scholarly journals Highly sensitive urine glucose detection by graphene field-effect transistors functionalized with electropolymerized nanofilms.

2022 ◽  
Author(s):  
Gonzalo Eduardo Fenoy ◽  
Waldemar Alejandro Marmisollé ◽  
Wolfgang Knoll ◽  
Omar Azzaroni
Keyword(s):  
Glucose Oxidase ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Glucose Sensors ◽  
Glucose Detection ◽  
New Approach ◽  
Urine Glucose ◽  
Highly Sensitive

We introduce a new approach for glucose oxidase (GOx) immobilization on graphene field-effect transistors (gFETs) to fabricate highly sensitive glucose sensors. The strategy relies on the electropolymerization of a layer...

scholarly journals Aptamer–field-effect transistors overcome Debye length limitations for small-molecule sensing

Science ◽  
2018 ◽  
Vol 362 (6412) ◽  
pp. 319-324 ◽  
Author(s):  
Nako Nakatsuka ◽  
Kyung-Ae Yang ◽  
John M. Abendroth ◽  
Kevin M. Cheung ◽  
Xiaobin Xu ◽  
...  
Keyword(s):  
Conformational Changes ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Debye Length ◽  
Stem Loop ◽  
Highly Sensitive ◽  
Close Proximity ◽  
Sphingosine 1 Phosphate ◽  
Specific Receptors ◽  
Highly Sensitive Detection

Detection of analytes by means of field-effect transistors bearing ligand-specific receptors is fundamentally limited by the shielding created by the electrical double layer (the “Debye length” limitation). We detected small molecules under physiological high–ionic strength conditions by modifying printed ultrathin metal-oxide field-effect transistor arrays with deoxyribonucleotide aptamers selected to bind their targets adaptively. Target-induced conformational changes of negatively charged aptamer phosphodiester backbones in close proximity to semiconductor channels gated conductance in physiological buffers, resulting in highly sensitive detection. Sensing of charged and electroneutral targets (serotonin, dopamine, glucose, and sphingosine-1-phosphate) was enabled by specifically isolated aptameric stem-loop receptors.

scholarly journals Graphene field effect transistors for highly sensitive and selective detection of K+ ions

2017 ◽  
Vol 253 ◽  
pp. 759-765 ◽  
Author(s):  
Hongmei Li ◽  
Yihao Zhu ◽  
Md. Sayful Islam ◽  
Md Anisur Rahman ◽  
Kenneth B. Walsh ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Selective Detection ◽  
Highly Sensitive

Iron-coordinating π-conjugated semiconducting polymer: morphology and charge transport in organic field-effect transistors

2020 ◽  
Vol 8 (24) ◽  
pp. 8213-8223 ◽  
Author(s):  
P. Blake J. St. Onge ◽  
Tzu-Chien Chen ◽  
Adam Langlois ◽  
Aneeta Younus ◽  
I Jo Hai ◽  
...  
Keyword(s):  
Solid State ◽  
Charge Transport ◽  
Field Effect ◽  
Field Effect Transistors ◽  
Metal Coordination ◽  
Organic Field Effect Transistors ◽  
Semiconducting Polymer ◽  
New Approach ◽  
Polymer Morphology

A new approach to improve charge transport and solid-state morphology in a semiconducting polymer was developed through metal coordination without disruption of the π-conjugation.

Probing the Performance of Glucose Oxidase Treated Graphene-Based Field Effect Transistors

2019 ◽  
Vol 19 (11) ◽  
pp. 7442-7446 ◽  
Author(s):  
Salma Siddique ◽  
Hamid Mukhtar
Keyword(s):  
Glucose Oxidase ◽  
Electrical Transport ◽  
Field Effect ◽  
Treatment Time ◽  
Field Effect Transistors ◽  
Electrical Performance ◽  
Effect Transistor ◽  
Graphene Devices ◽  
Graphene Fet ◽  
Effect Of Glucose

Graphene due to its unique properties of biocompatibility has received considerable attention for biosensing applications. Here, we report the effect of glucose oxidase treatment on the graphene devices. Raman spectroscopy and the electrical transport measurements are performed to study the graphene intrinsic characteristics before glucose oxidase treatment. The absence of the defect peak in the Raman spectrum shows high-quality graphene. The modulation in the electrical properties is further investigated by different period of glucose oxidase treatment. Our results illustrate that the mobility of the graphene-based field effect transistor is gradually enhanced with the glucose oxidase treatment time. The enhancement in the electrical performance of graphene FET with the biomolecules could be the suitable route for the bioelectronic devices.

scholarly journals Gas adsorption and light interaction mechanism in phosphorene-based field-effect transistors

2020 ◽  
Vol 22 (10) ◽  
pp. 5949-5958 ◽  
Author(s):  
Manthila Rajapakse ◽  
George Anderson ◽  
Congyan Zhang ◽  
Rajib Musa ◽  
Jackson Walter ◽  
...  
Keyword(s):  
Schottky Barrier ◽  
Field Effect ◽  
Gas Adsorption ◽  
Field Effect Transistors ◽  
Interaction Mechanism ◽  
Metal Contact ◽  
Contact Interface ◽  
Sensing Mechanism ◽  
Highly Sensitive ◽  
Barrier Model

Phosphorene-based field effect transistors are fabricated and are shown to be highly sensitive gas and photodetectors. The sensing mechanism is explained using a Schottky barrier model at the phosphorene/metal contact interface.

Immobilization of glucose oxidase on ZnO nanorods decorated electrolyte-gated field effect transistor for glucose detection

2017 ◽  
Vol 22 (1) ◽  
pp. 61-67 ◽  
Author(s):  
M. Fathollahzadeh ◽  
M. Hosseini ◽  
M. Norouzi ◽  
A. Ebrahimi ◽  
M. Fathipour ◽  
...  
Keyword(s):  
Glucose Oxidase ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Zno Nanorods ◽  
Glucose Detection ◽  
Effect Transistor

scholarly journals Highly Sensitive NH3 Detection Based on Organic Field-Effect Transistors with Tris(pentafluorophenyl)borane as Receptor

2012 ◽  
Vol 134 (36) ◽  
pp. 14650-14653 ◽  
Author(s):  
Weiguo Huang ◽  
Kalpana Besar ◽  
Rachel LeCover ◽  
Ana María Rule ◽  
Patrick N. Breysse ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
Highly Sensitive
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