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Makiura R. Creation of metal–organic framework nanosheets by the Langmuir-Blodgett technique. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Possarle LHRR, Siqueira Junior JR, Caseli L. Insertion of carbon nanotubes in Langmuir-Blodgett films of stearic acid and asparaginase enhancing the catalytic performance. Colloids Surf B Biointerfaces 2020; 192:111032. [PMID: 32330820 DOI: 10.1016/j.colsurfb.2020.111032] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/05/2020] [Accepted: 04/09/2020] [Indexed: 11/22/2022]
Abstract
In this paper, carbon nanotubes (CNT) were adsorbed on stearic acid (SA) Langmuir monolayers to serve as matrices for the incorporation of asparaginase. The interaction between the components at the air-water interface was evaluated by surface pressure-area isotherms, surface potential-area isotherms, polarization-modulation reflection absorption infrared spectroscopy (PM-IRRAS), and Brewster angle microscopy (BAM). The enzyme expanded the monolayers and changed the thermodynamic and electrical properties of the SA-CNT monolayers, as detected with the isotherms. PM-IRRAS spectra showed that the enzyme keeps its secondary structure when adsorbed at the monolayers and also alters the morphology of the air-water interface, as identified with BAM. The hybrid floating films were transferred to solid supports through the Langmuir-Blodgett (LB) technique, and the cotransfer of the enzyme was confirmed with fluorescence spectroscopy. The catalytic activity of asparaginase in the LB films was studied with UV-vis spectroscopy, which showed that the presence of CNT in the enzyme-lipid LB film not only tuned the catalytic activity, but also helped conserve its enzyme activity after weeks, showing higher persisting values of activity. UV-vis spectroscopy also showed that the catalytic activity is dependent basically on the enzyme molecules present on the surface of the LB films since multilayer films did not provide a proportional increase of enzyme activity. These results are related to the synergism between the compounds on the active layer, leading to a molecular architecture that allowed the adequate molecular accommodation of the analyte with the catalytic sites of the enzyme, which also preserved the asparaginase activity. This work then demonstrates the feasibility of employing LB films composed of fatty acids, CNT, and enzymes as devices for biosensing applications.
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Affiliation(s)
| | - José Roberto Siqueira Junior
- Institute of Exact Sciences, Natural and Education, Federal University of Triângulo Mineiro (UFTM), 38064-200 Uberaba, MG, Brazil
| | - Luciano Caseli
- Institute of Environmental, Chemical and Pharmaceutical Sciences, Federal University of São Paulo (UNIFESP), 09913-030 Diadema, SP, Brazil.
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Furtado FADS, Escobar JFBO, Martinez AM, Giordani C, Caiut JMA, Caseli L, Molina C. Molecular Information on the Potential of Europium Complexes for Local Recognition of a Nucleoside-Based Drug by Using Nanostructured Interfaces Assembled as Langmuir-Blodgett Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:3843-3852. [PMID: 32207954 DOI: 10.1021/acs.langmuir.0c00708] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The production of nanostructured materials for biological and medical applications may be applied toward the conjugation of adequate substances to boost the stimulus response of sensors and diagnostic probes. In this sense, Langmuir-Blodgett films constituted of bioinspired and biomimetic materials have attracted attention because of the ease of manipulation of the molecular architecture. In this paper, we employed a nucleoside-based drug, which was linked with a sterol hydrophobic moiety (3',4'-acetonide-uridine-succinate-cholesterol conjugate) to provide it an amphiphilic character. The drug was spread on the air-water interface, alone or mixed with stearic acid, forming Langmuir monolayers, and the complex Eu(tta)3(H2O)2 was incorporated in the drug-containing monolayer. Interactions at the air-water interface between stearic acid, the drug, and the europium complex were then investigated with tensiometry, surface potential, infrared spectroscopy, and Brewster angle microscopy. The Langmuir films were transferred to solid supports as Langmuir-Blodgett films, which presented luminescent properties that could be tuned according to the molecular architecture. We believe that these results can serve as a novel approach to characterize and assemble materials organized in the molecular scale for medical applications.
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Affiliation(s)
| | - Jhon Fernando Berrı O Escobar
- Marine Natural Products, Department of Pharmacy, Faculty of Pharamaceutiacal and Food Sciences, University of Antioquia, UdeA, Medellín, Antioquia 050010, Colombia
| | - Alejandro Martinez Martinez
- Marine Natural Products, Department of Pharmacy, Faculty of Pharamaceutiacal and Food Sciences, University of Antioquia, UdeA, Medellín, Antioquia 050010, Colombia
| | - Cristiano Giordani
- Marine Natural Products, Department of Pharmacy, Faculty of Pharamaceutiacal and Food Sciences, University of Antioquia, UdeA, Medellín, Antioquia 050010, Colombia
- Institute of Physics, University of Antioquia, UdeA, Medellín, Antioquia 050010, Colombia
| | - José Maurício Almeida Caiut
- Department of Chemistry, Faculty of Philosophy, Sciences and Letters, University of São Paulo, Ribeirão Preto, São Paulo 09913-030, Brazil
| | - Luciano Caseli
- Department of Chemistry, Federal University of São Paulo, Diadema, São Paulo 09913-030, Brazil
| | - Celso Molina
- Department of Chemistry, Federal University of São Paulo, Diadema, São Paulo 09913-030, Brazil
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Surface properties of a single perfluoroalkyl group on water surfaces studied by surface potential measurements. J Colloid Interface Sci 2016; 483:353-359. [DOI: 10.1016/j.jcis.2016.08.055] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 08/18/2016] [Accepted: 08/20/2016] [Indexed: 11/19/2022]
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Bolaños-García VM, Ramos S, Castillo R, Xicohtencatl-Cortes J, Mas-Oliva J. Monolayers of Apolipoproteins at the Air/Water Interface. J Phys Chem B 2001. [DOI: 10.1021/jp010714b] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dudkowiak A, Kusumi T, Nakamura C, Miyake J. Spectroscopic properties of bacteriochlorophyll c in Langmuir monolayers in the absence and presence of amphiphilic peptides. J Photochem Photobiol A Chem 2000. [DOI: 10.1016/s1010-6030(00)00270-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Morita T, Kimura S, Imanishi Y. Efficient Photoreduction of Cytochrome c in the Presence of a Bilayer Membrane of N-Ethylcarbazole-Containing Amphiphiles. CHEM LETT 2000. [DOI: 10.1246/cl.2000.488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bolaños-García VM, Mas-Oliva J, Ramos S, Castillo R. Phase Transitions in Monolayers of Human Apolipoprotein C-I. J Phys Chem B 1999. [DOI: 10.1021/jp984342r] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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