, 6, 8, 10 and 12 wt equivalents of KMnO4 as oxidant, were coded as GO-4, GO-6, GO-8, GO-10 and GO-12, respectively. After incubating sheets with a fixed concentration of BSA at room temperature, interactions were monitored with time. The analysis is based on UV-vis spectroscopy, fluorescence quenching, dynamic light scattering (DLS), small angle neutron scattering (SANS), Fourier transform infrared (FTIR) spectroscopy and circular dichroism (CD) techniques. Binding of BSA over sheets was recorded in the following order; GO-04 >> GO-06 > GO-08 > GO-10 ≈ GO-12. Our observations suggest that these interactions are largely regulated by the availability of pure graphitic domains and density of oxygen functionalities on sheet surface. This led us to the conclusion that GO-protein interactions can be minimized by modulating the extent of sheet oxidation. Moreover, we show that adsorption of proteins as colloidal aggregates contributes to improved biosafety of sheets. The protein molecule did not exhibit depletive changes in its conformation. However, from the viewpoint of drug delivery applications, density of oxygen groups must be optimized for maximizing the loading efficiency of oxidized sheets.
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Affiliation(s)
- Neha S Ekal
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow 226002, Uttar Pradesh, India
| | - Rahul Patil
- Shree Dhanvantary Pharmacy College, Surat 394110, Gujarat, India
| | - Nihar Ranjan
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow 226002, Uttar Pradesh, India
| | - Pratap Bahadur
- Department of Chemistry, Veer Narmad South Gujarat University, Surat 395007, Gujarat, India
| | - Sanjay Tiwari
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow 226002, Uttar Pradesh, India.
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3
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Zeng L, Zhu Z, Sun DW. Novel graphene oxide/polymer composite membranes for the food industry: structures, mechanisms and recent applications. Crit Rev Food Sci Nutr 2022; 62:3705-3722. [PMID: 35348019 DOI: 10.1080/10408398.2022.2054937] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The membrane can not only be used as food packaging, but also for the separation, fractionation and recovery of food ingredients. Graphene oxide (GO) sheets are a two-dimensional (2 D) material with a unique structure that exhibit excellent mechanical properties, biocompatibility, and flexibility. The corporation of polymer matrix membrane with GO can significantly improve the permeability, selectivity, and antibacterial activity. In this review, the chemical structures of GO, GO membranes and GO/polymer composite membranes are introduced, the permeation mechanisms of molecules through the membranes are discussed and key factors affecting the permeability are presented in detail. In addition, recent applications in the food industry for filtration, bioreactions and active food packaging are analyzed, and limitations and future trends of GO membranes development are also highlighted. GO/polymer composite membranes exhibit excellent permeability, selectivity and strong barrier properties against bacterial and gas permeation. However, current food material filtration and packaging applications of GO/polymer composite membranes are still in the laboratory stage. Future work can focus on the development of large scale uniformly sized GO production, the homogeneous distribution and tight combination of GO in polymer matrixes, the sensing function of GO in packaging, and the verification method of GO toxicology.
