Fabrication and structural properties of flower-like TiO2 nanorod array films grown on glass substrate without FTO layer

Musa, M.Z.; Mamat, Mohamad Hafiz; Vasimalai, N.; Banu, I. B. Shameem; Malek, M. F.; Ahmad, Mohd Khairul; Suriani, A. B.; Mohamed, Azmi; Rusop, M.

doi:10.1016/j.matlet.2020.127902

Cited by 19 publications

(12 citation statements)

References 5 publications

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“…Therefore, at this stage, more H + ions will be generated and the increment in the current signal of the humidity sensor is caused by the protonic conduction. The reactions at the physisorbed layer can be expressed as follows 36 –38…”

Section: Resultsmentioning

confidence: 99%

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Parimon

Mamat

Banu

et al. 2021

Nanomaterials and Nanotechnology

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Manganese-doped nickel oxide nanosheet array films are successfully prepared on a nickel oxide seed-coated glass substrate by an immersion method. Various annealing temperatures between 300°C and 500°C are applied to the manganese-doped nickel oxide nanosheet array films to study their effect on the properties of nickel oxide, including humidity sensing performance. Field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), ultraviolet–visible (UV–vis) spectrophotometry, a two-probe current–voltage ( I- V) measurement system and a humidity measurement system are used to characterise the heat-treated manganese-doped nickel oxide samples. The effect of annealing temperature can be clearly observed for the different surface morphologies and diffraction patterns. The samples exhibit average crystallite size increases of 0.63–10.13 nm with increasing annealing temperature. The dislocation density, interplanar spacing, lattice parameter, unit cell volume and stress/strain are also determined from the XRD data. The average transmittances in the visible region for all samples show low percentages with the highest transparency of 50.7% recorded for manganese-doped nickel oxide annealed at 500°C. The optical band gap shows a decreasing trend with increasing annealing temperature. The I- V measurement results reveal that manganese-doped nickel oxide displays improved conductivity values with increasing annealing temperature. The sensitivity of the humidity sensors shows an ascending curve with increasing temperature. The optimal device performance is obtained with annealing at 500°C, with the highest sensitivity of 270 and the fastest response and recovery times. In contrast, the sample for annealing at 300°C shows poor sensing performance.

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Section: Resultsmentioning

confidence: 99%

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Parimon

Mamat

Banu

et al. 2021

Nanomaterials and Nanotechnology

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“…To determine the structural properties and to check the effect of the Ca-TiO 2 structure, XRD analysis was characterized by D8 Advance (Bruker Advanced, Berlin, Germany) [24] and a radiation wavelength of 1.5418 Å in the range of 2θ = 10 • to 80 • with a step size of 0.05 • /5 s. MDI Jade 6.5 software was used to investigate the crystallinity. Further crystallite size, microstrain, and dislocation density were calculated by using the Sherrer's equation and Williamson and Smallman's relation, as presented in the following Equations ( 1)-(3) [25][26][27][28].…”

Section: Materials Characterizationsmentioning

confidence: 99%

Performance Analysis of Calcium-Doped Titania (TiO2) as an Effective Electron Transport Layer (ETL) for Perovskite Solar Cells

et al. 2022

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Ca-doped TiO2 films were synthesized by the modified sol-gel method and employed as the electron transport material of perovskite solar cells (PSCs). Morphological, optoelectronic, thermal, and electrical studies of thin films were investigated through XRD, RAMAN, SEM, AFM, UV- Vis, FTIR, and IV characteristics. Ca doping was detected with the help of structural properties while morphological analysis revealed that thin films based on Ca-doped titania are crack-free, homogenous, and uniformly distributed. Further optoelectronic properties have shown a promising conversion efficiency of 9.79% for 2% Ca-doped titania followed by 1% Ca-doped titania, while 3% have shown the lowest conversion efficiency among these prepared samples. The 2% an optimized doping of Ca has shown an almost two-fold increase in conversion efficiency in comparison to pristine TiO2, along with an increase in current density from 15 mA cm−2 to 19.3 mA⋅cm−2. Improved energy efficiency and higher current density are attributed to faster electron transportation; moreover, the optimized percentage of Ca doping seems to be an effective approach to improve the PSCs’ performance.

