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Article
Influence of Genesis on Mechanochemical Activation and Reactivity of Boehmite Prepared by Thermal and Hydrothermal Transformation of Gibbsite
The focus of this paper is on the mechanical activation and reactivity of boehmite (γ-AlOOH) synthesized by thermal transformation (B-TH) and hydrothermal transformation (B-HT) of the same gibbsite (Al2O3·3H2O) p...
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Article
Stabilization of Metastable States Generated via an Affordable Mechanochemical Route for Functional Nanocomposites
This short review introduces recent preparative processes of functional nanocomposites via mechanochemical routes. Three case-studies published by the present author and his colleagues are centered, i.e., (i) ...
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Article
Change in the dispersion states of short-length-cellulose nanofibers upon dilution investigated by a time-domain nuclear magnetic resonance (TD-NMR)
A short-length cellulose nanofiber (CNF) aqueous sol, prepared by a high-pressure homogenizer, showed a rapid longer relaxation time (T2) in the low-field 1H-nuclear magnetic resonance (NMR) when diluted from 20 ...
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Article
Microstructure and surface activity of mechanically-dispersed cellulose nanofiber aqueous sol
Cellulose nanofiber (CNF)-derived functional papers hold promise for application in various fields due to their unique properties such as gas barriers, high strength, transparency, etc. Mechanochemistry offers...
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Article
Open AccessEmergence of ferromagnetism due to charge transfer in compressed ilmenite powder using super-high-energy ball milling
Ilmenite, FeTiO3, is a common mineral in nature, existing as an accessory phase in the most basic igneous and metamorphic rocks, for example, it is derived from the upper mantle. Therefore, an understanding of th...
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Chapter and Conference Paper
Modification of TiO2 and ZnO Particles Under Mechanical Stress with Polypropylene
Solid-state process of introducing oxygen vacancies into the structure of TiO2 and ZnO particles was studied. The phase transformations of metal oxides throughout the process were examined by X-ray diffraction (X...
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Article
Mechanochemical syntheses of LiFeGe2O6-based nanocomposite and novel nanoglassy LiFeTi2O6
Two members of the pyroxene family, the germanate-type LiFeGe2O6 and the titanate-type LiFeTi2O6, are prepared for the first time via non-conventional one-step mechanosynthesis. The evolution of the as-prepared m...
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Article
How can we make solids more reactive? Basics of mechanochemistry and recent new insights
By starting from the basics of solid-state chemical processes, the definition, concepts, particularities, and technological benefits of mechanochemistry are explained. Emphasis is laid on: (1) production and r...
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Article
Electrochemical properties of spinel Li4Ti5O12 nanoparticles prepared via a low-temperature solid route
Spinel phase Li4Ti5O12 (s-LTO) with an average primary particle size of 150 nm was synthesised via a solid state route by calcining a precursor mixture at 600 °C. The precursor was prepared from a stoichiometric ...
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Article
Modification of tin oxide nanoparticles by fluorocarbon solids via a mechanochemical route
Interfacial reactions at the surface of SnO2 nanoparticles adjacent to the fluorocarbon solids (FCS) under mechanical stressing were compared in an attempt to their modification by introducing fluorine and carbo...
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Article
Modification of titania nanoparticles for photocatalytic antibacterial activity via a colloidal route with glycine and subsequent annealing
Changes in the colloid-chemical and photocatalytic properties of titania nanoparticles by attrition milling in the presence of glycine (Gly) and subsequent heat treatment were examined. By milling at 1500 rpm ...
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Article
Preparation of core–shell poly(l-lactic) acid-nanocrystalline apatite hollow microspheres for bone repairing applications
In this paper, hybrid inorganic–organic core–shell hollow microspheres, made of poly(l-lactic acid) (PLLA) and biomimetic nano apatites (HA), were prepared from biodegradable and biocompatible substances, suitabl...
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Article
Preparation of injectable auto-forming alginate gel containing simvastatin with amorphous calcium phosphate as a controlled release medium and their therapeutic effect in osteoporosis model rat
Highly soluble amorphous calcium phosphate powder (ACP) was added to the alginate gel as a buffering agent, in an attempt to enable widely controlled release while avoiding an acidification of the gel-environm...
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Article
Electronic States of Mn2+ in ZnS:Mn Nanoparticle Examined by EPR Measurements and Molecular Orbital Calculation
The discrete variational Xα method was introduced to elucidate the possible factors of luminescence enhancement of ZnS:Mn modified by poly acrylic acid. The effective charge calculation of Mn indicated that th...
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Article
Design, Synthesis, and Characterization of Hydroxyapatite Particulates
New hydrothermal technology for the preparation of hydroxyapatite designer particulates has been developed. Phase diagrams were constructed for the pH dependent equilibrium between monetite and HA from 50 to 2...
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Article
Morphology Control of Pulsed-Laser Deposited Ag Quantum Dots
Self-organized Ag nanodots were deposited on Si(100) by a pulsed laser deposition method. A compact apparatus was specially developed for this purpose with Nd:YAG-laser. Factors dominating size and morphology ...
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Article
Function of glycine during solid-state reaction toward well-crystallized fine particulate barium titanate
Effects of glycine added to BaCO3 and TiO2 mixtures were examined during a solid-state reaction toward phase pure BaTiO3 for MLCC with the average particle size below 180 nm and the tetragonality, c/a, above 1.00...
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Article
Evaluation of additive effects and homogeneity of the starting mixture on the nuclei-growth processes of barium titanate via a solid state route
In an attempt to obtain finest possible microparticles of BaTiO3 (BT) with highest possible tetragonality via a solid state route, starting mixtures comprising BaCO3 and TiO2 were subjected to various pretreatmen...
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Article
Morphology control of goethite acicular particles during aging by nitrogen bubbling and subsequent reactive aeration
Conditions for synthesizing acicular fine particles of goethite with high aspect ratio were devised by oxidizing mixed slurry comprising ferrous carbonate and hydroxide after neutralizing by alkali carbonate. ...
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Article
High-affinity integration of hydroxyapatite nanoparticles with chemically modified silk fibroin
Hydroxyapatite (HA)-based nanocomposites were prepared by a co-precipitation method with silk fibroin (SF) serving as organic matrix. Silk fibroin was chemically modified with an alkali solution or an enzyme a...
