The Experts below are selected from a list of 672 Experts worldwide ranked by ideXlab platform

Babak Ziaie - One of the best experts on this subject based on the ideXlab platform.

  • highly stretchable potentiometric ph sensor fabricated via laser carbonization and machining of carbon polyaniline composite
    ACS Applied Materials & Interfaces, 2017
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Ali Tamayol, Shahla Khalili, Ali Khademhosseini, Babak Ziaie
    Abstract:

    The development of stretchable sensors has recently attracted considerable attention. These sensors have been used in wearable and robotics applications, such as personalized health-monitoring, motion detection, and human–machine interfaces. Herein, we report on a highly stretchable electrochemical pH sensor for wearable point-of-care applications that consists of a pH-sensitive working electrode and a liquid-junction-free reference electrode, in which the stretchable conductive interconnections are fabricated by laser carbonizing and micromachining of a Polyimide Sheet bonded to an Ecoflex substrate. This method produces highly porous carbonized 2D serpentine traces that are subsequently permeated with polyaniline (PANI) as the conductive filler, binding material, and pH-sensitive membrane. The experimental and simulation results demonstrate that the stretchable serpentine PANI/C–PI interconnections with an optimal trace width of 0.3 mm can withstand elongations of up to 135% and are robust to more than ...

  • Highly Stretchable Potentiometric pH Sensor Fabricated via Laser Carbonization and Machining of Carbon−Polyaniline Composite
    2017
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Ali Tamayol, Shahla Khalili, Ali Khademhosseini, Babak Ziaie
    Abstract:

    The development of stretchable sensors has recently attracted considerable attention. These sensors have been used in wearable and robotics applications, such as personalized health-monitoring, motion detection, and human–machine interfaces. Herein, we report on a highly stretchable electrochemical pH sensor for wearable point-of-care applications that consists of a pH-sensitive working electrode and a liquid-junction-free reference electrode, in which the stretchable conductive interconnections are fabricated by laser carbonizing and micromachining of a Polyimide Sheet bonded to an Ecoflex substrate. This method produces highly porous carbonized 2D serpentine traces that are subsequently permeated with polyaniline (PANI) as the conductive filler, binding material, and pH-sensitive membrane. The experimental and simulation results demonstrate that the stretchable serpentine PANI/C–PI interconnections with an optimal trace width of 0.3 mm can withstand elongations of up to 135% and are robust to more than 12 000 stretch-and-release cycles at 20% strain without noticeable change in the resistance. The pH sensor displays a linear sensitivity of −53 mV/pH (r2 = 0.976) with stable performance in the physiological range of pH 4–10. The sensor shows excellent stability to applied longitudinal and transverse strains up to 100% in different pH buffer solutions with a minimal deviation of less than ±4 mV. The material biocompatibility is confirmed with NIH 3T3 fibroblast cells via PrestoBlue assays

  • direct laser writing of porous carbon silver nanocomposite for flexible electronics
    ACS Applied Materials & Interfaces, 2016
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Babak Ziaie
    Abstract:

    In this Research Article, we demonstrate a facile method for the fabrication of porous-carbon/silver nanocomposites using direct laser writing on polymeric substrates. Our technique uses a combination of CO2 laser-induced carbonization and selective silver deposition on a Polyimide Sheet to create flexible highly conductive traces. The localized laser irradiation selectively converts the Polyimide to a highly porous and conductive carbonized film with superhydrophilic wettability. The resulting pattern allows for selective trapping of aqueous silver ionic ink solutions into the carbonized regions, which are converted to silver nanoparticle fillers upon an annealing step. Elemental and surface morphology analysis via XRD and SEM reveals a uniform coating of Ag nanoparticles on the porous carbon. The Ag/C composite lowers the Sheet resistance of the original laser carbonized Polyimide from 50 to 0.02 Ω/□. The resulting patterns are flexible and electromechanically robust with less than 0.6 Ω variation in re...

