pH sensor based on AuNPs/ ITO membrane as extended gate field-effect transistor

Alsaee, Saleh K.; Ahmed, Naser M.; Mzwd, Elham; Omar, Ahmad; Aljameel, A.I.; Afzal, Naveed; Razak, Ibrahim Abdul; Arshad, Suhana

doi:10.1007/s00340-021-07727-1

Cited by 9 publications

(5 citation statements)

References 26 publications

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“…1 a and b. This change in colour due to the oscillation of the conduction band electrons in the nanoparticles 44 is known as localized surface plasmon resonance (LSPR) which occurs when the frequency of the light photons matches the inherent frequency of the nanoparticles’ surface electrons 45 creating the reddish tones 46 . The colour intensity of the solution is relevant to the rise of the nanoparticles concentrations in the colloid 45 .…”

Section: Resultsmentioning

confidence: 99%

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Green synthesis of gold nanoparticles in Gum Arabic using pulsed laser ablation for CT imaging

Mzwd

Ahmed

Suradi

et al. 2022

Sci Rep

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Laser ablation synthesis in liquid solution (PLAL) is a green technique that allows for the physical formation of nanomaterials. This study indicates the preparation of stable gold nanoparticles (AuNPs) in Gum Arabic (GA) solution via laser ablation as a CT contrast agent. The optical properties were achieved using the absorption spectroscopic technique whereas the morphology and size distribution were investigated by TEM and ImageJ software. TEM image shows greater stability and spherical shape of GA-AuNPs with smaller size at 1.85 ± 0.99 nm compared to AuNPs without GA. The absorption spectrum of pure AuNPs has a lower absorption peak height in the visible range at λ = 521 nm, while the spectrum of GA-AuNPs has a higher plasmon peak height at λ = 514 nm with a blue shift towards lower wavelengths. The concentration of GA that dissolved in 10 mL of DI water via laser ablation is set at 20 mg. Increasing the number of pulses has only a minor effect on particle size distribution, which remains tiny in the nanometer range (less than 3 nm). For energies greater than 200 mJ, there is a blue shift toward shorter wavelengths. As the concentration of GA-AuNPs increases, the CT number is also increased indicating good image contrast. It can be concluded that there is a positive and significant influence of GA as a reducing agent for AuNPs, and a contrast agent for CT imaging which highlights its superiority in future medical applications.

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Section: Resultsmentioning

confidence: 99%

“…Nanoparticles are particles with a diameter of fewer than 100 nm 2 , 6 . Metal nanoparticles (NPs) are utilized in many applications like medicine 4 , 7 , biosensing 8 , 9 , biomedical sciences, cosmetics, food, and electronics, creating impressive gains in each field 4 .…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of gold nanoparticles in Gum Arabic using pulsed laser ablation for CT imaging

Mzwd

Ahmed

Suradi

et al. 2022

Sci Rep

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“…Field-effect transistor (FET) is a transducer to sensitively and promptly generate an electronic signal in a specific biochemical reaction, thus it is widely used for the develop of sensors. The extended-gate FET (EG-FET) is an effective form of FET to eliminate its application drawbacks, such as liquid erosion and weak expansibility. − Although they share the same sensing principle, EG-FET is more convenient and superior to FET regarding sensor configuration because only the EG electrode needs to be replaced after a detection, and it can be readily tailored with varied functional materials toward monitoring targets of interest. So far, there is no report about the development of multi-engineered graphene EG-FET as sensors, especially for ONOO – .…”

Section: Introductionmentioning

confidence: 99%

Multi-engineered Graphene Extended-Gate Field-Effect Transistor for Peroxynitrite Sensing in Alzheimer’s Disease

