The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Hubert H Girault - One of the best experts on this subject based on the ideXlab platform.
-
local study on hydrogen and hydrogen gas bubble formation on a Platinum Electrode
Journal of Physical Chemistry C, 2019Co-Authors: Alberto Battistel, Christopher R Dennison, Andreas Lesch, Hubert H GiraultAbstract:This work investigates the effect of current density on the hydrogen gas bubble formation during electrolysis on a Platinum Electrode. Local detection of bubble evolution was performed electrochemi...
-
local study on hydrogen and hydrogen gas bubble formation on a Platinum Electrode
The Journal of Physical Chemistry, 2019Co-Authors: Alberto Battistel, Christopher R Dennison, Andreas Lesch, Hubert H GiraultAbstract:This work investigates the effect of current density on the hydrogen gas bubble formation during electrolysis on a Platinum Electrode. Local detection of bubble evolution was performed electrochemically by using a hydrogen-collecting microElectrode placed in close proximity of a larger hydrogen-generating Platinum Electrode. The microElectrode probe locally measured the concentration of dissolved molecular hydrogen produced during electrolysis. In acidic conditions, it was found that at low electrolysis currents the concentration of dissolved hydrogen could temporarily rise up to 50 times the saturation level, while once a large current was reached, the concentration dropped, increasing the concentration of hydrogen inside gas bubbles, and became independent of the current. Through laser reflectance, the onset of bubble formation was found (∼−0.7 mA/cm²), which was lower than the first bubble observable by naked eye or detected by the microElectrode probe.
Xia Zhong - One of the best experts on this subject based on the ideXlab platform.
-
a novel immunosensor based on immobilization of hepatitis b surface antibody on Platinum Electrode modified colloidal gold and polyvinyl butyral as matrices via electrochemical impedance spectroscopy
Bioelectrochemistry, 2004Co-Authors: Dianping Tang, Ruo Yuan, Yaqin Chai, Xia ZhongAbstract:Hepatitis B surface antibody (HBsAb) was immobilized to the surface of Platinum Electrode modified with colloidal gold and polyvinyl butyral (PVB) as matrices to detect hepatitis B surface antigen (HBsAg) via electrochemical impedance spectroscopy (EIS). The electrochemical measurements of cyclic voltammetry and impedance spectroscopy showed that K4[Fe(CN)6]/K3[Fe(CN)6] reactions on the Platinum Electrode surface were blocked due to the procedures of self-assembly of HBsAb-Au-PVB. The binding of a specific HBsAb to HBsAg recognition layer could be detected by measurements of the impedance change. A new strategy was introduced for improving the sensitivity of impedance measurements via the large specific surface area and high surface free energy of Au nanoparticles and the encapsulated effect of polyvinyl butyral. The results showed that this strategy caused dramatic improvement of the detection sensitivity of HBsAg and had good linear response to detect HBsAg in the range of 20–160 ng·ml−1 with a detection limit of 7.8 ng·ml−1. Moreover, the studied immunosensor exhibited high sensitivity and long-term stability.
-
A novel immunosensor based on immobilization of hepatitis B surface antibody on Platinum Electrode modified colloidal gold and polyvinyl butyral as matrices via electrochemical impedance spectroscopy.
Bioelectrochemistry, 2004Co-Authors: Dianping Tang, Ruo Yuan, Yaqin Chai, Xia Zhong, Jianyuan Dai, Yan LiuAbstract:Hepatitis B surface antibody (HBsAb) was immobilized to the surface of Platinum Electrode modified with colloidal gold and polyvinyl butyral (PVB) as matrices to detect hepatitis B surface antigen (HBsAg) via electrochemical impedance spectroscopy (EIS). The electrochemical measurements of cyclic voltammetry and impedance spectroscopy showed that K4[Fe(CN)6]/K3[Fe(CN)6] reactions on the Platinum Electrode surface were blocked due to the procedures of self-assembly of HBsAb-Au-PVB. The binding of a specific HBsAb to HBsAg recognition layer could be detected by measurements of the impedance change. A new strategy was introduced for improving the sensitivity of impedance measurements via the large specific surface area and high surface free energy of Au nanoparticles and the encapsulated effect of polyvinyl butyral. The results showed that this strategy caused dramatic improvement of the detection sensitivity of HBsAg and had good linear response to detect HBsAg in the range of 20–160 ng·ml−1 with a detection limit of 7.8 ng·ml−1. Moreover, the studied immunosensor exhibited high sensitivity and long-term stability.
