DEPÓSITO DE MICROESTRUCTURAS DE ZNO CON INCORPORACIÓN DE NANOPARTICULAS DE PLATA PARA SER APLICADO COMO SENSOR DE GASES (DEPOSITION OF ZNO MICROSTRUCTURES WITH INCORPORATION OF SILVER NANOPARTICLES TO BE APPLIED AS A GAS SENSOR)
Resumen
Las microestructuras de óxido de zinc (ZnO) son semiconductores que buscan mejorar las propiedades eléctricas, ópticas y mecánicas. Diferentes métodos han sido empleados para la alteración de su superficie, sin embargo, éstos requieren de procesos complejos y elevados en sus costos. En este trabajo se propone realizar el depósito de microestructuras de óxido de ZnO, para ser incorporadas con nanopartículas de plata (AgNPs) para modificar sus propiedades eléctricas. Esta alteración de la superficie permite potenciales aplicaciones de este material como sensor de gases. Las AgNPs fueron sintetizadas por la técnica de electrolisis e incorporadas en la superficie del semiconductor mediante microaspersión. A través de un sistema de depósito por vapor químico (CVD) se realizó una serie de experimentos utilizando un precursor de zinc en forma de micro traza para la obtención de una película activa. Se midió la resistividad eléctrica de las películas en presencia de atmosfera y presión controladas.
Palabras Clave: Nanopartículas, Plata, Zinc, CVD, Resistividad
Abstract
Zinc oxide (ZnO) microstructures are semiconductors searching to improve electrical, optical, and mechanical properties. Different methods have been used to modify its surface; however, these require complex processes and high costs. In this work, it is proposed to carry out the deposit of ZnO oxide microstructures, to be incorporated with silver nanoparticles (AgNPs) to modify their electrical properties. This alteration of the surface allows potential applications of this material as a gas sensor. The AgNPs were synthesized by the electrolysis technique and incorporated into the semiconductor surface by microsprinkling. Through a chemical vapor deposition (CVD) system, a series of experiments were carried out using a zinc precursor in the form of microtrace to obtain an active film. The electrical resistivity of the films was measured in the presence of a controlled atmosphere and pressure.
Keywords: Nanoparticles, Silver, Zinc, CVD, Resistivity.
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