TY - CHAP A1 - Gebhardt, Andreas T1 - Technology Diffusion through a Multi-Level Technology Transfer Infrastructure. Contribution to the 1st. All Africa Technology Diffusion Conference Boksburg, South Africa June 12th - 14th 2006 N2 - Table of contents 1. Introduction 2. Multi-level Technology Transfer Infrastructure 2.1 Level 1: University Education – Encourage the Idea of becoming an Entrepreneur 2.2 Level 2: Post Graduate Education – Improve your skills and focus it on a product family. 2.3 Level 3: Birth of a Company – Focus your skills on a product and a market segment. 2.4 Level 4: Ready to stand alone – Set up your own business 2.5 Level 5: Grow to be Strong – Develop your business 2.6 Level 6: Competitive and independent – Stay innovative. 3. Samples 3.1 Sample 1: Laser Processing and Consulting Centre, LBBZ 3.2 Sample 2: Prototyping Centre, CP 4. Funding - Waste money or even lost Money? 5. Conclusion KW - Technologietransfer KW - technology transfer KW - technology diffusion Y1 - 2006 ER - TY - JOUR T1 - Fachblatt, Jahrgang 2006; Nr. 1 N2 - Studienbeiträge Die schwere Geburt des Studienbeitragsgesetzes Forschung Erfindungen für die Praxis Antikensammlung inszeniert in geschwungener Ebenenkonstruktion Doppelt hält besser Studium und Lehre Kreative Höhenflüge im Weinberg von Piemont Nach "Bauhaus Europa" jetzt "Kunsthaus Aachen" Beton - Es kommt drauf an, was man draus macht "Ein Stück Raumfahrtsystem" Film ab im Cinekaree Umstellung auf Bachelor- und Master-Abschlüsse beispielhaft Herausragende architektonische Umsetzung geehrt Erdbeobachtung im Taschenformat Die Hygiene im Handgepäck Eintauchen in die Welt von "sub-ten" Symposium zur 1. Flugmesswoche des FB 6 Personen Konsul mit Zeitungsente Der richtige Mann am richtigen Ort Urlaub fürs Ehrenamt 101 und ziemlich weise Goldene Auszeichnung für die Dekanin Wir feiern heute unsere Eliten Eigene Faszination für den Lehrstoff fesselt Studierende Personalia Horst Rambau: Endstation Selbstständigkeit? Der gute Ruf reicht bis Teheran Alumni "Regen ist gut für unser Geschäft" FH-Studenten aus Jülich in der Wissenschaft erfolgreich Miss und Mister FH 2005 International Vor 20 Jahren begann es! "Heute ist ein guter Tag für die Fachhochschule" Service Bologna ist längst bei den Hochschulen angekommen Auch Lehrer lernen nie aus Was ist eigentlich das Freshman-Year "Zeile für Zeile" T3 - Fachblatt / FH Aachen - 2006, 1 KW - Aachen / Fachhochschule Aachen KW - Fachhochschule Aachen KW - Aachen University of Applied Sciences Y1 - 2006 ER - TY - JOUR A1 - Gebhardt, Andreas T1 - Rapid Manufacturing - eine interdisziplinäre Strategie N2 - Als um 1987 ein Verfahren namens Stereolithographie und ein Stereolithography Apparatus (SLA) vorgestellt wurden, war der Traum von der Herstellung beliebiger dreidimensionaler Bauteile direkt aus Computerdaten und ohne bauteilspezifische Werkzeuge Realität geworden. Ein Anwendungs-Szenario wurde gleich mitgeliefert. Diese Technologie würde es möglich machen, die gesamte Ersatzteilversorgung der Amerikanischen Pazifikflotte mittels ein paar dieser Maschinen, umfangreicher Datenstätze und genügend Rohmaterial vor Ort auf einem Flugzeugträger direkt nach Bedarf zu fertigen. Diese Vorstellung definierte schon damals die direkte digitale Fertigung, das Rapid Manufacturing. In der Realität bestanden die mit diesem Verfahren hergestellten Bauteile nur aus Kunststoff, waren ungenau, bruchempfindlich und klebrig und allein in der Produktentwicklung, eben als Prototypen zu benutzen. Sie waren schnell verfügbar, weil zu Ihrer Herstellung keine Werkzeuge benötigt wurden. Folgerichtige und zudem modern hießen sie: Rapid Prototyping. Rapid Prototyping wurde schnell zum Synonym eines neuen Zweiges der Fertigungstechnik, der Generativen Fertigungstechnik. Die weitere Entwicklung brachte neue Verfahren, höhere Genauigkeiten, verbesserte Werkstoffe und neue Anwendungen. Die Herstellung von Negativen, also Werkzeugen, mit dem gleichen Verfahren wurde marketing-getrieben Rapid Tooling genannt und als die ersten Bauteile nicht mehr als Prototypen, sondern als Endprodukte eingesetzt wurden, nannte man dies Rapid Manufacturing - das Ziel war erreicht. War das Ziel wirklich erreicht? Ist es Rapid Manufacturing, wenn ein generativ gefertigtes Bauteil die gewünschte Spezifikation erreicht? Was muss passieren, damit aus dem Phänomen Rapid Prototyping eine Strategie wird, die geeignet ist, einen Paradigmenwechsel von der heutigen Hersteller-induzierten Massenproduktion von Massenartikeln zur