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Boersma, A. (author), Grigoriadi, K. (author), Nooijens, M.G.A. (author), Henke, S. (author), Kooter, I.M. (author), Parker, L.A. (author), Dortmans, A. (author), Urbanus, J.H. (author)The presence of microplastics in environmental compartments is generally recognized as a (potential) health risk. Many papers have been published on the abundance of microplastics at various locations around the globe, but only limited knowledge is available on possible mitigation routes. One of the mitigation routes is based on the choice of...article 2023
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Urbanus, J.H. (author), Brunner, A. (author), Boersma, A. (author), Henke, S. (author), Kooter, I. (author), Lensen, S. (author), Parler, L. (author), Schwarz, A. (author), Imhof, P. (author), Dortmans, A. (author), Wijngaard, M. (author)Microplastics are man-made (anthropogenic), persistent, ubiquitous, and potentially harmful. According to the precautionary principle, we must minimise exposure to them.report 2022
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Nuñez, J. (author), Boersma, A. (author), Grand, J. (author), Mintova, S. (author), Sciacca, B. (author)Infrared absorption spectroscopy is a powerful analytical tool that enables the identification of molecular species. The sensitivity of this technique, that is strongly limited by the small absorption cross-section of molecular vibration, can be greatly improved by resonant interaction with nano-antennas via the surface-enhanced infrared...article 2021
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Nunez, J. (author), Koldeweij, R. (author), Trimboli, J. (author), Boersma, A. (author)In this work, a particulate matter (PM) sensor based on infrared spectroscopy is presented and evaluated for its use in occupational exposure. The technology is able to chemically identify the components of aerosols and provide quantitative information about the presence of crystalline silica, which is widely considered to be a health concern at...conference paper 2021
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Blokland, H. (author), Sweelssen, J. (author), Isaac, T. (author), Boersma, A. (author)The first applications of hydrogen in a natural gas grid will be the admixing of low concentrations in an existing distribution grid. For easy quality and process control, it is essential to monitor the hydrogen concentration in real time, preferably using cost effective monitoring solutions. In this paper, we introduce the use of a platinum...article 2021
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Nunez, J. (author), Wang, Y. (author), Bäumer, S.M.B. (author), Boersma, A. (author)The health and environmental effects of particulate matter (PM) in the air depend on several parameters. Besides particle size, shape, and concentration, the chemical nature of the PM is also of great importance. State-of-the-art PM sensors only detect the particle size and concentration. Small, low-cost sensors only identify PM according to PM2...article 2020
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Sweelssen, J. (author), Blokland, H. (author), Rajamaki, T. (author), Boersma, A. (author)Liquid Natural Gas (LNG) is an energy source that is becoming more important in energy transition, as the world is facing lower the CO2 emissions and backup sources for wind and solar energy are needed. LNG is becoming a major player not only as fuel for power plants, but also in transport and mobility. However, the composition of LNG varies...article 2020
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Sweelssen, J. (author), Blokland, H. (author), Rajamäki, T. (author), Sarjonen, R. (author), Boersma, A. (author)The energy market is facing a major transition, in which natural gas and renewable gasses will play an important role. However, changing gas sources and compositions will force the gas transporters, gas engine manufacturers, and gas grid operators to monitor the gas quality in a more intensive way. This leads to the need for lower cost, smaller,...article 2020
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Boersma, A. (author), Wang, Y. (author), Bäumer, S.M.B. (author), Lucas, P. (author), Willekers, R.W. (author), Halpin, A. (author), Gomez Rivas, J. (author), Hendriks, N. (author), den Toonder, J. (author)Stimulated Emission Depletion (STED)lithography is generally recognized as a very promising tool to overcome the Abbe diffraction limit and manufacture 3D submicron features using a mask-less lithography step. It has been shown to be able to create 100 nm resolution, 10 nm feature size features in a polymer resin. However, STED is not widely...other 2019
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- Sciacca, B. (author), Boersma, A. (author) conference paper 2018
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Snelders, D.J.M. (author), Valega Mackenzie, F.O. (author), Boersma, A. (author), Peeters, R.H.M. (author)Important progress has been made towards the expanding of the limits of applicability of Fiber Bragg Grating (FBG) optical sensors. The development of new inorganic coatings consisting of MFI zeolite crystals (silicalite and ZSM-5) has opened up the possibility towards the use of this technology at high temperatures and pressures. Using two...article 2016
