Papers – Page 67 – TechConnect Briefs

Controlling the Size and Morphology of Silver Nanoparticles: Role of Chemical Routes

Ahmad T., Jamia Millia Islamia (Central University), IN

The preparation of nanoparticles with well defined size and morphology is an important challenge for various industrial applications. Silver nanoparticles with controlled size and morphology have been prepared successfully through various chemical routes (Inverse microemulsions, [...]

Green and Continuous Hydrothermal Synthesis of Nanophosphors for Biomedical Applications

Gruar R., Kellici S., Tighe C., Darr J., UCL, UK

The luminescent properties of Y2O3:Eu have attracted considerable research interest due to the emission and chemical stability of the oxide phosphor. Subsequently, we evaluated the calcination of YOOH:Eu (4% dopant) synthesised directly in a continuous [...]

Synthesis of nanocrystalline nitrate enclathrated zeolite with intermediate framework structure between sodalite (SOD) and cancrinite (CAN)

Buhl J.-Ch., Cramm S., Leibniz University Hannover, DE

Synthesis of nitrate enclathrated nanocrystalline aluminosilicate zeolite was performed in the system Na2O-SiO2-Al2O3-H20-NaNO3-(TEA) under superalkaline low temperature conditions at 333 K. Formation of nanoparticles occurred already after 3 hours with sizes not exceeding 50 nm [...]

Hydrothermal Synthesis and Properties of Hierarchical ZnO and Eu-doped ZnO 3D Structures

Verissimo C., Abbaspourrad A., Sunter K., Capasso F., Moshkalev S., Weitz D., University of Campinas - UNICAMP, BR

Hierarchical oxide nanostructures are very promising materials for different applications, such as gas sensing, due to their high surface area. Literature shows that hierarchical nanostructures improve gas sensing response and response speed. This effect is [...]

Wet organometallic chemistry for palladium nanoparticles synthesis performed in an organic media and under supercritical conditions in microreactors

Desportes S., Tidona B., von Rohr Ph.R., ETH Zürich, CH

Nanoparticles are been produced in a microreactor under different operating conditions, spefically under supercritical CO2. The known organometallic chemistry is been used to create Pd-nanoparticles. Compared to the batch process the processing time could be [...]

Preparation and characterization of PPy-CD nanospheres with a core-shell nanostructure

Shang S.M., The Hong Kong Polytechnic University, HK

The delivery of unique nanospheres has aroused wide attention due to the potential applications in optical, electrical, magnetic, and biological devices. Special attention has recently been paid to the methods for controlling the size and [...]

Synthesis of Molybdenum Nanoparticles by RF Plasma

Park J.-I., Research Institute of Industrial Science and Technology(RIST, KR

Molybdenum nanoposders have been synthesized in a RF plasma by controlling the various process paarameters. The obtained Mo nanopowders are characterized by SEM, TEM, and XRD. Mo nanopowders are sintered to a pellet with ultra-fine [...]

Synthesis of nanocrystalline ZnO powder using ultrasonic atomization technique and application of its thick films for highly toxic gases

Patil L.A., Pratap College Amalner, IN

ABSTRACT: Nanocrystalline ZnO powder was prepared using ultrasonic atomization technique. Thick films of this powder were prepared using simple screen printing technique. Pt-modified-ZnO (platinum activated) films were obtained by dipping pure ZnO films into an [...]

Surface modification of powders and nanostructure deposition in the afterglow of a low power barrier discharge at atmospheric pressure

Sonnenfeld A., Reichen P., von Rohr Ph.R., ETH Zürich, CH

The precipitation of solid-state sphere-like nanostructures from an organosilicon precursor at atmospheric pressure is investigated in the prospect of the improvement of powder flowability by the attachment of nanoscopic spacers to the powder particles surfaces. [...]

Removal of 10-nm contaminant particles from a wafer surface with supersonic CO2 particle beam

Kim E-J, Kim I-H, Kim E-J, Kim I-H, Lee J.W., POSTECH, KR

Contaminant control is becoming a major issue of nano-scale devices. Cryogenic aerosol beam using micron-sized aerosol particles has long been successfully used to remove contaminant particles (CPs) down to 50nm, and supersonic particle beam using [...]