Light-triggered polymerase chain reaction
Photochemical control of the polymerase chain reaction has been achieved through the incorporation of light-triggered nucleotides into DNA.
Materials Literature
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Facile Synthesis of BiCuOS by Hydrothermal Methods
BiCuOS, which is isostructural to the layered rare-earth oxysulfides LnCuOS (Ln = La-Eu), was synthesized by a single-step hydrothermal reaction at low temperature (250 degrees C) and pressure (<20 atm). Particular emphasis is placed on how the selection of the proper reaction conditions, such as temperature and pH, a…
Adsorption, desorption, and diffusion of nitrogen in a model nanoporous material. I. Surface limited desorption kinetics in amorphous solid water
The adsorption and desorption kinetics of N2 on porous amorphous solid water (ASW) films were studied using molecular beam techniques, temperature programed desorption (TPD), and reflection-absorption infrared spectroscopy. The ASW films were grown on Pt(111) at 23 K by ballistic deposition from a collimated H2O beam…
Monitoring the prevention of amyloid fibril formation by α‐crystallin
The molecular chaperone, alpha-crystallin, has the ability to prevent the fibrillar aggregation of proteins implicated in human diseases, for example, amyloid beta peptide and alpha-synuclein. In this study, we examine, in detail, two aspects of alpha-crystallin's fibril-suppressing ability: (a) its temperature depend…
Liquid‐Crystalline Rigid‐Core Semiconductor Oligothiophenes: Influence of Molecular Structure on Phase Behaviour and Thin‐Film Properties
The design, synthesis and properties of liquid-crystalline semiconducting oligothiophenes containing dithienothiophene (DTT), benzothiadiazole (BTZ) and carbazole (CBZ) rigid cores are described. The effect of molecular structure (shape, size and substitution) on their thermal behaviour and electrical properties has b…
Dinuclear Transition-Metal Terpyridine Complexes with a Dithienylcyclo- pentene Bridge Directed toward Molecular Electronic Applications
A series of dinuclear metal terpyridine (M-tpy; M = Ru, Os, Fe, and Co) complexes with a photochromic dithienylethene bridge were designed and synthesized through either a convergent or a divergent approach. The open forms of the complexes containing RuII and FeII centers were found to be inert to ultraviolet photoirr…
An Effective Hydrothermal Route for the Synthesis of Multiple PDDA-Protected Noble-Metal Nanostructures
In this article, we demonstrate an effective hydrothermal route for the synthesis of multiple PDDA-protected (PDDA = poly(diallyl dimethylammonium) chloride) noble-metal (including silver, platinum, palladium, and gold) nanostructures in the absence of any seeds and surfactants, in which PDDA, an ordinary and water-so…
Syntheses, Structures, and Sensitized Lanthanide Luminescence by Pt → Ln (Ln = Eu, Nd, Yb) Energy Transfer for Heteronuclear PtLn2 and Pt2Ln4 Complexes with a Terpyridyl-Functionalized Alkynyl Ligand
Reaction of Pt(dppm-P,P')Cl2 (dppm = 1,2-bis(diphenylphosphino)methane) with HCCPhtpy (HCCPhtpy = 4'-(4-ethynylphenyl)-2,2':6',2"-terpyridine) in the presence of copper(I) iodide and diisopropylamine induced isolation of mononuclear complex cis-Pt(dppm-P,P')(C[triple bond]CPhtpy)2 (1), which can be converted into face…
Large Magnetic Anisotropy in Pentacoordinate NiII Complexes
Pentacoordinate complexes in which Ni(II) is chelated by the tridentate macrocyclic ligand 1,4,7-triisopropyl-1,4,7-triazacyclononane (iPrtacn) of formula [Ni(iPrtacn)X(2)] (X=Cl, Br, NCS) have relatively large magnetic anisotropies, revealed by the large zero-field splitting (zfs) axial parameters |D| of around 15 cm…
Quantum Dot Bioconjugation during Core–Shell Synthesis
One small step: A facile and robust one-step method for creating stable, water-soluble quantum dot (QD)–biomolecule conjugates is described. DNA molecules can be readily attached to QDs during core–shell synthesis (see picture of DNA functionalization of a CdSe@ZnS core–shell QD).
