Automated Device for Vertical Deposition of Colloidal Opal Films

Kuleshova, Vera L.; Panfilova, E. V.; Prohorov, Evgeniy P.

doi:10.1109/rusautocon.2018.8501782

Cited by 8 publications

(3 citation statements)

References 24 publications

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“…The approach elaborated in the study can therefore be applied to the analysis of an extensive gamut of colloidal assemblies investigated not only with SEM, but also via other techniques, for instance, atomic force microscopy and scanning near field optical microscopy [65,66,67,68,69,70]. Applications to nanoscale and atomic systems could be envisaged due to developments in high resolution transmission electron microscopy and other techniques, which can provide real-space local structure imaging besides the more widespread reciprocal space information inferred from scattering experiments [71,72].…”

Section: Discussionmentioning

confidence: 99%

A Journey Through the Landscapes of Small Particles in Binary Colloidal Assemblies: Unveiling Structural Transitions from Isolated Particles to Clusters upon Variation in Composition

Lotito

Zambelli

2019

Nanomaterials

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Two-dimensional (2D) amorphous binary colloidal assemblies composed of particles of two different sizes are characterized by the loss of hexagonal close-packing for larger particles, occurring when the size ratio between small (S) and large (L) particles dSdL exceeds a certain threshold value. For moderately low particle number ratios NSNL large particles still retain a denser arrangement with transitions from hexagonal symmetry to the coexistence of different types of symmetries as NSNL progressively departs from 0 to higher values. On the other hand, small particles reveal sparser arrangements: shape identification and quantification of structural transitions in small particle arrangements appear particularly challenging. In this article, we investigate their shapes and transitions for amorphous binary colloidal particles assembled at the air/water interface. For the quantitative characterization of the evolution in particle arrangements for NSNL variable between 0.5 and 2, we develop an innovative procedure for morphological analysis, combining Minkowski functionals, Voronoi diagrams and ad hoc techniques to recognize and classify specific features. Such a powerful approach has revealed a wide variety of landscapes featuring isolated particles, dimers, chains, small clusters evolving with the colloidal suspension composition. Our method can be applied to the analysis of spatial configurations of sparse colloidal patterns obtained in different conditions.

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Section: Discussionmentioning

confidence: 99%

A Journey Through the Landscapes of Small Particles in Binary Colloidal Assemblies: Unveiling Structural Transitions from Isolated Particles to Clusters upon Variation in Composition

Lotito

Zambelli

2019

Nanomaterials

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“…The key feature to produce an opal film lies in the perfect arrangement of the underlying monodisperse particles. As those particles feature the capability of self-assembling into highly ordered structures, methods, such as vertical deposition or spin-coating, provide convenient ways for the opal film fabrication [ 18 , 19 , 20 ]. Another way to gain access to free-standing opal films is the so-called melt-shear organization [ 10 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Embedding Photoacids into Polymer Opal Structures: Synergistic Effects on Optical and Stimuli-Responsive Features

et al. 2021

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Opal films with their vivid structural colors represent a field of tremendous interest and obtained materials offer the possibility for many applications, such as optical sensors or anti-counterfeiting materials. A convenient method for the generation of opal structures relies on the tailored design of core-interlayer-shell (CIS) particles. Within the present study, elastomeric opal films were combined with stimuli-responsive photoacids to further influence the optical properties of structurally colored materials. Starting from cross-linked polystyrene (PS) core particles featuring a hydroxy-rich and polar soft shell, opal films were prepared by application of the melt-shear organization technique. The photoacid tris(2,2,2-trifluoroethyl) 8-hydroxypyrene-1,3,6-trisulfonate (TFEHTS) could be conveniently incorporated during freeze-drying the particle dispersion and prior to the melt-shear organization. Furthermore, the polar opal matrix featuring hydroxylic moieties enabled excited-state proton transfer (ESPT), which is proved by spectroscopic evaluation. Finally, the influence of the photoacid on the optical properties of the 3-dimensional colloidal crystals were investigated within different experimental conditions. The angle dependence of the emission spectra unambiguously shows the selective suppression of the photoacid’s fluorescence in its deprotonated state.

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“…Students can, depending on their background and interests, choose the research fields such as processing techniques, specialized equipment and key materials of electronics, nanoelectronics and nanoengineering. In their research, they are engaged in the development of technologies, machines and mechanisms, for example, vacuum technics [4,5], vacuum [6,7] and colloidal [8,9] thin films deposition processes, various lithographic and etching processes, etc. The range of tasks that students solve is very wide.…”

Section: Introductionmentioning

confidence: 99%

Skill Oriented Online Master’s Course “Neural Network Modeling of Complex Technical Systems”

Panfilova

2020

ITM Web Conf.

Self Cite

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In this paper we consider the application of online course “Neural Network modeling of Complex Technical Systems” in the Master’s degree programs in the field of nanotechnology and nanoengineering in Bauman Moscow State Technical University. The course has rather practical than theoretical nature. The aim of this course is skill oriented learning. Nowadays neural network models have become a powerful tool of scientific research for engineers and students. The methods studied during the study of the discipline can be applied to estimation, modeling, classification, clustering, forecasting and more. The neural networks modeling plays a significant role in Master’s education and student’s research work. Neural Networks models are successfully presented in graduation theses. Thanks to online educations students can practice at their own pace and study modern neural networks software products, methods of data preparing, designing and training neural network and then apply these algorithms in practice. According to the steps of neural network modeling algorithm the course consists of three main parts and conclusive one. In this paper course structure and study results are presented.

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Automated Device for Vertical Deposition of Colloidal Opal Films

Cited by 8 publications

References 24 publications

A Journey Through the Landscapes of Small Particles in Binary Colloidal Assemblies: Unveiling Structural Transitions from Isolated Particles to Clusters upon Variation in Composition

A Journey Through the Landscapes of Small Particles in Binary Colloidal Assemblies: Unveiling Structural Transitions from Isolated Particles to Clusters upon Variation in Composition

Embedding Photoacids into Polymer Opal Structures: Synergistic Effects on Optical and Stimuli-Responsive Features

Skill Oriented Online Master’s Course “Neural Network Modeling of Complex Technical Systems”

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