Papers – Page 16 – TechConnect Briefs

DIRECT: An Efficient Optimization Scheme for Mask Generation Using Inverse Lithography

Xiong W., Tsai M-C, Zhang J., Yu Z., Tsinghua University, CN

Resolution Enhancement Technologies (RETs) are widely used to cope with the severe optical effects that are manifests in sub-wavelength lithography. Inverse Lithography Technique (ILT) has recently been proposed [1-3] as an effective RET for sub [...]

Magnetic Properties of Multi- and Sigle-Domain Particles of CuxNi1-xFe2O4 Ferrites

Msomi J.Z., Moyo T., University of the Free State, ZA

The crossover effect from multi- to single-domain particles on the magnetic properties of CuxNi1-xFe2O4 oxides due to grain size reduction to nanometre scale is investigated. The properties of the bulk and nanosized oxide have been [...]

Influence of His-195 on the nitrogenase FeMo-cofactor activity

Cavallotti C., Moscatelli D., Carrà S., Politecnico di Milano, IT

Mo-nitrogenase is the enzyme responsible for the conversion of atmospheric nitrogen to ammonia. Its active site is the iron-molibdenum cofactor, FeMo-co, which is composed by two incomplete cubes, Fe4S3 and MoFe3S3, connected through three bridging [...]

Slurry sample injection for determination of ferrite nanocolloids chemical composition by ICP spectrometry

Sousa M.H., Lins E.S., Tourinho F.A., Depeyrot J., Martins W.D., Zara L.F., Castro C.F.S., de Castro G.R., Universidade de Brasilia, BR

In the biomedical field, some applications of nanomaterials require dynamically quantifying them in blood and tissues probes. Nevertheless, the usual methods which are employed to titrate the nanoparticles require their dissolution before the chemical analysis, [...]

Poly(vinyl amine) Stabilized Colloidal CdS Quantum Dots of Color-Tunable Photoluminescence: Syntheses and Optical Properties

Chen K.M., Hou S.-S., National Cheng Kung University, TW

The colloidal CdS QD solutions were prepared with PVAm as the stabilizing polymer in a mixed solvent composed of methanol and water. The emitting colors of the prepared CdS QD colloids are tunable by varying [...]

Shape-Controlled Synthesis and Catalytic Behavior of Supported Platinum Nanoparticles

Liu C., Fransson M., Zhou B., Headwaters Nanokinetix Inc., US

A 5% Pt/C catalyst with ~20 nm cubic platinum particles was prepared using a traditional preparation method (i.e. precursor impregnation, calcination, and reduction) and choosing a hydrophobic solvent in the impregnation procedure. These 20 nm [...]

The use of Molecular Precursors for the Preparation of Pd/Co-Alloy Nanoparticles

Montano-Serrano R., Moiras C., Raptis R.G., University of Puerto Rico, PR

The preparation of catalysts from molecular precursors is the main objective of our research. The predetermination of metal composition in molecular precursors is an advantage of this method over others (e.g. co-precipitation). The main objective [...]

Enantiospecific adsorption of chiral molecules on chiral Au nanoparticles

Garzon I.L., Lopez-Lozano X., Perez L.A., Universidad Nacional Autonoma de Mexico, MX

Enantioselectivity in gold clusters is investigated by studying the adsorption of a chiral amino acid (cysteine) on a chiral Au55 cluster using density functional calculations. The highest adsorption energies were found when the amino and [...]

Application of Anderson-Schulz-Flory (ASF) equation in the proiduct distribution of slurry phase FT synthesis with nanosized iron catalyst

Sohrabi M., Tavakoli Araghi A., Karegari A., Amirkabir University of Technology, IR

Application of Anderson- Schulz- Flory (ASF) Equation in the Product Distribution of Slurry Phase FT Synthesis with Nanosized Iron Catalysts Akram Tavakoli Araghi, Morteza Sohrabi∗ , Ali Kargari AmirKabir University of Technology , Faculty of [...]

Single dot luminescence characteristics of CdSe/ZnS core-shell structured quantum dots with different ligands

Yu H., Song N.W., Moon D.W., Shin S.K., Korea Research Institute of Standards and Science, KR

Chemical derivatizations with different ligands were perfomed on CdSe/ZnS core-shell quantum dots (QDs). The role of ligands serves to increase water solubility and bio-compatibility of QDs for in-vivo biomedical fluorescence imaging. These QDs were synthesized [...]