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“…The fabricated sensor showed a humidity response of 196 from 40 to 90% RH levels. 15 Farzaneh et al fabricated a Cu-doped TiO 2 film sensor that exhibited an enhanced response (80) compared with that of the pristine TiO 2 (40) sensor between 30 and 70% RH levels. 16 Mallick et al prepared a humidity sensor by spinning polylactic acid−titanium dioxide (PLA− TiO 2 ) onto interdigitated ITO/glass substrates.…”

Section: Introductionmentioning

confidence: 99%

“…Musa et al grew flower-like TiO 2 on the glass substrate by the sputtering strategy. The fabricated sensor showed a humidity response of 196 from 40 to 90% RH levels . Farzaneh et al fabricated a Cu-doped TiO 2 film sensor that exhibited an enhanced response (80) compared with that of the pristine TiO 2 (40) sensor between 30 and 70% RH levels .…”

Section: Introductionmentioning

confidence: 99%

Humidity Sensing by Graphitic Carbon Nitride Nanosheet/TiO₂ Nanoparticle/Ti₃C₂T_x Nanosheet Composites for Monitoring Respiration and Evaluating the Waxing of Fruits

Guo

Kuang

Zhu

et al. 2021

ACS Appl. Nano Mater.

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Relative humidity (RH) is an important physical quantity in industry, agriculture, and medical treatment. However, it is still challenging to exploit high-performance humidity sensors that can meet the detection requirement for responding to both high humidity variation and low humidity variation. In this work, ternary graphitic carbon nitride (g-C 3 N 4 ) nanosheet/TiO 2 nanoparticle/Ti 3 C 2 T x nanosheet composites were synthesized by in situ oxidation and thermal polymerization. The response of the g-C 3 N 4 /TiO 2 /Ti 3 C 2 T x sensor reaches 531 from 11−95% RH, which enhances 4, 11, and 450 times compared with that of TiO 2 , g-C 3 N 4 , and TiO 2 /Ti 3 C 2 T x sensors. Moreover, the ternary g-C 3 N 4 /TiO 2 /Ti 3 C 2 T x sensor demonstrates excellent reproducibility, fast response speed, low hysteresis loop, and good anti-interference ability. The as-fabricated g-C 3 N 4 /TiO 2 /Ti 3 C 2 T x sensor is further utilized in practical applications for human respiration detection and evaluation of waxing of fruits. The test results show that our fabricated sensor is capable of precisely sensing breathing status and distinguishing the waxing of fruits. In addition, our sensor can be used in most application scenarios and accelerate the integration of the Internet of Things (IoT).

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Fabrication and structural properties of flower-like TiO2 nanorod array films grown on glass substrate without FTO layer

Cited by 19 publications

References 5 publications

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Performance Analysis of Calcium-Doped Titania (TiO2) as an Effective Electron Transport Layer (ETL) for Perovskite Solar Cells

Humidity Sensing by Graphitic Carbon Nitride Nanosheet/TiO₂ Nanoparticle/Ti₃C₂T_x Nanosheet Composites for Monitoring Respiration and Evaluating the Waxing of Fruits

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Fabrication and structural properties of flower-like TiO2 nanorod array films grown on glass substrate without FTO layer

Cited by 19 publications

References 5 publications

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Performance Analysis of Calcium-Doped Titania (TiO2) as an Effective Electron Transport Layer (ETL) for Perovskite Solar Cells

Humidity Sensing by Graphitic Carbon Nitride Nanosheet/TiO2 Nanoparticle/Ti3C2Tx Nanosheet Composites for Monitoring Respiration and Evaluating the Waxing of Fruits

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Humidity Sensing by Graphitic Carbon Nitride Nanosheet/TiO₂ Nanoparticle/Ti₃C₂T_x Nanosheet Composites for Monitoring Respiration and Evaluating the Waxing of Fruits