Instituto Politecnico Nacional – TechConnect Briefs

Pd/WO3-ZrO2 catalysts: synthesis, characterization and catalytic evaluation

Chen L.F., Ramirez Sebastian S.P., Wang J.A., Instituto Politecnico Nacional, MX

The present work aims at searching for new catalysts for n-heptane isomerization. Four WO3-ZrO2 oxides were prepared by varying WO3 content in 5, 10, 15 and 25 wt% using a sol-gel technique. The 1wt% Pd/WO3-ZrO2 [...]

Pd/WO3-ZrO2 catalysts: synthesis, characterization and catalytic evaluation

Chen L.F., Ramirez Sebastian S.P., Wang J.A., Instituto Politecnico Nacional, MX

The present work aims at searching for new catalysts for n-heptane isomerization. Four WO3-ZrO2 oxides were prepared by varying WO3 content in 5, 10, 15 and 25 wt% using a sol-gel technique. The 1wt% Pd/WO3-ZrO2 [...]

Electronic effects in CdSe/ZnS quantum dots conjugated to Interleukin 10 antibodies

Torchynska T.V., Casas Espinola J.L., Douda J., López de la Luz O.S., Instituto Politecnico Nacional, MX

Photoluminescence (PL) and Raman scattering spectra of none- and bio-conjugated CdSe/ZnS and CdSeTe/ZnS quantum dots (QDs) have been studied. QDs, characterized by emission at 605, 655 and 705nm, have been conjugated with anti Interleukin 10 [...]

MOCVD Preparation and photoluminiscence of ZnS nanowires

Juarez F., Juarez J.M., Juarez F., Juarez J.M., Instituto Politecnico Nacional, MX

In this communication, we report a facile solution route to synthesize single crystalline wurtzite ZnS nanowires at low temperature (170 °C) using MOCVD system. Observations on the microstructure of the as-synthesized ZnS by high-resolution electron [...]

Characterization of an electrical powering nano-generator based on aluminum doped ZnO thin films

Muñoz Aguirre N., Rivera López J.E., Martínez Pérez L., Tamayo Meza P., Instituto Politecnico Nacional, MX

Conductive Atomic Force Microscopy (c-AFM) [1][2] characterization was made on Aluminum doped ZnO thin films. Furthermore, to the electrical resistance associated to the surface of the film, was in series connected a load resistance as [...]

Fracture of a 08KP Steel in Nano-Fragmented State

Yermishkin V.A., Tamayo M.P., Muñoz Aguirre N., Instituto Politecnico Nacional, MX

The evaluation of the resistance to the fracture toughness of metals and metal composites that work in the plastic regime require of the using of highly complex experimental methods and analysis which are not at [...]

Improving the structural characterization of supported on glass gold nanoparticles using Atomic Force Microscopy at vacuum

Muñoz Aguirre N., Rivera López J.E., Martínez Pérez L., Tamayo Meza P., Instituto Politecnico Nacional, MX

Surface characteristics of gold nanoparticles [1] at ambient conditions and in vacuum of the order of 10-4 Torr are compared using Atomic Force Microscopy topographic images in tapping mode. Figure 1 shows the improvement of [...]

Synthesis and Characterization of Nanocrystalline Tin Powder by Reactive Milling

Lara J.O., Ramírez H.B., Instituto Politecnico Nacional, MX

TiN powder was obtained by reaction milling of a titanium powder in air. The Ti powder was milled in an attrition mill or a Spex mill. Characterization of the powders was carried out by means [...]

Synthesis of Nanostructures from Carbides Sheets

Diaz Barriga Arceo L., Garibay Febles V., Orozco E., Zeifert B., Palacios Gonzalez E., German C.R.Sr., Rios-Guerrero L., Leyte Guerrero F., Instituto Politecnico Nacional, MX

Nanotubes and nanoparticles were obtained from a lamellar solid phase using a two step method: mechanical alloying (MA) and heat treatment. MA was used to prepare the monometallic carbide and the bimetallic carbides by milling [...]