  • Direct Laser Writing of Porous-Carbon/Silver Nanocomposite for Flexible Electronics
    2016
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Babak Ziaie
    Abstract:

    In this Research Article, we demonstrate a facile method for the fabrication of porous-carbon/silver nanocomposites using direct laser writing on polymeric substrates. Our technique uses a combination of CO2 laser-induced carbonization and selective silver deposition on a Polyimide Sheet to create flexible highly conductive traces. The localized laser irradiation selectively converts the Polyimide to a highly porous and conductive carbonized film with superhydrophilic wettability. The resulting pattern allows for selective trapping of aqueous silver ionic ink solutions into the carbonized regions, which are converted to silver nanoparticle fillers upon an annealing step. Elemental and surface morphology analysis via XRD and SEM reveals a uniform coating of Ag nanoparticles on the porous carbon. The Ag/C composite lowers the Sheet resistance of the original laser carbonized Polyimide from 50 to 0.02 Ω/□. The resulting patterns are flexible and electromechanically robust with less than 0.6 Ω variation in resistance after >15000 bending flexion cycles at a radius of curvature of 5 mm. Furthermore, using this technique, we demonstrate the fabrication of a wireless resonant pressure sensor capable of detecting pressures ranging from 0 to 97 kPa with an average sensitivity of −26 kHz/kPa

Rahim Rahimi - One of the best experts on this subject based on the ideXlab platform.

  • highly stretchable potentiometric ph sensor fabricated via laser carbonization and machining of carbon polyaniline composite
    ACS Applied Materials & Interfaces, 2017
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Ali Tamayol, Shahla Khalili, Ali Khademhosseini, Babak Ziaie
    Abstract:

    The development of stretchable sensors has recently attracted considerable attention. These sensors have been used in wearable and robotics applications, such as personalized health-monitoring, motion detection, and human–machine interfaces. Herein, we report on a highly stretchable electrochemical pH sensor for wearable point-of-care applications that consists of a pH-sensitive working electrode and a liquid-junction-free reference electrode, in which the stretchable conductive interconnections are fabricated by laser carbonizing and micromachining of a Polyimide Sheet bonded to an Ecoflex substrate. This method produces highly porous carbonized 2D serpentine traces that are subsequently permeated with polyaniline (PANI) as the conductive filler, binding material, and pH-sensitive membrane. The experimental and simulation results demonstrate that the stretchable serpentine PANI/C–PI interconnections with an optimal trace width of 0.3 mm can withstand elongations of up to 135% and are robust to more than ...

  • Highly Stretchable Potentiometric pH Sensor Fabricated via Laser Carbonization and Machining of Carbon−Polyaniline Composite
    2017
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Ali Tamayol, Shahla Khalili, Ali Khademhosseini, Babak Ziaie
    Abstract:

    The development of stretchable sensors has recently attracted considerable attention. These sensors have been used in wearable and robotics applications, such as personalized health-monitoring, motion detection, and human–machine interfaces. Herein, we report on a highly stretchable electrochemical pH sensor for wearable point-of-care applications that consists of a pH-sensitive working electrode and a liquid-junction-free reference electrode, in which the stretchable conductive interconnections are fabricated by laser carbonizing and micromachining of a Polyimide Sheet bonded to an Ecoflex substrate. This method produces highly porous carbonized 2D serpentine traces that are subsequently permeated with polyaniline (PANI) as the conductive filler, binding material, and pH-sensitive membrane. The experimental and simulation results demonstrate that the stretchable serpentine PANI/C–PI interconnections with an optimal trace width of 0.3 mm can withstand elongations of up to 135% and are robust to more than 12 000 stretch-and-release cycles at 20% strain without noticeable change in the resistance. The pH sensor displays a linear sensitivity of −53 mV/pH (r2 = 0.976) with stable performance in the physiological range of pH 4–10. The sensor shows excellent stability to applied longitudinal and transverse strains up to 100% in different pH buffer solutions with a minimal deviation of less than ±4 mV. The material biocompatibility is confirmed with NIH 3T3 fibroblast cells via PrestoBlue assays

  • direct laser writing of porous carbon silver nanocomposite for flexible electronics
    ACS Applied Materials & Interfaces, 2016
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Babak Ziaie
    Abstract:

    In this Research Article, we demonstrate a facile method for the fabrication of porous-carbon/silver nanocomposites using direct laser writing on polymeric substrates. Our technique uses a combination of CO2 laser-induced carbonization and selective silver deposition on a Polyimide Sheet to create flexible highly conductive traces. The localized laser irradiation selectively converts the Polyimide to a highly porous and conductive carbonized film with superhydrophilic wettability. The resulting pattern allows for selective trapping of aqueous silver ionic ink solutions into the carbonized regions, which are converted to silver nanoparticle fillers upon an annealing step. Elemental and surface morphology analysis via XRD and SEM reveals a uniform coating of Ag nanoparticles on the porous carbon. The Ag/C composite lowers the Sheet resistance of the original laser carbonized Polyimide from 50 to 0.02 Ω/□. The resulting patterns are flexible and electromechanically robust with less than 0.6 Ω variation in re...

