Characterization of field effect transistor with TiO<sub>2</sub>nanotube channel fabricated by dielectrophoresis

Ishii, Minoru; Terauchi, Masahiro; Yoshimura, Takeshi; Nakayama, Tadachika; Fujimura, Norifumi

doi:10.1088/1757-899x/18/8/082019

Cited by 3 publications

(2 citation statements)

References 27 publications

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“…Semiconducting nanoelectronic devices have attracted considerable attention in recent years due to their unique photoelectrochemical properties. , In particular, titanium dioxide (TiO 2 ) has proven to be the material of choice for various applications such as sensors, − transistors, solar cells, , water splitting, and antimicrobial agents by virtue of its electron band structure, high sensitivity, low cost, rapid response time, and recovery behavior; as well as providing photo/chemical stability and biocompatibility.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically Structured Suspended TiO₂ Nanofibers for Use in UV and pH Sensor Devices

Lee

Park

Cho

2014

ACS Appl. Mater. Interfaces

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Photoelectrochemical sensors based on hierarchically structured titanium dioxide (TiO2) nanofibers (NFs) were fabricated by combination of electrospinning, carbon microelectromechanical systems (MEMS), and hydrothermal reaction. During the electrospinning step, a rotating drum collector was used to align and position NFs of titanium tetraisopropoxide (TTIP) in polyvinylpyrrolidone (PVP) on top of a carbon-MEMS structure. Following calcination under vacuum, a stable ohmic contact was obtained between suspended TiO2-carbon NFs (TiO2/C NF) and the carbon electrodes. Subsequent to this, a hierarchical nanostructure of TiO2 nanowires (TiO2 NWs) was hydrothermally synthesized onto the TiO2/C NFs and successfully utilized as UV and pH sensors. This is the first demonstration of a semiconductor-based nanofiber sensor suspended on carbon electrodes that has been achieved by a relatively simple and cost-effective electrospinning method. Furthermore, these sensors demonstrate a high sensitivity, as well as a stable ohmic contact, due to the large surface area of the TiO2 NWs and the carbon–carbon contact between the suspended TiO2/C NFs and carbon electrodes.

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Section: Introductionmentioning

confidence: 99%

Hierarchically Structured Suspended TiO₂ Nanofibers for Use in UV and pH Sensor Devices

Lee

Park

Cho

2014

ACS Appl. Mater. Interfaces

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“…6) In our previous study, field-effect transistors (FETs) with a channel consisting of hydrothermal TNTs (TNT-FETs) were fabricated through dielectrophoresis, and the electric conduction of the hydrothermal TNTs was investigated. The results indicated that the electric conduction is dominated by a double Schottky barrier (DSB) [7][8][9][10] formed between the TNTs. Moreover, the conductivity decreases upon annealing at more than 100 C, which indicates that the adsorbed water on the TNT channel works as an electron donor for the TNTs.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Gas Sensing Characteristics of TiO₂ Nanotube Field-Effect Transistor

Ishii

Terauchi

Yoshimura

et al. 2012

Jpn. J. Appl. Phys.

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Hydrothermal TiO 2 nanotubes are focused on as a functional material owing to their large surface-to-bulk ratio. We have revealed that the electric conduction of a TiO 2 nanotube field-effect transistor (FET) is dominated by a double Schottky barrier formed between the TiO 2 nanotubes. In this study, the gas sensing characteristics of the FET for ethanol at room temperature were investigated. The decrease of the drain current was observed in atmosphere with an ethanol concentration of 30 ppm. From the detailed analysis of the barrier height and the threshold voltage using the model of a double Schottky barrier, it was found that the barrier decreases and the carrier densities decrease through the adsorption of ethanol, which works as an electron acceptor. #

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Investigation of Gas Sensing Characteristics of TiO₂Nanotube Field-Effect Transistor

Ishii

Terauchi

Yoshimura

et al. 2012

Jpn. J. Appl. Phys.

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Characterization of field effect transistor with TiO₂nanotube channel fabricated by dielectrophoresis

Cited by 3 publications

References 27 publications

Hierarchically Structured Suspended TiO₂ Nanofibers for Use in UV and pH Sensor Devices

Hierarchically Structured Suspended TiO₂ Nanofibers for Use in UV and pH Sensor Devices

Investigation of Gas Sensing Characteristics of TiO₂ Nanotube Field-Effect Transistor

Investigation of Gas Sensing Characteristics of TiO₂Nanotube Field-Effect Transistor

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Characterization of field effect transistor with TiO2nanotube channel fabricated by dielectrophoresis

Cited by 3 publications

References 27 publications

Hierarchically Structured Suspended TiO2 Nanofibers for Use in UV and pH Sensor Devices

Hierarchically Structured Suspended TiO2 Nanofibers for Use in UV and pH Sensor Devices

Investigation of Gas Sensing Characteristics of TiO2 Nanotube Field-Effect Transistor

Investigation of Gas Sensing Characteristics of TiO2Nanotube Field-Effect Transistor

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Characterization of field effect transistor with TiO₂nanotube channel fabricated by dielectrophoresis

Hierarchically Structured Suspended TiO₂ Nanofibers for Use in UV and pH Sensor Devices

Hierarchically Structured Suspended TiO₂ Nanofibers for Use in UV and pH Sensor Devices

Investigation of Gas Sensing Characteristics of TiO₂ Nanotube Field-Effect Transistor

Investigation of Gas Sensing Characteristics of TiO₂Nanotube Field-Effect Transistor