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- Microwave_chemistry_sensor abstract "Microwave chemistry sensor or Surface acoustic wave (SAW) sensors consist of an input transducer, a chemically adsorbent polymer film, and an output transducer on a piezoelectric substrate, which is typically quartz. The input transducer launches an acoustic wave that travels through the chemical film and is detected by the output transducer. The Sandia-made device runs at a very high frequency (approximately 525 MHz), and the velocity and attenuation of the signal are sensitive to the viscoelasticity and mass of the thin film . SAWS have been able to distinguish organophosphates, chlorinated hydrocarbons, ketones, alcohols, aromatic hydrocarbons, saturated hydrocarbons, and water . The SAW used in these tests have four channels—each channel consists of a transmitter and a receiver, separated by a small distance. Three of the four channels have a polymer deposited on the substrate between the transmitter and receiver. The purpose of the polymers is to adsorb chemicals of interest, with different polymers having different affinities to various chemicals. When a chemical is adsorbed, the mass of the polymer increases, causing a slight change in phase of the acoustic signal relative to the reference (fourth) channel, which does not contain a polymer. The SAW device also contains three Application Specific Integrated Circuit chips (ASICs), which contain the electronics to analyze the signals and provide a DC voltage signal proportional to the phase shift. The SAW device, containing the transducers and ASICs, is bonded to a piece of quartz glass, which is placed in a leadless chip carrier (LCC). Wire bonds connect the terminals of the leadless chip carrier to the SAW circuits.".
- Microwave_chemistry_sensor wikiPageID "14230861".
- Microwave_chemistry_sensor wikiPageLength "2056".
- Microwave_chemistry_sensor wikiPageOutDegree "17".
- Microwave_chemistry_sensor wikiPageRevisionID "584520751".
- Microwave_chemistry_sensor wikiPageWikiLink Application-specific_integrated_circuit.
- Microwave_chemistry_sensor wikiPageWikiLink Category:Analytical_chemistry.
- Microwave_chemistry_sensor wikiPageWikiLink Category:Microwave_chemistry.
- Microwave_chemistry_sensor wikiPageWikiLink Category:Sensors.
- Microwave_chemistry_sensor wikiPageWikiLink Chemical_substance.
- Microwave_chemistry_sensor wikiPageWikiLink Chemoreceptor.
- Microwave_chemistry_sensor wikiPageWikiLink Film.
- Microwave_chemistry_sensor wikiPageWikiLink Frequency.
- Microwave_chemistry_sensor wikiPageWikiLink Fused_quartz.
- Microwave_chemistry_sensor wikiPageWikiLink Hertz.
- Microwave_chemistry_sensor wikiPageWikiLink Integrated_circuit.
- Microwave_chemistry_sensor wikiPageWikiLink Piezoelectricity.
- Microwave_chemistry_sensor wikiPageWikiLink Polymer.
- Microwave_chemistry_sensor wikiPageWikiLink Quartz.
- Microwave_chemistry_sensor wikiPageWikiLink Radio_receiver.
- Microwave_chemistry_sensor wikiPageWikiLink Surface_acoustic_wave.
- Microwave_chemistry_sensor wikiPageWikiLink Transmitter.
- Microwave_chemistry_sensor wikiPageWikiLinkText "Microwave chemistry sensor".
- Microwave_chemistry_sensor wikiPageUsesTemplate Template:Unreferenced.
- Microwave_chemistry_sensor subject Category:Analytical_chemistry.
- Microwave_chemistry_sensor subject Category:Microwave_chemistry.
- Microwave_chemistry_sensor subject Category:Sensors.
- Microwave_chemistry_sensor type Instrument.
- Microwave_chemistry_sensor type Instrument.
- Microwave_chemistry_sensor type Sensor.
- Microwave_chemistry_sensor type Transducer.
- Microwave_chemistry_sensor comment "Microwave chemistry sensor or Surface acoustic wave (SAW) sensors consist of an input transducer, a chemically adsorbent polymer film, and an output transducer on a piezoelectric substrate, which is typically quartz. The input transducer launches an acoustic wave that travels through the chemical film and is detected by the output transducer.".
- Microwave_chemistry_sensor label "Microwave chemistry sensor".
- Microwave_chemistry_sensor sameAs Q6840496.
- Microwave_chemistry_sensor sameAs m.03cyk43.
- Microwave_chemistry_sensor sameAs Q6840496.
- Microwave_chemistry_sensor wasDerivedFrom Microwave_chemistry_sensor?oldid=584520751.
- Microwave_chemistry_sensor isPrimaryTopicOf Microwave_chemistry_sensor.