Finding the right angle: The contact angle of nanoparticles at water/oil interface can be engineered close to 90° by capping with ligands containing carboxylic ester terminal groups. This drives self-assemble into close-packed films (see picture), and thus provides opportunity create two- or three-dimensional homo- heterogeneous nanostructures for electronic, optoelectrical, magnetic applications.

This work presents several metallosupramolecular coordination polyelectrolytes (MEPEs) self-assembled from rigid, pi-conjugated, pyridine ring functionalized bisterpyridines and metal ions. The MEPEs are water-soluble display different colors spanning the entire visible regions. Optical, electrochemical, electrochromic properties of obtained presented. results show that profoundly affected by nature substituents at peripheral rings. Namely, assembled electron-rich OMe group modified ligands...

Based on the interfacial self-assembly of magnetite nanoparticles, we demonstrate formation colloidosomes with shells predominantly composed monolayers liquid-like, close-packed nanoparticles. The gelation aqueous phase agarose leads to robust and water-dispersible nanoparticle colloidosomes, allowing encapsulation various water soluble materials. cutoff obtained is primarily defined by size. This controllable permeability should be great importance for application.

Electrochromic devices fabricated by layer- by-layer assembly of europium-containing polyoxometalate clusters, poly(allylamine hydrochloride), and poly(styrenesulfonate) are investigated (see Figure). A high electrochemical contrast, adequate response time, low operation voltage, power consumption reported. further advantage these is the potential for automating their fabrication.

Self-assembly of various metallo-supramolecular coordination polyelectrolytes (MEPEs) based on pyridine ring functionalized ditopic bis-terpyridines, as well the electrochromic property is presented. MEPEs derived from electron-donating OMe ligands exhibit rapid switching rates, good reversibility, high stability, and an optical memory. The first structure-property relationships are proposed, which needed for de novo design fabrication new materials.

Using electrostatic layer-by-layer self-assembly (ELSA), the formation of multilayers with polyelectrolytes and nanoscopic polyoxometalate (POM) clusters different sizes charges is investigated. The are characterized by UV-vis absorption spectroscopy, optical ellipsometry, cyclic voltammetry, atomic force microscopy. In all cases, it possible to find experimental conditions achieve irreversible adsorption regular multilayer deposition. Most importantly, surface coverage directly related...

We describe the spontaneous self-assembly and superstructure of a discrete surfactant-encapsulated cluster, (DODA)40(NH4)2[(H2O)n⊂Mo132O372(CH3COO)30(H2O)72] (2, n ≈ 50), which consists hollow giant isopolyoxomolybdate core covered by hydrophobic shell dimethyldioctadecylammonium (DODA) cations. The structural characterization these nanoporous core−shell particles is based on small-angle X-ray scattering (SAXS) data solutions encapsulated clusters, TEM investigations, FT-IR UV−vis...

We present a comprehensive study of the partially reduced polyoxomolybdate [H3-Mo57V6(NO)6O183(H2O)18]21-encapsulated in shell dimethyldioctadecylammonium (DODA) surfacmolecules. Treatment an aqueous solution (NH4)21[H3Mo57V6-(NO)6O183(H2O)18] . 65H2O (1a) with trichloromethane surfactant leads to instant transfer encapsulated complex anion into organic phase. Results from vibrational spectroscopy. analytical ultracentrifugation, small-angle X-ray scattering, transmission electron...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface reactions on thin layers of silane coupling agentsDirk G. Kurth and Thomas BeinCite this: Langmuir 1993, 9, 11, 2965–2973Publication Date (Print):November 1, 1993Publication History Published online1 May 2002Published inissue 1 November 1993https://pubs.acs.org/doi/10.1021/la00035a039https://doi.org/10.1021/la00035a039research-articleACS PublicationsRequest reuse permissionsArticle Views2748Altmetric-Citations210LEARN ABOUT THESE...

Nanocarbon superhydrophobic surfaces (NCSSs) with a fractal morphology of the two-tier roughness on nano- and microscopic scale are created from hierarchical, supramolecular objects, which readily prepared by molecular assembly fullerene derivative bearing long aliphatic chains. The high durability fabricated structures is derived enhanced π–π van der Waals interactions chain moieties, respectively. Supporting information for this article available WWW under...

Abstract A variety of functional nanostructured organic/inorganic hybrid materials from the europium‐exchanged derivative a Preyssler‐type polyoxometalate (POM), [EuP 5 W 30 O 110 ] 12− , and organic surfactants were prepared by ionic self‐assembly (ISA) route. The effect on structure, photoluminescent, electrochemical electrochromic properties POM anions was investigated in detail. All obtained are amphotropic, i.e., exhibit both thermotropic lyotropic liquid‐crystalline phase behaviour....