-
ultrasensitive potentiometric immunosensor based on sa and oca techniques for immobilization of hbsab with colloidal au and polyvinyl butyral as matrixes
Langmuir, 2004Co-Authors: Ruo Yuan, Dianping Tang, Yaqin Chai, Xia Zhong, Yan Liu, Jianyuan DaiAbstract:A novel potentiometric immunosensor for detection of hepatitis B surface antigen (HBsAg) has been developed by means of self-assembly (SA) and opposite-charged adsorption (OCA) techniques to immobilize hepatitis B surface antibody (HBsAb) on a Platinum Electrode. A cleaned Platinum Electrode was first pretreated in the presence of 10% HNO3 and 2.5% K2CrO4 solution and held at -1.5 V (vs SCE) for 1 min to make it negatively charged and then immersed in a mixing solution containing hepatitis B surface antibody, colloidal gold (Au), and polyvinyl butyral (PVB). Finally, HBsAb was successfully immobilized onto the surface of the negatively charged Platinum Electrode modified nanosized gold and PVB sol-gel matrixes. The modified procedure was characterized by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The immobilized hepatitis B surface antibody exhibited direct electrochemical behavior toward hepatitis B surface antigen (HBsAg). The performance and factors influencing the performance of the resulting immunosensor were studied in detail. More than 95.7% of the results of the human serum samples obtained by this method were in agreement with those obtained by enzyme-linked immunosorbent assays (ELISAs). The resulting immunosensor exhibited fast potentiometric response ( 6 months).
Dianping Tang - One of the best experts on this subject based on the ideXlab platform.
-
a novel immunosensor based on immobilization of hepatitis b surface antibody on Platinum Electrode modified colloidal gold and polyvinyl butyral as matrices via electrochemical impedance spectroscopy
Bioelectrochemistry, 2004Co-Authors: Dianping Tang, Ruo Yuan, Yaqin Chai, Xia ZhongAbstract:Hepatitis B surface antibody (HBsAb) was immobilized to the surface of Platinum Electrode modified with colloidal gold and polyvinyl butyral (PVB) as matrices to detect hepatitis B surface antigen (HBsAg) via electrochemical impedance spectroscopy (EIS). The electrochemical measurements of cyclic voltammetry and impedance spectroscopy showed that K4[Fe(CN)6]/K3[Fe(CN)6] reactions on the Platinum Electrode surface were blocked due to the procedures of self-assembly of HBsAb-Au-PVB. The binding of a specific HBsAb to HBsAg recognition layer could be detected by measurements of the impedance change. A new strategy was introduced for improving the sensitivity of impedance measurements via the large specific surface area and high surface free energy of Au nanoparticles and the encapsulated effect of polyvinyl butyral. The results showed that this strategy caused dramatic improvement of the detection sensitivity of HBsAg and had good linear response to detect HBsAg in the range of 20–160 ng·ml−1 with a detection limit of 7.8 ng·ml−1. Moreover, the studied immunosensor exhibited high sensitivity and long-term stability.
-
A novel immunosensor based on immobilization of hepatitis B surface antibody on Platinum Electrode modified colloidal gold and polyvinyl butyral as matrices via electrochemical impedance spectroscopy.