Verbraucher-induzierten (und verantworteten) Massenproduktion von Einzelteilen für jedermann ermöglichen und möglicherweise unsere Arbeits- und Lebensformen tiefgreifend zu beeinflussen? Im Beitrag wird der Begriff der (Fertigungs-) Strategie „Rapid Manufacturing“ näher beleuchtet. Es wird diskutiert, welche Maßnahmen auf der technischen und der operative Ebene getroffen werden müssen, damit die generative Fertigungstechnik im Sinne dieser Strategie umgesetzt werden kann. Beispiele belegen, dass diese Entwicklung bereits begonnen hat und geben Anregungen für eine konstruktive Diskussion auf der RapidTech 2006. N2 - As a process called stereolithography and a stereolithography apparatus (SLA) was presented in 1987, the dream of manufacturing any three-dimensional component directly from computer data and without component-specific tools became reality. An application scenario was supplied at the same time. This technology would make it possible to produce the entire spare parts requirement of the American Pacific Fleet merely through the use of a couple of such machines, extensive datasets and enough raw material on board an aircraft carrier directly as required. This image defined direct digital fabrication, rapid manufacturing, even at that time. In reality, this procedure only managed to produce components in plastic which were imprecise, fragile and sticky and only usable as prototypes in product development. They were rapidly available, because no tools were required for their manufacture. Consequentially, they are now known as Rapid Prototyping in modern jargon. Rapid Prototyping quickly became a synonym for a new branch of production engineering known as generative production engineering. Continued development brought new processes, improved accuracy, improved materials and new applications. The manufacturing of negatives, in other words tools, using the same procedure was quickly named rapid tooling by the marketing sector, and once the first components were used as final products instead of just prototypes the process was renamed "rapid manufacturing" - the goal had been reached. Was the goal really reached? Is it rapid manufacturing if a generatively manufactured component reaches the required specifications? What has to happen so that the rapid prototyping phenomenon becomes a strategy which is suitable for enabling the paradigm change from current manufacture-induced mass production of mass articles to consumer-induced (and consumer-responsible) mass production of single parts for anyone, and in all possibility makes dramatic changes in our way of working and living? The lecture includes detailed information about the (production) strategy term "rapid manufacturing". We will be discussing which measures need to be taken on the technical and operative level so that generative production engineering can be implemented in the sense of this strategy. Examples will show that this development has already started, and should provoke stimulation leading to constructive discussion during RapidTech 2006. KW - Rapid prototyping KW - Rapid Manufacturing KW - Rapid Prototyping KW - Stereolithographie KW - Generative Fertigungstechnik KW - Rapid prototyping KW - rapid manufacturing Y1 - 2006 ER - TY - GEN A1 - Höttges, Jörg A1 - Cordes, Jürgen A1 - Wirtz, Dominika A1 - Moers, Monika A1 - Gehlen, Tanja A1 - Aldenhoven, Frederick T1 - E-Learning Access N2 - Schrittweise Einführung in Access. Nach jedem Abschnitt besteht die Möglichkeit, das neue Wissen direkt anzuwenden. Mit Wissensprüfungen und Übungen nach jedem Kapitel. 1. Grundbegriffe aus der Datenbank 2. Eine Datenbank planen 3. Tabellen erstellen und bearbeiten 4. Abfragen erstellen und bearbeiten 5. Formulare - Tuning für die Daten 6. Berichte - echt einfach KW - ACCESS 2003 KW - ACCESS KW - Relationale Datenbank KW - Access Y1 - 2006 N1 - Zugriff nur über das Intranet der FH Aachen ER - TY - GEN A1 - Höttges, Jörg A1 - Cordes, Jürgen A1 - Wirtz, Dominika A1 - Moers, Monika A1 - Gehlen, Tanja A1 - Aldenhoven, Frederick T1 - E-Learning AutoCAD N2 - Schrittweise Einführung in die Welt des AutoCAD. Nach jedem Abschnitt besteht die Möglichkeit, das neue Wissen direkt anzuwenden. Mit Wissensprüfungen und Übungen nach jedem Kapitel. (Modul wird noch überarbeitet) 1. Der Anfang mit AutoCAD 2. Grundlagen zur Anfertigung einer Zeichnung 3. Layer 4. Texte und Bemaßung 5. Weiterführende Zeichenwerkzeuge 6. Layout und Plotten KW - CAD KW - AutoCAD KW - AutoCAD 2005 KW - AutoCAD Y1 - 2006 N1 - Zugriff nur über das