Materials Literature
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In this work, we present a novel platform to synthesize polymeric “raspberry” particles and explore their use to fabricate surfaces with low wettability and high water adhesion, resembling the properties of naturally occurring surfaces such as the rose petal. The raspberry particles were obtained by layer-by-layer sel…
Surface enhanced Raman scattering (SERS) mapping of biomarkers has shown great promise in determining the distribution of proteins of interest in cells and tissues. Metallic nanoparticle (NP) probes are generally used in such mapping. Since SERS intensities from NPs are dependent on size, shape, and interparticle dist…
A family of triphosphine gold–copper clusters bearing aliphatic and hydroxyaliphatic alkynyl ligands of general formula [HC(PPh 2 ) 3 Au 3 Cu(C 2 R) 3 ] + (R = cyclohexyl ( 1 ), cyclopentyl ( 2 ), Bu t ( 3 ), cyclohexanolyl ( 4 ), cyclopentanolyl ( 5 ), 2,6-dimethylheptanolyl ( 6 ), 2-methylbutanolyl ( 7 ), diphenylme…
The uranyl aryloxide [UO2(OAr)2(THF)2] (Ar = 2,6-(t)Bu2-C6H2) is an active catalyst for the ring-opening cyclo-oligomerization of ε-caprolactone and δ-valerolactone but not for β-butyrolactone, γ-butyrolactone, and rac-lactide. (1)H EXSY measurements give the thermodynamic parameters for exchange of monomer and coordi…
We have developed an efficient scheme for the generation of accurate repulsive potentials for self-consistent charge density-functional-based tight-binding calculations, which involves energy-volume scans of bulk polymorphs with different coordination numbers. The scheme was used to generate an optimized parameter set…
Synthesis of nanoparticle dimers made of asymmetric compositions is very challenging because of the difficulty in manipulating the nanoparticles' surface chemistries in order to control the assembly and/or growth of different nanoparticles. In this Letter, we report a seed-mediated, surface-confined epitaxial overgrow…
A comparative study of the structure and transport properties of porous aluminum oxide films obtained by single- and two-step anodization was carried out. It is shown that the oxidation regime significantly affect the number of dead-ended channels, which results in more than twice the variation in membrane permeabilit…
Alkaline-earth elements isovalently substituted into a [Bi2AE2O4][CoO2]y (AE2 = Ca2, Sr2, and CaSr) single crystal with a layered structure were grown by the optical floating zone method. Structural characterization by X-ray diffraction and electron microscopy showed that the layers were oriented perpendicular to the…
From particles to fibers: Nanofibers with different morphologies and periodicities can be fabricated by supraparticular assembly of magnetic spherical nanoparticles. A linear sintering process is used to merge the assembled colloids together. The structure of the obtained fibers is controlled by the process parameters…
Described here is a planar top-down method for the fabrication of precisely positioned very narrow (sub-10 nm), high aspect ratio (>2000) graphene nanoribbons (GNRs) from graphene sheets, which we call meniscus-mask lithography (MML). The method does not require demanding high-resolution lithography tools. The mechani…
A new mononuclear dysprosium(III)-cucurbit[6]uril complex has been synthesized and characterized structurally and magnetically. It exhibits single-ion magnet (SIM) behavior with two slow magnetic relaxation processes, which are very sensitive to the solvation degree of the sample. Depending on the amount and type of t…
BACKGROUND: Recent studies suggest that carboplatin with pegylated liposomal doxorubicin (C+PLD) is as efficacious as carboplatin with paclitaxel (C+P) and possibly is more tolerable for ovarian cancer therapy. Pegylated liposomal doxorubicin (PLD) may also be efficacious and tolerable as monotherapy in recurrent or p…
BACKGROUND: Ralstonia eutropha H16 is well known to produce polyhydroxyalkanoates (PHAs), which are potential bio-based biodegradable plastics, in an efficient manner as an energy storage material under unbalanced growth conditions. To obtain further knowledge of PHA biosynthesis, this study performed a quantitative t…
We describe the formation of superconducting states in graphene in the presence of pseudo-Landau-levels induced by strain, when time reversal symmetry is preserved. We show that superconductivity in strained graphene is quantum critical when the pseudo-Landau-levels are completely filled, whereas at partial fillings s…
Heavily erbium-doped low-hydroxyl fluorotellurite glasses with molar compositions of (85.7-x)TeO2 + xBaF(2) + 4.8Na(2)CO(3) + 9.5Er(2)O(3) (x = 38.1, 28.6, 19) were fabricated. The maximum doping concentration of erbium ions was up to 19 mol % by introducing BaF2 into the tellurite glass system. Under 980 nm excitatio…
Kelvin probe microscopy in ultrahigh vacuum is used to image the local electrostatic potential fluctuations above hexagonal boron nitride (h-BN) and SiO2, common substrates for graphene. Results are compared to a model of randomly distributed charges in a two-dimensional (2D) plane. For SiO2, the results are well mode…
As more and more nanomaterials with novel physicochemical properties or new functions are created and used in different research fields and industrial sectors, the scientific and public concerns about their toxic effects on human health and the environment are also growing quickly. In the past decade, the study of the…
We summarize the catalytic synthesis of multiwall carbon nanotubes (MWCNTs). The current understanding of the reaction mechanism is presented, in particular the catalyst design for the CCVD process is analyzed. To complement that, kinetics and reaction engineering aspects are discussed along with the impact of the rea…
Abstract It is well known that tetra hydroxymethyl phosphonium sulfate (THPS) is commonly used in oil fields as a biocide for sulfate‐reducing bacteria (SRB), but it has low corrosion inhibition. In this study, four phosphonium surfactant compounds were synthesized via a coupling reaction between THPS and different fa…
Up-conversion emission spectra of Er(3+) singly and Er(3+)/Yb(3+) co-doped CaIn(2)O(4) were investigated under a 980 nm diode laser excitation. Double intense UC emission bands in green and red region are observed in Er(3+)/Yb(3+) co-doped CaIn(2)O(4), resulting in the tunable ratio of red to green and the chromaticit…