Published in Journal of Nanoparticle Research
Sugar-assisted stable monometallic nanoparticles were synthesized by wet chemical method following a general scheme. Judicious manipulation of the reducing capabilities of different sugars has shown to have a bearing on the particle size that corroborates the shift of the absorbance peak positions and TEM analysis. Evaporation of the precursor solu...
Published in Journal of Nanoparticle Research
TiO2, Ta2O5, and mixed TiO2/Ta2O5 ultrathin films were grown layer-by-layer using a surface sol–gel deposition technique. The technique allows one to prepare smooth films of mixed composition with ångstrom-level control of thickness. The thickness increases per adsorption/hydrolysis cycle were 4.5, 2.1, and 2.5 Å, respectively, for TiO2, Ta2O5, and...
Published in Journal of Nanoparticle Research
Photoluminescence (PL) properties of SiO2 films containing Si nanocrystals (nc-Si) and Er3+ (Yb3+) were studied. PL peaks attributable to the recombination of electron–hole pairs in nc-Si (∼1.5 eV) and the intra-4f shell transition of Er3+ (∼0.81 eV) (Yb3+ (∼1.26 eV)) were observed simultaneously at room temperature. Correlation of the two peaks wa...
Published in Journal of Nanoparticle Research
Studies of the behavior of nanoparticle chain aggregates (NCA) have shown properties similar to those of molecular polymers. Like polymer chains, NCA tend to gather up and become more compact when heated. Under tensile stress, folded chain segments pull out and the NCA elongates. When the tension is relaxed, the chains contract. The stretching of N...
Published in Journal of Nanoparticle Research
In order to illustrate how atomistic modeling is being used to determine the structure, physical, and chemical properties of materials at the nanoscale, we present here the results of molecular dynamics (MD) simulations on nanoscale assemblies of such materials as carbon nanotubes, diamond surfaces, metal alloy nanowires, and ceramics. We also incl...
Published in Journal of Nanoparticle Research
A mullite/mullite nanocomposite powder has been synthesized, composed of nanometer-size 3Al2O3·2SiO2 (‘3/2’) mullite precipitates within a matrix of the high alumina 2Al2O3·SiO2 (‘2:1’) mullite. Historically, the transition from the metastable high-alumina phase to the thermodynamically stable ‘3:2’ phase of mullite has been thought to be a continu...
Published in Journal of Nanoparticle Research
Published in Journal of Nanoparticle Research
Published in Journal of Nanoparticle Research
A novel aerosol charger has been developed, which has high efficiency and high throughput especially for nanometer particles in the size range of 3–50 nm. Unipolar charging with high ion concentration and long charging time is used to obtain the high charging efficiency. High throughput is achieved by reducing particle loss within the charger. This...
Published in Journal of Nanoparticle Research
The current and planned research in nanoscience and engineering will make possible a paradigm shift in nanoscale devices and structures.
