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Faiyas, A.P.A. (author), Erich, S.J.F. (author), Huinink, H.P. (author), Adan, O.C.G. (author)This article presents an experimental investigation on transport of methylhydroxyethylcellulose (MHEC) during drying of a model porous material. Nuclear magnetic resonance imaging and thermogravimetric analysis are used to measure water and MHEC transport, respectively. MHEC is added to glue mortars to increase open time, i.e., the time period...article 2017
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van der Heijden, A.E.D.M. (author), Bouma, R.H.B. (author)The influence of an explosion-driven deformation on the defect structure in RDX crystals embedded in a polymer-bonded explosive was investigated by means of confocal scanning laser microscopy. The images were compared to the defect structure in the as-received RDX grades, embeddedarticle 2016
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Shaji Karapuzha, A. (author), van der Zwaag, S. (author), Groen, W.A. (author)Modern flexible and sensitive sensors based on polymer–ceramic composites employ lead zirconate titanate (PZT) granulates having the morphotropic phase boundary (MPB) composition as the piezo active ingredient, as this composition gives the best properties in fully ceramic piezoelectric sensors. In this study, the possibility of using PZT...article 2016
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Torricelli, F. (author), Ghittorelli, M. (author), Smits, E.C.P. (author), Roelofs, C.W.S. (author), Janssen, R.A.J. (author), Gelinck, G.H. (author), Kovács-Vajna, Z.M. (author), Cantatore, E. (author)Ambipolar transistors typically suffer from large off-current inherently due to ambipolar conduction. Using a tri-gate transistor it is shown that it is possible to electrostatically switch ambipolar polymer transistors from ambipolar to unipolar mode. In unipolar mode, symmetric characteristics with an on/off current ratio of larger than 105...article 2016
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Bosman, E. (author), van Steenberge, G. (author), Boersma, A. (author), Wiegersma, S. (author), Harmsma, P.J. (author), Karppinen, M. (author), Korhonen, T. (author), Offrein, B.J. (author), Dangel, R. (author), Daly, A. (author), Ortsiefer, M. (author), Justice, J. (author), Corbett, B. (author), Dorrestein, S. (author), Duis, J. (author)A novel method for fabricating a single mode optical interconnection platform is presented. The method comprises the miniaturized assembly of optoelectronic single dies, the scalable fabrication of polymer single mode waveguides and the coupling to glass fiber arrays providing the I/O's. The low cost approach for the polymer waveguide...conference paper 2016
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Pilet, N. (author), Khikhlovskyi, V. (author), van Breemen, A.J.J.M. (author), Michels, J.J. (author), Kemerink, M. (author), Gelinck, G. (author), Warnicke, P. (author), Bernard, L. (author)Organic electronics is becoming more and more important because the low level of fabrication and deposition complexity even at large scale makes it a good candidate for future low cost technological product development. P(VDF-TrFE) is a co-polymer of special interest due its ferroelectric property enabling usage in re-programmable non-volatile...article 2016
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Bouma, R.H.B. (author), van der Heijden, A.E.D.M. (author)An explosive composition, derived from AFX-757, was systematically varied by using three different qualities of Class I RDX. The effect of internal defect structure of the RDX crystal on the shock sensitivity of a polymer bonded explosive is generally accepted (Doherty and Watt, 2008). Here the response to a mechanical non-shock stimulus is...article 2016
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Lee, J. (author), Roelofs, W.S.C. (author), Janssen, R.A.J. (author), Gelinck, G.H. (author)The spatial charge distribution in diketopyrrolopyrrole-containing ambipolar polymeric semiconductors embedded in dual-gate field-effect transistors (DGFETs) was investigated. The DGFETs have identical active channel layers but two different channel/gate interfaces, with a CYTOP™ organic dielectric layer for the top-gate and an...article 2016
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Lenz, T. (author), Sharifi Dehsari, H. (author), Asadi, K. (author), Blom, P.W.M. (author), Groen, W.A. (author), de Leeuw, D.M. (author)We demonstrate that ferroelectric memory diodes can be utilized as switching type positive temperature coefficient (PTC) thermistors. The diode consists of a phase separated blend of a ferroelectric and a semiconducting polymer stacked between two electrodes. The current through the semiconducting polymer depends on the ferroelectric...article 2016
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Fan, J.T. (author), Weerheijm, J. (author), Sluys, L.J. (author)Multiple-particles-polymer systems of a polyurethane elastomeric matrix embedding 25wt.% and 50wt.% 0.5 mm-diameter PMMA particles were investigated using a split Hopkinson pressure bar (SHPB) setup for revealing the dynamic compressive mechanical response. Taking the 25wt.%-particles-polymer system as a reference case, the characteristics of...article 2016
