Charge emissions from Electrosprays in vacuum: mixtures of formamide with methylammonium formate
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866911778760294400 |
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| author | Garoz, David de la Mora, Juan Fernández |
| author_facet | Garoz, David de la Mora, Juan Fernández |
| contents | The charge/mass distribution f(q/m) of nanodrops and ions electrosprayed in vacuum from mixtures of formamide (FM) and methylammonium formate (MAF) is studied by time of flight mass spectrometry at MAF/FM volumetric concentrations of 5%, 10%, 25% and 50%. Positive and negative polarities yield comparable f(q/m) curves, though the negative mode yields ~30% larger currents. On shifting from the highest to the lowest liquid flow rates, at which a cone-jet is stable, the more conducting solutions evolve from mostly drop to primarily ion emission. A purely ionic regime is not reached under any condition, but the drops achieve unusually high q/m. As a result, these sprays have excellent electrical propulsion characteristics, some being able to cover a 25-fold range of average q/m with a propulsive efficiency typically in the range of 80%. Results of formamide electrolytes with formates and nitrates of several other amines are more briefly reported. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_10954 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Charge emissions from Electrosprays in vacuum: mixtures of formamide with methylammonium formate Garoz, David de la Mora, Juan Fernández Chemical Physics The charge/mass distribution f(q/m) of nanodrops and ions electrosprayed in vacuum from mixtures of formamide (FM) and methylammonium formate (MAF) is studied by time of flight mass spectrometry at MAF/FM volumetric concentrations of 5%, 10%, 25% and 50%. Positive and negative polarities yield comparable f(q/m) curves, though the negative mode yields ~30% larger currents. On shifting from the highest to the lowest liquid flow rates, at which a cone-jet is stable, the more conducting solutions evolve from mostly drop to primarily ion emission. A purely ionic regime is not reached under any condition, but the drops achieve unusually high q/m. As a result, these sprays have excellent electrical propulsion characteristics, some being able to cover a 25-fold range of average q/m with a propulsive efficiency typically in the range of 80%. Results of formamide electrolytes with formates and nitrates of several other amines are more briefly reported. |
| title | Charge emissions from Electrosprays in vacuum: mixtures of formamide with methylammonium formate |
| topic | Chemical Physics |
| url | https://arxiv.org/abs/2402.10954 |