  • Direct Laser Writing of Porous-Carbon/Silver Nanocomposite for Flexible Electronics
    2016
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Babak Ziaie
    Abstract:

    In this Research Article, we demonstrate a facile method for the fabrication of porous-carbon/silver nanocomposites using direct laser writing on polymeric substrates. Our technique uses a combination of CO2 laser-induced carbonization and selective silver deposition on a Polyimide Sheet to create flexible highly conductive traces. The localized laser irradiation selectively converts the Polyimide to a highly porous and conductive carbonized film with superhydrophilic wettability. The resulting pattern allows for selective trapping of aqueous silver ionic ink solutions into the carbonized regions, which are converted to silver nanoparticle fillers upon an annealing step. Elemental and surface morphology analysis via XRD and SEM reveals a uniform coating of Ag nanoparticles on the porous carbon. The Ag/C composite lowers the Sheet resistance of the original laser carbonized Polyimide from 50 to 0.02 Ω/□. The resulting patterns are flexible and electromechanically robust with less than 0.6 Ω variation in resistance after >15000 bending flexion cycles at a radius of curvature of 5 mm. Furthermore, using this technique, we demonstrate the fabrication of a wireless resonant pressure sensor capable of detecting pressures ranging from 0 to 97 kPa with an average sensitivity of −26 kHz/kPa

Manuel Ochoa - One of the best experts on this subject based on the ideXlab platform.

  • highly stretchable potentiometric ph sensor fabricated via laser carbonization and machining of carbon polyaniline composite
    ACS Applied Materials & Interfaces, 2017
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Ali Tamayol, Shahla Khalili, Ali Khademhosseini, Babak Ziaie
    Abstract:

    The development of stretchable sensors has recently attracted considerable attention. These sensors have been used in wearable and robotics applications, such as personalized health-monitoring, motion detection, and human–machine interfaces. Herein, we report on a highly stretchable electrochemical pH sensor for wearable point-of-care applications that consists of a pH-sensitive working electrode and a liquid-junction-free reference electrode, in which the stretchable conductive interconnections are fabricated by laser carbonizing and micromachining of a Polyimide Sheet bonded to an Ecoflex substrate. This method produces highly porous carbonized 2D serpentine traces that are subsequently permeated with polyaniline (PANI) as the conductive filler, binding material, and pH-sensitive membrane. The experimental and simulation results demonstrate that the stretchable serpentine PANI/C–PI interconnections with an optimal trace width of 0.3 mm can withstand elongations of up to 135% and are robust to more than ...

  • Highly Stretchable Potentiometric pH Sensor Fabricated via Laser Carbonization and Machining of Carbon−Polyaniline Composite
    2017
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Ali Tamayol, Shahla Khalili, Ali Khademhosseini, Babak Ziaie
    Abstract:

    The development of stretchable sensors has recently attracted considerable attention. These sensors have been used in wearable and robotics applications, such as personalized health-monitoring, motion detection, and human–machine interfaces. Herein, we report on a highly stretchable electrochemical pH sensor for wearable point-of-care applications that consists of a pH-sensitive working electrode and a liquid-junction-free reference electrode, in which the stretchable conductive interconnections are fabricated by laser carbonizing and micromachining of a Polyimide Sheet bonded to an Ecoflex substrate. This method produces highly porous carbonized 2D serpentine traces that are subsequently permeated with polyaniline (PANI) as the conductive filler, binding material, and pH-sensitive membrane. The experimental and simulation results demonstrate that the stretchable serpentine PANI/C–PI interconnections with an optimal trace width of 0.3 mm can withstand elongations of up to 135% and are robust to more than 12 000 stretch-and-release cycles at 20% strain without noticeable change in the resistance. The pH sensor displays a linear sensitivity of −53 mV/pH (r2 = 0.976) with stable performance in the physiological range of pH 4–10. The sensor shows excellent stability to applied longitudinal and transverse strains up to 100% in different pH buffer solutions with a minimal deviation of less than ±4 mV. The material biocompatibility is confirmed with NIH 3T3 fibroblast cells via PrestoBlue assays

