Nanosensors
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Nano sensors are sensors that operate on an atomic or molecular scale and have smaller size, lower weight, and modest power requirements compared to larger sensors. There are three main types of nano sensors: physical sensors, chemical sensors, and biosensors. Cantilever array sensors, nanotube sensors, and nanowire sensors are examples of nano sensors. Cantilever array sensors use small silicon bars coated with receptors to detect minute changes in mass or chemicals. Nanotube sensors can detect molecules in the parts per million range using carbon nanotubes coated with strands of DNA. Nanowire sensors transmit signals using a single stranded DNA detector connected to a carbon nanotube. Nano sensors have applications in disease diagnosis, detection
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Nanosensors
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- 3. Sensors operatingon the scale of atoms and molecules Smaller size, lower weight, modestpower requirements Data storagesystems
- 4. PHYSICAL SENSORS CHEMICAL SENSORS BIOSENSORS i. Bio receptors ii. Transducers iii. Detectors
- 5. CANTILEVER ARRAY SENSORS NANOTUBESENSORS NANOWIRE SENSORS
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- 7. WORKING BIO CHEMICAL/PHYSIC AL PROCESS MICROELECRO MECHANICAL SYSTEM
- 8. PRECISSION CANTILEVERS: 300nm THICKNESSTOLERANCE PRECISSION RESONANCE FREQUENCY: SPECIALCANTILEVER MOUNT EASY HANDLING: VERTICAL CHIP SIDEWALLS,OPTIONALNON STICKING CONTAMINATION FREESTORAGE
- 9. SIZE/SHAPE RECTANGULAR SHAPED SILICONBARS DUOSENSISSENSORS(2 CANTILEVERS PER CHIP) OCTOSENSIS SENSORS(8 CANTILEVERS PER CHIP)
- 10. FOR DIAGNOSISOF DIABETESMELLITUS Smallamounts of acetone in a patient’s breath can be detected by cantilever array sensor technique which may attribute to early diagnosis of diabetes mellitus. FOR DETECTION OF BACTERIAS,FUNGI,VIRUSES antigens on cell membrane surface results in additional mass loading, ultra- sensitively detected by the device using nanochemical oscillator The detection sensitivity is in the order of a single bacterium corresponding to a mass of ~1pg
- 11. FOR CANCERDIAGNOSIS When thecancer-associated molecules bind to the cantilevers, changes in surface tension cause the cantilever to bend The mass detection limitation of NEMS cantilevers is improved to the enumeration of a single DNA molecule consisting of ~1600base pairs and weighing ~1ag (atto =10^18).
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- 13. SIZE/SHAPE coatedwith strands ofDNA could detect molecules on the order of one part per million
- 14. PLATFORM The Nano sensorscould sniff molecules out of the air or taste them in a liquid, suggesting applications ranging from domestic security to medical detectors.
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