P‐1.12: Effects of Gate Voltage Pulse Width and Amplitude on Eliminating Persistent Photoconductivity in Amorphous InZnO TFTs

2021 ◽  
Vol 52 (S2) ◽  
pp. 703-706
Author(s):  
Changhui Fan ◽  
Yu Xin ◽  
Ludong Qin ◽  
Xiaoliang Zhou ◽  
Shengdong Zhang
Keyword(s):  
Gate Voltage ◽  
Voltage Pulse ◽  
Pulse Width ◽  
Persistent Photoconductivity

Substantial Reduction of Reset Current in CoO RRAM with Ta Bottom Electrode

2008 ◽  
Vol 1071 ◽  
Author(s):  
Hisashi Shima ◽  
Fumiyoshi Takano ◽  
Yukio Tamai ◽  
Hidenobu Muramatsu ◽  
Hiroyuki Akinaga ◽  
...  
Keyword(s):  
Voltage Pulse ◽  
Pulse Width ◽  
High Speed ◽  
Bottom Electrode ◽  
Substantial Reduction ◽  
Resistance Switching ◽  
Forming Process ◽  
Height Dependence ◽  
Load Resistor ◽  
Resistance Component

AbstractThe resistance switching in Pt/Co-O/Pt and Ta/Co-O/Pt has been investigated. Compared to Pt/Co-O/Pt, the reset current was more efficiently decreased in Ta/Co-O/Pt by using the load resistor in the forming process, indicating that the embedded resistance component with little parasitic capacitance effectively limits the current in the forming process. The reset process with the reset current lower than 0.15 mA was successfully demonstrated in Ta/Co-O/Pt. In addition, the high speed resistance switching by the voltage pulse with the pulse width of 20 ns was carried out, by investigating the pulse voltage height dependence of reset speed in Ta/Co-O/Pt.

scholarly journals Activation of platelet-rich plasma by pulse electric fields: Voltage, pulse width and calcium concentration can be used to control and tune the release of growth factors, serotonin and hemoglobin

PLoS ONE ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. e0249209
Author(s):  
Bogdan Neculaes ◽  
Andrew L. Frelinger ◽  
Anja J. Gerrits ◽  
Thomas Gremmel ◽  
Emma E. Forde ◽  
...  
Keyword(s):  
Growth Factors ◽  
Growth Factor ◽  
Electric Fields ◽  
Voltage Pulse ◽  
Pulse Width ◽  
Calcium Concentration ◽  
Platelet Rich Plasma ◽  
Clot Formation ◽  
Bovine Thrombin ◽  
Pulse Electric

Activated platelet-rich plasma (PRP) has been used in the clinical settings of wound healing and regenerative medicine, with activation typically induced by the addition of bovine thrombin. To eliminate issues with availability, cost and potential side effects associated with bovine thrombin, ex vivo PRP activation using pulse electric fields (PEF) has been proposed and demonstrated. The present study characterizes the effect of PEF voltage and pulse width, in combination with a range of calcium concentrations, on clot formation, growth factor release, and serotonin (5-HT) release from dense granules. The main findings are: 1) increasing calcium concentrations with most PEF conditions leads to increased levels of PDGF and 5-HT release; 2) whether EGF levels increase or decrease with increasing calcium concentration depends on the specific PEF parameters; 3) the pattern of PDGF and EGF levels in supernatants suggest that these molecules are localized differently within platelets; 4) significant levels of PDGF, EGF, and 5-HT can be released without inducing clot formation or hemoglobin release. In conclusion, voltage, pulse width and calcium concentration can be used to control and tune the release of growth factors, serotonin and hemoglobin from PEF-activated PRP. Because growth factor requirements vary for different types of wounds and for wounds at different stages of healing, the unique balance of factors in supernatants of PEF-activated PRP may provide more clinically advantageous than the current standard of bovine thrombin-activated PRP.

Deposition of Nano-Scale Ga Dots onto HF-Treated Si(111) Using a Scanning Tunneling Microscope

1992 ◽  
Vol 279 ◽  
Author(s):  
Katsuhiro Uesugi ◽  
Kiyoshi Sakata ◽  
Seiji Kawano ◽  
Masamichi Yoshimura ◽  
Takafumi Yao
Keyword(s):  
Electric Field ◽  
Scanning Tunneling Microscope ◽  
Voltage Pulse ◽  
Pulse Width ◽  
Pulse Height ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Nano Scale ◽  
Positive Voltage ◽  
Tentative Model

ABSTRACTNano-scale Ga dots are deposited through the decomposition of triethylgallium (TEGa) adsorbed on HF-treated Si(111) surfaces using a scanning tunneling microscope (STM). The deposition of Ga dots of 2–13 nm in diameter is achieved by applying a negative voltage pulse to the sample, while no deposition is observed when a positive voltage pulse is applied. The conditions for Ga deposition are systematically investigated by varying the gap conductance, pulse height, and pulse width. A tentative model for the mechanism of Ga deposition is proposed, in which TEGa molecules are decomposed by the electric field between the tip and the sample.

scholarly journals Design of a High Voltage Pulse Generator with Large Width Adjusting Range for Tumor Treatment

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1053
Author(s):  
Xin Rao ◽  
Xiaodong Chen ◽  
Jun Zhou ◽  
Bo Zhang ◽  
Yasir Alfadhl
Keyword(s):  
High Voltage ◽  
Voltage Pulse ◽  
Pulse Width ◽  
Pulse Generator ◽  
Biological Effects ◽  
High Voltage Pulse ◽  
Tumor Treatment ◽  
Capacitor Array ◽  
High Voltage Pulse Generator ◽  
Voltage Pulse Generator

The unique biological effects stimulated by short pulsed electric field have many applications in tumor treatment, such as irreversible electroporation, electrochemotherapy, gene transfection and immune therapy. These biological effects require high voltage pulses with different pulse width in the range from nanoseconds to hundreds of microseconds. To fulfill this requirement, a compact high voltage pulse generator has been designed based on a switchable capacitor array and a SiC MOSFET switching array. The proposed pulse generator has one output channel with an adjustable pulse width from 100 ns to 100 µs, an amplitude range from 0 kV to 2 kV, a repetition rate less than 1.2 kHz and a voltage drop less than 5%. The mechanism of the stacked switches circuit was investigated, in connection with a switchable capacitor array. The introduction of a switchable capacitor array extends the pulse width from nanosecond scale and microsecond scale compared with other similar design methods. The pulse generator has been designed in simulation and implemented in experiment. The developed pulse generator provides a convenient and economical tool for the further studies of the unique biological effects stimulated by different pulsed electric fields for tumor treatment.

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