  • direct laser writing of porous carbon silver nanocomposite for flexible electronics
    ACS Applied Materials & Interfaces, 2016
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Babak Ziaie
    Abstract:

    In this Research Article, we demonstrate a facile method for the fabrication of porous-carbon/silver nanocomposites using direct laser writing on polymeric substrates. Our technique uses a combination of CO2 laser-induced carbonization and selective silver deposition on a Polyimide Sheet to create flexible highly conductive traces. The localized laser irradiation selectively converts the Polyimide to a highly porous and conductive carbonized film with superhydrophilic wettability. The resulting pattern allows for selective trapping of aqueous silver ionic ink solutions into the carbonized regions, which are converted to silver nanoparticle fillers upon an annealing step. Elemental and surface morphology analysis via XRD and SEM reveals a uniform coating of Ag nanoparticles on the porous carbon. The Ag/C composite lowers the Sheet resistance of the original laser carbonized Polyimide from 50 to 0.02 Ω/□. The resulting patterns are flexible and electromechanically robust with less than 0.6 Ω variation in re...

  • Direct Laser Writing of Porous-Carbon/Silver Nanocomposite for Flexible Electronics
    2016
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Babak Ziaie
    Abstract:

    In this Research Article, we demonstrate a facile method for the fabrication of porous-carbon/silver nanocomposites using direct laser writing on polymeric substrates. Our technique uses a combination of CO2 laser-induced carbonization and selective silver deposition on a Polyimide Sheet to create flexible highly conductive traces. The localized laser irradiation selectively converts the Polyimide to a highly porous and conductive carbonized film with superhydrophilic wettability. The resulting pattern allows for selective trapping of aqueous silver ionic ink solutions into the carbonized regions, which are converted to silver nanoparticle fillers upon an annealing step. Elemental and surface morphology analysis via XRD and SEM reveals a uniform coating of Ag nanoparticles on the porous carbon. The Ag/C composite lowers the Sheet resistance of the original laser carbonized Polyimide from 50 to 0.02 Ω/□. The resulting patterns are flexible and electromechanically robust with less than 0.6 Ω variation in resistance after >15000 bending flexion cycles at a radius of curvature of 5 mm. Furthermore, using this technique, we demonstrate the fabrication of a wireless resonant pressure sensor capable of detecting pressures ranging from 0 to 97 kPa with an average sensitivity of −26 kHz/kPa

Shahla Khalili - One of the best experts on this subject based on the ideXlab platform.

  • highly stretchable potentiometric ph sensor fabricated via laser carbonization and machining of carbon polyaniline composite
    ACS Applied Materials & Interfaces, 2017
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Ali Tamayol, Shahla Khalili, Ali Khademhosseini, Babak Ziaie
    Abstract:

    The development of stretchable sensors has recently attracted considerable attention. These sensors have been used in wearable and robotics applications, such as personalized health-monitoring, motion detection, and human–machine interfaces. Herein, we report on a highly stretchable electrochemical pH sensor for wearable point-of-care applications that consists of a pH-sensitive working electrode and a liquid-junction-free reference electrode, in which the stretchable conductive interconnections are fabricated by laser carbonizing and micromachining of a Polyimide Sheet bonded to an Ecoflex substrate. This method produces highly porous carbonized 2D serpentine traces that are subsequently permeated with polyaniline (PANI) as the conductive filler, binding material, and pH-sensitive membrane. The experimental and simulation results demonstrate that the stretchable serpentine PANI/C–PI interconnections with an optimal trace width of 0.3 mm can withstand elongations of up to 135% and are robust to more than ...

