494 Works

BS6.1 - Noble Metal-based Nanoparticles in Modern Bioanalysis

M. Pietrzak, M. Drozd, P. Ivanova & E. Malinowska
This talk will be focused on the synthesis and studies on various types of noble metal-based nanoparticles, which characterize themselves with catalytic activity mimicking enzymes from the class of oxidoreductases. Both the monometallic nanostructures as well as alloyed ones will be compared in terms of peroxidase-, catalase-, glucose oxidase- and superoxide dismutase-like activity. Moreover, core/shell and hollow nanoparticles, in some cases containing residues of templates inside, will be presented and their usefulness in various analytical...

5.3 - Testing Acquisition of GPS / GNSS Location and Velocity to Improve Safety in Autonomous Driving

K. Von Hünerbein & W. R. Lange
GPS (Global Positioning) and GNSS (Global Navigation Satellite Systems) yield very accurate positioning, velocity and timing, which are crucial for many ADAS (advanced driver assistance systems) and in autonomous driving. 3D locations can be as accurate as a few decimeters, with the help of additional correction methods. In addition a wide range of different sensors, among them optical, LIDAR and RADAR are used to detect obstacles and street marks, GNSS location and trajectory data can...

P2GS.13 - Fabrication of ZnO-Based Ethanol Gas Sensors Using Aerosol-Assisted Atmospheric Pressure Plasma

D. Y. Kim, J. E. Lee, H.-K. Lee, C.-S. Park & H.-S. Tae
This contribution studies a fast and simple method for depositing metal oxides by using an aerosolassisted atmospheric pressure plasma process. ZnO films were deposited on arbitrary substrates and characterized by scanning electron microscopy and X-ray diffraction. In addition, ZnO-based gas sensors were tested for the detection of ethanol gas at concentrations between 100 ppb to 1000 ppb. In this study, ZnO was adopted as an example of metal oxides that can be deposited but it...

SE.3 - Highly selective and stable mixed-potential type gas sensor based on stabilized zirconia and Cd2V2O7 sensing electrode for NH3 detection

F. Liu, J. Wang & G. Lu
Among engine aftertreatment systems, selective catalytic reduction (SCR) that uses urea as reducing agent has been recognized as the most promising technology to eliminate the NOx emissions from diesel vehicles. In this system, a urea solution is injected into an exhaust line to react with the NOx from combustion exhaust. To accurately control the amount of urea injected and to avoid NH3 slips that aggravate air pollution problems, a powerful NH3 gas sensor for on-board...

EC2.1 - Carbon nanostructures-based electrochemical (bio)sensors for the quantification of environmental and clinic markers

G. A. Rivas, M. D. Rubianes, F. C. Gutierrez, M. Eguílaz, M. C. Rodríguez, P. R. Dalmasso & P. Gallay
This presentation will be focused on the importance of the rational functionalization of carbon nanotubes for the successful development of sensitive and selective electrochemical (bio)sensors devoted to the quantification of clinical and environmental markers.

P1NM.14 - Percolating metallic structures templated on laser - deposited carbon nanofoams derived from graphene oxide: Applications in humidity sensing

S. Nufer, A. B. Dalton, J. P. Salvage, A. Shmeliov & A. Brunton
Carbon nanofoam (CNF) is a low-density, high-surface-area material formed by aggregation of amorphous carbon nanoparticles into porous nanostructures. We report the use of a pulsed infrared laser to prepare CNF from a graphene oxide (GO) target material. Electron microscopy shows that the films consist of dendritic strings which form web-like three-dimensional structures. The conductivity of these structures can be modified by using the CNF as a nanostructured scaffold for gold nanoparticles deposited by sputter coating,...

AR2.2 - “Chemical gamut” and implications for describing the analytical capability of sensor arrays

K. J. Johnson & A. C. Knapp
There is a general lack of systematic, generally applicable metrics for expressing the capability of arrays of partially selective sensors for chemical analysis. Such metrics would allow for objective comparison of widely different array technologies and efficient optimization of such arrays for uncertain, complex sensing tasks. This work explores the use of concepts and formalisms from the field of color theory for use in describing analytical capability of chemical sensor arrays.

