Contamination of TiO2 thin films spin coated on rutile and soda–lime–silica substrates

Kabir, Imrana I.; Sheppard, L. R.; Shahmiri, Reza; Liu, R.; Le, Anh Huy Tuan; Lü, Xinxin; Hanaor, Dorian; Chen, Wen-Fan; Koshy, Pramod; Sorrell, Charles Christopher

doi:10.1007/s10853-020-04592-9

Cited by 5 publications

(4 citation statements)

References 130 publications

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“…By comparing those two spectra with the spectra of the bioplastics presented in this work, it was possible to deduce that the packaging of the vegetable was PBAT, while the packaging of the fresh cheese was BB951, both of them being biodegradable (Figure 8). The only difference was visible in the packaging of the fresh cheese: the peaks at 449 and 603 cm −1 were ascribed to the rutile vibrations of TiO 2, which gives the packaging its white color and could be also used as a bactericide [51,52].…”

Section: Test On Unknown Packagingsmentioning

confidence: 99%

Study of the Degradation of Biobased Plastic after Stress Tests in Water

Ambrosio¹,

Faglia

Tagliabue³

et al. 2021

Coatings

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Research on compostable bioplastics has recently obtained performances comparable to traditional plastics, like water vapor permeability, sealability, and UV transmission. Therefore, it is crucial to create new tools that help the developers of new polymeric composites study them quickly and cost-effectively. In this work, Raman spectroscopy (RS) was proposed as a versatile tool to investigate the degradation of biobased plastics after a stress test in water: this approach is a novelty for food packaging. Treatments at room temperature (RT) and 80 °C were selected, considering that these biopolymers can be used to packaging ready meals. The investigation was carried out on single-layer sheets of poly-lactic acid (PLA), cellulose ester (CE), poly-butylene succinate (PBS), poly-butylene adipate-co-terephthalate (PBAT), and a new composite material obtained by coupling CE and PBS (BB951) and PLA and CE (BB961). The vibrational modes of the water-treated materials at RT and 80 °C were compared to the Raman spectra of the pristine bioplastic, and the morphologies of the polymers were analyzed by scanning electron microscopy (SEM) and optical microscopy. Composite sheets were the plastics which were mostly affected by the 80 °C treatment in water, through changes in morphology (wrinkling with alternate white and transparent zones), as was especially the case for BB951. The Raman spectra acquired in different zones showed that the vibrations of BB951 were generally maintained in transparent zones but reduced or lacking in white zones. At the same time, the single-layer materials were almost unchanged. For BB961, the Raman vibrations were only slightly modified, in agreement with the visual inspection. The results suggest that RS detects the specific chemical bond that was modified, helping us understand the degradation process of biobased plastics after water treatment.

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Section: Test On Unknown Packagingsmentioning

confidence: 99%

Study of the Degradation of Biobased Plastic after Stress Tests in Water

Ambrosio¹,

Faglia

Tagliabue³

et al. 2021

Coatings

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“…In this case, it is due to the defects from the additional content in the PVA nanoparticles [12], thus a large number of TiO2 appears to have agglomerated on the ZnO-PVA as seen in Figure 1(d). were found in the nanocomposite due to the use of the glass substrate and the resulting process of annealing [13]. The EDX spectra show the atomic and weight percentages of the elemental content present in the thin film of the ZnO-PVA and ZnO-PVA-TiO2 nanocomposites, it is shown in Table 1.…”

Section: Characterization Of the Synthesized Zno-pva Nanocompositementioning

confidence: 99%

Optical Properties of TiO₂ Doped ZnO-PVA Nanocomposites

Ismardi,

Nasir,

Khoiri

et al. 2023

J. Phys.: Conf. Ser.

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One of the materials with the greatest potential for use in flexible devices is semiconductor nanocomposite material. In this paper, we report the synthesis of ZnO-PVA-TiO2 nanocomposite to be applied as a flexible optical sensor device. The optical property of ZnO-PVA nanocomposite is improved by the addition of TiO2 in this work. The optical characteristics of the ZnO-PVA nanocomposite depend on the concentration of TiO2. Spin coating method was successfully used to synthesize ZnO-PVA-TiO2 with various TiO2 concentrations of 1%, 2%, and 3% w/v, respectively. The absorbance spectrum of ZnO-PVA-TiO2 nanocomposite changes with the addition of TiO2. The absorbance peaks of ZnO-PVA-TiO2 nanocomposites were shifting to a lower wavelength, resulting in increasing the nanocomposite band gap energy. According to this result, future applications of the flexible optical sensor are one of the potential devices based on this study.

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“…The authors of [1] wish to state explicitly that all of the data for the rutile thin films deposited on (001) oriented rutile substrates are for a single control sample and have been included in this article solely for the purpose of comparative assessment. All of the rutile data have been published in the preceding publications [2] and [3].…”

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confidence: 99%