IR – Page 3 – TechConnect Briefs

Preparation of Calcium Zirconate –Silica nano composite and consideration of thermal, electrical and photocatalitical properties

Kermani N., Kargar Razi M., Azad University Tehran North Branch, IR

In this research, Calcium Zirconate–Silica nanocomposite was synthesized and its thermal, electrical constant and photocatalitical properties were evaluated. For preparation of CaZrO3/SiO2, nano powder was synthesized by sol-gel method then was calcinated at 700- 1000 [...]

Composition and magnetic properties of zinc ferrite nanoparticles prepared by co-precipitation method at different temperatures

Reisi Shahraki R., Seyyed Ebrahimi S.A., Ebrahimi M., University of Tehran, IR

In this work, single phase zinc ferrite nanoparticles have been prepared by coprecipitation method at 40, 60 and 80 °C without any subsequent calcination and the effect of the reaction temperature on the composition, structural [...]

Photo-destruction of cancer cells by NIR irradiation and graphene nano-sheets

Abdolahad M., Mohajerzadeh S., Janmaleki M., Akhavan O., University of Tehran, IR

In this paper, we present a novel cancer therapy method based on graphene inclusion in the cell solution and irradiation of the solution by near infrared lasers. The effect of various parameters such as graphene [...]

Analytical investigation of nanofluids dispersion stability

Farzaneh H., Behzadmehr A., Samimi A., University of Sistan and Baluchestan, IR

Experimental and numerical investigations on nanofluids flows at different geometrical configurations and different thermo-fluid conditions show a significant enhancement on the convective heat transfer while the pumping power cost remains reasonable. However, many problems such [...]

High-aspect-ratio deep Si etching of micro/nano scale features with SF6 /H2/ O2 plasma, in a low plasma density reactive ion etching system

Sanaee Z., Poudineh M., Mehran M., Mohajerzadeh S., University of Tehran, IR

In this paper we report a novel low plasma power reactive ion etching technique to achieve high rate, high aspect ratio features on silicon. The etching process is achieved using a sequential passivation and etching [...]

Influence of multiwall carbon nanotubes in mechanical properties of E-glass/epoxy resin/jeffamine-D400 composites

Khoshgoftar M.J., Liaghat G.H., Tarbiat Modares University, IR

Polymer nanocomposites reinforced with carbon nanotubes have attracted recently. The properties of nanocomposites depend greatly on the chemistry of polymer matrices, nature of nanofillers and the way in which they are prepared. Properties of epoxy [...]

Photocatalytic Activity of Coated PET Fabrics with Synthesised Nano TiO2

Elahi A., Khajavi R., Torkian L., Textile Engineering, IR

Different concentration of TiO2 sols (10-40% g/l) synthesized by titanium tetra isopropoxide (TTIP). PET fabric dipped in prepared sols and sol-gel process accomplished at low temperature. Particle size of synthesised Nano TiO2 determined by particle [...]

Realization of Silicon Nano-structured layers on Glass substrates suitable for light emitting diodes

Darbari S., Shahmohammadi M., Mohajerzadeh S., Robertson M.D., Thin Film and Nanoelectronics Laboratories, IR

Si-nano-crystal (Si-nc) layers with luminescent behavior on glass substrate have been prepared using a time multiplexed plasma hydrogenation and reactive ion etching at temperatures below 450oC. Various techniques such as SEM, Photo-luminescent and TEM analyses [...]

Photo Catalytic Activity of Coated PET Fabrics with Synthesised Nano TiO2 & ZnO: A Comparative Study

Elahi A., Torkian L., Khajavi R., Azad University-Tehran South Branch, IR

The coated PET fabric with atomic ratios of Ti/(Ti+Zn) of 100%, 75%, 50%, 25%, and 0% was successfully prepared via sol–gel process from directly mixing TiO2/ZnO sol. The scanning electron microscopy (SEM) observation, energy dispersive [...]

Controllable Sequential Low Temperature Plasma Assisted Growth of Vertical Multi-wall & Single-wall CNTs

Kolahdouz Z., Darbari S., Mohajerzadeh S., University of Tehran, IR

By investigating the effects of growth parameters of CNTs, we have arrived at small diameter, single/multi-wall nanotubes at low temperatures. Synthesis of CNTs was performed using the gas mixture of the C2H2/CH4 gas and H2 [...]