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Affiliation(s)
- Leyin Zeng
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China.,Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China.,Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou, China
| | - Zhiwei Zhu
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China.,Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China.,Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou, China
| | - Da-Wen Sun
- School of Food Science and Engineering, South China University of Technology, Guangzhou, China.,Academy of Contemporary Food Engineering, South China University of Technology, Guangzhou Higher Education Mega Center, Guangzhou, China.,Engineering and Technological Research Centre of Guangdong Province on Intelligent Sensing and Process Control of Cold Chain Foods, & Guangdong Province Engineering Laboratory for Intelligent Cold Chain Logistics Equipment for Agricultural Products, Guangzhou Higher Education Mega Centre, Guangzhou, China.,Food Refrigeration and Computerized Food Technology (FRCFT), Agriculture and Food Science Centre, University College Dublin, National University of Ireland, Dublin 4, Ireland
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4
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Ashrafizadeh M, Saebfar H, Gholami MH, Hushmandi K, Zabolian A, Bikarannejad P, Hashemi M, Daneshi S, Mirzaei S, Sharifi E, Kumar AP, Khan H, Heydari Sheikh Hossein H, Vosough M, Rabiee N, Thakur Kumar V, Makvandi P, Mishra YK, Tay FR, Wang Y, Zarrabi A, Orive G, Mostafavi E. Doxorubicin-loaded graphene oxide nanocomposites in cancer medicine: Stimuli-responsive carriers, co-delivery and suppressing resistance. Expert Opin Drug Deliv 2022; 19:355-382. [PMID: 35152815 DOI: 10.1080/17425247.2022.2041598] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
INTRODUCTION The application of doxorubicin (DOX) in cancer therapy has been limited due to its drug resistance and poor internalization. Graphene oxide (GO) nanostructures have the capacity for DOX delivery while promoting its cytotoxicity in cancer. AREAS COVERED The favorable characteristics of GO nanocomposites, preparation method, and application in cancer therapy are described. Then, DOX resistance in cancer is discussed. The GO-mediated photothermal therapy and DOX delivery for cancer suppression are described. Preparation of stimuli-responsive GO nanocomposites, surface functionalization, hybrid nanoparticles, and theranostic applications are emphasized in DOX chemotherapy. EXPERT OPINION Graphene oxide nanoparticle-based photothermal therapy maximizes the anti-cancer activity of DOX against cancer cells. Apart from DOX delivery, GO nanomaterials are capable of loading anti-cancer agents and genetic tools to minimize drug resistance and enhance the cytolytic impact of DOX in cancer eradication. To enhance DOX accumulation in cancer cells, stimuli-responsive (redox-, light-, enzyme- and pH-sensitive) GO nanoparticles have been developed for DOX delivery. Further development of targeted delivery of DOX-loaded GO nanomaterials against cancer cells may be achieved by surface modification of polymers such as polyethylene glycol, hyaluronic acid, and chitosan. Doxorubicin-loaded GO nanoparticles have demonstrated theranostic potential for simultaneous diagnosis and therapy. Hybridization of GO with other nanocarriers such as silica and gold nanoparticles further broadens their potential anti-cancer therapy applications.
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Affiliation(s)
- Milad Ashrafizadeh
- Faculty of Engineering and Natural Sciences, Sabanci University, Orta Mahalle, Üniversite Caddesi No. 27, Orhanlı, Tuzla, 34956 Istanbul, Turkey
| | - Hamidreza Saebfar
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mohammad Hossein Gholami
- DVM. Graduated, Faculty of Veterinary Medicine, Kazerun Branch, Islamic Azad University, Kazerun, Iran
| | - Kiavash Hushmandi
- Department of Food Hygiene and Quality Control, Division of epidemiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Amirhossein Zabolian
- Department of Orthopedics, School of Medicine, 5th Azar Hospital, Golestan University of Medical Sciences, Golestan, Iran
| | - Pooria Bikarannejad