  • Highly Stretchable Potentiometric pH Sensor Fabricated via Laser Carbonization and Machining of Carbon−Polyaniline Composite
    2017
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Ali Tamayol, Shahla Khalili, Ali Khademhosseini, Babak Ziaie
    Abstract:

    The development of stretchable sensors has recently attracted considerable attention. These sensors have been used in wearable and robotics applications, such as personalized health-monitoring, motion detection, and human–machine interfaces. Herein, we report on a highly stretchable electrochemical pH sensor for wearable point-of-care applications that consists of a pH-sensitive working electrode and a liquid-junction-free reference electrode, in which the stretchable conductive interconnections are fabricated by laser carbonizing and micromachining of a Polyimide Sheet bonded to an Ecoflex substrate. This method produces highly porous carbonized 2D serpentine traces that are subsequently permeated with polyaniline (PANI) as the conductive filler, binding material, and pH-sensitive membrane. The experimental and simulation results demonstrate that the stretchable serpentine PANI/C–PI interconnections with an optimal trace width of 0.3 mm can withstand elongations of up to 135% and are robust to more than 12 000 stretch-and-release cycles at 20% strain without noticeable change in the resistance. The pH sensor displays a linear sensitivity of −53 mV/pH (r2 = 0.976) with stable performance in the physiological range of pH 4–10. The sensor shows excellent stability to applied longitudinal and transverse strains up to 100% in different pH buffer solutions with a minimal deviation of less than ±4 mV. The material biocompatibility is confirmed with NIH 3T3 fibroblast cells via PrestoBlue assays

Ali Tamayol - One of the best experts on this subject based on the ideXlab platform.

  • highly stretchable potentiometric ph sensor fabricated via laser carbonization and machining of carbon polyaniline composite
    ACS Applied Materials & Interfaces, 2017
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Ali Tamayol, Shahla Khalili, Ali Khademhosseini, Babak Ziaie
    Abstract:

    The development of stretchable sensors has recently attracted considerable attention. These sensors have been used in wearable and robotics applications, such as personalized health-monitoring, motion detection, and human–machine interfaces. Herein, we report on a highly stretchable electrochemical pH sensor for wearable point-of-care applications that consists of a pH-sensitive working electrode and a liquid-junction-free reference electrode, in which the stretchable conductive interconnections are fabricated by laser carbonizing and micromachining of a Polyimide Sheet bonded to an Ecoflex substrate. This method produces highly porous carbonized 2D serpentine traces that are subsequently permeated with polyaniline (PANI) as the conductive filler, binding material, and pH-sensitive membrane. The experimental and simulation results demonstrate that the stretchable serpentine PANI/C–PI interconnections with an optimal trace width of 0.3 mm can withstand elongations of up to 135% and are robust to more than ...

  • Highly Stretchable Potentiometric pH Sensor Fabricated via Laser Carbonization and Machining of Carbon−Polyaniline Composite
    2017
    Co-Authors: Rahim Rahimi, Manuel Ochoa, Ali Tamayol, Shahla Khalili, Ali Khademhosseini, Babak Ziaie
    Abstract:

    The development of stretchable sensors has recently attracted considerable attention. These sensors have been used in wearable and robotics applications, such as personalized health-monitoring, motion detection, and human–machine interfaces. Herein, we report on a highly stretchable electrochemical pH sensor for wearable point-of-care applications that consists of a pH-sensitive working electrode and a liquid-junction-free reference electrode, in which the stretchable conductive interconnections are fabricated by laser carbonizing and micromachining of a Polyimide Sheet bonded to an Ecoflex substrate. This method produces highly porous carbonized 2D serpentine traces that are subsequently permeated with polyaniline (PANI) as the conductive filler, binding material, and pH-sensitive membrane. The experimental and simulation results demonstrate that the stretchable serpentine PANI/C–PI interconnections with an optimal trace width of 0.3 mm can withstand elongations of up to 135% and are robust to more than 12 000 stretch-and-release cycles at 20% strain without noticeable change in the resistance. The pH sensor displays a linear sensitivity of −53 mV/pH (r2 = 0.976) with stable performance in the physiological range of pH 4–10. The sensor shows excellent stability to applied longitudinal and transverse strains up to 100% in different pH buffer solutions with a minimal deviation of less than ±4 mV. The material biocompatibility is confirmed with NIH 3T3 fibroblast cells via PrestoBlue assays