Materials Literature
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At last meeting, we reported a new type of surface-enhanced Raman Spectroscopy (SERS) substrates based on metal (Au or Ag) coated Si nanocones fabricated by a Bosch etching process. The substrate showed reliable SERS performance with an analytical enhancement factor greater than 6 × 10<sup>7</sup> for trans-1,2-…
The high level of accumulated expertise by ULIS and CEA/LETI on uncooled microbolometers made from amorphous silicon enables ULIS to develop VGA IRFPA formats with 17μm pixel-pitch to build up the currently available product catalog. This detector keeps all the innovations developed on the 25 μm pixel-pitch…
The book serves as educational material for students studying the subjects of building materials, construction material, materials science, building materials and items, ceramic materials, concrete and mortar technology, architectural material science. It contains basic theoretical material connected with different ki…
Using linear-response density-functional theory, we obtain the magnetic interactions in several iron pnictides. The ground state has been found to be non-collinear in FeSe, with a large continuum of nearly degenerate states lying very close to the magnetic 'striped' structure. The presence of non-collinearity also see…
This work addresses the advantages of the ultrasound stimulation method over the conventional heating method for the preparation of nanosized γ-Al 2 O 3 . The γ-Al 2 O 3 obtained by calcination of boehmite at 600 °C is derived from the inexpensive aluminum chloride salt by the precipitation route. Thermal evolution, p…
The same poly(oxyalkylene)−amidoacids (POA−amidoacid) were incorporated into two different types of ionic clays, anionic layered-double-hydroxides (Mg−Al LDH), and cationic montmorillonite (MMT). Conventionally, the intercalation is an ionic exchange reaction, i.e. anionic organic salts for LDH and cationic salts for…
Abstract The synthesis and optical properties of a highly soluble (>200 mg mL −1 ) and highly fluorescent ( Φ F in film = 0.64) 1,2,4‐linking hyperbranched poly(arylenevinylene) (1,2,4‐ hb ‐PAV) prepared via Wittig reaction of A 3 (biphenyl‐tricarbaldehyde) and B 2 (phosphonium salt) monomers is reported. The molec…
A Cu2+-doped 2, 4-dichlorophenol (2, 4-DCP) molecularly imprinted TiO2–SiO2 nanocomposite catalyst was prepared by molecular imprinting technique in combination with sol–gel methods. The prepared material was characterised by X-ray diffraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), tran…
Protonex is a leading provider of advanced fuel cell power systems for portable, remote and mobile applications. Protonex has been working on optimizing longer endurance of PEM fuel cell systems for applications such as small UAVs and UGVs. These applications require power systems with high specific energy (Wh/kg). Wi…
In this study, in situ surface-enhanced Raman scattering (SERS) decoding was demonstrated in microfluidic chips using novel thin micro gold shells modified with Raman tags. The micro gold shells were fabricated using electroless gold plating on PMMA beads with diameter of 15 microm. These shells were sophisticatedly o…
Angle dispersive X-ray diffraction and Raman scattering studies have been carried out on Sr2MgWO6 up to ∼28 and ∼40 GPa, respectively. This compound is found to be structurally stable up to the highest pressure in this study. Bulk modulus of ambient phase is determined to be 128 ± 3.9 GPa which is in close agreement w…
The tetrabutylammonium (TBA(+)) salts of square-planar monoanionic gold complexes of the unsymmetrically substituted Ar,H-edt(2-) 1,2-dithiolene ligands (Ar,H-edt(2-)=arylethylene-1,2-dithiolato; Ar=phenyl (1(-)), 2-naphthyl (2(-)), and 1-pyrenyl (3(-))) were synthesized and characterized by spectroscopic and electroc…
Abstract We describe the development of phase morphology in polypropylene (PP)/ethylene–butene copolymer (EBM) blends in both extrusion through dies and in subsequent melt spinning to form filaments. This immiscible blend has a very low interfacial tension around 0.69 dynes/cm. In the die extrusion process, at low ext…
This research was focused on the study of delamination phenomena in metal–polymer laminates used in containers. The selected material was an electrolytic chromium coated steel (ECCS), protected by polyethylene teraphthalate (PET). The study employed an acetic acetate medium, which has been proved to degrade the PET co…
The MONTAGE program sponsored by the Microsystems Technology Office of the Defense Advanced Research Projects Agency (DARPA) resulted in the demonstration of a novel approach to designing compact imaging systems. This approach was enabled by an unusual four-fold annular lens originally designed and demonstrated for op…
Abstract Mixed crystals of ammonium dihydrogen phosphate and potassium dihydrogen phosphate K 1‐ x (NH 4 ) x H 2 PO 4 were grown from aqueous solutions with x = 0.06, 0.09, 0.15, 0.32, 0.42, 0.51, 0.63, 0.70, 0.76, 0.78, 0.84, 0.88, 0.89 and 0.91. The crystal composition that differs from solution was estimated by X‐r…
Single crystals of NdFe 1 − x Co x AsO with x = 0, 0.025, 0.05, 0.075, 0.10 and 0.15 were grown via high pressure synthesis. Structural and elemental analysis showed successful substitution of Co for Fe with no detectable change in the oxygen site occupation. Magnetic, electrical transport and tunnel-diode resonator m…
Self-assembly of peptides and proteins is a key feature of biological functions. Short amphiphilic peptides designed with a beta-sheet structure can form sophisticated nanofiber structures, and the fibers are available as nanomaterials for arranging biomolecules. Peptide FI (H-PKFKIIEFEP-OH) self-assembles into nanofi…
We study the self-assembly of a dendritic macromolecular system formed by a second-generation dendron with pH-responsive end groups and with a polymer chain emanating from its focal point, typically referred to as dendron-coil system. We use supramolecular ionic interactions to attach to the periphery of the dendrons…
We have investigated the electronic, magnetic, and optical properties of two Fe-based superconductors and related parent compounds via three powerful techniques: scanning tunneling microscopy/spectroscopy (STM/S), high-temperature vibrating sample magnetometry, and optical transmission spectroscopy (OTS). Below the su…