Presentation Type
Poster
Discipline Track
Other
Chemistry
Abstract Type
Research/Clinical
Abstract
Background: This research aims to synthesize stable silicon nanoparticles using different molar ratios of N-Cyclohexyl-2-pyrrolidone (CHP) and Silicon to demonstrate if there is any significance towards the production of effective nanotubes. To determine this, the synthesized nanoparticles will be characterized by scanning electron microscopy (SEM), UV visible absorption spectroscopy, and photoluminescence spectroscopy (PL).
Methods: 50 Mg of silicon wafer are added with differing ratios of ligand (CHP), 5mL of water, and 3 steel iron balls into a ball milling vial. Vials are then placed into a ball milling apparatus for 7 cycles or 3.5 hours. Once the cycles are complete, the samples are centrifuged and separated into pellet and supernatant. These samples are then dried using a rotary evaporator until a talc powder is formed. The powder can then be analyzed via SEM, UV visible, PL, and more.
Results: Differing concentrations of attached ligand (CHP) to SiNPs demonstrate similar characteristics, however, their absorbance varies. In the pellet samples, broader peaks are seen compared to the supernatant samples, however, there is a slight left shift in the supernatant. Further analysis in photoluminescence spectroscopy demonstrates a possibility of SiNPs residing mostly in the pellet compared to the supernatant. This can be hypothesized by the higher emission ranges for all three pellet samples compared to their supernatants. Along with this, the pellet samples demonstrate an inverse relationship in concentration of ligand (CHP) and their respective emission ranges. Further characterization will be needed to conclude whether these SiNPs will be suitable for their implementation in nanotubes
Conclusions: Further analysis is needed by TEM and possible NMR/FTIR to determine whether the oxygen or nitrogen functional group is reactive. Other ligands such as dimethylformamide, dimethylacetamide, and N-methyl-2-pyrrolidone need to be considered as well and compare their polarities to determine which has the best results.
Academic/Professional Position
Medical Student
Academic/Professional Position (Other)
Chemistry
Recommended Citation
Vanegas, Julie P.; Gutierrez, Yolanda V.; Rivera, Joaquin; and García, Juan Jr., "New Ways to Improve Dispersibility of Nanotubes: Approaching from the Formation of Silicon Nanoparticles by High Energy Reactive Ball Milling (HERBM) in Polar Solvents" (2024). Research Symposium. 51.
https://scholarworks.utrgv.edu/somrs/2024/posters/51
Included in
New Ways to Improve Dispersibility of Nanotubes: Approaching from the Formation of Silicon Nanoparticles by High Energy Reactive Ball Milling (HERBM) in Polar Solvents
Background: This research aims to synthesize stable silicon nanoparticles using different molar ratios of N-Cyclohexyl-2-pyrrolidone (CHP) and Silicon to demonstrate if there is any significance towards the production of effective nanotubes. To determine this, the synthesized nanoparticles will be characterized by scanning electron microscopy (SEM), UV visible absorption spectroscopy, and photoluminescence spectroscopy (PL).
Methods: 50 Mg of silicon wafer are added with differing ratios of ligand (CHP), 5mL of water, and 3 steel iron balls into a ball milling vial. Vials are then placed into a ball milling apparatus for 7 cycles or 3.5 hours. Once the cycles are complete, the samples are centrifuged and separated into pellet and supernatant. These samples are then dried using a rotary evaporator until a talc powder is formed. The powder can then be analyzed via SEM, UV visible, PL, and more.
Results: Differing concentrations of attached ligand (CHP) to SiNPs demonstrate similar characteristics, however, their absorbance varies. In the pellet samples, broader peaks are seen compared to the supernatant samples, however, there is a slight left shift in the supernatant. Further analysis in photoluminescence spectroscopy demonstrates a possibility of SiNPs residing mostly in the pellet compared to the supernatant. This can be hypothesized by the higher emission ranges for all three pellet samples compared to their supernatants. Along with this, the pellet samples demonstrate an inverse relationship in concentration of ligand (CHP) and their respective emission ranges. Further characterization will be needed to conclude whether these SiNPs will be suitable for their implementation in nanotubes
Conclusions: Further analysis is needed by TEM and possible NMR/FTIR to determine whether the oxygen or nitrogen functional group is reactive. Other ligands such as dimethylformamide, dimethylacetamide, and N-methyl-2-pyrrolidone need to be considered as well and compare their polarities to determine which has the best results.