The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Dieter Neher - One of the best experts on this subject based on the ideXlab platform.

  • Simultaneous Extraction of charge density dependent mobility and variable contact resistance from thin film transistors
    Applied Physics Letters, 2014
    Co-Authors: Riccardo Di Pietro, Deepak Venkateshvaran, Andreas Klug, Emil J W Listkratochvil, Antonio Facchetti, Henning Sirringhaus, Dieter Neher
    Abstract:

    A model for the Extraction of the charge density dependent mobility and variable contact resistance in thin film transistors is proposed by performing a full derivation of the current-voltage characteristics both in the linear and saturation regime of operation. The calculated values are validated against the ones obtained from direct experimental methods. This approach allows unambiguous determination of gate voltage dependent contact and channel resistance from the analysis of a single device. It solves the inconsistencies in the commonly accepted mobility Extraction methods and provides additional possibilities for the analysis of the injection and transport processes in semiconducting materials.

  • Simultaneous Extraction of charge density dependent mobility and variable contact resistance from thin film transistors
    arXiv: Mesoscale and Nanoscale Physics, 2014
    Co-Authors: Riccardo Di Pietro, Deepak Venkateshvaran, Andreas Klug, Emil J W Listkratochvil, Antonio Facchetti, Henning Sirringhaus, Dieter Neher
    Abstract:

    A model for the Extraction of the charge density dependent mobility and variable contact resistance in thin film transistors is proposed by performing a full derivation of the current-voltage characteristics both in the linear and saturation regime of operation. The calculated values are validated against the ones obtained from direct experimental methods. This approach allows unambiguous determination of both contact and channel resistance from the analysis of the current voltage characteristics of a single device, with no a-priori assumption on the two parameters. It solves the inconsistencies in the commonly accepted mobility Extraction methods and provides new possibilities for the analysis of the injection and transport processes in semiconducting materials.

Bin Liang - One of the best experts on this subject based on the ideXlab platform.

  • Simultaneous Extraction of vanadium and titanium from vanadium slag using ammonium sulfate roasting leaching process
    Journal of Alloys and Compounds, 2018
    Co-Authors: Guoquan Zhang, Dongmei Luo, Chenhui Deng, Bin Liang
    Abstract:

    Abstract Sodium and calcification roasting processes are traditional technologies to recover vanadium from vanadium slag. However, these processes are associated with many drawbacks, including high energy consumption, serious environment pollution, and the inability to Simultaneously extract associated titanium resources. In this paper, a novel technology for Simultaneous Extraction of vanadium and titanium from vanadium slag was proposed, in which the vanadium slag was roasted with recyclable (NH4)2SO4 (AS) at moderately high temperatures followed by dilute H2SO4 leaching. To enhance the Extraction, an activation pretreatment of the vanadium slag through high-temperature water quenching was employed. The results demonstrated that the activation significantly accelerated the Extraction, with the vanadium and titanium Extraction increasing by 16% and 12%, respectively, compared with the raw vanadium slag. The Extraction of vanadium and titanium were 91% and 77%, respectively, after roasting at an AS-to-vanadium slag mass ratio of 4:1 and 370 °C followed by leaching in a 6% H2SO4 solution. X-ray diffraction analysis indicated that the spinel phases in the vanadium slag, such as FeV2O4, Fe2TiO3, and Fe2MnO4, began to transform into (NH4)3V(SO4)3, (NH4)3Fe(SO4)3, (NH4)2Mn(SO4)2, and TiSO4 at 320 °C and a nearly complete conversion could be achieved at 370 °C. The mass ratio of AS to vanadium slag significantly affected the Extraction of both vanadium and titanium, which increased with the increasing mass ratio until an 8:1 ratio was achieved, after which, the Extraction decreased. A stratification phenomenon of the vanadium slag and ammonium bisulfate at high AS/slag mass ratios was observed, which could be responsible for the decreasing Extraction.

Riccardo Di Pietro - One of the best experts on this subject based on the ideXlab platform.

  • Simultaneous Extraction of charge density dependent mobility and variable contact resistance from thin film transistors
    Applied Physics Letters, 2014
    Co-Authors: Riccardo Di Pietro, Deepak Venkateshvaran, Andreas Klug, Emil J W Listkratochvil, Antonio Facchetti, Henning Sirringhaus, Dieter Neher
    Abstract:

    A model for the Extraction of the charge density dependent mobility and variable contact resistance in thin film transistors is proposed by performing a full derivation of the current-voltage characteristics both in the linear and saturation regime of operation. The calculated values are validated against the ones obtained from direct experimental methods. This approach allows unambiguous determination of gate voltage dependent contact and channel resistance from the analysis of a single device. It solves the inconsistencies in the commonly accepted mobility Extraction methods and provides additional possibilities for the analysis of the injection and transport processes in semiconducting materials.

