公开(公告)号：US20200166494A1

公开(公告)日：2020-05-28

申请号：US16580683

申请日：2019-09-24

Applicant: Research Triangle Institute

Inventor： David S. Ensor ,  Li Han

IPC: G01N33/00 ,  G01N27/22 ,  G01N27/12

Abstract: A chemical sensor and a system and method for sensing a chemical species. The chemical sensor includes a plurality of nanofibers whose electrical impedance varies upon exposure to the chemical species, a substrate supporting and electrically isolating the fibers, a set of electrodes connected to the plurality of fibers at spatially separated points to permit the electrical impedance of the plurality of fibers to be measured, and a membrane encasing the fibers and having a thickness ranging from 50 μm to 5.0 mm. The system includes the chemical sensor, an impedance measuring device coupled to the electrodes and configured to determine an electrical impedance of the plurality of fibers, and an analyzer configured to identify the chemical species based on a change in the electrical impedance. The method measures at least one change in an electrical impedance between spatially separated electrodes connected to a plurality of fibers upon exposure of the fibers to the chemical species, and identifies the chemical species based on the measured change in the electrical impedance.

公开(公告)号：US20130308334A1

公开(公告)日：2013-11-21

申请号：US13938754

申请日：2013-07-10

Applicant: RESEARCH TRIANGLE INSTITUTE

Inventor： James Lynn DAVIS ,  Anthony L. Andrady ,  David S. Ensor ,  Li Han ,  Howard J. Walls

IPC: F21V8/00

CPC classification number: G02B6/0008 ,  C09K11/565 ,  C09K11/883 ,  D01D5/0007 ,  D01F11/00 ,  D04H1/413 ,  D04H1/42 ,  D04H1/4382 ,  D06M11/52 ,  H01L33/501 ,  H01L2924/0002 ,  H01L2924/00

Abstract: A device for stimulable light emission that includes a fiber mat of nanofibers having an average fiber diameter in a range between 100 and 2000 nm, and includes plural stimulable particles disposed in association with the nanofibers. The stimulable particles produce secondary light emission upon receiving primary light at a wavelength λ. The average fiber diameter is comparable in size to the wavelength λ in order to provide scattering sites within the fiber mat for the primary light. Various methods for making suitable luminescent nanofiber mats include: electrospinning a polymer solution including or not including the stimulable particles and forming from the electrospun solution nanofibers having an average fiber diameter between 100 and 2000 nm. Methods, which electrospin without the stimulable particles, introduce the stimulable particles during electrospinning or after electrospinning to the fibers and therefore to the resultant fiber mat.

Abstract translation: 一种可刺激发光的装置，其包括平均纤维直径在100和2000nm之间的纳米纤维的纤维垫，并且包括与纳米纤维相关联地设置的多个可刺激的颗粒。 可接受的颗粒在接收波长λ的原始光时产生二次发光。 平均纤维直径在尺寸上与波长λ相当，以便为初级光提供纤维垫内的散射部位。 用于制备合适的发光纳米纤维毡的各种方法包括：将包含或不包含可刺激颗粒的聚合物溶液静电纺丝并由平均纤维直径在100和2000nm之间的电纺丝溶液纳米纤维形成。 没有刺激性颗粒的静电纺丝的方法是在静电纺丝过程中或静电纺丝后引入可刺激的颗粒到纤维上，从而导致所得的纤维垫。

公开(公告)号：US20210181172A1

公开(公告)日：2021-06-17

申请号：US17032614

申请日：2020-09-25

Applicant: Research Triangle Institute

Inventor： David S. Ensor ,  Li Han

IPC: G01N33/00 ,  G01N27/12 ,  G01N27/22

Abstract: A chemical sensor and a system and method for sensing a chemical species. The chemical sensor includes a plurality of nanofibers whose electrical impedance varies upon exposure to the chemical species, a substrate supporting and electrically isolating the fibers, a set of electrodes connected to the plurality of fibers at spatially separated points to permit the electrical impedance of the plurality of fibers to be measured, and a membrane encasing the fibers and having a thickness ranging from 50 μm to 5.0 mm. The system includes the chemical sensor, an impedance measuring device coupled to the electrodes and configured to determine an electrical impedance of the plurality of fibers, and an analyzer configured to identify the chemical species based on a change in the electrical impedance.

公开(公告)号：US11714075B2

公开(公告)日：2023-08-01

申请号：US17032614

申请日：2020-09-25

Applicant: Research Triangle Institute

Inventor： David S. Ensor ,  Li Han

IPC: G01N33/00 ,  G01N27/12 ,  G01N27/22

CPC classification number: G01N33/0047 ,  G01N27/127 ,  G01N27/227

Abstract: A chemical sensor and a system and method for sensing a chemical species. The chemical sensor includes a plurality of nanofibers whose electrical impedance varies upon exposure to the chemical species, a substrate supporting and electrically isolating the fibers, a set of electrodes connected to the plurality of fibers at spatially separated points to permit the electrical impedance of the plurality of fibers to be measured, and a membrane encasing the fibers and having a thickness ranging from 50 μm to 5.0 mm. The system includes the chemical sensor, an impedance measuring device coupled to the electrodes and configured to determine an electrical impedance of the plurality of fibers, and an analyzer configured to identify the chemical species based on a change in the electrical impedance.

公开(公告)号：US08847487B2

公开(公告)日：2014-09-30

申请号：US13938754

申请日：2013-07-10

Applicant: Research Triangle Institute

Inventor： James Lynn Davis ,  Anthony L. Andrady ,  David S. Ensor ,  Li Han ,  Howard J. Walls

IPC: F21V8/00 ,  D01D5/00 ,  D04H1/42 ,  D01F11/00 ,  D06M11/52 ,  H01L33/50

CPC classification number: G02B6/0008 ,  C09K11/565 ,  C09K11/883 ,  D01D5/0007 ,  D01F11/00 ,  D04H1/413 ,  D04H1/42 ,  D04H1/4382 ,  D06M11/52 ,  H01L33/501 ,  H01L2924/0002 ,  H01L2924/00

Abstract: A device for stimulable light emission that includes a fiber mat of nanofibers having an average fiber diameter in a range between 100 and 2000 nm, and includes plural stimulable particles disposed in association with the nanofibers. The stimulable particles produce secondary light emission upon receiving primary light at a wavelength λ. The average fiber diameter is comparable in size to the wavelength λ in order to provide scattering sites within the fiber mat for the primary light. Various methods for making suitable luminescent nanofiber mats include: electrospinning a polymer solution including or not including the stimulable particles and forming from the electrospun solution nanofibers having an average fiber diameter between 100 and 2000 nm. Methods, which electrospin without the stimulable particles, introduce the stimulable particles during electrospinning or after electrospinning to the fibers and therefore to the resultant fiber mat.

Abstract translation: 一种可刺激发光的装置，其包括平均纤维直径在100和2000nm之间的纳米纤维的纤维垫，并且包括与纳米纤维相关联地设置的多个可刺激的颗粒。 可接受的颗粒在接收波长为λ的原始光时产生二次发光。 平均纤维直径在尺寸上与波长λ相当，以便为初级光提供纤维垫内的散射部位。 用于制备合适的发光纳米纤维毡的各种方法包括：将包含或不包含可刺激颗粒的聚合物溶液静电纺丝并由平均纤维直径在100和2000nm之间的电纺丝溶液纳米纤维形成。 没有刺激性颗粒的静电纺丝的方法是在静电纺丝过程中或静电纺丝后引入可刺激的颗粒到纤维上，从而导致所得的纤维垫。