(i) Sensors, MEMS and Biosensors
(ii) Polymers Nano Composites characterization and applications
(iii) Plant Tissue Culture applications and biotechnology.
The last decade has seen a rapidly growing interest in the development of sensors and associated electronic circuitry using sophisticated microcontrollers for a variety of purposes like pollution monitoring mostly due to auto exhaust deadliest gases emissions, food analysis, agricultural analysis, biomedical measurements, clinical analysis and automatic control etc. The sensors are classified as Physical, Chemical and Biological . There are number of ways we can classify sensors. The classifications are in terms of the physical principles with each group off sensors i.e. Resistive, Capacitive, Electromagnetic, Inductive, Thermoelectric, Piezoelectric, Photo-voltaic, Hall effect and elastic sensors.
Among the various types of biosensors the enzyme based biosensors are widely use in various applications due to their significant properties. Enzymes bind to the substrate with high selectivity. They have catalytic activity, thus improving sensitivity .Biosensors is in fact, developing at the interface between existing and emerging technologies, combining physical and biological disciplines with state -of- the-art electronics.
Rapid industrialization and technological advancements over the past few decades have created along with other needs, a dire requisite for precise detection and regulation of gaseous elements of matter. This demand is of vital importance for the industrial and technological enhancement. THIN FILMS &; THICK FILMS GAS SENSORS are need for this purpose. In the recent trends the micro sensors have found tremendous potential in research field and sophisticated instrumentation. Such sensors have evolved of the development of integrated circuits. Microelectromechanical Systems (MEMS) and electronic nose systems are the developing fields in research and development.
Following areas will be covered:
- Infra Red (IR) Normal Coordinates and Polymers Nano- composites
- Semi- empirical Molecular Calculations.
- Structure activity correlation the in biologically active molecules.
Plant tissue culture is an important tool in conservation of economically important and endangered plant species. We are interested to conserve and propagate Economically Important Plants use for present needs.These are the areas:
- Alternatives Sources of energy – Plant Biotechnology of Petro Crops.
- Bioremediation of Recalcitrant Pollutants – Fungal Biotechnology
- Biotransformation of agro residues by microbes – Fungal Biotechnology
- Agricultural Biotechnology – Development of Serodiagnostics for Viruses
- Plant and Microbial Diversity.
Lead Guest Editor
Retired as Reader Department of Electronics from Sardar Patel University Vallabh Vidyanagar-388120, Gujarat
Advanced Organic Chemistry , P.D.Patel Institute of Applied Sciences, Charotar University of Science & Technology(CHARUSAT).
P G Department of Biosciences, Sardar Patel University, Vallabh Vidyanagar, Gujarat-388120
Former Vice Principal & Head Department of Chemistry, Tolani Arts & Science College, Adipur, Kutchh
Department of Biosciences, Sardar Patel University, Vallabh Vidyanagar – 388 120, Gujarat, INDIA
Paper Accepted-In progress
☑ Sensing of Picric acid through fluorescence studies of PANI-IPN film
Tayyab ali2, J. Venkata viswanath1,4, N.V. Srinivasa Rao4, A. Venkataraman1,3*
1Materials Chemistry Laboratory, Department of Materials Science, Gulbarga University, Kalaburagi-585106 Karnataka, India
2Walchand Centre for research in nontechnology & Bionanotechnology (wcRnb), Solapur, Maharashtra, India.
3Department of Chemistry, Gulbarga University, Kalaburagi-585106 Karnataka, India.
4GUK R & D Centre, Premier Explosive limited, Peddakandukur, Nalgonda. Telengana, India.
An interpenetrating polymer network (IPN) film for sensing of Picric acid (PA) is prepared by chemical assembly of polyaniline-polyvinyl alcohol (PANI-PVA) film by casting on a glass substrate. The prepared IPN film and is employed for the detection of a representative nitroaromatic compound (NAC), in the present case, (PA), for both in solution and in vapor phase of the analyte. This molecular design combines the advantages of IPN film based on single layer chemistry and the signal amplifications as effective way to create novel sensing film for the detection of NACs and other high energy materials (HEMs). Significant static fluorescence quenching was observed for the IPN films within a few seconds of treating with PA solutions. The vapour phase detection of PA was observed on IPN films with good response times. Almost linear increase in the sensitivity calculation obtained through the electrical resistivity measurements within 30.0 min is observed. The structural study of the IPN films before and after treatment with PA is studied employing FTIR spectrometer and stereozoom microscope. Fluorescence quenching Experiments on the IPN films showed that these films can be efficiently reused for two successive cycles. The electrical resistivity studies showed the film to sustain the vapour phase detection for a single measurement. The fluorescence studies and the electrical resistivity studies showed that the films are potential candidates for detection of PA vapours.
PANI-IPN film, Fluorescence, FTIR, Morphology, Sensing behavior.
☑ Fabrication of Indium Oxide thin films sensor for H2S
H. N. Kapse1 ,B. H. Lashkari2, K. K. Makhija3
1Instrumentation & Control Department - Institute of Science & Technology for Advanced Studies & Research (ISTAR), Vallabh Vidyanagar - 388120, Gujarat, India
2Electronics Department - V. P. & R. P. T. P. Science College, Vallabh Vidyanagar - 388120, Gujarat, India
3Retired Reader in Electronics, Guest Editor-Sensors &Transducers, A/5 Kalikundnagar Society, Bakrol, Dist: Anand – 388315, Gujarat, India
The present work is based on fabrication of Indium oxide with Tellurium dispersed thin film sensor for H2S gas application. The study reveals capability of Indium Oxide (IO) thin films as selective H2S gas sensor when Tellurium (Te) layer was dispersed. The inbuilt heater was fabricated from Indium Tin Oxide (ITO) thin films. Sensor showed promising results as the study of sensitivity was carried out for different concentrations of H2S gas. The ratio of electrical conductance when, the sensor is operating at a higher temperature and to that at lower temperature is unaffected by water vapour but is sensitive to H2S species. Hence the detrimental effects of humidity on the sensing properties of the IO thin film gas sensors are almost negligible on H2S . The gas sensor was operated at concentrations of 40, 100, 200 & 400 ppm of H2S gas at room temperature and was found to have good sensitivity and fast response.
H2S Gas Sensor, Indium Oxide, Thin films.