Highly oriented surface-growth and covalent dye labeling of mesoporous metal-organic frameworks

Mesoporous amino-functionalized metal-organic framework thin films with the UiO-68 topology were grown in a highly oriented fashion on two different self-assembled monolayers on gold. The oriented MOF films were covalently modified with the fluorescent dye Rhodamine B inside the pore system, as demonstrated with size-selective fluorescence quenching studies. Our study suggests that mesoporous metal-organic frameworks are promising hosts for the covalent attachment of numerous functional moieties in a molecularly designed crystalline environment. © The Royal Society of Chemistry 2012

Implementing chemical functionality into oriented films of metal–organic frameworks on self-assembled monolayers

The generation of thin films of oriented functionalized metal–organic frameworks (MOFs) on self-assembled monolayers was achieved via direct growth from solution. Specifically, the direct growth from solvothermally pretreated synthesis solutions of two different MOF structures with amino functionality was investigated: the flexible framework structure NH2–Fe–MIL-88B and the mesoporous MOF NH2–Fe–MIL-101 with its remarkably large unit cell. Both MOF structures can be grown in a highly oriented fashion on self-assembled monolayers of 16-mercaptohexadecanoic acid on gold. With the help of a quartz crystal microbalance we demonstrate that the introduction of amino groups into the framework strongly affects the host–guest interactions towards ethanol molecules: thin films of NH2–Fe–MIL-88B show a significantly higher uptake of ethanol than unfunctionalized Fe–MIL-88B films. In situ XRD experiments during sorption of ethanol showed that the amino group does have an impact on the cell parameters of the structure, but the flexibility ("breathing") during ad- and desorption of ethanol is similar for the functionalized and the unfunctionalized structures. It is anticipated that the implementation of chemical functionalities into oriented MOF films will lead to selective host–guest interactions that are of key importance for chemical sensing and other applications

One-dimensional metal-organic framework photonic crystals used as platforms for vapor sorption.

We present the fabrication of one-dimensional photonic crystals (Bragg stacks) based on a microporous metal–organic framework material and mesoporous titanium dioxide. The Bragg stack heterostructures were obtained using two complementary synthesis approaches utilizing the bottom-up assembly of heterogeneous, i.e. two-component photonic crystal multilayer structures. Zeolitic imidazolate framework ZIF-8 and mesoporous titanium dioxide were chosen as functional components with different refractive indices. While ZIF-8 is intended to impart molecular selectivity, mesoporous TiO2 is used to ensure high refractive index contrast and to guarantee molecular diffusion within the Bragg stack. The combination of micro- and mesoporosity within one scaffold endows the 1D-MOF PC with characteristic adsorption properties upon exposure to various organic vapors. In this context, the sorption behavior of the photonic material was studied as a function of partial pressure of organic vapors. The results show that the multilayered photonic heterostructures are sensitive and selective towards a series of chemically similar solvent vapors. It is thus anticipated that the concept of multilayer heterogeneous photonic structures will provide a versatile platform for future selective, label-free optical sensors

Nanoimprinted, Submicrometric, MOF-Based 2D Photonic Structures: Toward Easy Selective Vapors Sensing by a Smartphone Camera

International audience2D photonic metal–oxide-framework-based homo- and hetero-structures are fabricated by soft lithographic approaches. As shown by A. Cattoni, M. Faustini and co-workers, these materials can be used as selective photonic sensing platforms. Detection of toxic vapors such as styrene are performed using an easy transduction method, compatible with smart-phone camera technologies

Photonic hydrogel sensors

Analyte-sensitive hydrogels that incorporate optical structures have emerged as sensing platforms for point-of-care diagnostics. The optical properties of the hydrogel sensors can be rationally designed and fabricated through self-assembly, microfabrication or laser writing. The advantages of photonic hydrogel sensors over conventional assay formats include label-free, quantitative, reusable, and continuous measurement capability that can be integrated with equipment-free text or image display. This Review explains the operation principles of photonic hydrogel sensors, presents syntheses of stimuli-responsive polymers, and provides an overview of qualitative and quantitative readout technologies. Applications in clinical samples are discussed, and potential future directions are identified

Software support for TSP subjects organisation

Bakalářská práce se zabývá návrhem systému pro podporu organizace předmětu TSP. Cílem je navrhnout a implementovat robustní webovou aplikaci s řízeným přístupem, která vychází ze specifikace předmětu. Součástí práce je zvolení vhodného frameworku, popsání případů užití a sestavení struktury modelu databáze. Návrh aplikace zohledňuje požadavky na modularitu, responzivitu a možnosti budoucího rozšíření. Při vývoji aplikace byl kladen důraz zejména na použitelnost, spolehlivost a bezpečnost. Výsledná aplikace je důkladně otestována připravenými testy.ObhájenoThe bachelor thesis deals with the design of a system to support the organization of TSP subjects. The aim is to design and implement a robust web application with controlled access, which is based on the specification of the subject. Part of the work is to select a suitable framework, describe use cases and build the structure of the database model. The design of the application takes into account the requirements for modularity, responsiveness and possibilities for future expansion. During the development of the application, emphasis was placed especially on usability, reliability and security. The resulting application is thoroughly tested with prepared tests

Software support for TSP subjects organisation

Bakalářská práce se zabývá návrhem systému pro podporu organizace předmětu TSP. Cílem je navrhnout a implementovat robustní webovou aplikaci s řízeným přístupem, která vychází ze specifikace předmětu. Součástí práce je zvolení vhodného frameworku, popsání případů užití a sestavení struktury modelu databáze. Návrh aplikace zohledňuje požadavky na modularitu, responzivitu a možnosti budoucího rozšíření. Při vývoji aplikace byl kladen důraz zejména na použitelnost, spolehlivost a bezpečnost. Výsledná aplikace je důkladně otestována připravenými testy.ObhájenoThe bachelor thesis deals with the design of a system to support the organization of TSP subjects. The aim is to design and implement a robust web application with controlled access, which is based on the specification of the subject. Part of the work is to select a suitable framework, describe use cases and build the structure of the database model. The design of the application takes into account the requirements for modularity, responsiveness and possibilities for future expansion. During the development of the application, emphasis was placed especially on usability, reliability and security. The resulting application is thoroughly tested with prepared tests

G. F. Händel - Opera production, analysis of opera Alcina

There is introduced G.F.Händel personality and his production.In the following chapter, there is analyzed a story as a model for opera Alcina libreto.The last part of chapter contains L. Arioso biography who is an author of the epic " Orlando furioso".The analysis of opera Alcina is bringing near composerś access to his opus and also this work is extended by figure´s character. The following part Alcina figures and summary is closing up whole first theoretical chapter. The practical part is drafted from a view of a script and project of Alcina direction