Dielectric investigation and material properties of almond gum thin films deposited by spray pyrolysis

Seck, Mamadou; Diallo, Abdou Karim; Erouel, Mohsen; Saadi, Meriem; Tiss, B.; Wederni, M.A.; Tall, Abdoulaye; Ly, El Hadji Babacar; Kobor, Diouma; Bouguila, N.; Khirouni, K.

doi:10.1016/j.matchemphys.2021.124917

Cited by 8 publications

(7 citation statements)

References 48 publications

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“…The alterations in ϵ′ and ϵ“ for the NaMnPO 4 compound appear in Figure 15 (a, b). The sample is appropriate for high‐frequency uses, as the values of ϵ′ and ϵ′′ are considerably higher at lower frequencies and decrease gradually as frequency increases [70] …”

Section: Resultsmentioning

confidence: 99%

“…The sample is appropriate for highfrequency uses, as the values of ɛ' and ɛ'' are considerably higher at lower frequencies and decrease gradually as frequency increases. [70] At lower frequencies, the decline in ɛ' and ɛ" values was rapid, while at higher frequencies, it was slower. Polarization effects, in particular interfacial and spatial polarization, can explain this sort of behavior.…”

Section: Permitivity Studymentioning

confidence: 96%

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Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO₄

Miladi,

Gzaiel,

Azaza

et al. 2024

Eur J Inorg Chem

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The development of multifunctional materials is an exceptional research area, which is aimed at enhancing the versatility of materials according to their wide fields of application. Special interest was devoted here to the orthophosphate compound, in particular, the olivine NaMnPO4 material. This compound was successfully synthesized by a solid‐state method and characterized using various techniques. Preliminary room‐temperature structural analysis evidences the sample formation in the orthorhombic structure and its phase purity. The material’s morphology, analyzed by scanning electron microscopy (SEM), is identified by a spherical grain size distribution. The average grain size of the sample was estimated to be around 420 nm. Moreover, the optical investigation of UV‐visible spectroscopy has revealed that the band gap for our sample is (Eg = 2.28 eV), which shows that our compound is a potential candidate for optoelectronic applications. The electrical behavior study's main results confirm the ferroelectric character of the sample and support the aim of deepening the knowledge of the material according to its thermally stimulated conduction processes through impedance spectroscopy. Electrical studies revealed the dominant transport processes across various temperature and frequency ranges, leading to the NSPT model. The frequency dependency relates to frequency‐dispersive dielectric spectra, conduction mechanisms, and relaxation phenomena.

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Section: Resultsmentioning

confidence: 99%

Section: Permitivity Studymentioning

confidence: 96%

Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO₄

Miladi,

Gzaiel,

Azaza

et al. 2024

Eur J Inorg Chem

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“…Higher contact angle corresponds to higher surface hydrophobicity of the films that will have higher surface water repellent ability. 24 The water contact xylan composite films are 96.20 and 83.57 , respectively. 26 The marginal increase in the hydrophobicity is likely to have resulted from more plasticizer in AC-G2 film.…”

Section: Discussionmentioning

confidence: 99%

“…30 Overall, the acid content in terms of titratable acidity (TA) of the produce was shown to decrease when the shelf life was increased by different methods. 24 The TA change of the fruits and vegetables were significantly reduced ( p ≤ 0.01) by AC-G1 formulation (Figures 3B and S3b). The coated tomatoes had a TA of about 0.176% on the 25th day while the uncoated sample had a similar TA on the 16th day itself, suggesting that the formulation delayed the ripening of the tomatoes by about 9 days (Figure 3B).…”

Section: Acidity Profile Of Tomato and Blueberrymentioning

confidence: 93%

Almond gum‐chitosan nanocomposite as edible formulation for advancing postharvest longevity of fruits and vegetables

