Métodos de Deposição de Nanomateriais para análise morfológica usando Microscopia de Força Atômica.

Abstract

Nanotechnology has aroused increasing interest among researchers over the last few years. Nanomaterials can be applied in different areas of science and technology and constantly require researchers to manipulate these nanomaterials and obtain new structures at the atomic level. Graphene oxide (GO) and molybdenum trioxide (MoO3) were the two 2D nanomaterials chosen to be trained, involving different deposition techniques. This must be a difficulty in preparing samples that are suitable for analysis with atomic force microscopy. In this work, drip deposition, two-phase emulsion, nebulization and mechanical micro cleavage techniques were studied for two different types of two-dimensional nanomaterials. The characterization of the materials was carried out using Fourier Transform Infrared Spectroscopy (FTIR), Visible Ultraviolet Spectroscopy (UV-vis) and Scanning Electron Microscopy (SEM). Verification of the arrangement of the deposited nanostructures was carried out using Optical Microscopy (OM) and later using the Atomic Force Microscope (AFM). The factors taken into consideration were: the concentration of the deposited material, the deposition techniques for each material, the deposition time and the temperature. The analysis showed that depending on the material, each deposition technique is better suited, the best technique for reduced graphene oxide (rGO) was two-phase emulsion deposition, in addition, for GO and molybdenum trioxide nanoribbons (NF@MoO3) deposition by mechanical micro cleavage was the most efficient technique.