Peng,

Zeng,

Wang

et al. 2023

ACS Nano

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The expression of β-amyloid peptides (Aβ), a pathological indicator of Alzheimer’s disease (AD), was reported to be inapparent in the early stage of AD. While peroxynitrite (ONOO–) is produced excessively and emerges earlier than Aβ plaques in the progression of AD, it is thus significant to sensitively detect ONOO– for early diagnosis of AD and its pathological research. Herein, we unveiled an integrated sensor for monitoring ONOO–, which consisted of a commercially available field-effect transistor (FET) and a high-performance multi-engineered graphene extended-gate (EG) electrode. In the configuration of the presented EG electrode, laser-induced graphene (LIG) intercalated with MnO2 nanoparticles (MnO2/LIG) can improve the electrical properties of LIG and the sensitivity of the sensor, and graphene oxide (GO)-MnO2/Hemin nanozyme with ONOO– isomerase activity can selectively trigger the isomerization of ONOO– to NO3 –. With this synergistic effect, our EG-FET sensor can respond to the ONOO– with high sensitivity and selectivity. Moreover, taking advantage of our EG-FET sensor, we modularly assembled a portable sensing platform for wireless tracking ONOO– levels in the brain tissue of AD transgenic mice at earlier stages before massive Aβ plaques appeared, and we systematically explored the complex role of ONOO– in the occurrence and development of AD.

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“…While the conventional EG unit comprises a Si substrate, conductive electrode, and a sensing membrane, the EG unit proposed in this study simplifies the process, making it cost-effective because ITO nanofibers spun on low-cost glass substrates simultaneously serve as a conductive electrode and a sensing membrane [11,[30][31][32]. The differences between the EG-ISFET proposed in this study and conventional EG-ISFETs were compared in Table 1 [33][34][35][36][37][38]. The excellence of the electrospun ITO nanofiber-based EG-ISFET is verified through sensitivity and non-ideal effect evaluation.…”

Section: Introductionmentioning

confidence: 99%

“…The excellence of the electrospun ITO nanofiber-based EG-ISFET is verified through sensitivity and non-ideal effect evaluation. Moreover, the EG-ISFET performance improvement via two-step calcination and Ar plasma treatment of the electrospun ITO nanofiber [11,[36][37][38] membrane is quantitatively evaluated.…”

Section: Introductionmentioning

confidence: 99%

Transparent and High-Performance Extended Gate Ion-Sensitive Field-Effect Transistors Using Electrospun Indium Tin Oxide Nanofibers

Kim

Cho

2023

Chemosensors

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Herein, we propose a transparent high-performance extended-gate ion-sensitive field-effect transistor (EG-ISFET) using an electrospun indium-tin-oxide (ITO) nanofiber sensing membrane with a high specific surface area. Electrospinning is a simple and effective technique for forming nanofibers. Nevertheless, one-step calcination, such as conventional thermal annealing or microwave annealing, cannot sufficiently eliminate the inherent defects of nanofibers. In this study, we efficiently removed residual polymers and internal impurities from nanofibers via a two-step calcination process involving combustion and microwave annealing. Moreover, Ar plasma treatment was performed to improve the electrical characteristics of ITO nanofibers. Conformally coated thin-film sensing membranes were prepared as a comparative group and subjected to the same calcination conditions to verify the effect of the nanofiber sensing membrane. The characteristics of the ITO nanofiber and ITO thin-film sensing membranes were evaluated using scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), optical transmittance, and conductivity. Moreover, the sensor operation of the EG-ISFETs is evaluated in terms of sensitivity and non-ideal behaviors. The optimized process improves the sensor characteristics and sensing membrane quality. Therefore, the ITO nanofiber sensing membrane improves the sensitivity and stability of the EG-ISFET, suggesting its applicability as a high-performance biochemical sensor.

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pH sensor based on AuNPs/ ITO membrane as extended gate field-effect transistor

Cited by 9 publications

References 26 publications

Green synthesis of gold nanoparticles in Gum Arabic using pulsed laser ablation for CT imaging

Green synthesis of gold nanoparticles in Gum Arabic using pulsed laser ablation for CT imaging

Multi-engineered Graphene Extended-Gate Field-Effect Transistor for Peroxynitrite Sensing in Alzheimer’s Disease

Transparent and High-Performance Extended Gate Ion-Sensitive Field-Effect Transistors Using Electrospun Indium Tin Oxide Nanofibers

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