  • Simultaneous Extraction of charge density dependent mobility and variable contact resistance from thin film transistors
    arXiv: Mesoscale and Nanoscale Physics, 2014
    Co-Authors: Riccardo Di Pietro, Deepak Venkateshvaran, Andreas Klug, Emil J W Listkratochvil, Antonio Facchetti, Henning Sirringhaus, Dieter Neher
    Abstract:

    A model for the Extraction of the charge density dependent mobility and variable contact resistance in thin film transistors is proposed by performing a full derivation of the current-voltage characteristics both in the linear and saturation regime of operation. The calculated values are validated against the ones obtained from direct experimental methods. This approach allows unambiguous determination of both contact and channel resistance from the analysis of the current voltage characteristics of a single device, with no a-priori assumption on the two parameters. It solves the inconsistencies in the commonly accepted mobility Extraction methods and provides new possibilities for the analysis of the injection and transport processes in semiconducting materials.

Kenneth H Carlson - One of the best experts on this subject based on the ideXlab platform.

  • Simultaneous Extraction and analysis of 11 tetracycline and sulfonamide antibiotics in influent and effluent domestic wastewater by solid phase Extraction and liquid chromatography electrospray ionization tandem mass spectrometry
    Journal of Chromatography A, 2005
    Co-Authors: Shinwoo Yang, Jongmun Cha, Kenneth H Carlson
    Abstract:

    Abstract Wastewater treatment plants (WWTPs) in which antibiotic compounds are not totally eliminated are considered to be point sources of antibiotic contamination in surface and ground waters. Therefore, there is a need for sensitive and reliable analytical methods for measuring these compounds in WWTP water matrices. This paper describes a Simultaneous method for the determination of six tetracyclines (TCs) (oxytetracycline (OTC), tetracycline (TC), demeclocycline (DMC), chlortetracycline (CTC), doxycycline (DXC), meclocycline (MCC)) and five sulfonamides (SAs) (sulfathiazole (STZ), sulfamethazine (SMT), sulfachloropyridazine (SCP), sulfamethoxazole (SMX) and sulfadimethoxine (SDM)) using solid-phase Extraction followed by liquid chromatography-ion trap tandem mass spectrometry. The average recovery of 11 antibiotics for Simultaneous Extraction was 83.3 ± 12.6 and 89.8 ± 11.5% for six TCs, and 95.2 ± 11.4 and 97.7 ± 10.6% for five SAs in the influent and effluent water, respectively. Matrix effects were found to be significant when measuring TCs but not SAs. The accuracy and day-to-day variation of the method fell within an acceptable range of 15% absolute. Method detection limits in wastewater matrices were between 0.03 and 0.07 μg/L. For the investigated 11 antibiotic compounds TC, DMC, CTC, DXC, SMT, SMX and SDM were found in the influents with a concentration range of 0.05–1.09 μg/L. CTC, DXC and SMX were also detected in the effluents with a concentration range of 0.06–0.21 μg/L. These results were compared with those in WWTP effluents of Canada, Germany and Switzerland.

Guoquan Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Simultaneous Extraction of vanadium and titanium from vanadium slag using ammonium sulfate roasting leaching process
    Journal of Alloys and Compounds, 2018
    Co-Authors: Guoquan Zhang, Dongmei Luo, Chenhui Deng, Bin Liang
    Abstract:

    Abstract Sodium and calcification roasting processes are traditional technologies to recover vanadium from vanadium slag. However, these processes are associated with many drawbacks, including high energy consumption, serious environment pollution, and the inability to Simultaneously extract associated titanium resources. In this paper, a novel technology for Simultaneous Extraction of vanadium and titanium from vanadium slag was proposed, in which the vanadium slag was roasted with recyclable (NH4)2SO4 (AS) at moderately high temperatures followed by dilute H2SO4 leaching. To enhance the Extraction, an activation pretreatment of the vanadium slag through high-temperature water quenching was employed. The results demonstrated that the activation significantly accelerated the Extraction, with the vanadium and titanium Extraction increasing by 16% and 12%, respectively, compared with the raw vanadium slag. The Extraction of vanadium and titanium were 91% and 77%, respectively, after roasting at an AS-to-vanadium slag mass ratio of 4:1 and 370 °C followed by leaching in a 6% H2SO4 solution. X-ray diffraction analysis indicated that the spinel phases in the vanadium slag, such as FeV2O4, Fe2TiO3, and Fe2MnO4, began to transform into (NH4)3V(SO4)3, (NH4)3Fe(SO4)3, (NH4)2Mn(SO4)2, and TiSO4 at 320 °C and a nearly complete conversion could be achieved at 370 °C. The mass ratio of AS to vanadium slag significantly affected the Extraction of both vanadium and titanium, which increased with the increasing mass ratio until an 8:1 ratio was achieved, after which, the Extraction decreased. A stratification phenomenon of the vanadium slag and ammonium bisulfate at high AS/slag mass ratios was observed, which could be responsible for the decreasing Extraction.