Materials Literature
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Raman gas spectrometry is introduced as a unique tool for the investigation of the respiratory activity that is indicative for growth of bacteria involved in biomineralization. Growth of these bacteria cannot be monitored using conventional turbidity-based optical density measurements due to concomitant mineral format…
Here, we address the question of the validity of an effective description for hyperbolic metamaterials in the near-field region. We show that the presence of localized modes such as surface waves drastically limits the validity of the effective description, and requires revisiting the concept of homogenization in the…
We address the question of the origin of the recently discovered chiral property of the charge-density-wave phase in 1$T$-TiSe${}_{2}$, which so far lacks a microscopic understanding. We argue that the lattice degrees of freedom seem to be crucial for this novel phenomenon. We motivate a theoretical model that takes i…
An organic electrochemical transistor array is integrated with human airway epithelial cells. This integration provides a novel method to couple transepithelial ion transport with electrical current. Activation and inhibition of transepithelial ion transport are readily detected with excellent time resolution. The org…
This study presents the influence of zinc oxide (ZnO) on the structural, thermal, and antibacterial characteristics of chitosan. The chitosan composites containing different concentrations of ZnO (0.5–2 mass ratio with respect to chitosan) were prepared using sol‐cast transformation method. Fourier‐transform infrared…
Biodegradable magnesium (Mg) and its alloys have many attractive properties (e.g. comparable mechanical properties to cortical bone) for orthopedic implant applications, but they degrade too rapidly in the human body to meet clinical requirements. Nanostructured hydroxyapatite (nHA)/poly(lactic-co-glycolic acid) (PLGA…
The photochromic ring-opening reaction of spiropyran has been revisited at the multireference CASSCF and CASPT2 level with a CAS(22e,20o) active space, in combination with density matrix renormalization group (DMRG) methods. The accuracy of the DMRG-CASSCF and DMRG-CASPT2 calculations, with respect to the number of re…
A new family of thiometalate-based composite molecular materials is synthesized and characterized. 1.6 and 1.9 nm-sized clusters are observed in the gas phase utilizing high-resolution ESI-MS. The diversity of the selenite anions as an inorganic ligand is demonstrated by the isolation of the highest nuclearity seleniu…
A series of luminescent microporous organic polymers (LMOPs) have been synthesized by a new synthetic methodology through the palladium catalyzed tandem Suzuki–Heck C–C coupling reactions of several aromatic halides with potassium vinyltrifluoroborate. These polymers are porous with the BET surface areas from 318 to 6…
A novel reactive phosphorus-containing acrylate (ODOPB-AC) was successfully synthesized and characterized, and the flame retardant unsaturated polyester resins (FR-UPR) with various amounts of ODOPB-AC were prepared. The thermal decomposition and flame retardant properties of samples were investigated by thermogravime…
Single crystals of Mo and Ta dichalcogenides, MX 2 (M = Mo, Ta and X = S, Se, Te), have been grown by the vapor transport method in closed atmosphere, using a novel transport reaction that involves a mixture of M, MCl 5 and X as a source. The most important parameters that must be kept under control for succeeding in…
Ceramics, one of the earliest materials used by humans, have been used since the Stone Age and are also one of the core materials supporting modern society. In this article, I will review the features of transparent oxides, the main components of ceramics, and the progress of research on their electro-active functiona…
This paper describes a method for creating a topography-based gradient on a metallic surface to help mitigate problems associated with condensate retention. The gradient was designed to promote water droplet migration toward a specified region on the surface which would serve as the primary conduit for drainage using…
Abstract Hemp fiber-reinforced green composites with organoclay-filled poly(butylene succinate) (PBS) matrix were fabricated by pultrusion process. Morphological studies revealed that the clay particles were intercalated/partially exfoliated when the clay content was lower than 6 wt%. The tensile modulus and strength…
Knowing the structure of porous materials is essential for understanding their properties and exploiting them for applications. Electron crystallography has two main advantages compared to X‐ray diffraction for structure determination. Crystals too small or too complicated to be studied by X‐ray diffraction can be stu…
Structurally uniform and chirality-pure single-wall carbon nanotubes are highly desired for both fundamental study and many of their technological applications, such as electronics, optoelectronics, and biomedical imaging. Considerable efforts have been invested in the synthesis of nanotubes with defined chiralities b…
Carrier multiplication, the generation of multiple electron-hole pairs by a single photon, is of great interest for solar cells as it may enhance their photocurrent. This process has been shown to occur efficiently in colloidal quantum dots, however, harvesting of the generated multiple charges has proved difficult. H…
The structural, electronic, and vibrational properties of glassy Ge${}_{x}$Se${}_{1\ensuremath{-}x}$ are studied using density-functional-based molecular dynamics. The focus is on four compositions ($x=10%,20%,25%,33%$) spanning the rigidity transitions and representing typical compositions of flexible, intermediate,…
In this joint experimental and theoretical work, we investigate collective electronic excitations (plasmons) in free-standing, single-layer graphene. The energy- and momentum-dependent electron energy-loss function was measured up to $50\phantom{\rule{0.28em}{0ex}}\mathrm{eV}$ along two independent in-plane symmetry d…
The geometrical, electronic, and magnetic properties of twisted zigzag-edged graphene nanoribbons (ZGNRs) and novel graphene Möbius strips (GMS) are systematically investigated using first-principles density functional calculations. The structures of ZGNRs and GMS are optimized, and their stabilities are examined. The…