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Boersma, A. (author), Cremers, R. (author), Jansen, R. (author)The functionalization of optical fibers containing Fiber Bragg Gratings is a very interesting approach in the development of distributed chemical sensors. We have shown a large variety of coatings, ranging from polymers to ceramics as responsive layers for the detection of many chemical species. Some coated fibers can be applied in extreme...conference paper 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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Boersma, A. (author), Sweelsen, J. (author), Blokland, H. (author)The calorific value of energetic gasses is an important parameter in the quality assessment of gas steams, and can be calculated from the chemical composition of the gas. An array of capacitive sensor electrodes was developed, each functionalized with a gas responsive coating to measure the concentration of methane, ethane, propane, carbon...conference paper 2016
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Justice, J. (author), Khan, U. (author), Korhonen, T. (author), Boersma, A. (author), Wiegersma, S. (author), Karppinen, M. (author), Corbett, B. (author)In the Information and Communications Technology (ICT) sector, the demands on bandwidth continually grow due to increased microprocessor performance and the need to access ever increasing amounts of stored data. The introduction of optical data transmission (e.g. glass fiber) to replace electronic transmission (e.g. copper wire) has alleviated...conference paper 2015
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Khan, M.U. (author), Justice, J. (author), Petäjä, J. (author), Korhonen, T. (author), Boersma, A. (author), Wiegersma, S. (author), Karppinen, M. (author), Corbett, B. (author)Single and multi-layer passive optical interconnects using single mode polymer waveguides are demonstrated using UV nano-imprint lithography. The fabrication tolerances associated with imprint lithography are investigated and we show a way to experimentally quantify a small variation in index contrast between core and cladding of fabricated...article 2015
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Karppinen, M. (author), Salminen, N. (author), Korhonen, T. (author), Alajoki, T. (author), Petäjä, J. (author), Bosman, E. (author), van Steenberge, G. (author), Justice, J. (author), Khan, U. (author), Corbett, B. (author), Boersma, A. (author)Polymer-based integrated optics is attractive for inter-chip optical interconnection applications, for instance, for coupling photonic devices to fibers in high density packaging. In such a hybrid integration scheme, a key challenge is to achieve efficient optical coupling between the photonic chips and waveguides. With the single-mode polymer...conference paper 2015
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Boersma, A. (author), van Ee, R.J. (author), Stevens, R.S.A. (author), Saalmink, M. (author), Charlton, M.D.B. (author), Pollard, M.E. (author), Chen, R. (author), Kontturi, V. (author), Karioja, P. (author), Alajoki, T. (author)This paper describes experimental measurement results for photonic crystal sensor devices which have been functionalized for gas sensing applications. The sensor consists of a two dimensional photonic crystal etched into a slab waveguide having a refractive index of 1.7-1.9. Test devices were fabricated from SiON material on silicon/ silicon...conference paper 2014
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Karioja, P. (author), Hiltunen, J. (author), Aikio, S.M. (author), Alajoki, T. (author), Tuominen, J. (author), Hiltunen, M. (author), Siitonen, S. (author), Kontturi, V. (author), Böhlen, K. (author), Hauser, R. (author), Charlton, M. (author), Boersma, A. (author), Lieberzeit, P. (author), Felder, T. (author), Eustace, D. (author), Haskal, E. (author)Polymers have become an important material group in fabricating discrete photonic components and integrated optical devices. This is due to their good properties: high optical transmittance, versatile processability at relative low temperatures and potential for low-cost production. Recently, nanoimprinting or nanoimprint lithography (NIL) has...conference paper 2014
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Khan, M.U. (author), Justice, J. (author), Boersma, A. (author), Mourad, M. (author), van Ee, R.J. (author), van Blaaderen, A. (author), Wijnhoven, J. (author), Corbett, B. (author)We present designs for sharp bends in polymer waveguides using colloidal photonic crystal (PhC) structures. Both silica (SiO2) sphere based colloidal PhC and core-shell colloidal PhC structures having a titania (TiO 2) core inside silica (SiO2) shells are simulated. The simulation results show that core-shell Face Centered Cubic (FCC) colloidal...conference paper 2014
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