AP4.5 - Detecting breath and skin emitted tracers of humans with flame-made sensor arrays

N. J. Pineau, A. T. Guentner, S. E. Pratsinis, P. Mochalski, H. Wiesenhofer, C. A. Mayhew & A. Agapiou
Earthquakes are lethal natural disasters frequently burying people alive under collapsed buildings. Tracking entrapped humans from their unique volatile chemical signature with hand-held devices would accelerate urban search and rescue (USaR) efforts. Here, a compact and orthogonal sensor array has been designed to detect the breath- and skin-emitted metabolic tracers acetone, ammonia, isoprene, CO2 and RH, all together serving as sign of life. It consists of three nanostructured metaloxide sensors (Si-doped WO3, Si-doped MoO3 and...

BS6.4 - A fluorescent biosensor based on molybdenum disulfide (MoS2) nanosheets and protein aptamer for sensitive detection of carcinoembryonic antigen

L. Zhao, M. Cheng, G. Liu, H. Lu, Y. Gao & G. Lu
Simple, rapid, sensitive detection of tumor biomarker carcinoembryonic antigen (CEA) is of great importance for the screening, diagnosis and prognosis evaluation of various gastroenteric tumor. This paper presents a "turn-on" flourescent biosensor based on molybdenum disulfide(MoS2) nanosheets and fluorophore labeled protein aptamer for rapid and sensitive detection of CEA protein. CEA aptamer probe can be adsorbed on the surface of MoS2 nanosheets in close proximity via van der Waals force, triggering fluorescence resonance energy transfer,...

11.1 - Intelligent Networked Flight Test Instrumentation for a new Fighter Prototype

G. Martínez Morán
Airbus Defence & Space treasures more than 10 years of expertise in implementing fully network based flight test instrumentations (FTI). The developments accomplished during this long walk have brought to fruition very flexible and versatile FTI. Big platform programs (such as C295, A330-MRTT and A400M) have been taking good advantage from these features. Transferring these features to a smaller aircraft (such as a fighter) has been the last challenge achieved. Restrictions due to the lack...

BS5.2 - Development of Rapid Assays for Detection and Identification of Pathogenic Bacteria

S. F. Y. Li & H. Li
Bacterial contamination in water and food poses serious hazards worldwide and the rapid detection of pathogenic bacteria is critical to the prevention and identification of problems related to public health and safety. This study focuses on the development of rapid detection assays by using biosensors for rapid, sensitive, specific pathogens detection in water or complex food matrices. Quartz crystal microbalance biosensors with different bio-recognition elements, strategies for improved sensitivity by nanomaterials, sample preparations to eliminate...

P1BS.3 - Modification of Optical Interferometers with Functional Polymers and Hydrogels for Sensing of Protein Biomarkers

S. Kurzhals, E. Melnik, F. Strasser, P. Muellner, R. Heer, R. Hainberger & G. Koppitsch
Surface modification of Mach-Zehnder interferometers with biotin-modified polyethylenimine (PEl-B) and PEI-B loaded hydrogels can give access to biosensors combining highly binding matrices with low non-specific interactions, useful for protein biosensing. Permeability of hydrogel layers prepared by photocrosslinking depends on used precursors as well as crosslinking conditions. Protein loading capacity is probed for both functionalization strategies showing high initial response for directly modified surfaces and linear response with receptor concentration for sensors modified with receptor loaded...

GS1.4 - Sensing with Noble Metal Oxide Loaded WO3

A. Staerz, U. Geyik, H. Brinkmann, U. Weimar & N. Barsan
WO3 is one of the most commonly used materials for commercially available semiconducting metal oxide based gas sensors. In most cases, noble metals are added to WO3 to increase stability and tune its sensing characteristics. In order to deliberately tune SMOX based sensors, understanding how the presence of the noble additives affects sensing would be helpful. Here using, DC resistance measurements and operando diffuse reflectance infrared Fourier spectroscopy (DRIFTS) the previously suggested sensing mechanism for...

