| Grant number: | 22/02893-1 |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| Start date: | June 01, 2022 |
| End date: | September 30, 2025 |
| Field of knowledge: | Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry |
| Principal Investigator: | Marco Aurelio Zezzi Arruda |
| Grantee: | Anerise de Barros |
| Host Institution: | Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil |
| Associated research grant: | 18/25207-0 - Nanometallomics applied to soybean cultivation for studying the effects of metal-related nanoparticles, AP.TEM |
Abstract This project aims to synthesize nanoparticles with highly controlled size, morphology and aspect ratio. These nanoparticles will be used to evaluate biological effects on soy plants through metallomic and omics platforms. The two main synthetic routes that will be used in this proposal are metallic silver and copper nanoparticles and, the major challenge of this project is the synthesis of these nanoparticles on a large scale with high chemical stability, i.e., that there is no degradation or oxidation of them over time. In addition, one of the requirements for this application is to establish environmentally friendly synthetic routes, which do not cause biological and environmental damage, impairing plant development, as well as, correlation on the actual effect of the nanoparticles' action. Regarding the synthesis, methods described by AbdElkareem will be employed and optimized for the scale-up in the synthesis of copper nanoparticles. In this regard, the stepwise process for the synthesis will preferably be conducted by continuous flow. Initially, we will use particles with spherical morphology, since, these allow better morphological control and a narrow size distribution. In addition to metallic nanoparticles, the proposal also includes obtaining silica nanoparticles, whose methodology is already established in the group (protocol described in patent BR201105171-A2 [24 - project]). However, new investigations will be carried out in this methodology as the possibility of using the colloidal dispersion, before spray drying. For this, we will have to control the pH with keeping the colloidal dispersion compatible with the appropriate planting conditions. In addition, silica nanoparticles are excellent cation exchangers. Thus, silica nanoparticles containing metal cations - such as Ag+ - can also be prepared and employed in plant cultivation. All synthesized nanoparticles are characterized by Transmission Electron Microscopy (HRTEM) and particle size distribution by Dynamic Light Scattering (DLS). The metallic nanoparticles will also be characterized by UV-Vis for Localized Surface Plasmon Resonance (LSPR) band determination. The concentration of the nanoparticles will be determined by atomic absorption. (AU) | |
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