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Título: | A polymeric chip for micromanipulation and particle sorting by ultrasounds based on a multilayer configuration |
Autor: | González Gómez, Icíar CSIC ORCID; Fernández Ledesma, Luis José; Gómez, Tomás Enrique; Berganzo Ruiz, Javier; Soto Martínez, José Luis; Carrato, Alfredo | Palabras clave: | Ultrasonic-lab-on-chip Actuators Mass transfer Microfluidics Sorting Separation |
Fecha de publicación: | 29-ene-2010 | Editor: | Elsevier | Citación: | Sensors and Actuators B: Chemica 144(1) : 310-317 (2010) | Resumen: | A new polymer microchip is presented in this paper for separation and particle sorting in flowing suspensions. It includes a microchannel where a fluid-sample containing particles flows in parallel with another liquid. The working principle is based on an ultrasonic actuation on the cross-section of the chip, which behaves as a multilayer system. That part of the wave established within the channel includes a node of pressure strategically located within the collector fluid path, where the target particles collected to be extracted from their host sample. The use of a polymer as the constitutive material of the chip, new in this type of devices, allows a channel width somewhat larger than a quarter of a wavelength, which does not fit any of the conventional models but it represents an intermediate situation. The device has been fabricated by standard SU-8 photolithography using PMMA as substrate. In the experiments, polystyrene particles of 20 μm in diameter have been extracted from aqueous suspensions containing 6-μm sized particles by a strategic application of ultrasonic waves. A high efficiency of particle separation, over 95%, at different concentrations and flow rates, prove the feasibility of the device to carry out sorting processes on flowing suspensions. | Versión del editor: | http://dx.doi.org/10.1016/j.snb.2009.10.042 | URI: | http://hdl.handle.net/10261/32181 | DOI: | 10.1016/j.snb.2009.10.042 | ISSN: | 0925-4005 |
Aparece en las colecciones: | (IA) Artículos |
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