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Quiros Solano, W.F. (author), Gaio, N. (author), Silvestri, C. (author), Pandraud, G. (author), Sarro, Pasqualina M (author)Sensing and stimulating microstructures are necessary to develop more specialized and highly accurate Organ-on-Chip (OOC) platforms. In this paper, we present the integration of a conductive polymer, poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), on a stretchable membrane, core element of an Heart-on-Chip. The electrical...journal article 2016
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Borrielli, A. (author), Pontin, A. (author), Cataliotti, F.S. (author), Marconi, L. (author), Marin, F. (author), Marino, F. (author), Pandraud, G. (author), Prodi, G.A. (author), Serra, E. (author), Bonaldi, M. (author)We present an oscillating micromirror with mechanical quality factors Q up to 1.2×106 at cryogenic temperature and optical losses lower than 20 ppm. The device is specifically designed to ease the detection of ponderomotive squeezing (or, more generally, to produce a cavity quantum optomechanical system) at frequencies of about 100 kHz. The...journal article 2015
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Tran, A.T. (author), Pandraud, G. (author), Tichelaar, F.D. (author), Nguyen, M.D. (author), Schellevis, H. (author), Sarro, P.M. (author)The structure of AlN layers grown on Ti with and without an AlN interlayer between the Si substrate and the Ti layer is investigated. The AlN grains take over the orientation of the Ti columnar grains in both cases. Surprisingly, the Ti grains do not take over completely the orientations of the AlN grains of the interlayer, and show the same...journal article 2013
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Huang, Y. (author), Pandraud, G. (author), Sarro, P.M. (author)TiO2 is an interesting and promising material for micro-/nanoelectromechanical systems (MEMS/NEMS). For high performance and reliable MEMS/NEMS, optimization of the optical characteristics, mechanical stress, and especially surface smoothness of TiO2 is required. To overcome the roughness issue of the TiO2 films due to crystallization during...journal article 2012
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Pandraud, G. (author), Margallo-Balbas, E. (author), Sarro, P.M. (author)We have studied, for the first time, the sensing capabilities of plasma-enhanced chemical vapor deposition (PECVD) SiC-SiO2-SiC horizontal slot waveguides. Optical propagation losses were measured to be 23.9 dB?cm for the quasi-transverse magnetic mode. To assess the potential of this device as a sensor, we simulated the confinement factor in...journal article 2012
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Tran, A.T. (author), Pandraud, G. (author), Schellevis, H. (author), Sarro, P.M. (author)Actuation enhancement for AlN piezoelectric cantilevers is achieved by coating slender AlN beams with a thin PECVD silicon nitride (SiN) layer. Very good linearity and high deflection, up to 19 nm/V of actuation deflection for 200 ?m long cantilevers, at quasi-static mode, is obtained for a 500 nm SiN top layer. This value is three times larger...journal article 2012
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Huang, Y. (author), Pandraud, G. (author), Sarro, P.M. (author)We propose and experimentally demonstrate a reflectance-based photonic crystal (PC) liquid sensor. The PC is made of two-dimensional TiO2 nanopillar arrays. Such a reflectance-based structure with large functional area not only simplifies the optical guiding but also enhances the sensor signal. A linear shift of reflectance peaks is found for...journal article 2012
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Pandraud, G. (author), Purniawan, A. (author), Margallo-Balbás, E. (author), Sarro, P.M. (author)We fabricated horizontal slot waveguides using two low temperature deposition techniques ensuring the full compatibility of the processes with CMOS technology. Slots width as thin as 45 nm with smooth slot surfaces can easily be fabricated with simple photolithographic steps. Fundamental TM-like slot mode in which the E-field is greatly enhanced...conference paper 2012
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- Purniawan, A. (author), Pandraud, G. (author), Vakalopoulos, K.A. (author), French, P.J. (author), Sarro, P.M. (author) conference paper 2012
