Papers – Page 65 – TechConnect Briefs

Silicon and Germanium Nanocrystal Thin Films Prepared Using Innovative Nonaqueous Electrophoretic Deposition

Haag M., Sipe J., Universal Nanotech Corporation, US

As cost effective synthetic routes for producing large quantities of high purity size-specific nanoparticles become fully realized, the next challenge lies in fabricating devices that utilize the unique size-dependent optoelectronic properties inherent in quantum dot [...]

Biological synthesis of copper nanoparticles using plant extract

Lee G., Lee H.J., Lee G., Lee H.J., Jang N.R., Yun J.H., Song J.Y., Kim B.S., Chungbuk National University, KR

Copper nanoparticles were biologically synthesized using plant leaf extract as reducing agent. On treatment of aqueous solutions of CuSO4•5H2O with leaf extract (Magnolia), stable copper nanoparticles were formed. UV-vis spectroscopy was used to monitor the [...]

Hydrothermal approach to a carbon graphite encapsulated FeCo nanocrystals for diagnosis, hyperthermia therapy and siRNA delivery

Park J.K., Jung J.J., Subramaniam P., Shah B., Kim C.J., Lee J-K, Lee K.B., Lee J-K, Lee K.B., Korea Research Institute of Chemical Technology, KR

An effective therapeutic approach against cancer requires the combination of several modalities such as chemotherapy, radiation, and hyperthermia. However, the development of multifunctional nanomaterial-based systems that can provide the combined therapeutics and molecular imaging with [...]

Europium-doped gadolinium sulfide nanoparticles as a multimodal imaging agents for bio-application

Park J.K., Lee S.J., Korea Research Institute of Chemical Technology, KR

Most of the magnetic nanoparticles based on iron oxides have been widely used experimentally for numerous in vivo applications such as magnetic resonance imaging (MRI) contrast enhancement, tissue repair, hyperthermia, medical diagnostics, and therapeutics. These [...]

Self-assembled fluorescent magnetic nanoprobes for multimode-biomedical imaging

Lim E.-K., Haam S., Yonsei University, KR

We fabricated multimode nanoprobes for acquisition of biological information at different object levels, i.e., in vivo detection and ex vivo validation for characterizing tumor angiogenesis. Fluorescent magnetic nanoprobes (FMNPs) were synthesized by using amphiphilic pyrenyl [...]

Monitoring of glass transition at a polymer surface by localized surface plasmon resonance

Kaan Kalkan A., Putla R.K., Oklahoma State University, US

The temperature below which a polymer is in glassy state and above which is in viscous state is called the glass transition temperature (Tg). Investigations on polymer surfaces by various groups revealed that the surface [...]

Color tunable nanophosphors

Sotiriou G.A., Schneider M., Pratsinis S.E., Particle Technology Laboratory, ETH Zürich, CH

In this study, yttrium oxide nanophosphors doped with Tb and Eu ions were made by flame aerosol technology. The emission color of these nanophosphors could be precisely tuned from green to red by tuning the [...]

Inverter Circuits Based on Low-Temperature Solution-Processed ZnO Nanoparticle Thin-Film Transistors

Wolff K., Vidor F.F., Hilleringmann U., University of Paderborn, DE

Promising enhancement-load inverter cuircuits using bottom-gated ZnO nanoparticle thin-film transistors and a poly(4-vinylphenol) (PVP) dielectric are demonstrated. The deposition of the ZnO active layer is done by spin coating of a colloidal dispersion. Due to [...]

Enhancement in photoluminescence emission in the UV-visible region from chemically synthesized silver doped ZnS nanoparticles

Sarkar R., Kumbhakar P., Mitra A.K., NIT Durgapur India, IN

Nanoparticles of ZnS:Ag doped with Ag+ (0.5%) and capped with polyvinyl pyrolidone (PVP) have been synthesized by chemical co-precipitation method. The measured particle size is ~2.5 nm which has been obtained from the analyses of [...]

Optical Properties of Ternary Alloyed Cd1-xZnxSe Semiconductor Nanocrystals

Chen I-H., Wang K-W, Chung S-R, National Formosa University, TW

In order to obtain high quantum yield (QY) nanocrystals and simplify the preparation procedure, one-pot synthetic method is conducted to prepare ternary alloyed nanocrystals. Ternary alloyed Cd1-xZnxSe (x=0, 0.2, 0.5, 0.8 and 1) semiconductor nanocrystals [...]