MX – Page 7 – TechConnect Briefs

Antioxidant activity of fullerene C60 against OH free radicals: A Quantum Chemistry and Computational Kinetics Study

Iuga C., Universidad Autónoma Metropolitana, MX

Fullerenes are considered to be the world’s most efficient radical scavenger, and represents an attractive tool for biological applications. Indeed, it have been demonstrated in vivo and in vitro, that fullerenes and related structures reduce [...]

Density Functional Theory calculations of the ferroelectric poly(vinylidene fluoride-trifluoroethylene) and poly(vinylidene fluoride-chlorotrifluoroethylene) copolymers

Cuán A., Cortés-Romero C.M., Wang Q., Noreña L., Universidad Autonoma Metropolitana-Azcapotzalco, MX

The quantum mechanics calculations of the energetic and structures corresponding to the different structural conformations for the poly(vinylidene fluoride-trifluoroethylene) and poly(vinylidene fluoride-chlorotrifluoroethylene) copolymers show that the Tp conformation is energetically stabilized even with a chlorine [...]

Mechanical Reinforcement of Epoxy Resins using Magnetic Aligned Halloysite

Mendoza-Bello S., Barrientos-Ramirez S., Montes de Oca G., Flores-Santos L., Macro-M, S.A. de C.V., MX

In this work we report the synthesis of magnetite nanoparticles using halloysite as template. Halloysite is treated using a two steps activation method (Sn/Pd) and in a third step ferrite is formed using a coprecipitation [...]

Traceability of Polyethylcyanoacrylate nanoparticles through the Startum Corneum

Diaz Torres R., National University of Mexico, MX

We followed nanoparticles through the stratum corneum using tape stripping and the nanoparticles quatification was done using photoluminescence. We found some interesting data at 3 hrs of application of nanoparticles because it seems like nanoparticles [...]

Ozonolysis of Indigo: A ab initio study

Solís Correa H.E., Uc V., Universidad Autonoma Metropolitana-Azcapotzalco, MX

The theoretical investigation of the electronic structure calculations of the indigo have been performed with the system of programs Gaussian03, all geometries have been fully optimized with MP2 method using a 3-21G** basis set. These [...]

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 [...]

Electronic Properties and Transitions States involved in the Pyrrole Oligomerization

Cuán A., Cortés-Romero C.M., Ramírez-Silva M.T., Romero-Romo M.A., Palomar-Pardavé M.E., Metropolitan Autonomous University- Azcapotzalco, MX

The electrochemical pyrrole polymerization mechanism at initial stages is theoretically studied through sequential monomer units coupling to obtain 2 to 9 oligomer formation. The transitions states involved in the initial stages give the sequential growing [...]

Magnetite particle size dependence on the co-precipitation synthesis method for protein separation

Reza R.T., Martínez Pérez C.A., Rodriguez Gonzalez C.A., Baques D.B., García-Casillas P.E., Universidad Autonoma de Ciudad Juarez, MX

Nowadays, magnetic particles are of great interest to different research areas, such as magnetic separation techniques, biotechnology, catalysis, magnetic resonance imaging, magnetic fluids and data storage, among others [1]. The application of magnetic particles involves [...]

Green Chemistry Used in the Synthesis and Characterization of Silver and Gold Nanoparticles

Vallejo R., Segovia P., Elizondo N., Vázquez O., Coello V., Castaño V., Universidad Autonoma de Nuevo Leon, MX

Gold (Au) and silver (Ag) nanoparticles have a diversity of interesting properties between which they emphasize the electrical ones, optical, catalytic and the applications in biomedicine like antibacterial and antiviral, same that depend on their [...]

Synthesis of nanocrystalline (Zn1-xCox)Al2O4 solid solution: structural and optical properties

Fernández-Osorio A., Hernández- Mendoza D., Pineda-Villanueva E., Universidad Nacional Autonoma de Mexico, MX

New inorganic pink pigments based on nanocrystalline (Zn1-xCox)Al2O4 solid solution, were prepared using the hydrothermal method, obtaining nanoparticles below 8 nm. The spinel ZnAl2O4 was chosen as host hue to introduce Co(II) ions, because zinc [...]