Herein, for the first time, we report a generalized strategy successful synthesis of highly crystalline metal and oxide nanoparticles embedded in carbon matrix by controlled thermolysis organic frameworks (MOFs). The rationalized broad range oxides nanoparticles, such as Cu/CuO, Co/Co(3)O(4), ZnO, Mn(2)O(3), MgO CdS/CdO, MOFs demonstrates time that ions with reduction potential -0.27 volts or higher present always form pure during N(2), whereas lower than N(2). Another point interest is fact...

The syntheses of inorganic materials by biological systems is characterized processes that occur close to ambient temperatures, pressures, and neutral pH, as exemplified biosilicification biomineralization in nature. Conversely, laboratory-based oxide often require extremes temperature pressure. We have shown here the extracellular, room-temperature biosynthesis 4−5 nm ternary nanoparticles such barium titanate (BT) using a fungus-mediated approach. tetragonality well lowered Curie...

Abstract Magnetic nanoparticles embedded in polymer matrices are good examples of functional nanostructures with excellent potential for applications such as electromagnetic interference shielding, magneto‐optical storage, biomedical sensing, flexible electronics, etc. Control over the dispersion nanoparticle phase a matrix is critical and often challenging. To achieve dispersion, competition between polymer–polymer polymer–particle interactions have to be balanced avoid clustering particles...

Magnetic nanoparticles embedded in polymer matrices have excellent potential for electromagnetic device applications like interference suppression. We synthesized nanocomposites of poly(methylmethacrylate) doped with varying concentrations iron (∼20 nm size). The were produced using a microwave plasma technique and natural oxide surface layer passivation. These processed melt blending technique. processing conditions optimized to achieve good uniform dispersion the matrix. concentration...

Here, we report the effect of reduction in particle size on temperature dependent magnetization chemically synthesized BiFeO3 nanocrystals with average grain 55 nm. The X-ray photoelectron spectroscopy results show a significant broadening binding energy peaks associated to Fe3+ 2p3/2 core levels due reduced size. Additionally, nanosize effect, M-H loops coercivity starting from 390 K an anomaly located vicinity 150 our Hc vs T as well Mr/Ms(50 kOe) curves. At this temperature, both and...

We present a novel approach to synthesize MnZnferrite (MZF)–NiMnZnferrite(NiMZF)–Polyaniline (PANI) particles, where is the magnetic core, and PANI conducting layer. The commercial ferrite Ni–ferrite particles are primarily used, PANI–ferrite with hybrid structure synthesized via an oxidative electrochemical polymerization of aniline in aqueous solution, which contains well-dispersed particles. influence content respect electrical ferromagnetic properties composite has been investigated by...

Curcumin ((1E,6E)-1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione) is an active component of turmeric; it responsible for its characteristic yellow color and therapeutic potential, but poor bioavailability remains a major challenge. In order to improve the curcumin, various approaches have been used. One possible increase curcumin conjugation on surface metal nanoparticles. Therefore, in present study, we report binding gold nanoparticles (AuNPs). The AuNPs were synthesized by...

In curcumin, keto-enol-enolate equilibrium of the heptadiene-dione moiety determines its physiochemical and antioxidant properties. However, poor solubility in water at neutral pH room temperature decreases bioavailability. Potential therapeutic applications have triggered an interest manipulating curcumin as stability remains poorly understood. Here, mechanism behind various temperatures influence interplay temperature, intramolecular H-bonding, intermolecular forces is reported, which...

Uniform, organically functionalized, 8.5-nm-diameter nanocrystals of ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ were synthesized and assembled into close-packed monolayer as well multilayer arrays using the Langmuir-Blodgett technique. The ac dc magnetic susceptibility measurements on in comparison with isolated particles indicate strong dipolar interactions a spin-glass-like slowing down relaxation times. Differences characteristics between to observed, such larger remanent magnetization higher...

A novel anionic metal–organic cube (MOC-1), [Ni8(HImDC)12]8−, has been synthesized by metal–ligand directed assembly of eight tri-connected Ni nodes and twelve doubly deprotonated bis(bidentate) imidazoledicarboxylic acid ligands (HImDC).

Tunneling junctions of stacked monolayers uniform, organically functionalized ${\mathrm{Fe}}_{3}{\mathrm{O}}_{4}$ nanocrystals 5.5 nm average diameter were prepared. Current-voltage characteristics the studied as function temperature and magnetic field. An abrupt increase in resistance was observed on cooling below 96 K. This is attributed to Verwey metal-insulator transition nanocrystals. Above K, $I\ensuremath{-}V$ curves reflect density states narrow conduction band. conductance peak...