Intranet der FH Aachen ER - TY - CHAP A1 - Bührig-Polaczek, Andreas A1 - Röth, Thilo A1 - Baumeister, E. A1 - Nowack, N. A1 - Süßmann, Torsten T1 - Hybride Leichtbaustrukturen in Stahlblech-Leichtmetall Verbundguss N2 - Stahl-Leichtmetall-Hybride mit hohen Leistungspotentialen können heute wirtschaftlich abgebildet werden und eignen sich möglicherweise auch zum Einsatz in Fahrzeugkarosserien KW - Karosseriebau KW - Verbundguss KW - Stahlblech-Leichtmetall Verbundguss KW - Stahlblech-Leichtmetall-Hybride KW - Lightweight car body construction Y1 - 2006 ER - TY - CHAP A1 - Lei, Yu A1 - Mulchandani, Priti A1 - Chen, Wilfred A1 - Mulchandani, Ashok T1 - Biosensor for direct determination of fenitrothion and EPN using recombinant Pseudomonas putida JS444 with surface expressed organophosphorus hydrolase. 1. modified clark oxygen electrode N2 - This paper reports a first microbial biosensor for rapid and cost-effective determination of organophosphorus pesticides fenitrothion and EPN. The biosensor consisted of recombinant PNP-degrading/oxidizing bacteria Pseudomonas putida JS444 anchoring and displaying organophosphorus hydrolase (OPH) on its cell surface as biological sensing element and a dissolved oxygen electrode as the transducer. Surfaceexpressed OPH catalyzed the hydrolysis of fenitrothion and EPN to release 3-methyl-4-nitrophenol and p-nitrophenol, respectively, which were oxidized by the enzymatic machinery of Pseudomonas putida JS444 to carbon dioxide while consuming oxygen, which was measured and correlated to the concentration of organophosphates. Under the optimum operating conditions, the biosensor was able to measure as low as 277 ppb of fenitrothion and 1.6 ppm of EPN without interference from phenolic compounds and other commonly used pesticides such as carbamate pesticides, triazine herbicides and organophosphate pesticides without nitrophenyl substituent. The applicability of the biosensor to lake water was also demonstrated. KW - Biosensor KW - Organophosphorus KW - fenitrothion KW - EPN KW - biosensor KW - Pseudomonas putida Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1573 ER - TY - CHAP A1 - Baronas, Romas A1 - Ivanauskas, Feliksas A1 - Kulys, Juozas T1 - Mathematical modeling of biosensors based on an array of enzyme microreactors N2 - This paper presents a two-dimensional-in-space mathematical model of biosensors based on an array of enzyme microreactors immobilised on a single electrode. The modeling system acts under amperometric conditions. The microreactors were modeled by particles and by strips. The model is based on the diffusion equations containing a nonlinear term related to the Michaelis-Menten kinetics of the enzymatic reaction. The model involves three regions: an array of enzyme microreactors where enzyme reaction as well as mass transport by diffusion takes place, a diffusion limiting region where only the diffusion takes place, and a convective region, where the analyte concentration is maintained constant. Using computer simulation, the influence of the geometry of the microreactors and of the diffusion region on the biosensor response was investigated. The digital simulation was carried out using the finite difference technique. KW - Biosensor KW - Reaction-diffusion KW - modeling biosensor KW - microreactor Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1569 ER - TY - CHAP A1 - Barek, Jiri A1 - Fischer, Jan A1 - Navratil, Tomas A1 - Peckova, Karolina A1 - Yosypchuk, Bogdan T1 - Silver solid amalgam electrodes as sensors for chemical carcinogens N2 - The applicability of differential pulse voltammetry (DPV) and adsorptive stripping voltammetry (AdSV) at a non-toxic meniscus-modified silver solid amalgam electrode (m-AgSAE) for the determination of trace amounts of genotoxic substances was demonstrated on the determination of micromolar and submicromolar concentrations of 3-nitrofluoranthene using methanol - 0.01 mol L-1 NaOH (9:1) mixture as a base electrolyte and of Ostazine Orange using 0.01 mol L-1 NaOH as a base electrolyte. KW - Biosensor KW - Solid amalgam electrodes KW - voltammetry KW - carcinogens KW - 3-nitrofluoranthene KW - Ostazine Orange Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1554 ER - TY - CHAP A1 - Arida, Hassan A. A1 - Kloock, Joachim P. A1 - Schöning, Michael Josef T1 - Novel organic membrane-based thin-film microsensors for the determination of heavy metal cations N2 - A first step towards the fabrication and electrochemical evaluation of thin-film microsensors based on