Bioelectrochemistry, 2004Co-Authors: Dianping Tang, Ruo Yuan, Yaqin Chai, Xia Zhong, Jianyuan Dai, Yan LiuAbstract:Hepatitis B surface antibody (HBsAb) was immobilized to the surface of Platinum Electrode modified with colloidal gold and polyvinyl butyral (PVB) as matrices to detect hepatitis B surface antigen (HBsAg) via electrochemical impedance spectroscopy (EIS). The electrochemical measurements of cyclic voltammetry and impedance spectroscopy showed that K4[Fe(CN)6]/K3[Fe(CN)6] reactions on the Platinum Electrode surface were blocked due to the procedures of self-assembly of HBsAb-Au-PVB. The binding of a specific HBsAb to HBsAg recognition layer could be detected by measurements of the impedance change. A new strategy was introduced for improving the sensitivity of impedance measurements via the large specific surface area and high surface free energy of Au nanoparticles and the encapsulated effect of polyvinyl butyral. The results showed that this strategy caused dramatic improvement of the detection sensitivity of HBsAg and had good linear response to detect HBsAg in the range of 20–160 ng·ml−1 with a detection limit of 7.8 ng·ml−1. Moreover, the studied immunosensor exhibited high sensitivity and long-term stability.
-
ultrasensitive potentiometric immunosensor based on sa and oca techniques for immobilization of hbsab with colloidal au and polyvinyl butyral as matrixes
Langmuir, 2004Co-Authors: Ruo Yuan, Dianping Tang, Yaqin Chai, Xia Zhong, Yan Liu, Jianyuan DaiAbstract:A novel potentiometric immunosensor for detection of hepatitis B surface antigen (HBsAg) has been developed by means of self-assembly (SA) and opposite-charged adsorption (OCA) techniques to immobilize hepatitis B surface antibody (HBsAb) on a Platinum Electrode. A cleaned Platinum Electrode was first pretreated in the presence of 10% HNO3 and 2.5% K2CrO4 solution and held at -1.5 V (vs SCE) for 1 min to make it negatively charged and then immersed in a mixing solution containing hepatitis B surface antibody, colloidal gold (Au), and polyvinyl butyral (PVB). Finally, HBsAb was successfully immobilized onto the surface of the negatively charged Platinum Electrode modified nanosized gold and PVB sol-gel matrixes. The modified procedure was characterized by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The immobilized hepatitis B surface antibody exhibited direct electrochemical behavior toward hepatitis B surface antigen (HBsAg). The performance and factors influencing the performance of the resulting immunosensor were studied in detail. More than 95.7% of the results of the human serum samples obtained by this method were in agreement with those obtained by enzyme-linked immunosorbent assays (ELISAs). The resulting immunosensor exhibited fast potentiometric response ( 6 months).
Andreas Lesch - One of the best experts on this subject based on the ideXlab platform.
-
local study on hydrogen and hydrogen gas bubble formation on a Platinum Electrode
Journal of Physical Chemistry C, 2019Co-Authors: Alberto Battistel, Christopher R Dennison, Andreas Lesch, Hubert H GiraultAbstract:This work investigates the effect of current density on the hydrogen gas bubble formation during electrolysis on a Platinum Electrode. Local detection of bubble evolution was performed electrochemi...
-
local study on hydrogen and hydrogen gas bubble formation on a Platinum Electrode
The Journal of Physical Chemistry, 2019Co-Authors: Alberto Battistel, Christopher R Dennison, Andreas Lesch, Hubert H GiraultAbstract:This work investigates the effect of current density on the hydrogen gas bubble formation during electrolysis on a Platinum Electrode. Local detection of bubble evolution was performed electrochemically by using a hydrogen-collecting microElectrode placed in close proximity of a larger hydrogen-generating Platinum Electrode. The microElectrode probe locally measured the concentration of dissolved molecular hydrogen produced during electrolysis. In acidic conditions, it was found that at low electrolysis currents the concentration of dissolved hydrogen could temporarily rise up to 50 times the saturation level, while once a large current was reached, the concentration dropped, increasing the concentration of hydrogen inside gas bubbles, and became independent of the current. Through laser reflectance, the onset of bubble formation was found (∼−0.7 mA/cm²), which was lower than the first bubble observable by naked eye or detected by the microElectrode probe.
Ruo Yuan - One of the best experts on this subject based on the ideXlab platform.
