Fabrication of TiO2 sensor using rapid breakdown anodization method to measure pressure, humidity and sense gases at room temperature

Khaleel, Reem Saadi; Hashim, Mustafa Shakir

doi:10.24996/ijs.2019.60.8.6

Cited by 10 publications

(6 citation statements)

References 16 publications

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“…Produced TNPs had an amorphous structure. This result is in agreement with that obtained by (Reem et al, 2019). After heat treatment, LNTs had a polycrystalline structure with a dominant peak (110).…”

Section: Resultssupporting

confidence: 92%

Investigation of biomimetic hydroxyapatite formation on titania nanoparticles and lobed nanotubes

Abbas

Hashim

2022

KJS publishes peer-review articles in Mathematics, Computer Sci

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An anodizing method was used to produce TiO2 nanotubes (TNTs) on Ti metal bases. These tubes were transformed into lobed nanotubes (LNTs) by heating at 6000C as scanning electron microscopy (SEM) images showed. A rapid break down anodizing (RBA) technique was utilized to produce TiO2 nanoparticles (TNPs). These particles were deposited on LNTs by the electrophoretic deposition (EPD) method. An X-ray diffraction (XRD) test revealed the polycrystalline composition of the formed LNTs and the amorphous structure of TNPs. The bioactivity of LNTs and the deposited TNPs on the LNTs were tested by immersing them in simulated body fluid (SBF) for one month. For the two samples, XRD patterns showed the appearance of small peaks of hydroxyapatite (HAp), which indicates the bioactivity of these samples. SEM images show that the HAp layer on LNTs was in the form of protrusions, while on TNPs it was in the form of crossed filaments.

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Section: Resultssupporting

confidence: 92%

Investigation of biomimetic hydroxyapatite formation on titania nanoparticles and lobed nanotubes

Abbas

Hashim

2022

KJS publishes peer-review articles in Mathematics, Computer Sci

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“…Vapor sensors are typically based on classic oxide materials such as ZnO developed by Nanto et al, SnO 2 developed by Liu et al, and WO 3 developed by Wang et al Other advanced but challenging FET-based devices in production were developed by Lundström et al along with capacitors developed by Winquist et al In ref , authors review most recent results in the field of nano-heterostructured materials for gas sensing including metal oxides and two-dimensional (2D) structures, demonstrating several limitations including operation at high temperatures and selectivity issues. Moreover, most of these together with other interesting approaches − are found to be incompatible with the modern silicon technology.…”

Section: Introductionmentioning

confidence: 99%

Silicon Nanowire-Based Room-Temperature Multi-environment Ammonia Detection

Kondrat'ev¹,

Морозов²,

Vyacheslavova

et al. 2022

ACS Appl. Nano Mater.

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Nanowires represent numerous opportunities for nanoelectronics and sensorics, while metal contact fabrication makes the device development rather challenging. Here, we demonstrate that silicon (Si) nanowires deposited on interdigital metal contacts via simple drop casting exhibit an abrupt increase in conductivity upon exposure to ammonia vapors and aqueous solutions due to adsorption of the analyte species. To reduce the noise of the DC resistance measurements lacking ohmic conductivity, we exploit electronic impedance spectroscopy. The resistive response is found to be dependent on the ammonia content in vapor and liquid matter. The results demonstrate a detection limit of 4 μmol•L −1 (80 ppb), a sensitivity of 0.2% μmol −1 •l (0.01%•ppb −1 ), and applicability for the low-concentration detection of up to 400 μmol•L −1 (8 ppm) ammonia in aqueous solutions both directly and indirectly with a response rate of up to 0.43%•s −1 and a recovery rate of 0.31%•s −1 and show selectivity to oxidizing species. Thus, we demonstrate that the use of semiconductor nanowires in adsorption sensorics does not require the fabrication of ohmic contacts and present a simple fabrication protocol perspective for the development of highly sensitive room-temperature multi-environment sensors.

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“…Semiconductors are perfect materials for gas sensors; accordingly, their conductivity is based on the concentration of the gas in contact. Currently, semiconductors of metal oxides such as zinc oxide (ZnO), stannic oxide (SnO2), indium oxide (In2O3), and titanium dioxide (TiO2) have been utilized to reveal harmful gases [7][8][9][10][11][12]. TiO2 is highly applied as a material for gas sensing in order to detect harmful and toxic gases due to its excellent physicochemical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Voltage on Gas Sensor Performance of Anodization Synthesized TiO2 Nanotubes Arrays

Faris,

Ayal

2023

Iraqi Journal of Science

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Serious gases have been highly related to being prejudiced against human life within the environment. The evolution of a trustworthy gas sensor with an elevated response is of major importance for detecting various hazardous gases. Titanium dioxide (TiO2) nanotubes (TNTs) are favorable candidates with considerable potential and stellar performance in gas sensor applications. In this work, we have studied the effect of voltage on preparing TiO2 nanotubular arrays via the anodization technique for gas sensor applications. A simple electrochemical anodization approach was used to synthesize titanium dioxide nanotubes. Diverse techniques of characterization were used to evaluate TNTs. The results gained from field emission scanning electron microscopy (FESEM), energy dispersion spectroscopy (EDS), and X-ray diffraction (XRD) indicate that TiO2 was formed. Gas sensors were created, and the gas detection characteristics were directed towards hydrogen sulfide (H2S), which is not a healthy gas. The sensor made from these nanotubes responds well to this gas at different temperatures and has high sensitivity. The H2S-detecting characteristics were evaluated at values ranging from room temperature up to 300 oC. Results show that the gas sensor TNTs that was prepared at 30 volt for H2S gas sensing has the highest sensitivity and shortest response time at room temperature.

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Fabrication of TiO2 sensor using rapid breakdown anodization method to measure pressure, humidity and sense gases at room temperature

Cited by 10 publications

References 16 publications

Investigation of biomimetic hydroxyapatite formation on titania nanoparticles and lobed nanotubes

Investigation of biomimetic hydroxyapatite formation on titania nanoparticles and lobed nanotubes

Silicon Nanowire-Based Room-Temperature Multi-environment Ammonia Detection

Effect of Voltage on Gas Sensor Performance of Anodization Synthesized TiO2 Nanotubes Arrays

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