Papers – Page 61 – TechConnect Briefs

Synthesis and characterization of copper oxide decorated zinc oxide nanorods

Lim S.K., Hong S.H., Hwang S.H., Kim H-S, Kim S., Lee D.J., Kim H-S, Kim S., DGIST(Daegu Gyeongbuk Institute of Science & Technology), KR

One-dimentional nanostructures in the form of nanorods, nanowires, nanofibers or nanotubes, appear as an exciting research area for their great potential of applications. Zinc oxide is an n-type semiconductor that has been well known for [...]

One-pot synthesis of monodisperse PbSe quantum dots and graphene oxide nanocomposites

Pan Yi, Lombardi J.R., City College of New York, US

A new, one-pot method to synthesize monodisperse PbSe quantum dots (QDs) and graphene oxide (GO) nanocomposites (GO-PbSeQDs) is reported here. PbCl2 complexed with oleylamine was used as the Pb precursor. Se powder dissolved in long [...]

CdSe Nanoparticles in Silica Matrix by Sol Gel method

Hullavarad N., Hullavarad S., Hullavarad N., Hullavarad S., University of Alaska Fairbanks, US

‘Quantum dots’ or nanoparticles of diverse semiconductor materials are extensively studied because of their interesting size dependent properties. It is further interesting to organize the quantum dots in the form of superlattices thin films, monolithics, [...]

Facile doping of silica nanoparticles with far-red cyanine dyes using the microemulsion method

Nooney R., McDonagh C., Biomedical Diagnostics Institute, IE

We prepared silica NPs doped with two far-red absorption cyanine dyes, FR670 and Cy5, using the microemulsion method. At these wavelengths there is less autofluorescence from biological molecules, solvents and substrates. The effects of changing [...]

Nanogel Star Polymer Nanostructures of Controlled Size, Molecular Architecture and Functionality: No Assembly Required

Miller R.D., Sly J., Lee V.Y., Appel E., Nguyen T., Nunes H., Tjio M., Gomez L., McNeil M., Munninghoff J., Rowan A.E., IBM Almaden Research Center, US

We have developed versatile routes to nanogel core, multiarm star polymeric unimolecular amphiphiles that provides exquisite control over molecular size, polydispersity, chain and periphery functionality which eliminate the dynamic equilibrium associated with polymeric micelles. . [...]

Pulsed laser generation of clean colloidal metal nanoparticles

Bärsch N., Bartke D., Barcikowski S., Particular GmbH, DE

In contrast to colloidal chemistry, pulsed laser ablation in liquids is a physical process that generates nanoparticles e.g. from precious metals or alloys directly in water or organic solvents. Zeta potential values up to -80 [...]

Synthesis of Non-Spherical CdSe Quantum Dots

Ivanova O.S., Zimmermann K.A., Campbell T.A., Virginia Tech, US

Here we describe the synthesis of non-spherical CdSe quantum dots (QDs) through high temperature reduction in the presence of TOP (Tri-n-octylphosphine) and TOPO (Tri-n-octylphosphine oxide). High affinity of phosphine oxide to the surface of CdSe [...]

A simple approach for the synthesis of anisometric particles by electrospinning

Friedemann K., Max-Planck-Institut for Polymer Research Mainz, DE

We developed a new and simple approach to fabricate large amounts of anisometric particles via controlled fragmentation of electrospun composite nanofibers. Polystyrene nanoparticles were embedded as void precursors in silica fibers by electrospinning of mixed [...]

Synthesis and Characterization of Nickel Ferrite (NiFe2O4) nanoparticles with Silver Addition for H2S gas detectors

Domínguez-Ruiz N., García-Casilla P.E., Hernández-Paz J.F., Ramos-Murillo M., Ambrosio-Lazaro R.C., Universidad Autonoma de Ciudad Juarez, MX

The objective of this work is to study the influence of silver as additive in nickel ferrite sensors to improve the hydrogen sulfide detection sensibility. Sensors made of NiFe2O4 nanoparticles with and without Silver (3 [...]

A toolbox-set of Nanoparticles

Jamier V., Casal E., Puntes V., Catalan Institute of Nanotechnology, ES

The development of nanotechnology has increased exponentially over the past decades with numerous nanoparticles (NPs) offering a “toolbox-set” ready to be used in a wide range of applications such as materials science, catalysis, medicine, energy [...]