organic PVC membranes for the determination of Hg(II), Cd(II), Pb(II) and Cu(II) ions in solutions has been realised. The membrane-coating mixture used in the preparation of this new type of microsensors is incorporating PVC as supporting matrix, o-nitrophenyloctylether (o-NPOE) as solvent mediator and a recently synthesized Hg[dimethylglyoxime(phene)]2+ and Bis-(4-hydroxyacetophenone)-ethylenediamine as electroactive materials for Hg(II) and Cd(II), respectively. A set of three commercialised ionophores for Cd(II), Pb(II) and Cu(II) has been also used for comparison. Thin-film microsensors based on these membranes showed a Nernstian response of slope (26-30 mV/dec.) for the respective tested cations. The potentiometric response characteristics (linear range, pH range, detection limit and response time) are comparable with those obtained by conventional membranes as well as coated wire electrodes prepared from the same membrane. The realisation of the new organic membrane-based thin-film microsensors overcomes the problem of an insufficient selectivity of solid-state-based thinfilm sensors. KW - Biosensor KW - Heavy metal detection KW - thin-film microsensors KW - organic PVC membranes Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1545 ER - TY - CHAP A1 - Pijanowska, Dorota G. A1 - Remiszewska, Elzbieta T1 - pH-based detection of phenylalnine by potentiometric and colorimetric methods N2 - In this paper, methods of sample preparation for potentiometric measurement of phenylalanine are presented. Basing on the spectrophotometric measurements of phenylalanine, the concentrations of reagents of the enzymatic reaction (10 mM L-Phe, 0,4 mM NAD+, 2U L-PheDH) were determined. Then, the absorption spectrum of the reaction product, NADH, was monitored (maximum peak at 340 nm). The results obtained by the spectrophotometric method were compared with the results obtained by the colourimetry, using pH indicators. The above-mentioned two methods will be used as references for potentiometric measurements of phenylalanine concentration. KW - Biosensor KW - Phenylalanine determination KW - enzymatic methods KW - pH-based biosensing Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1536 ER - TY - CHAP A1 - Katz, Eugenii A1 - Willner, Itamar T1 - Magneto-controlled quantized electron transfer to surface-confined redox units and metal nanoparticles N2 - Hydrophobic magnetic nanoparticles (NPs) consisting of undecanoate-capped magnetite (Fe3O4, average diameter ca. 5 nm) are used to control quantized electron transfer to surface-confined redox units and metal NPs. A two-phase system consisting of an aqueous electrolyte solution and a toluene phase that includes the suspended undecanoatecapped magnetic NPs is used to control the interfacial properties of the electrode surface. The attracted magnetic NPs form a hydrophobic layer on the electrode surface resulting in the change of the mechanisms of the surface-confined electrochemical processes. A quinone-monolayer modified Au electrode demonstrates an aqueous-type of the electrochemical process (2e-+2H+ redox mechanism) for the quinone units in the absence of the hydrophobic magnetic NPs, while the attraction of the magnetic NPs to the surface results in the stepwise single-electron transfer mechanism characteristic of a dry nonaqueous medium. Also, the attraction of the hydrophobic magnetic NPs to the Au electrode surface modified with Au NPs (ca. 1.4 nm) yields a microenvironment with a low dielectric constant that results in the single-electron quantum charging of the Au NPs. KW - Biosensor KW - Nanoparticles KW - magnetic particles KW - quantum charging KW - modified electrode Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1528 ER - TY - CHAP A1 - Spannhake, Jan A1 - Schulz, Olaf A1 - Helwig, Andreas A1 - Krenkow, Angelika A1 - Müller, Gerhard A1 - Doll, Theodor T1 - High-temperature MEMS heater platforms: long-term performance of metal and semiconductor heater materials N2 - Micromachined thermal heater platforms offer low electrical power consumption and high modulation speed, i.e. properties which are advantageous for realizing nondispersive infrared (NDIR) gas- and liquid monitoring systems. In this paper, we report on investigations on silicon-on-insulator (SOI) based infrared (IR) emitter devices heated by employing different kinds of metallic and semiconductor heater materials. Our results clearly reveal the superior high-temperature performance of semiconductor over metallic heater materials. Long-term