Labmade Metallizer: Deposition of Aluminum Film on Glass Substrate and Subsequent Anodization to obtain Aluminum Oxide

In this work, the assembly of a low-cost metallizer is presented, based on physical vapor deposition, to obtain metallic aluminum film deposited over a glass substrate. Later, the Al film is anodized and converted into a porous nanostructured oxide film. The metallic film thickness was measured by profilometry, and the sample position inside the chamber was evaluated. Samples positioned at the center of the sample holder showed considerable thickness and best homogeneity compared to those samples positioned at the edges of the sample holder. A thick metallic film of Al (6 to 7 µm) was deposited over the glass substrate for subsequent anodizing treatment. Mild anodization allowed the total conversion of metallic Al after 7000 s, producing a transparent anodic aluminum oxide (AAO) film adhered to the glass substrate. The AAO morphology was investigated by SEM. Some factors have been listed to describe the low regularity and homogeneity of nanopores in the outer layer of AAO, such as internal defects, compaction of deposited Al film layers and the glass substrate roughness.

Isomerization of Methyl-Eugenol catalyzed by [RuCl2(PPh3)3] In CO2 Atmosphere At Different Temperatures

Dichlorotristriphenylphosphinerruthenium(II) complex was used as initiator in isomerization reactions of methyl-eugenol to iso-methyl-eugenol, under controlled atmosphere. The reactions were performed for 24 h in CO2 atmosphere as an oxygen-free atmosphere alternative system, at temperatures of 25, 50 and 75 °C, with a catalyst/substrate ratio of 1: 100 mol. At the end of each experiment, an aliquot of the reaction mixture was removed and analyzed by GC-MS. Approximately 85 % conversion and 75 % selectivity were observed when the experiments were carried out at 50 °C.