Materials Literature
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We report on the spectral dependence of the SERS amplification in randomly distributed gold nanoparticle arrays grown by electron beam evaporation, covered with a thin shell of SiO 2 .Experiments carried out with six different laser lines highlight a remarkable red-shift between the optimal excitation wavelength (785…
Despite huge efforts to decipher the anatomy, composition and function of the brain, it remains the least understood organ of the human body. To gain a deeper comprehension of the neural system scientists aim to simplistically reconstruct the tissue by assembling it in vitro from basic building blocks using a tissue e…
With the applications of magnetic resonance imaging (MRI) at higher magnetic fields increasing, there is demand for MRI contrast agents with improved relaxivity at higher magnetic fields. Macromolecule-based contrast agents, such as protein-based ones, are known to yield significantly higher r1 relaxivity at low field…
The combination of photoemission spectroscopies, infrared and UV-VIS absorption, and electric measurements has allowed to clarify the mechanisms governing the conductivity and the electronic properties of Al-doped ZnO (AZO) films in a wide doping range. The contribution of defect-related in-gap states to conduction ha…
Magnesium is a promising hydrogen storage material with high capacity and low cost, but suffers from sluggish kinetics of hydrogen sorption. Carbon nanotubes (CNTs) are efficient in improving the sorption performance of Mg; however, proper understanding of the roles of CNTs is still required. Here, a simple and fast c…
Electron tomography in combination with electron energy-loss spectroscopy (EELS) experiments and simulations was used to unravel the interplay between structure and plasmonic properties of a silver nanocuboid dimer. The precise 3D geometry of the particles fabricated by means of electron beam lithography was reconstru…
Abstract Aberration‐corrected (AC) STEM, AC TEM and in situ X‐ray absorption fine structure spectroscopy (XAFS) were used to characterize the Pt clusters present on a 0.35 wt % Pt on γ‐alumina support after reduction in hydrogen at 700 °C. STEM high‐angle annular dark field imaging shows that cluster formation takes p…
Mesoporous silica particles (MSPs) have attracted increasing interest as supports in the design of controlled delivery materials. Besides their excellent properties as loading supports (that is, large surface area and pore volume), the modification of their external surface with molecular/supramolecular ensembles allo…
A novel hydrothermal approach to synthesize fluorescent carbon nitride dots derived from ionic liquids has been reported. In comparison with previous methods, this method bears several unique merits, such as being clean, cheap, convenient and having a potential to advance large-scale industrialization.
Eutectic melting, reactive hydride composites, and nanoconfinement have the potential to improve the reversible hydrogen storage properties in metal borohydrides. We study and compare the combined effect of all three methods on reversible hydrogen release and uptake of the eutectic melting lithium potassium borohydrid…
SERS efficiencies of micrometric polystyrene beads coated with gold and silver nanoparticles: the effect of nanoparticle size, Mir-Simon, Bernat, Morla-Folch, Judit, Gisbert-Quilis, Patricia, Pazos-Perez, Nicolas, Xie, Hai-nan, Bastús, Neus G, Puntes, Víctor, Alvarez-Puebla, Ramon A, Guerrini, Luca
Multicolor electrochromic systems based on heat cross-linkable arylamine-substituted fluorene derivatives, FD and FDOMe, are reported. These derivatives with pendant vinyl groups have been synthesized by the Buchwald-Hartwig amination reaction and were well-characterized using various analytical and spectroscopic tech…
We reveal the thickness effects on optical properties for nanoparticles in the shape of hollow spheres theoretically and experimentally. Within and beyond the electrically small limit, hollow spheres are shown to have almost the same light absorption power as that of solid ones, when the ratio of inner core to whole p…
The bronze polymorph of titanium dioxide, known as TiO 2 (B), has promising photochemical and electronic properties for potential applications in Li-ion batteries, photocatalysis, chemical sensing, and solar cells. In contrast to previous studies performed with powder samples, which often suffer from impurities and la…
Extinction spectra of single gold nanorods optically trapped in water were measured by spatial modulation spectroscopy. Comparison of the extinction cross sections and resonance frequencies to finite element calculations allows us to determine the dimensions of the nanorod and estimate the contribution of radiation da…
Gold is one of the most widely used metals for building up plasmonic devices.Although slightly less efficient than silver for producing sharp resonance, its chemical properties make it one of the best choices for designing sensors.Sticking gold on a silicate glass substrate requires an adhesion layer, whose effect has…
A magneto-metasurface is demonstrated for one-way transmission of terahertz (THz) waves and magnetic field sensing. Due to the magneto-optical effect and the asymmetric structure of the transmission system, magnetoplasmon mode splitting for forward and backward THz waves and one-way transmission has been observed in t…
We perform molecular dynamics simulations for viscous liquids to study the relations between dynamical heterogeneity, structural (α) relaxation, and self-diffusion. For atomistic models of supercooled water, polymer melts, and an ionic liquid, we characterize the space-time characteristics of dynamical heterogeneity b…
BACKGROUND: The RCSB Protein Data Bank (PDB) provides public access to experimentally determined 3D-structures of biological macromolecules (proteins, peptides and nucleic acids). While various tools are available to explore the PDB, options to access the global structural diversity of the entire PDB and to perceive r…
A polymer brush surface with autonomous function has been designed by using a self-oscillating polymer that we developed. The self-oscillation is induced by chemomechanical energy conversion from an oscillating chemical reaction (the Belousov–Zhabotinsky (BZ) reaction) to conformational changes of polymer chains. In t…