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You searched for +publisher:"Université Catholique de Louvain" +contributor:("Ballandras, Sylvain"). One record found.

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Université Catholique de Louvain

1. Francis, Laurent. Thin film acoustic waveguides and resonators for gravimetric sensing applications in liquid.

Degree: 2006, Université Catholique de Louvain

The fields of health care and environment control have an increasing demand for sensors able to detect low concentrations of specific molecules in gaseous or liquid samples. The recent introduction of microfabricated devices in these fields gave rise to sensors with attractive properties. A cutting edge technology is based on guided acoustic waves, which are perturbed by events occurring at the nanometer scale. A first part of the thesis investigates the Love mode waveguide, a versatile structure in which a thin film is guiding the acoustic wave generated in a piezoelectric substrate. A systematic analysis of its sensitivity was obtained using a transmission line model generalized to discriminate the rigid or viscous nature of the probed layers. We developed a novel integrated combination of the Love mode device with a Surface Plasmon Resonance optical sensor to quantify the thickness and the composition of soft layers. The electromagnetic interferences in the recorded signal were modeled to determine the phase velocity in the sensing area and to provide new mechanisms for an enhanced sensitivity. The experimental aspects of this work deal with the fabrication, the important issue of the packaging and the sensitivity calibration of the Love mode biosensor. A second part of the thesis investigates nanocrystalline diamond under the form of a thin film membrane suspended to a rigid silicon frame. The high mechanical and chemical resistance of nanocrystalline diamond, close to single-crystal diamond, open ways to membrane based acoustic sensors such as Flexural Plate Wave and thin Film Bulk Acoustic Resonators (FBAR). A novel dynamic characterization of the thin film is reported and the properties of composite FBAR devices including a diamond thin film membrane and a piezoelectric aluminum nitride layer are assessed using the perturbation theory. This study is applied to evaluate the high sensing potential of the first prototype of an actual diamond-based composite FBAR.

(FSA 3) – UCL, 2006

Advisors/Committee Members: UCL - FSA/MAPR - Département des sciences des matériaux et des procédés, Van Hoof, Chris, Campitelli, Andrew, Ballandras, Sylvain, Flandre, Denis, Bertrand, Patrick, Legat, Jean-Didier.

Subjects/Keywords: Gravimetric sensor; Biosensor; Liquid cell; SAW; Packaging; Electromagnetic interference; Thin film characterization; Acoustic waveguide; Acoustic resonator; Love waves; Flexural plate waves; Nanocrystalline diamond; FBAR

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Francis, L. (2006). Thin film acoustic waveguides and resonators for gravimetric sensing applications in liquid. (Thesis). Université Catholique de Louvain. Retrieved from http://hdl.handle.net/2078.1/5180

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Francis, Laurent. “Thin film acoustic waveguides and resonators for gravimetric sensing applications in liquid.” 2006. Thesis, Université Catholique de Louvain. Accessed November 12, 2019. http://hdl.handle.net/2078.1/5180.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Francis, Laurent. “Thin film acoustic waveguides and resonators for gravimetric sensing applications in liquid.” 2006. Web. 12 Nov 2019.

Vancouver:

Francis L. Thin film acoustic waveguides and resonators for gravimetric sensing applications in liquid. [Internet] [Thesis]. Université Catholique de Louvain; 2006. [cited 2019 Nov 12]. Available from: http://hdl.handle.net/2078.1/5180.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Francis L. Thin film acoustic waveguides and resonators for gravimetric sensing applications in liquid. [Thesis]. Université Catholique de Louvain; 2006. Available from: http://hdl.handle.net/2078.1/5180

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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