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Título: | Nanomechanical Sensing for Mass Flow Control in Nanowire-Based Open Nanofluidic Systems |
Autor: | Escobar, Javier Enrique CSIC; Molina Fernández, Juan CSIC ORCID; Gil-Santos, Eduardo CSIC ORCID; Ruz Martínez, José Jaime CSIC ORCID; Malvar, Óscar CSIC ORCID; Kosaka, Priscila M. CSIC ORCID ; Tamayo de Miguel, Francisco Javier CSIC ORCID; San Paulo, Álvaro CSIC ORCID; Calleja, Montserrat CSIC ORCID | Palabras clave: | Semiconductor nanowires Silicon nanowires Nanoelectromechanical systems (NEMS) Nanomechanical resonators Nanofluidics Open fluidics Ionic liquids |
Fecha de publicación: | 30-oct-2023 | Editor: | American Chemical Society | Citación: | ACS Nano 17(21): 21044–21055 (2023) | Resumen: | Open nanofluidic systems, where liquids flow along the outer surface of nanoscale structures, provide otherwise unfeasible capabilities for extremely miniaturized liquid handling applications. A critical step toward fully functional applications is to obtain quantitative mass flow control. We demonstrate the application of nanomechanical sensing for this purpose by integrating voltage-driven liquid flow along nanowire open channels with mass detection based on flexural resonators. This approach is validated by assembling the nanowires with microcantilever resonators, enabling high-precision control of larger flows, and by using the nanowires as resonators themselves, allowing extremely small liquid volume handling. Both implementations are demonstrated by characterizing voltage-driven flow of ionic liquids along the surface of the nanowires. We find a voltage range where mass flow rate follows a nonlinear monotonic increase, establishing a steady flow regime for which we show mass flow control at rates from below 1 ag/s to above 100 fg/s and precise liquid handling down to the zeptoliter scale. The observed behavior of mass flow rate is consistent with a voltage-induced transition from static wetting to dynamic spreading as the mechanism underlying liquid transport along the nanowires. | Versión del editor: | https://doi.org/10.1021/acsnano.3c04020 | URI: | http://hdl.handle.net/10261/343952 | DOI: | 10.1021/acsnano.3c04020 | ISSN: | 1936-0851 | E-ISSN: | 1936-086X |
Aparece en las colecciones: | (IMN-CNM) Artículos |
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