Compression Speed as a Parameter Changing the Dimensionality of Corrole Nanostructures in Layers at the Air-Water Interface

Vu, Thao T.; Kharitonova, Nadezhda V.; Maiorova, Larissa A.; Громова, О. А.; Torshin, I. Yu.; Койфман, О. И.

doi:10.6060/mhc171260m

Cited by 5 publications

(5 citation statements)

References 38 publications

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“…It becomes clear after analysis of compression isotherms in the coordinates of π A –(π). The method of π A –(π) compression isotherm analysis is given in articles. , Here, the x axis is the alteration of surface pressure, and the y -axis is a product of surface pressure (π) and area per elementary cell ( A 0e ). This approach allows to determine the presence of single-phase conditions in the monolayer.…”

Section: Resultsmentioning

confidence: 99%

Morphology of Mixed Langmuir and Langmuir–Schaefer Monolayers with Covered CdSe/CdS/ZnS Quantum Dots and Arachidic Acid

et al. 2021

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The process of formation of a Langmuir−Schaefer (LS) matrix based on a mixed monolayer of arachidic acid (AA) and 8 nm CdSe/CdS/ZnS quantum dots (QDs) stabilized by molecules of trioctylphosphine oxide (TOPO) was investigated. The change in the morphology, monolayer compressibility, and area per elementary cell of the created mixed monolayers, depending on the ratio of the components, was studied. It is shown that the change in the morphology of Langmuir−Blodgett (LB) monolayers begins to occur at a ratio between the number of QDs and AA molecules of 1:24. Dendrimeric structures with a thickness of the order of 30−40 nm appear in the mixed monolayer when LB film deposition was carried out above the collapse surface pressure of a Langmuir film from only TOPOcovered QDs. Information on the dependence of the morphology of such structures on the molar ratio of the components is necessary for the production of ordered 2D nanostructures containing 0D and 1D objects with quantum bonds. Such nanostructures can be used in nanoelectronic and optoelectronic devices as a sensitive sensor element. The obtained results would be relevant for any type of spherical shape nanoparticles.

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Section: Resultsmentioning

confidence: 99%

Morphology of Mixed Langmuir and Langmuir–Schaefer Monolayers with Covered CdSe/CdS/ZnS Quantum Dots and Arachidic Acid

et al. 2021

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“…It was shown earlier that metal free 5,10,15-triphenylcorrole in floating at the air-water interface layers and in LS films forms stable nanostructures of different types. [53,[63][64]66] In this work, the structure and properties of floating layers of copper 5,10,15-triphenylcorrole at the air-water interface in a wide range of initial surface coverage degrees (c face /c edge from 4/2.5 % to 93/58 %, Figure 2) were studied.…”

Section: Resultsmentioning

confidence: 99%

An Influence of Copper Cation in the Complex on Structure of the Nanostructured Layers, Spectral and Electrocatalytic Characteristics of Langmuir-Schaeffer Films of Triphenylcorrole

Berezina¹,

Vu²,

Kharitonova³

et al. 2019

MHC

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An influence of copper cation in the complex on structure and properties of the floating layers of 5,10,15-triphenylcorrole (Cu[(ms-Ph) 3 Cor]) at the air-water interface was studied. The structure of the layers has been determined using the method of quantitative analysis of compression isotherms. A model of stable nanostructured layers of the substance has been constructed. Copper cation in the macrocycle increases the density of two-dimensional M-nanoaggregates, while the number of molecules in such aggregates experiences 2-3-fold growth. Like the metal-free triphenylcorrole, this copper-containing compound in multilayer Langmuir-Schaeffer (LS) films with edge-on arrangement of molecules forms aggregates with strong intermolecular interactions. Such LS films may be suitable for electrocatalysis in the oxygen reduction reaction.

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“…The specific area per DPPE molecule in the condensed phase (A 0 ) and the compression modulus (k) of the Langmuir monolayer were determined using the obtained π-A isotherms [66]. The A 0 value was determined using a tangent drawn to the π-A section of the III-IV isotherm corresponding to the condensed phase of the monolayer.…”

Section: Formation Of a Sensitive Coating Based On The Lb Film Of Pho...mentioning

confidence: 99%

Langmuir–Blodgett Films with Immobilized Glucose Oxidase Enzyme Molecules for Acoustic Glucose Sensor Application

Gorbachev

Smirnov

Ivanov

et al. 2023

Sensors

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In this work, a sensitive coating based on Langmuir–Blodgett (LB) films containing monolayers of 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE) with an immobilized glucose oxidase (GOx) enzyme was created. The immobilization of the enzyme in the LB film occurred during the formation of the monolayer. The effect of the immobilization of GOx enzyme molecules on the surface properties of a Langmuir DPPE monolayer was investigated. The sensory properties of the resulting LB DPPE film with an immobilized GOx enzyme in a glucose solution of various concentrations were studied. It has shown that the immobilization of GOx enzyme molecules into the LB DPPE film leads to a rising LB film conductivity with an increasing glucose concentration. Such an effect made it possible to conclude that acoustic methods can be used to determine the concentration of glucose molecules in an aqueous solution. It was found that for an aqueous glucose solution in the concentration range from 0 to 0.8 mg/mL the phase response of the acoustic mode at a frequency of 42.7 MHz has a linear form, and its maximum change is 55°. The maximum change in the insertion loss for this mode was 18 dB for a glucose concentration in the working solution of 0.4 mg/mL. The range of glucose concentrations measured using this method, from 0 to 0.9 mg/mL, corresponds to the corresponding range in the blood. The possibility of changing the conductivity range of a glucose solution depending on the concentration of the GOx enzyme in the LB film will make it possible to develop glucose sensors for higher concentrations. Such technological sensors would be in demand in the food and pharmaceutical industries. The developed technology can become the basis for creating a new generation of acoustoelectronic biosensors in the case of using other enzymatic reactions.

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Compression Speed as a Parameter Changing the Dimensionality of Corrole Nanostructures in Layers at the Air-Water Interface

Cited by 5 publications

References 38 publications

Morphology of Mixed Langmuir and Langmuir–Schaefer Monolayers with Covered CdSe/CdS/ZnS Quantum Dots and Arachidic Acid

Morphology of Mixed Langmuir and Langmuir–Schaefer Monolayers with Covered CdSe/CdS/ZnS Quantum Dots and Arachidic Acid

An Influence of Copper Cation in the Complex on Structure of the Nanostructured Layers, Spectral and Electrocatalytic Characteristics of Langmuir-Schaeffer Films of Triphenylcorrole

Langmuir–Blodgett Films with Immobilized Glucose Oxidase Enzyme Molecules for Acoustic Glucose Sensor Application

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