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This paper presents the design simulations of MEMS based micro-cantilever beam made up of PDMS properties using COMSOL Multiphysics. The cantilever beam structure on fluid Channel has been simulated. The simulations results into the stress, displacement, The study brings out a novel methodology for detection of pathogens at minute level. The in-flow methodology enables the device to be used in online...
Mn has substituted part of Fe in cobalt ferrite (CoFe2O4) and resultant material has been abbreviated as CFMO (CoFe1.7Mn0.3O4). Chemical co-precipitation route has been followed for synthesis. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDX), I-V measurement were performed for sample characterization. The influence of Mn substitution was seen...
Simple, compact, robust and handy device for chemical sensing using microstrip-based metamaterial Complementary-Split-Ring-Resonator (CSRR) is proposed. A pseudo-microfluidic channel is fabricated upon the CSRR pattern to form the sensor. Combination of two liquids namely, ethanol and petrol, and their varying combinations are sensed for hybrid fuel applications. Simulation and experimental results...
MIL-101-Fe (Materials of Institute Lavoisier) nanoscale-metal organic frameworks (NMOFs) were synthesized by solvothermal method with constant heating at 200°C in silicon oil bath. The as prepared MIL-101-Fe nanoparticles are observed to have particle size in the range of 200–210 nm with multiple shape morphology. Further as prepared MIL-101-Fe are functionalized by incorporating amine group into...
Output from any MEMS Sensor usually lacks the power that can be fed directly to any interface circuit. Hence there is a need to add additional circuitry in between the output of the MEMS sensor and the interface circuit. In this paper the authors have compared two combinations of modulator / demodulator circuitry which can be used in the readout circuitry for any MEMS sensors. The two combinations...
An electrochemical amperometric sensor measures the electric current on the surface of the working electrodes and estimates the concentration of chemical or biological species. Electrochemical sensor is fast and selective but electrochemical sensing is a complex phenomenon involving both physical and chemical processes. With a view to understand the basic operation of electrochemical sensor, present...
The limitations of the classical pattern recognition algorithms may be addressed by an incremental way of learning, through which the existing knowledge base can be expanded from the information gathered solely from new set of samples. In this study, a novel incremental Self Organizing Map (i-SOM) algorithm is proposed and applied on the data generated from an electronic nose for black tea quality...
In previous research work related to the acoustic sensors, the researchers had focused on the individuality of the sensors for aeroacoustic application and sensors for audio range application. This paper describes a simple and novel model of acoustic sensor for aeroacoustic and audio applications (microphone). The model of the device presented in this paper shows interoperability. The sensor reported...
The Dual-Probe Heat-Pulse technique has been widely used for in-situ moisture sensing. In the heater probe described in our earlier work the power consumption was 350 mW-the lowest in this category of sensors. In this paper, by employing a material selection method, we further improve the performance of the sensor by employing Parylene-coated nichrome wire and different packaging methods. The power...
LTCC is a known suitable platform for microfluidic systems. We have developed actuation-less non-return valve for gases and liquids, which is based upon the inlet and reverse pressure. This work compares three different designs of such valves. In these designs, top lid and bottom cavity layer together forms micro fluidic channel, through which fluid or gas can flow. The pressure based movable ceramic...
Thispaper presents the design and realization of a context-aware wireless health monitoring system for recording the heartbeat (HR) and respiration (RR) rate based on an indirect measurement approach. The system consists of a contact-less medical sensor as well as a communication infrastructure for handling the transmission and reception of the measured results. The contact-less sensor includes a...
Molecular level interactions and accessibility to binding site play a critical role in efficacy of biosensors. Details on the orientation and location of binding of a biomarker to a bioreceptor can be obtained through computational modeling and analysis. In the present paper, Molecular Dynamics (MD) was used to model the and understand the molecular interaction within a aptamer based sensor using...
A methanol sensor based on polymer functionalized Quartz Tuning Fork (QTF) has been demonstrated. Thin polymer wires, formed of different polymers and with different additives, were used to form bridges between the two tines of the QTFs. The mechanical properties of the polymer wires, as well as the effective mass of the wires determine the resonant frequency of the QTF sensor. The interaction of...
The Al2O3 modified ZnO nanostructure with 1:9 ratio was synthesized at 500°C using solid-state reaction technique. The prepared nanostructure material was characterized with XRD and FE-SEM technique. XRD indicate the formation of wurtzite phase of ZnO. FE-SEM confirms the formation of hexagonal shaped rod like morphology. The sensing characteristic of the material was tested using ethanol gas.
The HTS SQUID sensors coupled to an on-chip integrated planar gradiometric pick-up loop were fabricated using highly reliable advanced micro-fabrication techniques such as deposition of superconducting thin films by Pulsed Laser Deposition (PLD), UV photolithography and RF ion beam etching. It may be noted that use of wire wound gradiometers and approaches based on electronic subtraction of sensor...
Electro-chemical discharge machining (ECDM) is a recent technique used to machine insulating materials like glass and ceramics. This paper presents the results of the combined effects of tool feed-rate and tool shape on the micro-machining of a quartz substrate using an ECDM process. The investigations show that a tool with a spherical tip provides a profile with a reduced entrance diameter and the...
This research presents a metal functionalized titanium dioxide (TiO2) nanotube based sensor developed for detection of volatile biomarkers (methyl p-anisate and methyl nicotinate) associated with tuberculosis (TB). In this work self-aligning TiO2 nanotubes were fabricated, and functionalized with cobalt for specific binding to the volatile biomarkers of interest. Mimics of the volatile biomarkers...
Studies on infectious diseases have helped us understand the extent to which public health systems would benefit from mapping the real-time distribution, condition and treatment efficacy of infectious diseases. Evidence suggests there is deficiency in timely and relevant geographic information that is undermining clinical, epidemiological and public health aspirations in areas affected with epidemic-prone...
Compositions of nominal formula, SrFe1−xTixO3-δ (x = 0 − 0.8) were prepared by solid state method and characterized by X-ray diffraction and Mossbauer spectroscopic studies. Electrical conductivities of these samples were studied at different temperatures in three different oxygen concentrations. Thin films of SrFe0.2Ti0.8O3-δ and SrFe0.35Ti0.65O3-δ were deposited on polycrystalline alumina using...
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