Materials Literature
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A model, well-dispersed nanocomposite of surface-modified cadmium selenide (CdSe) nanoparticles (average core diameter of 3.5 nm) blended into polystyrene is prepared such that entropic forces drive the failure mechanism of the nanocomposite. At an optimal volume fraction (∼0.7%) of nanoparticles, the failure strain o…
Boron-doped 12 C-enriched diamond single crystals (about 3 mm; 99.97% 12 C) were successfully synthesized at 6.1 GPa and 1430 °C by the high-pressure and high-temperature method using a starting mixture of boron powder and 12 C-enriched pyrolytic carbon powder. The thermal conductivities of these crystals were determi…
Room temperature single crystal electron paramagnetic resonance (EPR) studies have been carried out on VO(II) doped diaquamalonatozinc(II) at X-band frequencies. The analysis of the data suggests the position of the vanadyl ion is substitutional replacing zinc ion. The spin Hamiltonian parameters g xx =1.998, g yy = 1…
A poly(methyl acrylic acid)/expanded graphite (PMAA/EG) conductive nanocomposite was prepared by means of in situ intercalation polymerization using expanded graphite (EG) as conductive fillers and acrylic acid (MAA) as a monomer. The electrical resistance response of the model material was investigated upon exposure…
A homojunction of single-crystalline β-Ga 2 O 3 nanowires and nanocrystals was realized. Ga 2 O 3 nanowires were synthesized at about 850–950 °C using a mixture of Ga 2 O 3 and graphite powder with vapor phase epitaxy. It was found that the β-Ga 2 O 3 nanocrystals form a single unit with the nanowires and are part of…
Two-dimensional (2-D) gold networks were spontaneously formed at the air−water interface after HAuCl 4 reacted with fructose at 90 °C in a sealed vessel, in a reaction in which fructose acted as both a reducing and a protecting agent. Through fine-tuning of the molar ratio of HAuCl 4 to fructose, the thus-formed 2-D g…
Single molecule-single nanoparticle surface enhanced Raman scattering event is analyzed using a quantum mechanical approach, resulting in an analytical expression for the electromagnetic enhancement factor that succinctly elucidates the fundamental aspects of SERS. The nanoparticle is treated as a dielectric spherical…
Abstract Composites of polyethylene and aluminium (PEAL) may be obtained from the recycling of postconsumed Tetra Pak aseptic packaging. The components of the composite are low density polyethylene (LDPE), aluminium and an ethylene‐methacrylic acid random copolymer (EMAA). The presence of metallic filler and a functio…
The cellular level of the Escherichia coli heat-shock sigma factor RpoH (sigma32) is negatively controlled by chaperone-mediated proteolysis through the essential metalloprotease FtsH. Point mutations in the highly conserved region 2.1 stabilize RpoH in vivo. To assess the importance of this turnover element, hybrid p…
Spin degrees of freedom of charged nitrogen-vacancy $({\mathrm{NV}}^{\ensuremath{-}})$ centers in diamond have large decoherence times even at room temperature, can be initialized and read out using optical fields, and are therefore a promising candidate for solid-state qubits. Recently, quantum manipulations of ${\ma…
Cellulose-based electro-active paper (EAPap) has been reported as a smart material that has merits in terms of light weight, dry condition, biodegradability, large displacement output and low actuation voltage. However, it requires high humidity. This paper introduces an EAPap that can be actuated in low humidity cond…
The magnetic properties of a series of three neutral radical organometallic complexes of general formula [CpNi(dithiolene)]. have been investigated by a combination of X-ray crystal structure analysis and magnetic susceptibility measurements, while the assignment of the exchange coupling constants to the possible exch…
We present measurements of fluorescence intensity trajectories and associated excited-state decay times from individual CdSe/oligo(phenylene vinylene) (CdSe-OPV) quantum dot nanostructures using time-tagged, time-resolved (TTTR) photon counting techniques. We find that fluorescence decay times for the quantum dot emit…
Earlier stages of aniline polymerization have been studied by Fourier transform electrochemical impedance spectroscopy (FTEIS) experiments. Initial oxidation of aniline leads to the formation of a thin layer passivating the electrode surface, which is depassivated upon a further increase in potential and mediates a fu…
The complex between Eu(III) and 1,7-diaza-4,10,13-trioxacyclopentadecane-N,N'-diacetic acid (L4) was characterized by pH potentiometric titration and 1H NMR spectroscopy. The conversion of the monomer to a dimeric complex is observed as the pH is increased from 7 to 10 in a reaction that releases one mol/HO- per dimer…
Abstract Vapor deposition method was used to obtain nanocrystals of N ‐(3,5‐di‐ tert ‐butylsalicylidene)‐4‐ aminopyridine ( 1 ) and N ‐(3,5‐di‐ tert ‐butylsalicylidene)‐4‐iodoaniline ( 2 ), and nanoscale thin layers (65 nm thick) of cis ‐1,2‐dicyano‐1,2‐bis(2,4,5‐trimethyl‐3‐thienyl)ethene ( 3 ). Compound 3 was also d…
Dielectric measurements were carried out for mixtures of Triton X-100 (TX, a nonionic detergent with a poly(ethylene oxide) chain) and water with or without electrolytes over a frequency range of 1 MHz to 10 GHz to study the structure and dynamics of water molecules in the mixtures. Dielectric relaxation was found abo…
Carbon nanocoils and nanofibers with novel morphologies and potential new properties were prepared from controlled delivery of acetylene. Branched carbon nanocoils were produced from continuous acetylene flow. Pulsed delivery of acetylene produced branched carbon nanofibers with even-length subunits. Interrupted acety…
Scanning electron microscopy combined with energy-dispersive X-ray spectrometry is particularly suited to characterizing morphology and elemental composition of individual microparticles. Although not straightforward, quantitative X-ray microanalysis of low-Z-containing particles is achievable using atmospheric thin-w…
An environmentally benign transparent photochromic film, 1,3-dihydro-1,3,3-trimethylspiro[2H-indole-2,3'-[3H]-naphtho[2,1-b][1,4]oxazine] (SPO) /gamma-cyclodextrin (gamma-CD), was prepared using the cast-coating method, and the nanocavity effect of gamma-CD on the photochromism of SPO was studied. The film mainly cons…