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Polino, G. (author), Shanmugam, S. (author), Bex, G.J.P. (author), Abbel, R.J. (author), Brunetti, F. (author), Di Carlo, A. (author), Andriessen, H.A.J.M. (author), Galagan, Y.O. (author)A study of the photonic flash sintering of a silver nanoparticle ink printed as the back electrode for organic solar cells is presented. A number of sintering settings with different intensities and pulse durations have been tested on both full-area and grid-based silver electrodes, using the complete emission spectrum of the flash lamps from UV...article 2016
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Kroeze, R.J. (author), Smit, T.H. (author), Vergroesen, P.P. (author), Bank, R.A. (author), Stoop, R. (author), van Rietbergen, B. (author), van Royen, B.J. (author), Helder, M.N. (author)PURPOSE: To assess the feasibility of a one-step surgical concept, employing adipose stem cells (ASCs) and a novel degradable radiolucent cage filler (poly-L-lactide-co-caprolactone; PLCL), within polyetheretherketone cages in a stand-alone caprine spinal fusion model. METHODS: A double-level fusion study was performed in 36 goats. Four cage...article 2015
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Fan, J.T. (author), Weerheijm, J. (author), Sluys, L.J. (author)The dynamic mechanical behaviour of a soft polymer material (Clear Flex 75) was studied using a split Hopkinson pressure bar (SHPB) apparatus. Mechanical properties have been determined at moderate to high strain rates. Real time deformation and fracture were recorded using a high-speed camera. Fracture micrographs were examined to explore the...article 2015
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Koster, S. (author), Leeman, W.R. (author), Verheij, E.R. (author), Dutman, A.E. (author), van Stee, L.L.P. (author), Munch Nielsen, L. (author), Ronsmans, S. (author), Noteborn, H. (author), Krul, L. (author)A main challenge in food safety research is to demonstrate that processing of foodstuffs does not lead to the formation of substances for which the safety upon consumption might be questioned. This is especially so since food is a complex matrix in which the analytical detection of substances, and consequent risk assessment thereof, is difficult...article 2015
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Weerheijm, J. (author), Roebroeks, G. (author), Krabbenborg, D. (author), Agar Ozbek, A.S. (author)A special porous concrete has been developed by the Delft University in collaboration with TNO. The concrete has a static compressive strength of 45 MPa. It fragments at impact into small size debris relative to reference concrete. The porous concrete was developed at laboratory scale and tested at small scale. In collaboration with the Military...conference paper 2015
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Coope, T.S. (author), Luterbacher, R. (author), Turkenburg, D.H. (author), Fischer, H.R. (author), Bond, I.P. (author)Realising self-healing composites in a commercial environment remains a challenge for the transport sector. Herein, this research considers the design envelope and the implications of embedding self-healing agents into commercially relevant fibre reinforced polymer (FRP) composite applications. A novel epoxy resin containing reversible bondable...conference paper 2015
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Patil, B.R. (author), Shanmugam, S. (author), Teunissen, J.P. (author), Galagan, Y. (author)All-solution processed organic solar cells with inverted device architecture were demonstrated. Devices contain opaque bottom electrodes and semitransparent top electrodes, resulting in top illuminated devices. Nanoparticles-based Ag ink was used for inkjet printing both top and bottom electrodes. Semi-transparent top electrode consists of high...article 2015
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Oostra, A.J. (author), Blom, P.W.M. (author), Michels, J.J. (author)Defects occurring during printing of the photoactive layer in organic solar cells lead to short-circuits due to direct contact between the PEDOT:PSS anode and metallic cathode. We provide a highly effective repair method where the defected zone with bare PEDOT:PSS is treated with aqueous sodium hypochlorite to locally disrupt the conductivity of...article 2015
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Owens, C. (author), Ferguson, G.M. (author), Hermenau, M. (author), Voroshazi, E. (author), Galagan, Y. (author), Zimmermann, B. (author), Rösch, R. (author), Angmo, D. (author), Teran-Escobar, G. (author), Uhrich, C. (author), Andriessen, R. (author), Hoppe, H. (author), Würfel, U. (author), Lira-Cantu, M. (author), Krebs, F.C. (author), Tanenbaum, D.M. (author)We report on the degradation of organic photovoltaic (OPV) cells in both indoor and outdoor environments. Eight different research groups contributed state of the art OPV cells to be studied at Pomona College. Power conversion efficiency and fill factor were determined from IV curves collected at regular intervals over six to eight months....article 2015
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Fan, J.T. (author), Weerheijm, J. (author), Sluys, L.J. (author)The dynamic tensile mechanical response of a soft polymer material (Clear Flex 75) is investigated using a split Hopkinson tension bar (SHTB). Stress-strain relations are derived to reveal the mechanical properties at moderate and high strain rates. These relations appear to be rate dependent. Under static loading, the polymer exhibits an...article 2015