P2GS.27 - Self-Assembled MoO3 Nano Golf Balls: A Trimethylamine Gas Sensor

P. Srinivasan & J. B. Balaguru Rayappan
Development of trimethylamine (TMA) sensor is of potential interest, since TMA is one of the biomarkers of sea food quality / freshness assessment. In this context, self-assembled MoO3 golf ball like nanospheres based sensing element was fabricated using spray pyrolysis technique. Investigations were carried-out to understand the growth features by varying the substrate temperature in the interval of 50 K from 523 K to 623 K. An intermediate tetragonal phase molybdenum compound was formed at...

SE.2 - Oxygen solid electrolyte coulometry: Chances, challenges and new approaches

J. Zosel, A. Herms, J. Yao, M. Schelter, V. Vashook, U. Guth & M. Mertig
Oxygen solid electrolyte coulometry (OSEC) based on electrochemical cells made of yttria-stabilized zirconia (YSZ) is a long-standing method for gas sensing, material characterization as well as biological or medical measurements of oxygen exchange. Newer approaches are directed on analytical applications for chromatography or dissolved gas measurements. With optimized cell construction and operating conditions, the method enables the detection of gaseous quantities down to the picomolar range. The contribution gives an overview on the most important...

P1DH.14 - Continuous Non-Invasive Sodium Monitoring in Extracorporeal Circuits

M. Berger, D. Niebuhr, M. Allers & S. Zimmermann
Dialysis is a blood purification therapy indicated by kidney failure, where blood is pumped via an extracorporeal circuit into a dialyzer consisting of a semi-permeable membrane separating blood and the dialysate. Due to the concentration gradients across this membrane, toxins can be removed from the blood by diffusion and the electrolyte balance can be regulated [1]. However, excessive changes of osmotic substances such as electrolytes can be critical. For instance, a rapid or excessive loss...

BS7.2 - 3D cardiomyocyte-based biosensor with tissue engineering scaffold and microelectrode array

X. W. Wei, Q. Wu, Y.-X. Pan, Z. Qin, N. Hu, P. Wang & Q. Gao
Polylactic acid (PLA) and polycaprolactone (PCL) were selected as materials to fabricate tissue engineering scaffolds by 3D printing and electrospinning, which were used to culture cardiomyocytes of neonatal rats. Then the scaffolds with cardiomyocytes were coupled with microelectrode array (MEA) to form a 3D cell-based biosensor, which was used to detect the extracellular field potential (EFP) of cardiomyocytes. The experimental results demonstrated that cardiomyocytes adhered and grew well in scaffolds, and could drive fibers to...

P2MM.9 - Voltammetric Thin Layer Ion Selective Membranes

D. Yuan & E. Bakker
Voltammetric thin layer ion selective membranes (ISMs) that consist of two layers, an outside thin polymeric sensing layer and an inner conducting polymer layer, are introduced here. This voltammmetric ISM can be used for sensing application within two modes: a stripping mode and a potentiometric mode. Transitions between the two modes and concentration limit for each mode are both experimentally explored and theoretically modelled by finite difference method. Simulation agrees well with experimental data. Besides...

P2EM.5 - Gold-coated Black Silicon: An Efficient Substrate for Laser Desorption Ionization Mass Spectrometry Applications

S. A. Iakab, P. Rafols & X. Correig
Mass spectrometry imaging is a label-free analytical technique capable of molecularly characterizing biological samples, including tissues and cell lines. The organic matrices used in matrix-assisted laser desorption/ionization mass spectrometry experiments are not suitable for low weight compounds (i.e. metabolites) due to the big ions interference generated by the organic matrix. The use of solid-state substrates instead of the classical matrices is very appropriate to overcome this problem. In this study we focus on developing a...