- Young Researchers and Elite Club, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mehrdad Hashemi
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Salman Daneshi
- Department of Public Health, School of Health, Jiroft University of Medical Sciences, Jiroft, Iran
| | - Sepideh Mirzaei
- Department of Biology, Faculty of Science, Islamic Azad University, Science and Research Branch, Tehran, Iran
| | - Esmaeel Sharifi
- Department of Tissue Engineering and Biomaterials, School of Advanced Medical Sciences and Technologies, Hamadan University of Medical Sciences, 6517838736 Hamadan, Iran
| | - Alan Prem Kumar
- NUS Center for Cancer Research, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117600, Singapore.,Cancer Science Institute of Singapore and Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117599, Singapore
| | - Haroon Khan
- Department of Pharmacy, Abdul Wali Khan University, Mardan 23200, Pakistan
| | | | - Massoud Vosough
- Department of Regenerative Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Navid Rabiee
- Department of Chemistry, Sharif University of Technology, Tehran, Iran.,School of Engineering, Macquarie University, Sydney, New South Wales, 2109, Australia
| | - Vijay Thakur Kumar
- Biorefining and Advanced Materials Research Center, Scotland's Rural College (SRUC), Kings Buildings, West Mains Road, Edinburgh EH9 3JG, U.K.,School of Engineering, University of Petroleum & Energy Studies (UPES), Dehradun 248007, Uttarakhand, India
| | - Pooyan Makvandi
- Istituto Italiano di Tecnologia, Centre for Materials Interface, viale Rinaldo Piaggio 34, 56025 Pontedera, Pisa, Italy
| | - Yogendra Kumar Mishra
- Mads Clausen Institute, NanoSYD, University of Southern Denmark, 6400 Sønderborg, Denmark
| | - Franklin R Tay
- The Graduate School, Augusta University, Augusta, GA, USA
| | - Yuzhuo Wang
- Department of Urological Sciences and Vancouver Prostate Centre, University of British Columbia, Vancouver, BC, V6H3Z6, Canada
| | - Ali Zarrabi
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences, Istinye University, Sariyer 34396, Istanbul, Turkey
| | - Gorka Orive
- NanoBioCel Research Group, School of Pharmacy, University of the Basque Country (UPV/EHU), Vitoria-Gasteiz, Spain.,Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN). Vitoria-Gasteiz, Spain.,University Institute for Regenerative Medicine and Oral Implantology - UIRMI (UPV/EHUFundación Eduardo Anitua). Vitoria-Gasteiz, Spain.,Bioaraba, NanoBioCel Research Group, Vitoria-Gasteiz, Spain.,Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower, Singapore
| | - Ebrahim Mostafavi
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, 94305, USA.,Department of Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
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Magne TM, de Oliveira Vieira T, Alencar LMR, Junior FFM, Gemini-Piperni S, Carneiro SV, Fechine LMUD, Freire RM, Golokhvast K, Metrangolo P, Fechine PBA, Santos-Oliveira R. Graphene and its derivatives: understanding the main chemical and medicinal chemistry roles for biomedical applications. JOURNAL OF NANOSTRUCTURE IN CHEMISTRY 2021; 12:693-727. [PMID: 34512930 PMCID: PMC8419677 DOI: 10.1007/s40097-021-00444-3] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 08/30/2021] [Indexed: 05/05/2023]
Abstract
Over the past few years, there has been a growing potential use of graphene and its derivatives in several biomedical areas, such as drug delivery systems, biosensors, and imaging systems, especially for having excellent optical, electronic, thermal, and mechanical properties. Therefore, nanomaterials in the graphene family have shown promising results in several areas of science. The different physicochemical properties of graphene and its derivatives guide its biocompatibility and toxicity. Hence, further studies to explain the interactions of these nanomaterials with biological systems are fundamental. This review has shown the applicability of the graphene family in several biomedical modalities, with particular attention for cancer therapy and diagnosis, as a potent theranostic. This ability is derivative from the considerable number of forms that the graphene family can assume. The graphene-based materials biodistribution profile, clearance, toxicity, and cytotoxicity, interacting with biological systems, are discussed here, focusing on its synthesis methodology, physicochemical properties, and production quality. Despite the growing increase in the bioavailability and toxicity studies of graphene and its derivatives, there is still much to be unveiled to develop safe and effective formulations. Graphic abstract
