Leaf-like carbon nanotube/nickel composite membrane extended-gate field-effect transistors as <i>p</i>H sensor

Huang, Bohr–Ran; Lin, Tzu-Chao

doi:10.1063/1.3610554

Cited by 22 publications

(15 citation statements)

References 21 publications

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“…Therefore, the majority of works using EGFET as part of a sensor describes it as a pH-sensor 3,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] . PH monitoring and control, for itself, are quite important.…”

mentioning

confidence: 99%

Mechanisms of Ion Detection for FET-Sensors Using FTO: Role of Cleaning Process, pH Sequence and Electrical Resistivity

Nascimento

Mulato

2017

Mat. Res.

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The use of FTO samples as an extended gate field effect transistor biosensor is presented. The FTO samples were produced by spray pyrolysis technique. The cleaning process is shown to have a fundamental importance for the final sensitivity of the samples when multiple re-usage is adopted. The role of electrical resistivity and morphology of the films are investigated. The influence of pH sequence of measurements from 2 to 12 is presented. Both increasing and decreasing the pH values sequence of measurements are compared. Electrical, morphological, time evolution and electrochemical experiments are correlated in the main discussion. A physical-chemical model is presented to explain the main mechanisms of charge adsorption and desorption. Parameters not commonly reported in the literature are proven to have fundamental importance in sensors behavior and characterization.

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confidence: 99%

Mechanisms of Ion Detection for FET-Sensors Using FTO: Role of Cleaning Process, pH Sequence and Electrical Resistivity

Nascimento

Mulato

2017

Mat. Res.

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“…From this point of view, both the EGFET and voltammetric sensors exhibit the same electrochemical mechanism involving charged interfaces and binding sites of H + and OH -. These sites can be protonated or deprotonated, leading to a surface charge which is dependent on the pH of the electrolyte, and controls the surface potential 9,22 . In the voltammetry is possible to sweep a pontential to the regions which the electroactive species exist as oxidized (Ox) as well as, followed to reduced species (Red) and when the ratio [Ox]/[Red] approaches to zero it is called isoelectric point or zero (IEP).…”

Section: Resultsmentioning

confidence: 99%

Comparative Sensibility Study of WO3 ph Sensor Using EGFET and Ciclic Voltammetry

et al. 2015

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“…Until now, CNTFs have been mixed with polymer or metal to improve the pH sensing characteristics of the pristine CNTFs. For instance, a carbon felt/carbon nanotube/polyaniline composite as the pH sensing membrane of EGFET [20] and a leaf-like carbon nanotube/nickel composite for the pH-EGFET applications [21] have been reported. Although these proposed composites demonstrated the good pH sensing characteristics, these works did not utilize the CNTFs onto the flexible substrates for the disposal sensor applications in addition to the possibly encountered complex processes and contamination issues.…”

Section: Introductionmentioning

confidence: 99%

Functionalized Carbon Nanotube Thin Films as the pH Sensing Membranes of Extended-Gate Field-Effect Transistors on the Flexible Substrates

Tsai

Huang

Wang

et al. 2014

IEEE Trans. Nanotechnology

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The oxygen-plasma-functionalized carbon nanotube thin films on the flexible substrates as the pH sensing membranes of extended-gate field-effect transistors are proposed for the first time. The carbon nanotubes are ultrasonically sprayed onto the polyimide substrates followed by an oxygen-plasma functionalization. Such oxygen-plasma-treated carbon nanotube thin films (CNTFs) exhibit superior pH sensing characteristics with the sensitivity of 55.7 mV/pH and voltage linearity of 0.9996 in a wide sensing range of pH 1-13. Moreover, the excellent flexibility of carbon nanotube is also demonstrated and the oxygen-plasma-treated CNTFs still maintain the sensitivity of 53.6 mV/pH and voltage linearity of 0.9943 even after five-cycle bending test. These results reveal that the oxygen-plasma-treated CNTFs have great potentials in the practically disposal and wearable biosensor applications.Index Terms-Biosensors, carbon nanotube (CNT), extendedgate field-effect transistors (EGFETs), flexible substrates.

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Leaf-like carbon nanotube/nickel composite membrane extended-gate field-effect transistors as pH sensor

Cited by 22 publications

References 21 publications

Mechanisms of Ion Detection for FET-Sensors Using FTO: Role of Cleaning Process, pH Sequence and Electrical Resistivity

Mechanisms of Ion Detection for FET-Sensors Using FTO: Role of Cleaning Process, pH Sequence and Electrical Resistivity

Comparative Sensibility Study of WO3 ph Sensor Using EGFET and Ciclic Voltammetry

Functionalized Carbon Nanotube Thin Films as the pH Sensing Membranes of Extended-Gate Field-Effect Transistors on the Flexible Substrates

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