Radiation Detection: Resistivity Responses in Functional Poly(Olefin Sulfone)/Carbon Nanotube Composites

Lobez, Jose M.; Swager, Timothy M.

doi:10.1002/anie.200904936

Cited by 68 publications

(36 citation statements)

References 16 publications

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“…Previously, we synthesized various 1-D CP nanomaterials, such as polypyrrole NTs, PEDOT nanorods, and co-axial PEDOT nanofibers, which exhibited excellent transistor characterisitics for chemical and biological sensors 38,[40][41][42] . From our previous studies, we determined that it was necessary to attach the transistors to the electrode substrate to achieve sensor stability.…”

Section: Resultsmentioning

confidence: 99%

“…The movement of the transistors causes inter-contact resistances and loss of the transistors via each washing step, resulting in degradation of the sensing performance. Therefore, in this study, a copolymerization process was used to functionalize the PEDOT NTs with carboxylic groups (-COOH) to immobilize the transistor on an interdigitated microelectrode arrays (IMA) ( Figure S2 in supporting information) 38,[40][41][42] . Specifically, a soft template of the reverse-cylindrical micelle phase was formed by sodium bis(2-ethylhexyl) sulfosuccinate (AOT), allowing iron cation adsorption.…”

Section: Resultsmentioning

confidence: 99%

“…Owing to their unique chemical and physical properties, onedimensional (1-D) electrical nanomaterials 11,[38][39][40][41][42][43] such as wires 11,43,44 , rods 45 , belts, and tubes 29,38,39,[41][42][43] , play a key role as interconnectors and functional units in creating electronic, electrochemical, and optoelectronic devices on the nanometer scale. In particular, 1-D conducting polymer (CP) nanomaterials that have various advantages, such as facile functionalization 29,[46][47][48][49][50] , cost effectiveness 50 , and biocompatibility 46,51,52 , have been highlighted in various applications, including supercapacitors, solar cells, transistors, and sensors.…”

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confidence: 99%

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Human dopamine receptor nanovesicles for gate-potential modulators in high-performance field-effect transistor biosensors

Kwon¹

2016

Intrinsic Act

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The development of molecular detection that allows rapid responses with high sensitivity and selectivity remains challenging. Herein, we demonstrate the strategy of novel bio-nanotechnology to successfully fabricate high-performance dopamine (DA) biosensor using DA Receptor-containing uniform-particle-shaped Nanovesicles-immobilized Carboxylated poly(3,4-ethylenedioxythiophene) (CPEDOT) NTs (DRNCNs). DA molecules are commonly associated with serious diseases, such as Parkinson's and Alzheimer's diseases. For the first time, nanovesicles containing a human DA receptor D1 (hDRD1) were successfully constructed from HEK-293 cells, stably expressing hDRD1. The nanovesicles containing hDRD1 as gate-potential modulator on the conducting polymer (CP) nanomaterial transistors provided high-performance responses to DA molecule owing to their uniform, monodispersive morphologies and outstanding discrimination ability. Specifically, the DRNCNs were integrated into a liquid-ion gated field-effect transistor (FET) system via immobilization and attachment processes, leading to high sensitivity and excellent selectivity toward DA in liquid state. Unprecedentedly, the minimum detectable level (MDL) from the field-induced DA responses was as low as 10 pM in real-time, which is 10 times more sensitive than that of previously reported CP based-DA biosensors. Moreover, the FET-type DRNCN biosensor had a rapid response time (,1 s) and showed excellent selectivity in human serum.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

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Human dopamine receptor nanovesicles for gate-potential modulators in high-performance field-effect transistor biosensors

Kwon¹

2016

Intrinsic Act

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“…Organic semiconducting materials are being explored for various sensing applications as their material properties change upon interaction with various chemicals, gases, chemical vapors and high energy ionizing radiation [1][2][3][4][5][6][7]. These organic electronic sensors also offer various advantages, such as, low cost manufacturing and large area coverage with flexible substrates.…”

Section: Introductionmentioning

confidence: 99%

OFET Sensors with Poly 3-hexylthiophene and Pentacene as Channel Materials for Ionizing Radiation

Raval

Rao

2012

MRS Proc.

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Pentacene and poly 3-hexylthiophene (P3HT) are the most promising p-type organic semiconducting materials for fabrication of organic field effect transistors (OFETs). OFETs with aforesaid organic semiconducting materials have been demonstrated as total dose detectors for ionizing radiation, wherein the changes in the electrical characteristic parameters, such as, increase in the OFF current, increase in the ON current, change in the current ratio, shift in the threshold voltage, change in the subthreshold swing, etc., were used as a measure of ionizing radiation dose. Upon exposure to ionizing radiation P3HT based OFET sensor has shown an OFF current sensitivity of 4.4 nA/Gy while pentacene based OFET sensor has shown an OFF current sensitivity of 26.7 nA/Gy for a total of 50 Gy dose of ionizing radiation. Change in the conductivity of the thin-films of pentacene and P3HT were observed and compared using electrostatic force microscopy (EFM) imaging before and after exposure to ionizing radiation. Effects of ionizing radiation on the energy band structures of the organic semiconducting materials, pentacene and P3HT, have been studied using UV-visible spectroscopy. Moreover, analysis of UV-visible spectra of the thin-films suggested the generation of energy states in larger quantity in case of pentacene thin-film as compared to P3HT thin-film upon exposure to the same dose of ionizing radiation. These results confirm the higher sensitivity observed in pentacene OFET sensor as compared to P3HT OFET sensor in terms of the change in electrical parameters.

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“…O RGANIC semiconducting/conducting materials are being explored for various sensing applications, such as vapor sensing [1], [2], chemical sensing [3], biomedical applications [4], [5], and ionizing radiation detection [6]- [8], employing various detection techniques. Applications of organic semiconducting material device sensors for determining ionizing radiation and detection based on changes in various electrical parameters were also reported [7], wherein the change in conductivity of an organic material was measured as a function of ionizing radiation using an organic semiconductor-based resistor and an organic field-effect transistor (OFET).…”

Section: Introductionmentioning

confidence: 99%

Low-Operating-Voltage Operation and Improvement in Sensitivity With Passivated OFET Sensors for Determining Total Dose Radiation

Raval¹,

Rao²

2010

IEEE Electron Device Lett.

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Abstract-Using high-k material in a gate dielectric stack, low-operating-voltage organic semiconducting material sensors for determining total dose radiation are proposed. To improve the stability of organic semiconducting layer in the atmospheric conditions, a thin silicon nitride layer deposited by hot-wire CVD process was used as a passivation layer. Furthermore, in order to achieve higher sensitivity, a parallel connection of organic fieldeffect transistors (OFETs) is explored in this letter. These sensors are exposed to ionizing radiation using a cobalt-60 radiation source for different total dose values. A three-times improvement in sensitivity was observed in the OFF current with a three-OFET array.Index Terms-Array of organic field-effect transistor (OFET) sensors, improved sensitivity, ionizing radiation.

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Radiation Detection: Resistivity Responses in Functional Poly(Olefin Sulfone)/Carbon Nanotube Composites

Cited by 68 publications

References 16 publications

Human dopamine receptor nanovesicles for gate-potential modulators in high-performance field-effect transistor biosensors

Human dopamine receptor nanovesicles for gate-potential modulators in high-performance field-effect transistor biosensors

OFET Sensors with Poly 3-hexylthiophene and Pentacene as Channel Materials for Ionizing Radiation

Low-Operating-Voltage Operation and Improvement in Sensitivity With Passivated OFET Sensors for Determining Total Dose Radiation

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