-
a novel immunosensor based on immobilization of hepatitis b surface antibody on Platinum Electrode modified colloidal gold and polyvinyl butyral as matrices via electrochemical impedance spectroscopy
Bioelectrochemistry, 2004Co-Authors: Dianping Tang, Ruo Yuan, Yaqin Chai, Xia ZhongAbstract:Hepatitis B surface antibody (HBsAb) was immobilized to the surface of Platinum Electrode modified with colloidal gold and polyvinyl butyral (PVB) as matrices to detect hepatitis B surface antigen (HBsAg) via electrochemical impedance spectroscopy (EIS). The electrochemical measurements of cyclic voltammetry and impedance spectroscopy showed that K4[Fe(CN)6]/K3[Fe(CN)6] reactions on the Platinum Electrode surface were blocked due to the procedures of self-assembly of HBsAb-Au-PVB. The binding of a specific HBsAb to HBsAg recognition layer could be detected by measurements of the impedance change. A new strategy was introduced for improving the sensitivity of impedance measurements via the large specific surface area and high surface free energy of Au nanoparticles and the encapsulated effect of polyvinyl butyral. The results showed that this strategy caused dramatic improvement of the detection sensitivity of HBsAg and had good linear response to detect HBsAg in the range of 20–160 ng·ml−1 with a detection limit of 7.8 ng·ml−1. Moreover, the studied immunosensor exhibited high sensitivity and long-term stability.
-
A novel immunosensor based on immobilization of hepatitis B surface antibody on Platinum Electrode modified colloidal gold and polyvinyl butyral as matrices via electrochemical impedance spectroscopy.
Bioelectrochemistry, 2004Co-Authors: Dianping Tang, Ruo Yuan, Yaqin Chai, Xia Zhong, Jianyuan Dai, Yan LiuAbstract:Hepatitis B surface antibody (HBsAb) was immobilized to the surface of Platinum Electrode modified with colloidal gold and polyvinyl butyral (PVB) as matrices to detect hepatitis B surface antigen (HBsAg) via electrochemical impedance spectroscopy (EIS). The electrochemical measurements of cyclic voltammetry and impedance spectroscopy showed that K4[Fe(CN)6]/K3[Fe(CN)6] reactions on the Platinum Electrode surface were blocked due to the procedures of self-assembly of HBsAb-Au-PVB. The binding of a specific HBsAb to HBsAg recognition layer could be detected by measurements of the impedance change. A new strategy was introduced for improving the sensitivity of impedance measurements via the large specific surface area and high surface free energy of Au nanoparticles and the encapsulated effect of polyvinyl butyral. The results showed that this strategy caused dramatic improvement of the detection sensitivity of HBsAg and had good linear response to detect HBsAg in the range of 20–160 ng·ml−1 with a detection limit of 7.8 ng·ml−1. Moreover, the studied immunosensor exhibited high sensitivity and long-term stability.
-
ultrasensitive potentiometric immunosensor based on sa and oca techniques for immobilization of hbsab with colloidal au and polyvinyl butyral as matrixes
Langmuir, 2004Co-Authors: Ruo Yuan, Dianping Tang, Yaqin Chai, Xia Zhong, Yan Liu, Jianyuan DaiAbstract:A novel potentiometric immunosensor for detection of hepatitis B surface antigen (HBsAg) has been developed by means of self-assembly (SA) and opposite-charged adsorption (OCA) techniques to immobilize hepatitis B surface antibody (HBsAb) on a Platinum Electrode. A cleaned Platinum Electrode was first pretreated in the presence of 10% HNO3 and 2.5% K2CrO4 solution and held at -1.5 V (vs SCE) for 1 min to make it negatively charged and then immersed in a mixing solution containing hepatitis B surface antibody, colloidal gold (Au), and polyvinyl butyral (PVB). Finally, HBsAb was successfully immobilized onto the surface of the negatively charged Platinum Electrode modified nanosized gold and PVB sol-gel matrixes. The modified procedure was characterized by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The immobilized hepatitis B surface antibody exhibited direct electrochemical behavior toward hepatitis B surface antigen (HBsAg). The performance and factors influencing the performance of the resulting immunosensor were studied in detail. More than 95.7% of the results of the human serum samples obtained by this method were in agreement with those obtained by enzyme-linked immunosorbent assays (ELISAs). The resulting immunosensor exhibited fast potentiometric response ( 6 months).