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Affiliation(s)
- Tais Monteiro Magne
- Brazilian Nuclear Energy Commission, Nuclear Engineering Institute, Rio de Janeiro, 21941906 Brazil
| | | | - Luciana Magalhães Rebelo Alencar
- Biophysics and Nanosystems Laboratory, Department of Physics, Federal University of Maranhão, São Luis, Maranhão 65080805 Brazil
| | - Francisco Franciné Maia Junior
- Department of Natural Sciences, Mathematics and Statistics, Federal Rural University of the Semi-Arid, Mossoró, RN 59625-900 Brazil
| | - Sara Gemini-Piperni
- Laboratory of Advanced Science, Universidade Unigranrio, Duque de Caxias, RJ 25071-202 Brazil
| | - Samuel V. Carneiro
- Group of Chemistry of Advanced Materials (GQMat)-Department of Analytical Chemistry and Physic-Chemistry, Federal University of Ceará-Campus do Pici, Fortaleza, Ceará 60451-970 Brazil
| | - Lillian M. U. D. Fechine
- Group of Chemistry of Advanced Materials (GQMat)-Department of Analytical Chemistry and Physic-Chemistry, Federal University of Ceará-Campus do Pici, Fortaleza, Ceará 60451-970 Brazil
| | - Rafael M. Freire
- Institute of Applied Chemical Sciences, Universidad Autónoma de Chile, 8910060 Santiago, Chile
| | - Kirill Golokhvast
- Education and Scientific Center of Nanotechnology, School of Engineering, Far Eastern Federal University, Vladivostok, Russia
- N.I. Vavilov All-Russian Institute of Plant Genetic Resources, Saint-Petersburg, Russia
| | - Pierangelo Metrangolo
- Laboratory of Supramolecular and Bio-Nanomaterials, Department of Chemistry, Materials, and Chemical Engineering “Giulio Natta” Politecnico Di Milano, Via L. Mancinelli 7, 20131 Milano, Italy
| | - Pierre B. A. Fechine
- Group of Chemistry of Advanced Materials (GQMat)-Department of Analytical Chemistry and Physic-Chemistry, Federal University of Ceará-Campus do Pici, Fortaleza, Ceará 60451-970 Brazil
| | - Ralph Santos-Oliveira
- Brazilian Nuclear Energy Commission, Nuclear Engineering Institute, Rio de Janeiro, 21941906 Brazil
- Laboratory of Nanoradiopharmacy and Synthesis of Radiopharmaceuticals, Zona Oeste State University, Av Manuel Caldeira de Alvarenga, 200, Campo Grande, Rio de Janeiro, 2100000 Brazil
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6
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Chen J, Hu H, Yang J, Xue H, Tian Y, Fan K, Zeng Z, Yang J, Wang R, Liu Y. Removal behaviors and mechanisms for series of azo dye wastewater by novel nano constructed macro-architectures material. BIORESOURCE TECHNOLOGY 2021; 322:124556. [PMID: 33352393 DOI: 10.1016/j.biortech.2020.124556] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Revised: 12/10/2020] [Accepted: 12/13/2020] [Indexed: 06/12/2023]
Abstract
A novel macro-architectures material Fe3O4-N-GO@sodium alginate (SA) gel film was successfully produced, which was used to remove series azo dye wastewater. The optimal adsorption rates were attained, which achieved the maximum removal efficiency of 74.22%, 45.72%, 37.75% for Congo Red, Acid Orange 7 and Amino Black 10B respectively, under the condition that the mass ratio of Fe3O4-N-GO to sodium alginate was 0.11. The optimal adsorption temperature for three dyes was 30 ℃ and the adsorption equilibrium was reached at 150 min. The adsorption kinetic model of Fe3O4-N-GO@SA for the three azo dyes conformed to the quasi-second-order reaction model, and the adsorption isotherm was more in line with the Freundlich adsorption. The adsorption mechanism was multi-layer heterogeneous adsorption under the combined action of physical adsorption and chemisorption, and chemisorption was the main step of controlling the speed. The study would provide theoretical basis for the application of macro-architectures material in environment.
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Affiliation(s)
- Junfeng Chen
- Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China.
