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Individual project

Individual project. Nanomaterials HIGH SENSITIVITY SENSORS. Teacher: Cristina Felea. Student: Cenan Marius Paul. INTRO DUCTION.

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Individual project

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  1. Individual project Nanomaterials HIGH SENSITIVITY SENSORS Teacher: Cristina Felea Student: Cenan Marius Paul

  2. INTRODUCTION Oxford English Dictionary defines the sensor as “a device that detects and records the conditions or properties, indicate or sometimes respond to information received”

  3. Features: • use area • resolution (sensitivity) • maximum stimulus frequency that can be detected (selectivity) • accuracy (measurement error) • sensor size and weight • operating temperature and environmental conditions • life • long-term stability and cost

  4. Use to measurement of: • pressure • distance • movements • speed • acceleration • force • temperature • chemical concentration

  5. The sensor sensitivity can be improved by doping (changing the concentration) or by microstructural changes such as reducing the particle size to nanodimensions (5-50 nm), which improves the properties and performance of gas sensors due to increased surface area. OXIDE SEMICONDUCTOR FILMS USED AS GAS SENSORS FOR ENVIRONMENTAL MONITORING

  6. Conductive films used as gas sensors Conductive materials used as gas sensors

  7. Sensors based on oxide materials (SMO) • report, evaluate and monitor the presence of gas • chemical resistance and high temperature field that can be used

  8. Network image of Tungsten oxide nanowires

  9. PRELIMINARY RESULTS We investigated the behavior of several oxides and TiO2has been the most extensively used in controlling air/fuel ratio in internal combustion engines. This oxide can also be used in wastewater purification.

  10. NANODOCTORS IN 30 YEARS • to provide medication • tumor removers • analysis and rebuild tissue destroyed by accident A nanorobot, able to administer poison only target bacteria, would greatly simplify things, “said Ottilie Saxl, chief executive of the U.S. Institute for Nanotechnology”.

  11. REFERENCES: • www.jnanobiotechnology.com/articles • www.chimie.go.ro • www.disclose.tv/action/viewvideo/3062/Nanotechnology__Nokia_Morph_Concept_2008 • www.nanowerk.com/nanotechnology/research_news.php • P. Tmoseley, J. O. W.Norris, D. E. Williams, Techniques and mechanisms in gas sensing, Adam Hilger, Bristol, 1991 • . E. Williams, P. T. Moseley, J. Mater. Chem.,1, 809-825(1991) • M. Kuwabara, T. Ide, Co gas sensivity in porous semiconducting barium titanate, Am. Ceramic Soc. Bull., 66, 1401-1405(1987) • C. M. Chiu, Y. U. Chang, The structure, electrical and sensing properties for CO of the La0.8Sr0.2CO1-xNixO3- system, Mater. Sci. Eng. A, 266, 93-98(1999)

  12. Thank you!

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