Materials Literature
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Redox “B”ees: Rational design of a new series of boron-functionalized NiIII/NiIV–bis(dicarbollide) clusters results in a family of robust and tunable redox shuttles (see diagram; EDG and EWG denote electron-donating and -withdrawing groups, respectively). This offers a means to rationally control the redox properties…
We report the synthesis of nanostructured tungsten trioxide (WO 3 ) films and their electrochromic characteristics. Plate-like monoclinic WO 3 nanostructures were grown directly on fluorine-doped tin oxide glass substrates by a simple and low-cost crystal-seed-assisted hydrothermal method. The growth mechanism of the…
Abstract Surface patterns of nanoshell arrays play an important role in diverse applications including surface‐enhanced Raman scattering (SERS) sensors, lithium‐ion batteries, solar cells, and optical devices. This paper describes an innovative surface nanopatterning technique for realizing large‐scale ordered arrays…
Abstract A red‐fluorescent conjugated polyelectrolyte (CPE, P2 ) is grafted with dense poly(ethylene glycol) (PEG) chains via click chemistry and subsequently modified with folic acid to form a molecular brush based cellular probe ( P4 ). P4 self‐assembles into a core–shell nanostructure in aqueous medium with an aver…
The two-dimensional spin crossover (SCO) polymers [Fe(3-Fpy) 2 M(CN) 4 ] (M II = Ni( 1 ), Pd( 2 ), Pt( 3 )) were nanostructured in the form of nanocrystals and nanoparticles, and their chemical, structural, and physical characterization was carried out using different experimental methods (powder X-ray diffraction, ma…
An investigation of the photoinduced fluorescence enhancement (PFE) behavior of CdSe/ZnS core/shell quantum dots deposited at low densities, under anhydrous and controlled water humidity, under oxygen or argon, is presented. The photoluminescence properties of CdSe/ZnS QDs are highly dependent upon the local gaseous e…
The immense interest in carbon nanomaterials continues to stimulate intense research activities aimed at realizing carbon nanowires, since linear chains of carbon atoms are expected to display novel and technologically relevant optical, electrical and mechanical properties. Although various allotropes of carbon (e.g.,…
We report a Raman scattering investigation of KTa1−xNbxO3 (x=0.35,0.5) thin films deposited on MgO and LaAlO3 as a function of temperature. The observed phase sequence in the range from 90 to 720 K is similar to the structural phase transitions of the end-member material KNbO3. Although similar in the phase sequence,…
South Korean Joint Investigation Group (JIG) [1] presented two "critical scientific evidence" that link the sinking of the South Korean navy corvette Cheonan on March 26, 2010 to the alleged explosion of a North Korean torpedo: the now-infamous "No. 1" blue ink mark on the torpedo, and the electron-dispersive spectros…
Manipulating the topological properties of insulators, encoded in invariants such as the Chern number and its generalizations, is now a major issue for realizing novel charge/spin responses in electron systems. We propose that a simple optical means --subjecting to a driving laser field with circular polarization, can…
We have shown that various porphyrin-containing nanostructures can be easily synthesized by a surfactant-assisted self-assembly (SAS) method, where an oil/aqueous medium is employed. When a chloroform solution of zinc 5,10,15,20-tetra(4-pyridyl)-21H,23H-porphine (ZnTPyP) was added dropwise into cetyltrimethylammonium…
We present the design and synthesis of a new set of poly(ethylene glycol) (PEG)-based ligands appended with multidentate anchoring groups and test their ability to provide colloidal stability to semiconductor quantum dots (QDs) and gold nanoparticles (AuNPs) in extreme buffer conditions. The ligands are made of a PEG…
Theoretical methods have greatly influenced experiment in search of the elusive marriage between semiconductor electronics and magnetism, and the development of spintronics. The path has not always been a straight one, but realizing the limitations and strengths of theoretical approaches promises a straighter course.
A chemo-mechanical method was used to prepare cellulose nanofibrils dispersed uniformly in an organic solvent. Poly(ethylene glycol) (PEG 1000) was added to the matrix as a compatibilizer to improve the interfacial interaction between the hydrophobic poly(lactic acid) (PLA) and the hydrophilic cellulose nanofibrils. o…
We present a study of the self-assembly, charge-transfer kinetics, and catalytic properties of hybrid complexes of CdTe nanocrystals (nc-CdTe) and Clostridium acetobutylicum [FeFe]-hydrogenase I (H(2)ase). Molecular assembly of nc-CdTe and H(2)ase was mediated by electrostatic interactions and resulted in stable, enzy…
The colloidal synthesis of SnSe nanoparticles is accomplished through the injection of bis[bis(trimethylsilyl)amino]tin(II) into hot trioctylphosphine:selenium in the presence of oleylamine. Through the manipulation of reaction temperature particles are grown with the average diameter reliably tuned to 4-10 nm. Quantu…
Nitrogen-vacancy (NV) colour centres in diamond are attracting growing attention due to potential applications in solid-state quantum information processing and magnetometry. Although proof-of-principle experiments have been demonstrated, further development requires the controllable production of defects with a high…
A three-dimensional chiral metal formate framework compound, [NH(4)][Zn(HCOO)(3)], undergoes a paraelectric-ferroelectric phase transition at 191 K triggered by the disorder-order transition of NH(4)(+) cations within the structure.
We report chemical doping (p-type) to reduce the sheet resistance of graphene films for the application of high-performance transparent conducting films. The graphene film synthesized by chemical vapor deposition was transferred to silicon oxide and quartz substrates using poly(methyl methacrylate). AuCl(3) in nitrome…
Printing electronic components on plastic foils with functional liquid inks is an attractive approach for achieving flexible and low-cost circuitry for applications such as bendable displays and large-area sensors. The challenges for printed electronics, however, include characteristically slow switching frequencies a…