GS5.3 - Ultra-Thin ZnFe2O4 Nanosheets-Decorated ZnO Hollow Nanofibers for High Sensitive Acetone Sensor

X. Li, C. Shao, X. Li, Y. Liu & G. Lu
Heterostructures may exhibit not only a combination of properties from the individual component but also enhanced properties arising from the synergistic effects between the components[1]. In this study, a multi-step strategy for constructing ZnO/ZnFe2O4 hollow nanofibers with double-shell architectures was presented. The preparation of ZnO hollow nanofiber included the first preparation of PVP nanofiber through electrospinning as an hard template and then growth of ultrathin ZnO layer through atomic layer deposition (ALD) method with subsequent...

P1DH.10 - Development of a Novel Wireless Multi-Channel Stethograph System for Diagnosing Pulmonary and Cardiovascular Diseases

X. Zhang, B. B. Narakathu, D. Maddipatla, B. J. Bazuin & M. Z. Atashbar
A multi-channel stethograph system was developed for diagnosing pulmonary and cardiovascular diseases (PCD). An array of 16 microphone sensors was used to record heart, lung and trachea (HLT) sounds of the patients. A 16-channel signal conditioning PCB was used to process the acquired HLT sounds. The HLT sounds are converted to time domain waveforms using a MATLAB® script. From among the converted HLT sounds, an algorithm was developed to analyze the trachea sounds for diagnosing...

P2GS.3 - Fabrication of microporous membranes for highly selective gas sensors

A. Güntner, S. Abegg, K. Wegner & S. Pratsinis
A major limitation of gas sensors is poor sensor, hindering the accurate detection of single target molecules in complex gas mixtures. Here, a fabrication route is presented that overcomes this limitation by combining a selective zeolite membrane with a highly sensitive Pd-doped SnO2 sensor. While the membranes are synthesized hydrothermally, the sensors are produced in a flame aerosol process. These two processes are decoupled and therefore both membrane and sensor can be optimized individually, to...

P1AP.4 - Highly Sensitive CH4 Gas Sensors Based on Flame spray made CrOx doped SnO2 Sensing Films for Livestock Farming Applications

K. Bunpang, A. Wisitsoraat, A. Tuantranont, S. Phanichphant & C. Liewhiran
Methane (CH4) is one of the most challenging flammable gases to be detected and controlled for domestic safety or environmental monitoring. Methane sensor is highly needed in gas detection equipments for detecting methane released in home, automotive, industrial settings or livestock farming communities [1,2]. Hence, it is interesting to apply effective sensing materials for sensitive CH4 detection. In this work, the as-prepared 0 2 wt% CrOx doped SnO2 nanoparticles were produced by flame spray pyrolysis...

P2NG.4 - High Performance Acetone Detector Based on 3D Inverse Opal Structure Hybrid Microspheres

P. Sun, T. Wang & G. Lu
Over the past few years, the semiconducting metal oxides (SMOs)-based chemical sensors are currently the subject of scientific and medical research, because of its low cost, real-time, miniaturization and integration. Thus, in order to improve sensor response toward a particular target gas, the rational design of sensing materials with highly ordered and interconnected porous structure is a viable solution, which could provide larger specific surface area, richer surface active sites and rapid mass transfer. Furthermore,...

P1DH.7 - Chemoresistive Sensors for Cancer Pre-Screening in Human Tissue

M. Astolfi, G. Anania, M. Benedusi, V. Guidi, N. Landini, C. Palmonari, G. Rispoli, P. Secchiero, V. Tisato, S. Gallo, M. Valt, G. Zonta, C. Malagù & S. Gherardi
One of the greatest goals in medicine is early-stage detection of tumors, to allow physicians and surgeons to apply the therapies available, which are usually successful on small volume cancers only. Our purpose is to identify the presence of a cancer by detecting the metabolites exhaled by cancer cells (VOCs) that are different by the ones exhaled by healthy cells, through a chemoresistive sensor array. In this feasibility study, this fast-responding sensing technique proved to...

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  • 2018
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