Molecular recognition and electrostatic interaction of oppositely charged polyelectrolytes are combined in the fabrication ultrathin metallosupramolecular multilayers [shown schematically picture, PEI=polyethyleneimine, PSS=poly(styrene sulfonate)]. The layers between PSS composed an iron(II) bis(terpyridine) coordination polymer.

Ultrathin multilayer films of a novel molybdenum(VI) polyoxometalate cluster ((NH4)21[H3Mo57V6(NO)6O183(H2O)18]) (Mo57) and poly(allylamine hydrochloride) (PAH) have been prepared by the consecutive stepwise adsorption Mo57 PAH from dilute aqueous solution. The Mo57/PAH characterized optical spectroscopy small-angle X-ray reflectivity (XR) methods. UV−vis measurements reveal regular film growth with each adsorption. average surface density was found to be (1.4 ± 0.4) × 1013 clusters per cm2,...

Self-assembly of a fullerene derivative with long alkyl chains in different solvents results the formation hierarchically-ordered supramolecular assemblies well-defined 1, 2 and 3D architectures such as vesicles, fibers, discs cones, whose fundamental structural sub-unit consists bilayers.

Molecular or supramolecular systems capable of electro- and photostimulated color changes are still rare. We present a device design based on an electrostatic complex nanoscopic polyoxometalate cluster polyelectrolyte. The coating reversibly from transparent to blue by photo- and/or electroinduced stimulation. choice the components results in perfect transparency over entire visible range, large optical response, reversible operation, excellent stability.

A detailed analysis of the supramolecular architecture nanoporous surfactant-encapsulated cluster (SEC) with empirical formula (DODA)40(NH4)2[(H2O)n ⊂ Mo132O372(CH3CO2)30(H2O)72] 1 (n ≈ 50) is presented. The open framework Keplerate investigated by means small angle neutron scattering (SANS) in CDCl3 solutions containing discrete SECs. simplifying core–shell model developed, which describes SEC as a solvent-filled nanocavity, surrounded two concentric shells (a first polyoxometalate shell...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThin Films of (3-Aminopropyl)triethoxysilane on Aluminum Oxide and Gold SubstratesDirk G. Kurth Thomas BeinCite this: Langmuir 1995, 11, 8, 3061–3067Publication Date (Print):August 1, 1995Publication History Published online1 May 2002Published inissue 1 August 1995https://pubs.acs.org/doi/10.1021/la00008a035https://doi.org/10.1021/la00008a035research-articleACS PublicationsRequest reuse permissionsArticle Views2322Altmetric-Citations115LEARN ABOUT...

Hierarchical supramolecular assemblies of micrometer-sized flower-shaped objects (see image) are constructed by transformation an interdigitated bilayer precursor composed a fullerene derivative bearing three long aliphatic chains. Intermediate transforming structures provide evidence for the formation mechanism objects. Supporting information this article is available on WWW under http://www.wiley-vch.de/contents/jc_2296/2007/z700647_s.pdf or from author. Please note: The publisher not...

We investigate the making of semiconductor nanorods using well-defined molecular templates. The films are characterized by AFM and XPS. spin-coated monolayer arachidic acid assembles on graphite as 1D nanostripes with bilayer periodicity. copper arachidate film shows curved stripes, which become straight after reacting hydrogen sulfide. new template scheme may facilitate fabrication nanorod arrays a variety inorganic semiconducting materials.

A phase transition in an amphiphilic mesophase is explored to deliberately induce mechanical strain assembly of tightly coupled metal ion coordination centers. Melting the alkyl chains causes distortion geometry around central ion. As a result, crystal field splitting d-orbital subsets decreases resulting spin from low-spin high-spin state. The diamagnetic-paramagnetic reversible. This concept demonstrated metallo-supramolecular polyelectrolyte-amphiphile complex self-assembled ditopic...

Strata pack: Electroactive cytochrome c multilayer assemblies were constructed within a polyelectrolyte network on gold electrode. Up to 15 layers electroactive, with linear increase in redoxactive protein per layer. Evidence for protein–protein electron transfer through the assembly was found (pathway marked by arrows picture). Supporting information this article is available WWW under http://www.wiley-vch.de/contents/jc_2002/2004/z52804_s.pdf or from author. Please note: The publisher not...

Fullerene derivatives bearing long alkyl chains epitaxially adsorb on the basal plane of graphite forming well-ordered one-dimensional lamellae. Within lamellae, C60 moieties are organized in a zigzag-type fashion. The ordering is mainly governed by substitution pattern and chain length chains. electrochemical activity groups fully maintained surface-confined assemblies.

Fullerene flakes: A diacetylene-functionalized fullerene derivative self-organizes into flakelike microparticles (see picture). Both the diacetylene and C(60) moieties can be effectively cross-linked, which leads to supramolecular materials with remarkable resistivity solvent, heat, mechanical stress. Moreover, surface of cross-linked objects is highly durable water-repellent.