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| Author(s): |
Leonardo Marchiori
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Araraquara. 2021-03-02. |
| Institution: | Universidade Estadual Paulista (Unesp). Instituto de Química. Araraquara |
| Defense date: | 2021-02-04 |
| Advisor: | Sidney José Lima Ribeiro |
| Abstract | |
During century XXI first two decades, motor’s development research was facing technological challenges, such as miniaturization, scalability, materials synergy, and movement control. Inspired by those challenges and based on materials’ physicochemical properties, the goal of this project was the development of micromotors by means of simple manufacture aimed improve the synergism between the utilized materials via optimization studies. Different micromotors geometries have been studied, such as conical, pyramidal, trident, and 2D. For conical micromotors, the height was fixed at 600 μm while the base diameter shifted from 300 μm to 1 mm. The Reynolds’ number (Re) and the drag force (Fd) were the features mostly affected by the micromotors’ geometries changes, and the outcome led to conical motors to present the smaller values. The micromotors were manufactured using acrylic resin and platinum thin films, and their movement was analyzed in aqueous media containing hydrogen peroxide, ranging from 2,5% (v/v) to 30% (v/v), and Triton X-100 surfactant, ranging from 0,01% (v/v) to 8% (v/v). The optimization studies led to the best movement condition, which was 15% (v/v) hydrogen peroxide and 0,2% (v/v) Triton X-100, and during this optimization we observed the micromotors speed increase according to time, such increase could be showed by the 5% and 10% hydrogen peroxide, that after 20 minutes of reaction, reached an average velocity of 2,5 mm.s-1 and 5,0 mm.s-1 respectively. All the data were generated and analyzed via “Nikon – Elements AR 3.2” software. Therefore, we showed that optimization studies of micromotors, which consider geometry, materials synergy, and fuel concentration are substantial to key advances in the state-of-the-art to synthetic micromachines production. The results presented here gives perspective into micromotors applications, as standard models, to future employment of these micromachines in in vivo studies or environmental remediation for example. (AU) | |
| FAPESP's process: | 18/20439-0 - Titanium dioxide based micromotors: applied to the removal of emerging contaminants |
| Grantee: | Leonardo Marchiori |
| Support Opportunities: | Scholarships in Brazil - Master |