Nanocomposite thick films of CsPbI3: PVDF-HFP on plastics for direct conversion low-dose X-ray sensor

Karthieka, R.R.; Venkatasubbu, G. Devanand; Prakash, T.

doi:10.1016/j.mssp.2020.105289

Cited by 15 publications

(4 citation statements)

References 31 publications

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“… Material Sensitivity (µC Gy −1 cm −3 ) X-ray tube voltage (kV) Dose rate (mGy s −1 ) Voltage/electric field Ref. CsPbI 3 : PVDF-HFP 4.7 70 2.5 2 V [ 24 ] BiI 3 0.053 70 2.5 2 V [ 25 ] Bi 5 O 7 I 1.926 70 2.5 2 V [ 26 ] TMCM-CdCl 3 128.9 ± 4.64 µC Gy −1 cm −2 40 1.06 µGy −1 s −1 10 V [ 27 ] ω-Bi 2 O 3 3.077 μCGy −1 cm −2 60 56.95 μGy −1 s −1 20 V [ 28 ] CsPbI 3 83.6 μC Gy −1 cm −2 60 1.7 0.17 V μm −1 [ 29 ] Y 2 O 3 (high temp.) 0.143 70 2.5 2 V [ …”

Section: Resultsmentioning

confidence: 99%

Polymer-BiI3 composites for high-performance, room-temperature, direct X-ray detectors

2022

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Low-energy X-rays have a predominant role in medical diagnostic applications, grown tremendously during recent Covid-19 pandemic times. Synthesis of stable, PMMA/polystyrene-BiI 3 composites has been done through a facile, low-cost, dry-tumble mixing technique for direct X-ray detector applications. Comparative analysis of structural, optical, and photocurrent responses upon irradiation with low-energy X-rays (30 and 60 kV) ensue that PS-BiI 3 demonstrates high SNR 3300, sensitivity 189 µC Gy −1 cm −3 and fast response time 30 ms, at dose rate 1.68 mGy s −1 , affirming the composite to be prospective candidate for low-energy, room-temperature, direct X-ray detectors under low bias conditions. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1557/s43579-022-00185-6.

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Section: Resultsmentioning

confidence: 99%

Polymer-BiI3 composites for high-performance, room-temperature, direct X-ray detectors

2022

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“…The obtained samples were initially polished with a sandpaper grit size of 320, 600, 1000, and 2000 and then chemically etched using 1:4:5 hydrofluoric acid, nitric acid and DI water. 35,36 The etching time for all the samples was the 30 s. The anodization process was then carried out in two-stages. The voltage was manually tuned from 0 V to 30 V and was maintained for 30 min.…”

Section: Methodsmentioning

confidence: 99%

“…The contact angle can see that anodized samples 1,2,3 and 4 with nanotube length of 1,1.5, 2.5 and 1.6 mm respectively showed the contact angle degrees as 128 � , 118 � , 49, and 92.806 � (Figure 5 morphologies would improve the osteoblast behavior and enhance the osseointegration. 36…”

Section: Wetting Behaviormentioning

confidence: 99%

Anodic synthesis of TiO₂ nanotubes by step-up voltages

Sivaprakash

Narayanan

2021

Journal of Composite Materials

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Fabrication of TiO2 nanotubes (NTs) has extensive application properties due to their high corrosion resistant and compatibility with biomedical applications, the synthesis of TiO2 nanotubes over titanium has drawn interest in various fields. The synthesis of TiO2 NTs using novel in-situ step-up voltage conditions in the electrochemical anodization process is recorded in this work. For manufacturing the NTs at 1 hour of anodization, the input potential of 30, 40 and 50 V was selected. With increasing step-up voltage during the anodization process, an improvement in the NTs was observed, favoring corrosion resistance properties. The surface of NTs enhances the structure of the ribs, raising the potential for feedback over time. XRD was used to analyze phase changes, and HR-SEM analyzed surface topography. Impedance tests found that longer NTs improved the corrosion resistance.

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“…Recently, our research group has explored the possibility of utilizing semiconductors such as Cu 2 HgI 4 [9], CsPbI 3 [10], BiOI [11] and Zn(Cu)O [12] for direct conversion low-dose (mGy) x-ray sensors based on the x-ray-induced photocurrent measurements under biased condition. In general, a semiconductor with high x-ray attenuation is an ideal candidate for such sensor development.…”

Section: Introductionmentioning

confidence: 99%

Dose-dependent x-ray sensing nature of nanocrystalline bismuth phosphate thick films

Begum

Karthieka

Kumar

et al. 2020

Semicond. Sci. Technol.

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Bismuth and its compounds have been used in various optoelectronic devices because of their unique physical properties and non-toxic nature. In this present study, nanocrystalline bismuth phosphate (BiPO4) was synthesized by solid-state double exchange reaction and then processed at 150 °C for 30 min under nitrogen gas flow. The phase, morphology, purity and band gap of the sample were analyzed respectively using x-ray diffraction, scanning electron microscopy-energy dispersive x-ray, Fourier transform infrared, Raman and diffuse reflectance spectroscopy. The obtained results reveal that the sample exists in hexagonal phase with crystallites in sub-spherical morphology (∼84 nm) and having a direct transition band gap of 4.52 eV. Furthermore, the x-ray attenuating nature of nanocrystalline BiPO4 thick film was examined using an intra-oral diagnostic x-ray machine interfaced with a Suniray-2 radiography image sensor. A theoretical validation of the obtained x-ray attenuating nature was carried out using the NIST-XCOM online resource. Then, x-ray-induced photocurrent was measured for nanocrystalline BiPO4 thick (200 µm) film for four different doses (mGy) exposed under biased condition (2 V). A grain boundary double Schottky potential barrier height (ϕb) model was applied to explain the observed linear dose-dependent x-ray sensing nature.

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Nanocomposite thick films of CsPbI3: PVDF-HFP on plastics for direct conversion low-dose X-ray sensor

Cited by 15 publications

References 31 publications

Polymer-BiI3 composites for high-performance, room-temperature, direct X-ray detectors

Polymer-BiI3 composites for high-performance, room-temperature, direct X-ray detectors

Anodic synthesis of TiO₂ nanotubes by step-up voltages

Dose-dependent x-ray sensing nature of nanocrystalline bismuth phosphate thick films

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Nanocomposite thick films of CsPbI3: PVDF-HFP on plastics for direct conversion low-dose X-ray sensor

Cited by 15 publications

References 31 publications

Polymer-BiI3 composites for high-performance, room-temperature, direct X-ray detectors

Polymer-BiI3 composites for high-performance, room-temperature, direct X-ray detectors

Anodic synthesis of TiO2 nanotubes by step-up voltages

Dose-dependent x-ray sensing nature of nanocrystalline bismuth phosphate thick films

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Product

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Anodic synthesis of TiO₂ nanotubes by step-up voltages