stable emitter operation in the vicinity of 1300 K could be attained using heavily antimony-doped tin dioxide (SnO2:Sb) heater elements. KW - Biosensor KW - Hotplate KW - heater metallisation KW - high-temperature stability KW - electro-migration KW - doped silicon KW - doped metal oxide KW - antimony doped tin oxide Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1513 ER - TY - CHAP A1 - Tymecki, Lukasz A1 - Glab, Stanislaw A1 - Koncki, Robert T1 - Miniaturized, planar ion-selective electrodes fabricated by means of thick-film technology N2 - Various planar technologies are employed for developing solid-state sensors having low cost, small size and high reproducibility; thin- and thick-film technologies are most suitable for such productions. Screen-printing is especially suitable due to its simplicity, low-cost, high reproducibility and efficiency in large-scale production. This technology enables the deposition of a thick layer and allows precise pattern control. Moreover, this is a highly economic technology, saving large amounts of the used inks. In the course of repetitions of the film-deposition procedure there is no waste of material due to additivity of this thick-film technology. Finally, the thick films can be easily and quickly deposited on inexpensive substrates. In this contribution, thick-film ion-selective electrodes based on ionophores as well as crystalline ion-selective materials dedicated for potentiometric measurements are demonstrated. Analytical parameters of these sensors are comparable with those reported for conventional potentiometric electrodes. All mentioned thick-film strip electrodes have been totally fabricated in only one, fully automated thickfilm technology, without any additional manual, chemical or electrochemical steps. In all cases simple, inexpensive, commercially available materials, i.e. flexible, plastic substrates and easily cured polymer-based pastes were used. KW - Biosensor KW - Potentiometry KW - thick-film technology KW - screen-printing KW - ion-selective electrodes Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1506 ER - TY - CHAP A1 - Bukhari, Syed Faisal Ahmed A1 - Yang, Wuqiang T1 - Multi-interface level sensors and new development in monitoring and control of oil separators N2 - In the oil industry, huge saving may be made if suitable multi-interface level measurement systems are employed for effectively monitoring crude oil separators and efficient control of their operation. A number of techniques, e.g. externally mounted displacers, differential pressure transmitters and capacitance rod devices, have been developed to measure the separation process with gas, oil, water and other components. Because of the unavailability of suitable multi-interface level measurement systems, oil separators are currently operated by the trial-and-error approach. In this paper some conventional techniques, which have been used for level measurement in industry, and new development are discussed. KW - Biosensor KW - Level sensor KW - multi-interface measurement KW - electrical capacitance tomography KW - ECT Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1498 ER - TY - CHAP A1 - Pijanowska, Dorota G. A1 - Remiszewska, Elzbieta A1 - Pederzolli, Cecilia A1 - Lunelli, Lorenzo A1 - Vendano, Michele A1 - Canteri, Roberto A1 - Dudzinski, Konrad A1 - Kruk, Jerzy A1 - Torbicz, Wladyslaw T1 - Surface modification for microreactor fabrication N2 - In this paper, methods of surface modification of different supports, i.e. glass and polymeric beads for enzyme immobilisation are described. The developed method of enzyme immobilisation is based on Schiff’s base formation between the amino groups on the enzyme surface and the aldehyde groups on the chemically modified surface of the supports. The surface of silicon modified by APTS and GOPS with immobilised enzyme was characterised by atomic force microscopy (AFM), time-of-flight secondary ion mass spectroscopy (ToF-SIMS) and infrared spectroscopy (FTIR). The supports with immobilised enzyme (urease) were also tested in combination with microreactors fabricated in silicon and Perspex, operating in a flow-through system. For microreactors filled with urease immobilised on glass beads (Sigma) and on polymeric beads (PAN), a very high and stable signal (pH change) was obtained. The developed method of urease immobilisation can be stated to be very effective. KW - Biosensor KW - Microreactors KW - surface modification KW - enzyme immobilisation KW - lab-on-a-chip Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1480 ER - TY - CHAP A1 - Platen, Johannes A1 - Poghossian, Arshak A1 - Schöning, Michael Josef T1 - Microstructured Nanostructures – nanostructuring by means of conventional photolithography and layer-expansion technique N2 - A new and simple method for nanostructuring using conventional photolithography and layer expansion or pattern-size reduction technique is presented, which can further be applied for the fabrication of different nanostructures and nano-devices. The method is based on the conversion of a photolithographically patterned metal layer to a metal-oxide mask with improved pattern-size resolution using thermal oxidation. With this technique, the pattern size can be scaled down to several nanometer dimensions. The proposed method is experimentally demonstrated by preparing nanostructures with different configurations and layouts, like circles, rectangles, trapezoids, “fluidic-channel”-, “cantilever”- and meander-type structures. KW - Biosensor KW - Nanostructuring KW - layer expansion KW - pattern-size reduction KW - self-aligned patterning Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1477 ER - TY - CHAP A1 - Förster, Arnold A1 - Stock, Jürgen A1 - Montanari, Simone A1 - Lepsa, Mihail Ion A1 - Lüth, Hans T1 - Fabrication and characterisation of GaAs Gunn Diode Chips for applications at 77 GHz in automotive industry N2 - GaAs-based Gunn diodes with graded AlGaAs hot electron injector heterostructures have been developed under the special needs in automotive applications. The fabrication of the Gunn diode chips was based on total substrate removal and processing of integrated Au heat sinks. Especially, the thermal and RF behavior of the diodes have been analyzed by DC, impedance and S-parameter measurements. The electrical investigations have revealed the functionality of the hot electron injector. An optimized layer structure could fulfill the requirements in adaptive cruise control (ACC) systems at 77 GHz with typical output power between 50 and 90 mW. KW - Biosensor KW - Gunn diode KW - microwave generation KW - GaAs hot electron injector Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1462 ER - TY - CHAP A1 - Rabner, Arthur A1 - Shacham, Yosi T1 - A concept for a sensitive micro total analysis system for high throughput fluorescence imaging N2 - This paper discusses possible methods for on-chip fluorescent imaging for integrated bio-sensors. The integration of optical and electro-optical accessories, according to suggested methods, can improve the performance of fluorescence imaging. It can boost the signal to background ratio by a few orders of magnitudes in comparison to conventional discrete setups. The methods that are present in this paper are oriented towards building reproducible arrays for high-throughput micro total analysis systems (µTAS). The first method relates to side illumination of the fluorescent material placed into microcompartments of the lab-on-chip. Its significance is in high utilization of excitation energy for low concentration of fluorescent material. The utilization of a transparent µLED chip, for the second method, allows the placement of the excitation light sources on the same optical axis with emission detector, such that the excitation and emission rays are directed controversly. The third method presents a spatial filtering of the excitation background. KW - Biosensor KW - Fluorescence KW - imaging KW - lab-on-chip KW - fluidic KW - lenslet array KW - LED chip KW - image sensor KW - biosensor Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1456 ER - TY - CHAP A1 - Kreutz, Christian A1 - Lörgen, Jürgen A1 - Graewe, Boris A1 - Bargon, Joachim A1 - Yoshida, Mayumi A1 - Freso, Zachary M. A1 - Frèchet, Jean M. J. T1 - High frequency quartz micro balances: a promising path to enhanced sensitivity of gravimetric sensors N2 - An array of 50 MHz quartz microbalances (QMBs) coated with a dendronized polymer was used to detect small amounts of volatile organic compounds (VOCs) in the gas phase. The results were compared to those obtained with the commonly used 10 MHz QMBs. The 50 MHz QMBs proved to be a powerful tool for the detection of VOCs in the gas phase; therefore, they represent a promising alternative to the much more delicate surface acoustic wave devices (SAWs). KW - Biosensor KW - Quartz micro balances KW - electronic noses dendronized polymers inverted mesa technology Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:a96-opus-1445 ER -