Solvothermal reactions of Cu(NO3)2·3H2O with 4,4′-(hexafluoroisopropylidene) bis(benzoic acid) (C17H10F6O4, H2hfbba) and terminal monodentate ligand 3-methyl pyridine (3-picoline/3-mepy) in the presence N,N-dimethyl formamide (DMF) N,N-diethyl (DEF) solvents gave rise to two structurally different two-dimensional (2D) fluorinated metal organic frameworks (F-MOFs). The effect choice solvent has been clearly reflected structures obtained. F-MOFs reported this paper are formulated as...

The rare earth orthochromites are extremely interesting due to the richness of their optical, dielectric, and magnetic properties as well multiferroic which make them suitable materials study in nanoregime. However, wet-chemical synthesis these nanosize is nontrivial. Here, we report for first time, detailed Raman spectra dielectric chemically synthesized GdCrO3 nanoparticles size ranging from 40 60 nm. dictated by competing Cr3+–Cr3+, Gd3+–Cr3+, Gd3+–Gd3+ superexchange interactions...

A carboxylate-based flexible ligand, 5-(4-carboxybenzyloxy)isophthalic acid (p-cbiaH3), readily reacts with Co(II) salts in the presence of different pyridine-based coligands such as 4-bis(4-pyridinylmethyl)piperazine (bpmp) or 1,2-di(4-pyridyl)ethylene (dpe) under hydrothermal conditions to afford two three-dimensional (3D) coordination polymers, {[Co4(OH)2(p-cbia)2(bpmp)-(H2O)3]·2H2O}n (1) and {[Co4(OH)2(p-cbia)2(dpe)(H2O)4]·2H2O}n (2). Both compounds have been characterized by X-ray...

Four new partially fluorinated metal organic frameworks (HF-MOFs) have been synthesized under different solvothermal conditions (H2O or dimethylformamide (DMF)) from transition cations [Co2+ and Mn2+], 3-methyl pyridine (3-mepy) 4,4′-(hexafluoroisopropylidene) bis(benzoic acid) (C17H10F6O4, H2hfbba), to determine the influence of reaction on formation MOFs. This family materials displays a striking degree structural similarity depending solvent synthesis. HF-MOFs H2O [Co-HFMOF-W,...

Employment of two different pyridyl–pyrazolyl-based ligands afforded three octanuclear lanthanide(III) (Ln = Dy, Tb) cage compounds and one hexanuclear neodymium(III) coordination cage, exhibiting versatile molecular architectures including a butterfly core. Relatively less common semirigid asymmetric ligand systems show an interesting trend forming polynuclear lanthanide complexes with environments around the metal centers. It is noteworthy here that construction complex itself challenging...

We report a tunable band gap of bismuth ferrite–polyaniline core–shell nanoparticles from 2.24 to 1.98 eV and the variation coercivity 118 100 Oe, by varying thickness polyaniline shell.

In this contribution, the structural and magnetic properties of DyCrO3 nanoplatelets, synthesized by a hydrolytic sol–gel method, have been investigated. The crystalline phase was attained at decomposition temperature 800 °C for citric acid oxalic acid, respectively their analysis indicates distorted orthorhombic perovskite structure nanoplatelets. dc-magnetization curve shows Néel ∼144 ∼146 K nanoplatelets using (DCO (C)) (O)), respectively. addition, DCO (O) weak anomalies ∼22 ∼6 in...

We report the temperature-dependent Raman and dielectric spectroscopy of chemically synthesized BiFeO3 nanoparticles (average size ∼50−60 nm). The spectra (90−700 K) show two sets transitions in lowest E mode, associated with Bi−O bond motion situated close proximity to spin reorientation reported for BiFeO3, thereby indicating existence possible coupling between magnons phonons particle below helical order parameter (62 These are slightly shifted temperature comparison bulk single crystals....

An ether bridged tricarboxylic acid ligand, 5-(4-carboxybenzyloxy)isophthalic (p-cbiaH3) has been used to construct three coordination polymers with Co(II) salts in presence of different nitrogen donor ligands such as 1,4-bis(4-pyridinylmethyl)piperazine (bpmp), dipyridine-4-yl-diazene (dpd), and 4,4′-bipyridine (bpy). The products formed under hydrothermal conditions are formulated {[Co3(p-cbia)2(bpmp)2(H2O)6]·10H2O}n (1), {[Co2(p-cbiaH)2(dpd)(H2O)2]}n (2) {[Co3(p-cbia)2(bpy)(H2O)8]·6H2O}n...