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Alan, T. (author), Yokosawa, T. (author), Gaspar, J. (author), Pandraud, G. (author), Paul, O. (author), Creemer, F. (author), Sarro, P.M. (author), Zandbergen, H.W. (author)Transmission electron microscopy (TEM) of (de-)hydrogenation reactions is crucial to characterize efficiency of hydrogen storage materials. The nanoreactor, a micromachined channel with 15-nm-thick windows, effectively confines the gas flow to an electron-transparent chamber during TEM of reactions. Realistic experiments require very high...journal article 2012
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Song, B. (author), Schneider, G.F. (author), Xu, Q. (author), Pandraud, G. (author), Dekker, C. (author), Zandbergen, H. (author)Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.journal article 2011
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Yokosawa, T. (author), Alan, T. (author), Pandraud, G. (author), Dam, B. (author), Zandbergen, H.W. (author)Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.journal article 2011
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Tran, A.T. (author), Pandraud, G. (author), Schellevis, H. (author), Alan, T. (author), Aravindh, V. (author), Wunnicke, O. (author), Sarro, P.M. (author)Very thin piezoelectric cantilevers based on AlN layers using titanium Ti thin film electrodes are fabricated and characterized. By optimizing the Ti sputtering parameters, a very low stress (156 MPa) layers stack with high crystallinity and strong (002) orientation of the AlN films is obtained. Finally, a simple fabrication process, fully CMOS...journal article 2011
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Huang, Y. (author), Pandraud, G. (author), Sarro, P.M. (author)A promising concept for a photonic crystal sensor for liquid sensing applications is introduced. The two dimensional photonic crystals are fabricated using a recently developed Atomic layer deposition ARrays Defined by Etch-back technique (AARDE) to obtain large functional surfaces and dense pillar arrays. Photonic signals are collected by means...journal article 2011
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Creemer, J.F. (author), Pandraud, G. (author), Santagata, F. (author)The invention relates to a method of manufacturing a micro unit for use in a microscope. The method comprises the step of providing a planar substrate supporting structure and creating a chamber in the supporting structure for receiving a fluid containing a chemically reacting substance to be inspected. Further, the method comprises the step of...patent 2011
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Margallo-Balbás, E. (author), Geljon, M. (author), Pandraud, G. (author), French, P.J. (author)The scanning delay line is a key component of time-domain optical coherence tomography systems. It has evolved since its inception toward higher scan rates and simpler implementation. However, existing approaches still suffer from drawbacks in terms of size, cost, and complexity, and they are not suitable for implementation using integrated...journal article 2010
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Pandraud, G. (author), Margallo-Balbás, E. (author), Sarro, P.M. (author)Optical Coherence Tomography (OCT) has found applications in many fields of medicine and has a large potential for the optical biopsy of tumors. One of the technological challenges impairing faster adoption of OCT is the relative complexity of the optical instrumentation required, which translates into expensive and bulky setups. In this paper...conference paper 2010
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Jardinier, E. (author), Pandraud, G. (author), Pham, M.H. (author), French, P.J. (author), Sarro, P.M. (author)A photonic crystal waveguide biosensor in the visible is presented for biosensing. The sensor is applied to Refractive Index (RI) measurements. The sensitivity at different wavelength is presented for both air holes and air core configurations of photonic crystal waveguide (PCW) made of TiO2. It is shown that by using Atomic Layer Deposition ...journal article 2009
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Margallo-Balbas, E. (author), Pandraud, G. (author), French, P.J. (author)Optical Coherence Tomography (OCT) is a powerful medical imaging technology. Its ability to non-invasively probe tissues in depth with high resolution has lead to applications in many fields of medicine, with a large potential for surgical guidance. One of the technological challenges impairing faster adoption of OCT is the relative complexity...conference paper 2007
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- Jiang, L. (author), Pandraud, G. (author), French, P.J. (author), Spearing, S.M. (author), Kraft, M. (author) journal article 2007