| | - Hanwen Hu
- Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China
| | - Junhan Yang
- Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China
| | - Hanhan Xue
- Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China
| | - Yuping Tian
- Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China
| | - Keyan Fan
- Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China
| | - Zhixin Zeng
- Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China
| | - Jiaqi Yang
- Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China
| | - Renjun Wang
- Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China
| | - Yanyan Liu
- Department of Environmental Science, School of Life Science, Qufu Normal University, Qufu 273165, PR China
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7
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Wei L, Lu Z, Ji X, Jiang Y, Ma L. Self-Assembly of Hollow Graphene Oxide Microcapsules Directed by Cavitation for Loading Hydrophobic Drugs. ACS APPLIED MATERIALS & INTERFACES 2021; 13:2988-2996. [PMID: 33403846 DOI: 10.1021/acsami.0c16550] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Hollow graphene oxide microcapsules (GOMs) have been widely used in energy, electronics, catalysis, sensing, tissue engineering, and drug loading due to their unique properties. However, it is still a great challenge to prepare GOMs with high quality and in large quantity using a simple method. In this work, we obtained single-component GOMs using the liquid nitrogen cavitation effect, which directed the self-assembly of graphene oxide (GO) debris at the gas-liquid interface. This method avoids the introduction of additional components and removal of templates. The morphology of GOM with wrinkles on its surface was characterized by transmission electron microscopy and scanning electron microscopy. The abundant polar groups of GO microcapsules enabled them to easily disperse in water. Based on this, GOMs have good potential for loading hydrophobic drugs. Subsequently, we used GOMs as carriers to deliver a hydrophobic drug paclitaxel (PTX), which exhibited a good loading capacity. Moreover, PTX loaded GOMs showed excellent cytotoxicity to A549 and MDA-MB-231 cells. The GOMs also showed a pH-dependent drug release performance. Therefore, GOMs can be regarded as potential carriers for biomedical applications.
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Affiliation(s)
- Luyao Wei
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Zhiquan Lu
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Xiang Ji
- Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Yike Jiang
- State Key Laboratory of Chemical Oncogenomics, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Lan Ma
- Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Institute of Biopharmaceutical and Health Engineering, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- State Key Laboratory of Chemical Oncogenomics, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
- Institute of Biomedical Health Technology and Engineering, Shenzhen Bay Laboratory, Shenzhen 518055, China
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Patil R, Ray D, Aswal VK, Bussy C, Bahadur P, Tiwari S. Adsorption of P103 Nanoaggregates on Graphene Oxide Nanosheets: Role of Electrostatic Forces in Improving Nanosheet Dispersion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:867-873. [PMID: 33400877 DOI: 10.1021/acs.langmuir.0c03206] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Graphene oxide (GO) nanosheet suspension is not stable in physiological ionic fluids. To improve stability, surfactants such as Pluronic 103 (P103) have been tested. Going further, this work investigated whether conferring positive surface charge to the surfactant may improve the adsorption ability of P103 micelles on GO sheets. Positive charge on the surfactant was induced by adding dodecyltrimethylammonium bromide (DTAB, a cationic surfactant) in P103 micelles. Subsequent changes in aggregation parameters were investigated through dynamic light scattering and small-angle neutron scattering studies. DTAB incorporation was accompanied by a steady increase in the ζ potential and mixed micelle formation. At high surface charge density, the interaction between adjacent head groups was distorted, which led to dissociation of mixed micelles. Structural developments during the adsorption of mixed micelles on the sheet surface (mass fractal formation) were monitored in terms of changes in the scattering features of aggregates. These fractals emerged as a result of electrostatic interactions. Our observations point toward the existence of small-sized building blocks at low DTAB concentration (≤4 mM). With a superior adsorption, mixed micelles are expected to occupy the intersheet space and maintain a hydration layer. However, at a higher DTAB concentration (≥10 mM), micelles dissociate to produce DTAB-rich unimers and P103-rich loose aggregates. At this point, sheets tend to aggregate in the solvent, regardless of fractal formation.
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Affiliation(s)
- Rahul Patil
- Maliba Pharmacy College, UKA Tarsadia University, Gopal-Vidyanagar Campus, Surat 394350, India
| | - Debes Ray
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Vinod K Aswal
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Cyrill Bussy
- Nanomedicine Lab, School of Biological Sciences, and Lydia Becker Institute of Immunology and Inflammation, Faculty of Biology, Medicine & Health, The University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PR, U.K
- National Graphene Institute, The University of Manchester, Manchester M13 9PR, U.K
| | - Pratap Bahadur
- Department of Chemistry, Veer Narmad South Gujarat University, Surat 395007, India
| | - Sanjay Tiwari
- Maliba Pharmacy College, UKA Tarsadia University, Gopal-Vidyanagar Campus, Surat 394350, India
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