Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
A novel nanohybrid ratiometric fluorescence sensor is developed for selective detection of mercuric ions (Hg(2+)), and the application has been successfully demonstrated in HEPES buffer solution, lake water, and living cells. The sensor comprises water-soluble fluorescent carbon nanoparticles (CNPs) and Rhodamine B (R…
Offering mild, non-invasive and deep cancer therapy modality, radio frequency (RF) radiation-induced hyperthermia lacks for efficient biodegradable RF sensitizers to selectively target cancer cells and thus avoid side effects. Here, we assess crystalline silicon (Si) based nanomaterials as sensitizers for the RF-induc…
Abstract Background It has been known for quite some time now that silver nanoparticles (AgNP) can inhibit microbial growth and even kill microbes. Our investigation reports the antimicrobial activity of AgNP against a model bacterium, Escherichia coli . Methods The aqueous extract of Lycopersicon esculentum (red toma…
Nature regulates complex structures in space and time via feedback loops, kinetically controlled transformations, and under energy dissipation to allow non-equilibrium processes. Although man-made static self-assemblies realize excellent control over hierarchical structures via molecular programming, managing their te…
Inserting polymers into a crystalline inorganic matrix to understand the structure, position, and the structure-property relationships of the resulting composites is important for designing new inorganic-organic materials and tuning their properties. Single crystals of polymer-chalcogenide composites were successfully…
A donor-acceptor-type fluorophore containing a twisted diphenylacrylonitrile and triphenylamine has been developed by using the Suzuki reaction. The system indicates typical intramolecular charge-transfer properties. Upon mechanical grinding or hydrostatic pressure, the fluorophore reveals a multicolored fluorescence…
A theoretical model for describing effective thermal conductivity (ETC) of nanocrystalline materials has been proposed, so that the ETC can be easily obtained from its grain size, single crystal thermal conductivity, single crystal phonon mean free path (PMFP), and the Kaptiza thermal resistance. In addition, the rela…
3D printing of reduced graphene oxide (rGO) nanowires is realized at room temperature by local growth of GO at the meniscus formed at a micropipette tip followed by reduction of GO by thermal or chemical treatment. 3D rGO nanowires with diverse and complicated forms are successfully printed, demonstrating their abilit…
Chitosan, which is derived from a deacetylation reaction of chitin, has attractive antimicrobial activity. However, chitosan applications as a biocide are only effective in acidic medium due to its low solubility in neutral and basic conditions. Also, the positive charges carried by the protonated amine groups of chit…
In this study, we systematically investigate the mechanism of single-layer MnO2 nanosheets suppressing fluorescence of 7-hydroxycoumarin and, based on this, demonstrate a new fluorescent method for in vivo sensing of ascorbic acid (AA) in rat brain. The mechanism for the fluorescence suppression is attributed to a com…
Atomically precise gold nanoclusters protected by thiolate ligands, Aun(SR)m, have emerged as a new class of nanomaterial in recent years. Many different sizes of Aun(SR)m nanoclusters have been synthesized and some have been crystallographically characterized. These atomically precise Aun(SR)m nanoclusters exhibit st…
In this paper we present the possibility to realize the direct plasmadynamic synthesis of dispersed crystalline boron carbide in the supersonic jet of boron-carbon electrical discharge plasma flowing into the chamber filled with argon at ambient pressure and temperature. The phase composition was determined using X-Ra…
O uso indiscriminado de antibioticos tem selecionando micro-organismos resistentes a drogas antibacterianas, exigindo a investigacao e desenvolvimento de novos medicamentos. Devido a isso, a quitosana fungica foi utilizada como um novo composto antibacteriano, verificando tambem o tempo de contato necessario para sua…
Packaging serves a number of essential functions and conventional thermoplastics derived from fossil fuels are dominant in the packaging industry. However, there are serious issues with their environmental persistence and the leaching of their various additives. In contrast, the use of natural, biodegradable bioplasti…
Fabrics are often subject to repeated creasing and bending deformations, such as elbow movements, and the resilience of crease recovery is an important property that affects fabric’s serviceability. In this research, nine types of woven fabrics were examined on an automated crease recovery tester repetitively to inves…
This study presents functionalizable photoluminescent magnetic iron oxide nanoparticles (PLMNPs) produced by heating magnetic nanoparticles coated with non-photoluminescent hydrophilic poly(acrylic acid) (PAA) but without any add-on photoluminescent chemicals. The photoluminescence of PLMNPs is originated from a carbo…
The anisotropic mechanical behavior of γ -TiAl alloys has been observed and repeatedly reported, but the effect of crystallographic orientations on the crystal instability of γ -TiAl is still unclear. In this paper, the orientation-dependent crystal instability of γ -TiAl single crystals was investigated by performing…
We provide a highly sensitive, uniform and reproducible surface-enhanced Raman scattering (SERS) performance obtained from the randomly aggregated Au/Ag nanoalloy shells substrate. Au/Ag nanoalloy shells consist of SiO 2 core and Au/Ag alloy shells layer. The obtained Au/Ag nanoalloy shells with a monodisperse size di…
The application of high voltage to oil shale initiates partial discharges (PDs) with the following treeing like in insulating dielectrics. Critical PDs and treeing with a high propagation rate occur under the low electrical intensity ~10 2 V/cm due to oil shale's high porosity, heterogeneity and anisotropy. The comple…
We present a mean field theory to describe phase behaviors in mixtures of a polymer and a cholesteric liquid crystal under an external magnetic or electric field. Taking into account a chiral coupling between a polymer and a liquid crystal under the external field, we examine twist-untwist phase transitions and phase…