Subcomponent self-assembly generates dynamic combinatorial libraries of Zn₄L₆ cages whose composition is strongly affected by catenation and encapsulation.

We report long-lived, highly spatially localized plasmon states on the surface of nanoporous gold nanoparticles—nanosponges—with high excitation efficiency. It is well known that disorder nanometer scale, particularly in two-dimensional systems, can lead to localization and large field enhancements, which can, turn, be used enhance nonlinear optical effects study exploit quantum processes. Here, we introduce promising, three-dimensional model systems for light capture as nanosponges are...

We introduce zinc oxide (ZnO) functionalized porous gold nanoparticles that exhibit strong second harmonic (SH) emission due to an efficient coupling of localized surface plasmons ZnO excitons. The nanosponges are perforated with a random network 10 nm sized ligaments, localizing in high density hot spots. use broadband, few-cycle ultrafast laser probe coherent nonlinear from individual bare and ZnO-functionalized sponges. While the third spectrum hybrid particles redshifts respect sponges,...

Porous nanosponges, percolated with a three-dimensional network of 10 nm sized ligaments, recently emerged as promising substrates for plasmon-enhanced spectroscopy and (photo)catalysis. Experimental theoretical work suggests surface plasmon localization in some hot-spot modes the physical origin their unusual optical properties, but so far existence such hot-spots has not been proven. Here we use scattering-type scanning near-field nanospectroscopy on individual gold nanosponges to reveal...

A novel photoswitchable rotaxane was synthesised and its switching behaviour in solution analysed with NMR UV-Vis. monolayer of rotaxanes deposited on glass surfaces the on-surface photoswitching investigated. Angle-resolved NEXAFS spectra revealed a preferential orientation that reversibly changes upon switching.

Electronic and vibrational properties of the two stable molecular configurations Sn–phthalocyanine adsorbed on an ultrathin buffer film Ag(111) have been investigated with scanning tunneling microscopy density functional calculations. Complex submolecular patterns are experimentally observed in unoccupied states images. The calculations show that they result from a superposition Sn p orbitals. Furthermore, characteristic features spectra differential conductance reproduced by together...

The mechanism of attachment nanocrystals (NCs) to curved carbonaceous species such as graphene nanoribbons and carbon nanotubes (CNTs) is current scientific interest. In addition, we have observed anisotropic growth patterns titania NCs from materials, for which there no theoretical explanation. this work, use density functional theory (DFT) calculations calculating the energy adsorption nanostructures both armchair metallic zigzag semiconducting single-walled (SWCNTs) in their pure...

The photoinduced pseudorotaxane formation between a photoresponsive axle and tetralactam macrocycle was investigated in solution on glass surfaces with immobilized multilayers of macrocycles. In the course this reaction, novel photoswitchable binding station azobenzene as unit diketopiperazine synthesized studied by NMR UV/Vis spectroscopy. Glass have been functionalized pyridine-terminated SAMs subsequently macrocycles through layer-by-layer self assembly. A preferred orientation could be...

Abstract Purpose To develop a customized method to produce uniform phantoms for task‐based assessment of CT image quality. Methods Contrasts between polymethyl methacrylate (PMMA) and fructose solutions different concentrations (240, 250, 260, 280, 290, 300, 310, 320, 330, 340 mg/mL) were calculated. A phantom was produced by laser cutting PMMA slabs the shape patient’s neck. An opening 10 mm diameter cut into left parapharyngeal space. angioplasty balloon inserted filled with simulate...

Abstract The potential of disorder to confine and enhance electromagnetic fields is well known localized in turn can be used for non‐linear optical sensing studying quantum optics. Recently, nanoporous gold nanoparticles (nanosponges) were shown support highly long‐lived plasmonic modes the infrared spectral range. In this paper, we take first steps towards tailoring optimal field localization enhancement by calculating extinction near‐field properties different filling fractions correlation...

The purpose of our study is to develop and evaluate a method for radiopaque 3-D printing (R3P) soft tissue computed tomography (CT) phantoms with office laser printers. Five printers from different vendors are tested toner CT attenuation. A liver phantom created by images patient on paper. One thousand eight hundred sixty paper sheets printed three repeated prints per page, resulting in stack 18.6 cm. examined 12 tube current settings. Images reconstructed using filtered back projection...

Abstract. Most plant-available Si in strongly desilicated soils is provided through litter decomposition and subsequent phytolith dissolution. The importance of silicon (Si) cycling tropical soil–plant systems raised the question whether oil-palm (Elaeis guineensis Jacq.) cultivation alters cycling. As oil palms are considered hyper-accumulators, we hypothesized that much stored above-ground biomass with time. Furthermore, system might lose considerable amounts every year fruit-bunch...

The complex dielectric function of hexagonal gallium nitride (α-GaN) is obtained from a numerical solution the excitonic Schrödinger equation taking into account full 6 × valence-band structure. parametrization includes anisotropy, nonparabolicity, and coupling angular-momentum eigenstates. Spectra eigenfunctions are time-dependent initial-value problem, which solved via an exponential split-operator method. In particular, we calculate reflectivity a-plane GaN with polarization vectors...

Abstract. Silicon (Si) is known to have multiple beneficial effects on crops. Most plant-available Si in soils provided through litter decomposition and subsequent phytolith dissolution, especially strongly desilicated tropical soils. The importance of cycling soil-plant systems raised the question if oil-palm cultivation, oil palm being a Si-accumulating crop, alters cycling. As accumulates plant tissue, we hypothesized that i) stored aboveground biomass palms with time, ii) system might...