Suresh,

SenthilKumar,

Pushparaj

et al. 2024

Polymers for Advanced Techs

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Postharvest produces including fruits and vegetables are perishable and require preservation for prolonged shelf life. Edible coatings are emerging as a safe and value‐added alternative for traditional preservation methods such as refrigeration and chemical treatments. In this article, we have developed almond gum/chitosan (AC)‐based edible coating/formulation and investigated the effectiveness of coating on improving the shelf life of tomatoes and blueberries. The coated tomatoes and blueberries, after a shelf life of 25 and 20 days, respectively exhibited a significant improvement in weight loss (5%–20%), reduced acidity (1–3 folds), and kept the ascorbic acid content lower when compared to the uncoated tomatoes and blueberries. Both the coated tomatoes and blueberries did not exhibit spoilage indicating antimicrobial activity of the coating. Direct testing of the coating formulations exhibited significant anti‐microbial activity against Staphyococcus aureus and Pseudomonas aeroginosa. The polymer films, prepared using the coating formulation, exhibited low moisture content (34.8 ± 2.02% and 41.5 ± 1.34%), low solubility (42.56 ± 2.3% and 31.31 ± 3.1%), low tensile strength (0.34 ± 0.05 N m−2 and 0.75 ± 0.07 N m−2) and high elongation (63.2 ± 4.12% and 71.5 ± 3.8%). These measured film properties confirm that the polymer film has good flexibility and is suitable for edible packaging. Overall, the newly developed AC edible coating exhibits significant potential for a wide range of applications within the food processing industry, offering a viable substitute for conventional wax and lipid‐based coatings.

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“…The effect of the applied voltage on the measured capacitance at f = 1 kHz is depicted in Figure 5C. As can be seen, the capacitance per unit area C i remains constant when the applied voltage V varies between −4 and 4 V. Such stable electric behaviour of C i vs. V is highly desired because it guarantees the reliable operation of electronic devices (Cai et al, 2019;Seck et al, 2021).…”

Section: Characterization Of Cashew Gum-based Capacitorsmentioning

confidence: 99%

Towards sustainable, solution-processed organic field-effect transistors using cashew gum as the gate dielectric

Faraji,

Tall,

Mohammadian

et al. 2023

Front. Mater.

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To realize low-cost, environmentally friendly electronic devices and circuits, there is currently a strong trend to explore plant-based dielectric materials because they can be responsibly sourced from agricultural or forest vegetation, are generally water-soluble, and possess good electrical insulator properties. In this contribution, organic field-effect transistors (OFETs) using a biopolymer dielectric obtained from exudates of Anacardium occidentale Linn. trees, namely, cashew gum (CG), are reported. To characterise the physical and dielectric properties of the gum, thin films and metal-insulator-metal (MIM) capacitors were prepared and characterized. To evaluate the material’s performance in OFETs, bottom-gate top-contact (BGTC) p-channel poly [3,6-di(2-thien-5-yl)-2,5-di(2-octyldodecyl)-pyrrolo (3,4-c)pyrrole-1,4-dione) thieno (3,2-b) thiophene]:polymethyl methacrylate (DPPTTT:PMMA) transistors were engineered and studied. The fabricated MIM capacitors display a comparatively high areal capacitance of 260 nF/cm2 at 1 kHz for 130 nm thick films. As a result, the solution-processed DPPTTT:PMMA OFETs favourably operate at 3 V with the average saturation field-effect mobility equal to 0.20 cm2/Vs., threshold voltage around −1.4 V, subthreshold swing in the region of 250 mV/dec, and ON/OFF current ratio well above 103. As such, cashew gum emerges as a promising dielectric for sustainable manufacturing of solution-processed organic FETs.

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Dielectric investigation and material properties of almond gum thin films deposited by spray pyrolysis

Cited by 8 publications

References 48 publications

Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO₄

Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO₄

Almond gum‐chitosan nanocomposite as edible formulation for advancing postharvest longevity of fruits and vegetables

Towards sustainable, solution-processed organic field-effect transistors using cashew gum as the gate dielectric

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Dielectric investigation and material properties of almond gum thin films deposited by spray pyrolysis

Cited by 8 publications

References 48 publications

Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO4

Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO4

Almond gum‐chitosan nanocomposite as edible formulation for advancing postharvest longevity of fruits and vegetables

Towards sustainable, solution-processed organic field-effect transistors using cashew gum as the gate dielectric

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Product

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About

Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO₄

Investigation of Morphology, Optical and Electronic Ac Conduction of the Olivine Manganite Compound: NaMnPO₄