Carregant...
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Llicència de publicació
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/187843
Ionic Species Affect the Self-Propulsion of Urease-Powered Micromotors
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
Enzyme-powered motors self-propel through the catalysis of in situ bioavailable fuels, which makes them excellent candidates for biomedical applications. However, fundamental issues like their motion in biological fluids and the understanding of the propulsion mechanism are critical aspects to be tackled before a future application in biomedicine. Herein, we investigated the physicochemical effects of ionic species on the self-propulsion of urease-powered micromotors. Results showed that the presence of PBS, NaOH, NaCl, and HEPES reduced self-propulsion of urease-powered micromotors pointing towards ion-dependent mechanisms of motion. We studied the 3D motion of urease micromotors using digital holographic microscopy to rule out any motor-surface interaction as the cause of motion decay when salts are present in the media. In order to protect and minimize the negative effect of ionic species on micromotors' performance, we coated the motors with methoxypolyethylene glycol amine (mPEG) showing higher speed compared to noncoated motors at intermediate ionic concentrations. These results provide new insights into the mechanism of urease-powered micromotors, study the effect of ionic media, and contribute with potential solutions to mitigate the reduction of mobility of enzyme-powered micromotors.
Matèries
Matèries (anglès)
Citació
Citació
ANDRES, Xavier, ARQUÉ, Xavier, MESTRE, Rafael, CIRAULO, Bernard, ORTEGA ARROYO, Jaime, QUIDANT, Romain, PATIÑO, Tania, SANCHEZ ORDOÑEZ, Samuel. Ionic Species Affect the Self-Propulsion of Urease-Powered Micromotors. _Research_. 2020. [consulta: 24 de gener de 2026]. ISSN: 2639-5274. [Disponible a: https://hdl.handle.net/2445/187843]