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Patent Agency Ranking
公开(公告)号：US09739709B2
公开(公告)日：2017-08-22
申请号：US14889839
申请日：2014-05-08
Inventor： Kevin Lear , Timothy Erickson
CPC classification number: G01N21/4133 , G01M11/33 , G01N33/1833 , G01N2021/4166 , G01N2201/0873 , G02B6/028 , G02B6/12004 , G02B6/1221 , G02B6/4291 , G02B27/56 , G02B2006/12123 , G02B2006/12138 , Y02A20/206
Abstract: A chip-scale, reusable sensor can detect aromatic hydrocarbons, such as benzene, toluene, ethylbenzene, and xylenes (BTEX), rapidly in water without sample preparation. The device is capable of real-time, continuous monitoring for BTEX solutes, which diffuse into a film, such as a polymer, on the sensors surface. In operation, BTEX analytes concentrate in the film, causing an increase in refractive index, which modulates evanescent coupling into the chips integrated photodetector array. Integration of the photodetector array simplifies system instrumentation and permits incorporation of an on-chip photocurrent reference region in the immediate vicinity of the sensing region, reducing drift due to temperature fluctuations. In some examples, the chip responds linearly for BTEX concentrations between 1 ppm and 30 ppm, with a limit of detection of 359 ppb, 249 ppb, and 103 ppb for benzene, toluene, and xylene in water, respectively.
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公开(公告)号：US20180113072A1
公开(公告)日：2018-04-26
申请号：US15847758
申请日：2017-12-19
Inventor： Kevin Lear , Timothy Erickson
CPC classification number: G01N21/4133 , G01M11/33 , G01N33/1833 , G01N2021/4166 , G01N2201/0873 , G02B6/028 , G02B6/12004 , G02B6/1221 , G02B6/4291 , G02B27/56 , G02B2006/12123 , G02B2006/12138 , Y02A20/206
Abstract: A chip-scale, reusable sensor can detect aromatic hydrocarbons, such as benzene, toluene, ethylbenzene, and xylenes (BTEX), rapidly in water without sample preparation. The device is capable of real-time, continuous monitoring for BTEX solutes, which diffuse into a film, such as a polymer, on the sensors surface. In operation BTEX analytes concentrate in the film, causing an increase in refractive index, which modulates evanescent coupling into the chips integrated photodetector array. Integration of the photodetector array simplifies system instrumentation and permits incorporation of an on-chip photocurrent reference region in the immediate vicinity of the sensing region, reducing drift due to temperature fluctuations. In some examples, the chip responds linearly for BTEX concentrations between 1 ppm and 30 ppm, with a limit of detection of 359 ppb, 249 ppb, and 103 ppb for benzene, toluene, and xylene in water, respectively.
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公开(公告)号：US20170212044A1
公开(公告)日：2017-07-27
申请号：US15478982
申请日：2017-04-04
Inventor： Kevin Lear , Timothy Erickson
CPC classification number: G01N21/4133 , G01M11/33 , G01N33/1833 , G01N2021/4166 , G01N2201/0873 , G02B6/028 , G02B6/12004 , G02B6/1221 , G02B6/4291 , G02B27/56 , G02B2006/12123 , G02B2006/12138 , Y02A20/206
Abstract: A chip-scale, reusable sensor can detect aromatic hydrocarbons, such as benzene, toluene, ethylbenzene, and xylenes (BTEX), rapidly in water without sample preparation. The device is capable of real-time, continuous monitoring for BTEX solutes, which diffuse into a film, such as a polymer, on the sensors surface. In operation, BTEX analytes concentrate in the film, causing an increase in refractive index, which modulates evanescent coupling into the chips integrated photodetector array. Integration of the photodetector array simplifies system instrumentation and permits incorporation of an on-chip photocurrent reference region in the immediate vicinity of the sensing region, reducing drift due to temperature fluctuations. In some examples, the chip responds linearly for BTEX concentrations between 1 ppm and 30 ppm, with a limit of detection of 359 ppb, 249 ppb, and 103 ppb for benzene, toluene, and xylene in water, respectively.
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公开(公告)号：US10175168B2
公开(公告)日：2019-01-08
申请号：US15847758
申请日：2017-12-19
Inventor： Kevin Lear , Timothy Erickson
IPC: G02B6/00 , G01N21/41 , G02B6/028 , G02B27/56 , G02B6/122 , G02B6/42 , G01M11/00 , G01N33/18 , G02B6/12
Abstract: A sensor for hydrocarbons uses a waveguide with a first cladding layer, a second cladding layer with a measurement region with hydrophobic measurement material, and a core between the first and second cladding layers. Light is coupled into the waveguide. The measurement material is exposed to the hydrocarbon allowing the hydrocarbon to diffuse into it and change refractive index of the material, which changes intensity of light evanescently coupled through the first cladding layer. Light coupled through the first cladding layer is measured to determine exposure of the sensor to the hydrocarbons.
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公开(公告)号：US09857299B2
公开(公告)日：2018-01-02
申请号：US15478982
申请日：2017-04-04
Inventor： Kevin Lear , Timothy Erickson
CPC classification number: G01N21/4133 , G01M11/33 , G01N33/1833 , G01N2021/4166 , G01N2201/0873 , G02B6/028 , G02B6/12004 , G02B6/1221 , G02B6/4291 , G02B27/56 , G02B2006/12123 , G02B2006/12138 , Y02A20/206
Abstract: A chip-scale, reusable sensor can detect aromatic hydrocarbons, such as benzene, toluene, ethylbenzene, and xylenes (BTEX), rapidly in water without sample preparation. The device is capable of real-time, continuous monitoring for BTEX solutes, which diffuse into a film, such as a polymer, on the sensors surface. In operation, BTEX analytes concentrate in the film, causing an increase in refractive index, which modulates evanescent coupling into the chips integrated photodetector array. Integration of the photodetector array simplifies system instrumentation and permits incorporation of an on-chip photocurrent reference region in the immediate vicinity of the sensing region, reducing drift due to temperature fluctuations. In some examples, the chip responds linearly for BTEX concentrations between 1 ppm and 30 ppm, with a limit of detection of 359 ppb, 249 ppb, and 103 ppb for benzene, toluene, and xylene in water, respectively.
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