Towards hard-magnetic behavior of CoFeO nanoparticles: a detailed study of crystalline and electronic structures, and magnetic properties.

We have used the coprecipitation and mechanical-milling methods to fabricate CoFeO nanoparticles with an average crystallite size () varying from 81 to ∼12 nm when changing the milling time ( ) up to 180 min. X-ray diffraction and Raman-scattering studies have proved the samples crystalizing in the spinel structure. Both the lattice constant and residual strain tend to increase when () increases (decreases).

Investigating the magnetic and magnetocaloric behaviors of LiSm(PO).

We report a detailed study on the magnetic behaviors and magnetocaloric (MC) effect of a single crystal of lithium samarium tetraphosphate, LiSm(PO). The analyses of temperature-dependent magnetization data have revealed magnetic ordering established with decreasing temperature below , where is the minimum of a d/d curve and varies as a linear function of the applied field . The Curie temperature has been extrapolated from () data, as → 0, to be about 0.

Microclimate investigation of vehicular traffic on the urban heat island through IoT-Based device.

Anthropogenic is defined as one of the influencing factors of the climatic phenomenon, called Urban Heat Island (UHI), in which urban areas have higher air temperatures than their rural surroundings. Analyzing the impact of anthropogenic factors, such as vehicular traffic, has implications for the potential benefits of health monitoring systems; however, the spatiotemporal impact of anthropogenic factors, as well as vehicle mobility, has not been thoroughly investigated. This study incorporates vehicle mobility data by leveraging two different sensors; fixed station sensor instruments designed to integrate with the Internet of Things (IoT), and the camera of an area traffic control system (ATCS) that uses CCTV visualization with object detection.

Correction: Structural, magnetic and hyperthermia properties and their correlation in cobalt-doped magnetite nanoparticles.

[This corrects the article DOI: 10.1039/D1RA07407E.].

Catalytic oxygen evolution from hydrogen peroxide by -[Co(en)Cl]@InBTB metal-organic framework catalytic system.

The diethylammonium counter-cations of the [EtNH][In(BTB)] metal-organic framework (InBTB MOF, BTB = 1,3,5-benzenetribenzoate) with an anionic framework can be effectively exchanged with cationic -[Co(en)Cl] complex ions through a simple cation-exchange process. The heterogenized -[Co(en)Cl]-encapsulated InBTB MOF (-[Co(en)Cl]@InBTB) catalytic system maintained the activity of the captured -[Co(en)Cl] complex ion for hydrogen peroxide decomposition in aqueous solution under mild reaction conditions. The captured -[Co(en)Cl] complex also exhibited - isomerization to produce either -[Co(en)Cl]@InBTB or -[Co(en)(HO)Cl]@InBTB based on IR spectroscopic investigation.

Ag/Au nanocluster loaded BiO photocatalyst for methyl orange dye photodegradation.

Visible-light-sensitive Ag and Au nanocluster loaded BiO (Ag-BiO and Au-BiO) semiconductor photocatalysts have been synthesized. The composite materials exhibited increased photocatalytic degradation of the azo-dye pollutant, Methyl Orange (MO). In addition, Au-BiO (Au-7% wt) showed the highest MO degradation rate (0.

Structural, magnetic and hyperthermia properties and their correlation in cobalt-doped magnetite nanoparticles.

Cobalt doped magnetite nanoparticles (Co Fe O NPs) are investigated extensively because of their potential hyperthermia application. However, the complex interrelation among chemical compositions and particle size means their correlation with the magnetic and heating properties is not trivial to predict. Here, we prepared Co Fe O NPs (0 ≤ ≤ 1) to investigate the effects of cobalt content and particle size on their magnetic and heating properties.

N-doped porous carbons derived from Zn-porphyrin-MOF.

N-doped porous metal-organic framework (MOF)-derived carbons (MDCs) were directly synthesized from a new Zn-DpyDtolP-MOF (ZnDpyDtolP·1/2DMF, HDpyDtolP = 5,15-di(4-pyridyl)-10,20-di(4-methylphenyl)porphyrin) containing a 3D hexagonal network through a self-templated carbonization method. KOH-activated MDC derivatives denoted as MDC-700-KOH were also prepared with different weight ratios of KOH activator to MDC (MDC : KOH = 1 : , where = 1, 2). Compared to bare MDC, MDC-700-KOH showed effective improvements of both gas sorption and electrochemical capacitive properties.

Analysis of the effects of Cu-MOFs on fungal cell inactivation.

Three dimensional (3D) copper metal organic frameworks (Cu-MOFs) containing glutarates and bipyridyl ligands (bpa = 1,2-bis(4-pyridyl)ethane, bpe = 1,2-bis(4-pyridyl)ethylene, or bpp = 1,3-bis(4-pyridyl)propane) were synthesized by using previously reported hydrothermal reactions or a layering method. All three Cu-MOFs contained well-defined one dimensional (1D) channels with very similar pore shapes and different pore dimensions. The bulk purities of the Cu-MOFs were confirmed using powder X-ray diffraction (PXRD) and infrared spectroscopy (IR) spectra.

Highly transparent phototransistor based on quantum-dots and ZnO bilayers for optical logic gate operation in visible-light.

Highly transparent optical logic circuits operated with visible light signals are fabricated using phototransistors with a heterostructure comprised of an oxide semiconductor (ZnO) with a wide bandgap and quantum dots (CdSe/ZnS QDs) with a small bandgap. ZnO serves as a highly transparent active channel, while the QDs absorb visible light and generate photoexcited charge carriers. The induced charge carriers can then be injected into the ZnO conduction band from the QD conduction band, which enables current to flow to activate the phototransistor.

Finely crafted quasi-core-shell gadolinium/layered double hydroxide hybrids for switching on/off bimodal CT/MRI contrasting nanodiagnostic platforms.

We successfully synthesized a size-controlled hybrid of layered double hydroxide (LDH) platelets and Gd(OH) nanorods through the reverse micelle method. Under controlled synthetic conditions, the hybrid was developed to a quasi-core-shell structure, where the Gd(OH) nanorods were covered by the LDH platelet assembly, and this was investigated by X-ray diffraction and high-resolution transmission electron microscopy. The zeta potential measurement for the hybrid revealed that Gd(OH) was surrounded by LDH moieties.

Antifungal spp. Associated with the Infructescences of spp. in South Africa.

Common saprophytic fungi are seldom present in infructescences, which is strange given the abundance of mainly dead plant tissue in this moist protected environment. We hypothesized that the absence of common saprophytic fungi in infructescences could be due to a special symbiosis where the presence of microbes producing antifungal compounds protect the infructescence. Using a culture based survey, employing selective media and antifungal assays, we isolated antibiotic producing actinomycetes from infructescences of and .