Quantitative Three-Dimensional Reconstruction of Catalyst Particles for Bamboo-like Carbon Nanotubes
The three-dimensional (3D) structure and chemical composition of bamboo-like carbon nanotubes including the catalyst particles that are used during their growth are studied by discrete electron tomography in combination with energy-filtered transmission electron microscopy. It is found that cavities are present in the…
The surface modification of nanosilica, preparation of nanosilica/acrylic core‐shell composite latex, and its application in toughening PVC matrix
Abstract The properties and morphology of nanosilica modified with silane coupling agent, methacryloxypropyltrimethoxysilane (MPS), were characterized by fourier transform infrared, zeta potentials, thermogravimetric analysis, and transmission electron microscopy. The results showed that the grafting ratio of MPS on t…
Faceting ionic shells into icosahedra via electrostatics
Shells of various viruses and other closed packed structures with spherical topology exhibit icosahedral symmetry because the surface of a sphere cannot be tiled without defects, and icosahedral symmetry yields the most symmetric configuration with the minimum number of defects. Icosahedral symmetry is different from…
DNA-Passivated CdS Nanocrystals: Luminescence, Bioimaging, and Toxicity Profiles
A class of luminescent semiconductor quantum dots is described that exhibit low cellular toxicity without the use of bulky surface coatings. Nucleic acids, either in the form of mononucleotides or DNA oligonucleotides, are used as a ligand system in the aqueous synthesis of CdS nanocrystals. The materials produced exh…
Transparent ZnO-TFT Arrays Fabricated by Atomic Layer Deposition
Transparent ZnO thin film transistor ͑TFT͒ array of 176 ϫ 144 ͑106 dpi͒ was fabricated on glass substrate.The V th of the TFT with inverted coplanar structure is about 0.8 V and the mobility is 1.13 cm 2 /V s.The active layer ͑ZnO͒, gate insulator ͑Al 2 O 3 ͒, and source-drain electrode ͑ZnO:Al͒ were deposited by atom…
Human-related application and nanotoxicology of inorganic particles: complementary aspects
In this highlight, the emerging new discipline of nanotoxicology is discussed in terms of nanomedicine, nanocosmetics, and nanofood. In particular, a wide variety of applications of inorganic layered double hydroxide (LDH) nanoparticles in multidisciplinary fields and their potential toxicity compared to that of other…
A methodology for curve‐fitting of the XPS Si 2p core level from thin siloxane coatings
Abstract Plasma‐enhanced coating processes are recognised as a route to well‐adhered, conformal coatings, and are often used as a means of modifying the surface properties of materials, while having a minimal effect on the bulk characteristics of the substrate. Here, a method for providing an understanding of the chem…
Random-phase-approximation-based correlation energy functionals: Benchmark results for atoms
The random phase approximation for the correlation energy functional of the density functional theory has recently attracted renewed interest. Formulated in terms of the Kohn-Sham orbitals and eigenvalues, it promises to resolve some of the fundamental limitations of the local density and generalized gradient approxim…
Inorganic Nanotubes as Nanoreactors: The First MoS2 Nanopods
MoS2 nanopods, spherical MoS2 nanoparticles grow in a confined geometry of MoS2 nanotube reactors, which subsequently serve as nanocontainers and enable safe handling and simple release of the particles on stimulation.
Stimuli‐Responsive Reversible Transport of Nanoparticles Across Water/Oil Interfaces
To cap it all: With the aid of stimuli-responsive polymer capping, gold nanoparticles (Au-NPs) can be highly colloidally stable in both aqueous and organic media. They spontaneously and reversibly cross water/oil interfaces in both directions upon formation of a biphasic salty water–oil system (see picture).