Formation of periodic size-segregated stripe pattern via directed self-assembly of binary colloids and its mechanism

Das, Sayantan; Duraia, El‐Shazly M.; Velev, Orlin D.; Amiri, Maedeh D.; Beall, Gary W.

doi:10.1016/j.apsusc.2017.11.142

Cited by 14 publications

(11 citation statements)

References 32 publications

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“…This type of surface has been found to have a diverse range of applications, including fabricating membranes, sensors, and optoelectronic devices . There are many approaches for fabricating these coatings such as vertical evaporation, assemble at interfaces, dip coating, layer-by-layer, and convective assembly techniques, which have been summarized previously. − …”

Section: Multichemical Signals On Topographic Featuresmentioning

confidence: 99%

Decoration of Material Surfaces with Complex Physicochemical Signals for Biointerface Applications

Shi

Liu

Zhang

et al. 2020

ACS Biomater. Sci. Eng.

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The surface properties of biomaterials are crucial at controlling biological interactions. Cells or tissues sense different stimuli from surfaces and respond accordingly. A number of studies have reported that fabricating complex stimuli-presenting surfaces is beneficial for mimicking and understanding the in vivo scenario where multi-physicochemical cues are present. Biological responses toward these surfaces could be either negative, such as immune responses, or positive, such as tissue regeneration. An ideal material surface should, therefore, be multifunctional, triggering the desired biological process and suppressing the unwanted side effects. The methods for material surface decoration can be very sophisticated, depending on the applications such as biosensors, medical devices, and/or implants. To date, decorating material surfaces with complex chemistries and topographies is still challenging, and methods are not straightforward. The majority of the methods require multiple steps and combinational approaches that include mask-based techniques, lithography, wet or dry etching, wet chemistry, or vapor-based coatings, among others. Although these methods have been established in the laboratory, easy-to-access and straightforward approaches need to be explored. This Review summarizes the state-of-the-art techniques for generating patterned multichemical and multitopographic signals on material surfaces, and the potential of having these surfaces in biointerface applications.

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Section: Multichemical Signals On Topographic Featuresmentioning

confidence: 99%

Decoration of Material Surfaces with Complex Physicochemical Signals for Biointerface Applications

Shi

Liu

Zhang

et al. 2020

ACS Biomater. Sci. Eng.

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“…It should be noted that binary colloidal assemblies will play an important role in the nearest future in various applications, for example, in colloidal lithography for the fabrication of nanostructures for plasmonic arrays . The formation of highly ordered binary systems has been studied in many works. , The authors used the processes of self-organization of nanosized particles of various sizes to form ordered structures on their basis. , It has been shown that the morphology of the formed structures is determined not only by the interaction between colloidal particles but also their interaction with the subphase . The topology of a binary colloidal structure can change from ideally ordered, such as hexagonal, to percolation, that is, a dendritic structure at different parameters .…”

Section: Introductionmentioning

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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“…In some applications, solutions containing mixtures of particles of different sizes are of interest. As an example, we will mention only some applications: evaporative lithography [1][2][3][4] , diagnostics in medicine 5 , development of biosensors 6 , formation of supraparticles [7][8][9][10] and nanocomposites 11 , creation of photonic crystals 7,12,13 , production of color filters for displays 14 , nanosphere lithography [15][16][17][18] and inkjet printing 19 . Mixtures of particles are also used in other technologies for the formation of structures that are not associated with evaporation, for example, the Langmuir-Blodgett method 20,21 , spin-coating 22 , transfer of a particle monolayer from the liquid-air interface onto an inclined substrate in the process of liquid discharge from a glass container with a tap 23 , etc.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo simulation of particle size separation in evaporating bi-dispersed colloidal droplets on hydrophilic substrates

Zolotarev,

Kolegov

2021

Preprint

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Colloidal droplets are used in a variety of practical applications. Some applications require particles of different sizes. These include medical diagnostic methods, the creation of photonic crystals, the formation of supraparticles, and the production of membranes for biotechnology. Series of experiments have previously shown the possibility of particle separation by their size near the contact line. A mathematical model has been developed to describe this process. Bidispersed colloidal droplets evaporating on a hydrophilic substrate are taken into consideration. A particle monolayer is formed due to the small value of the contact angle near the periphery of such droplets. The shape of the resulting sediment is associated with the coffee ring effect. The model takes into account the particle diffusion and transfer with a capillary flow caused by liquid evaporation. Monte Carlo simulation of particle dynamics has been performed at several values of the solution concentration. The numerical results agree with the experimental observations, in which small particles accumulate closer toward the contact line than large particles.

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Formation of periodic size-segregated stripe pattern via directed self-assembly of binary colloids and its mechanism

Cited by 14 publications

References 32 publications

Decoration of Material Surfaces with Complex Physicochemical Signals for Biointerface Applications

Decoration of Material Surfaces with Complex Physicochemical Signals for Biointerface Applications

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

Monte Carlo simulation of particle size separation in evaporating bi-dispersed colloidal droplets on hydrophilic substrates

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