Zeolite based microconcentrators for volatile organic compounds sensing at trace-level: fabrication and performance

Almazán, F. (Universidad de Zaragoza) ; Pellejero, I. ; Morales, A. ; Urbiztondo, M.A. (Universidad de Zaragoza) ; Sesé, J. (Universidad de Zaragoza) ; Pina, M.P. (Universidad de Zaragoza) ; Santamaría, J. (Universidad de Zaragoza)

Resumen: A novel 6-step microfabrication process is proposed in this work to prepare microfluidic devices with integrated zeolite layers. In particular, microfabricated preconcentrators designed for volatile organic compounds (VOC) sensing applications are fully described. The main novelty of this work is the integration of the pure siliceous MFI type zeolite (silicalite-1) polycrystalline layer, i.e. 4.0¿¿±¿¿0.5 µm thick, as active phase, within the microfabrication process just before the anodic bonding step. Following this new procedure, Si microdevices with an excellent distribution of the adsorbent material, integrated resistive heaters and Pyrex caps have been obtained. Firstly, the microconcentrator performance has been assessed by means of the normal hexane breakthrough curves as a function of sampling and desorption flowrates, temperature and micropreconcentrator design. In a step further, the best preconcentrator device has been tested in combination with downstream Si based microcantilevers deployed as VOC detectors. Thus, a preliminar evaluation of the improvement on detection sensitivity by silicalite-1 based microconcentrators is presented.

Idioma: Inglés

DOI: 10.1088/0960-1317/26/8/084010

Año: 2016

Publicado en: JOURNAL OF MICROMECHANICS AND MICROENGINEERING 26, 8 (2016), 084010 [12 pp]
ISSN: 0960-1317

Factor impacto JCR: 1.794 (2016)

Categ. JCR: ENGINEERING, ELECTRICAL & ELECTRONIC rank: 122 / 260 = 0.469 (2016) - Q2 - T2
Categ. JCR: INSTRUMENTS & INSTRUMENTATION rank: 24 / 58 = 0.414 (2016) - Q2 - T2
Categ. JCR: PHYSICS, APPLIED rank: 67 / 147 = 0.456 (2016) - Q2 - T2
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 59 / 87 = 0.678 (2016) - Q3 - T3

Factor impacto SCIMAGO: 0.63 - Electrical and Electronic Engineering (Q1) - Nanoscience and Nanotechnology (Q2) - Mechanics of Materials (Q2) - Electronic, Optical and Magnetic Materials (Q2) - Mechanical Engineering (Q2)

Financiación: info:eu-repo/grantAgreement/ES/MICINN/CTQ2013-49068-C2-1-R
Financiación: info:eu-repo/grantAgreement/ES/MICINN/CTQ2013-49068-C2-2-R

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Ingeniería Química (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Tecnologi. Medio Ambiente (Dpto. Ing.Quím.Tecnol.Med.Amb.)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)