Effects of Oxygen (O2) Plasma Treatment in Promoting the Germination and Growth of Chili

Ahmed, Naeem; Masood, Asad; Siow, Kim Shyong; Wee, M. F. Mohd Razip; Haron, Farah Farhanah; Patra, Anuttam; Nayan, Nafarizal; Soon, Chin Fhong

doi:10.1007/s11090-021-10206-2

Cited by 18 publications

(23 citation statements)

References 42 publications

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“…This damage hurts the seeds’ germination and growth; higher electrical conductivity is also associated with more dead seeds, as reported elsewhere 15 . On the other hand, a moderate rise in electrical conductivity was associated with the positive interaction between water uptake and active plasma species introduced on the seed surface by cold plasma-treatment as described in our previous studies 10 , 16 , 17 . This moderate rise in electrical conductivity is useful for germination and growth; the leaching of nutrients and sugar contents was useful to provide the initial energy for germination 17 .…”

Section: Resultssupporting

confidence: 60%

“…Increase in water uptake was also attributed to the effect of vacuum because the seeds were simultaneously exposed to vacuum during low-pressure plasma-treatment. The physical and chemical changes on the seeds acted simultaneously to facilitate the seed germination and growth, as investigated in our previous studies 10 , 16 . However, ageing deteriorated these enhanced properties amongst the plasma-treated seeds, which were reflected by a decrease in the measurement values of the different tests explained in methodology section for 60 days, albeit still higher than the untreated values.…”

Section: Discussionmentioning

confidence: 91%

“…Water uptake measurements were carried out using an earlier described method with modifications 10 , 16 . Because of the considerable variation in size, each species has a different sample size.…”

Section: Methodsmentioning

confidence: 99%

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A study to examine the ageing behaviour of cold plasma-treated agricultural seeds

Ahmed

Siow

Wee

et al. 2023

Sci Rep

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Cold plasma (low pressure) technology has been effectively used to boost the germination and growth of various crops in recent decades. The durability of these plasma-treated seeds is essential because of the need to store and distribute the seeds at different locations. However, these ageing effects are often not ascertained and reported because germination and related tests are carried out within a short time after the plasma-treatment. This research aims to fill that knowledge gap by subjecting three different types of seeds (and precursors): Bambara groundnuts (water), chilli (oxygen), and papaya (oxygen) to cold plasma-treatment. Common mechanisms found for these diverse seed types and treatment conditions were the physical and chemical changes induced by the physical etching and the cold plasma on the seeds and subsequent oxidation, which promoted germination and growth. The high glass transition temperature of the lignin-cellulose prevented any physical restructuring of the surfaces while maintaining the chemical changes to continue to promote the seeds germination and growth. These changes were monitored over 60 days of ageing using water contact angle (WCA), water uptake, electrical conductivity, field emission scanning electron microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS). The vacuum effect was also investigated to separate its effect from cold plasma (low pressure). This finding offers a framework for determining how long agricultural seeds that have received plasma treatment can be used. Additionally, there is a need to transfer this research from the lab to the field. Once the impact of plasma treatment on seeds has been estimated, it will be simple to do so.

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Section: Resultssupporting

confidence: 60%

Section: Discussionmentioning

confidence: 91%

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A study to examine the ageing behaviour of cold plasma-treated agricultural seeds

Ahmed

Siow

Wee

et al. 2023

Sci Rep

Self Cite

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“…For the high-resolution spectra, the peak deconvolutions of C 1 s spectra were fitted using Gaussian curve fitting. During component fitting, the Shirley background was used to deduce the C 1 s spectra, and the full width at half maximum was set between 1.46 and 1.55 eV [ 39 , 40 ].…”

Section: Methodsmentioning

confidence: 99%

Atmospheric Pressure Plasma Polymerisation of D-Limonene and Its Antimicrobial Activity

et al. 2023

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Antibacterial coating is necessary to prevent biofilm-forming bacteria from colonising medical tools causing infection and sepsis in patients. The recent coating strategies such as immobilisation of antimicrobial materials and low-pressure plasma polymerisation may require multiple processing steps involving a high-vacuum system and time-consuming process. Some of those have limited efficacy and durability. Here, we report a rapid and one-step atmospheric pressure plasma polymerisation (APPP) of D-limonene to produce nano-thin films with hydrophobic-like properties for antibacterial applications. The influence of plasma polymerisation time on the thickness, surface characteristic, and chemical composition of the plasma-polymerised films was systematically investigated. Results showed that the nano-thin films deposited at 1 min on glass substrate are optically transparent and homogenous, with a thickness of 44.3 ± 4.8 nm, a smooth surface with an average roughness of 0.23 ± 0.02 nm. For its antimicrobial activity, the biofilm assay evaluation revealed a significant 94% decrease in the number of Escherichia coli (E. coli) compared to the control sample. More importantly, the resultant nano-thin films exhibited a potent bactericidal effect that can distort and rupture the membrane of the treated bacteria. These findings provide important insights into the development of bacteria-resistant and biocompatible coatings on the arbitrary substrate in a straightforward and cost-effective route at atmospheric pressure.

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“…Plasma ablation is the plasma-aided surface etching of materials, very similar to sputtering, without using any liquid etchant. A major share of plasma etching has been carried out with oxygen plasma [ 181 , 182 , 183 ] where oxygen, the precursor gas, was channeled into a vacuum chamber. During the process, the most peripheral layer of the substrate is etched off, and accordingly, a negligibly small weight loss occurs [ 184 , 185 ].…”

Section: Plasma Surface Modification (Psm)mentioning

confidence: 99%

Plasma Surface Engineering of Natural and Sustainable Polymeric Derivatives and Their Potential Applications

Pillai

Thomas

2023

Polymers

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Recently, natural as well as synthetic polymers have been receiving significant attention as candidates to replace non-renewable materials. With the exponential developments in the world each day, the collateral damage to the environment is incessant. Increased demands for reducing pollution and energy consumption are the driving force behind the research related to surface-modified natural fibers (NFs), polymers, and various derivatives of them such as natural-fiber-reinforced polymer composites. Natural fibers have received special attention for industrial applications due to their favorable characteristics, such as low cost, abundance, light weight, and biodegradable nature. Even though NFs offer many potential applications, they still face some challenges in terms of durability, strength, and processing. Many of these have been addressed by various surface modification methodologies and compositing with polymers. Among different surface treatment strategies, low-temperature plasma (LTP) surface treatment has recently received special attention for tailoring surface properties of different materials, including NFs and synthetic polymers, without affecting any of the bulk properties of these materials. Hence, it is very important to get an overview of the latest developments in this field. The present article attempts to give an overview of different materials such as NFs, synthetic polymers, and composites. Special attention was placed on the low-temperature plasma-based surface engineering of these materials for diverse applications, which include but are not limited to environmental remediation, packaging, biomedical devices, and sensor development.

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Effects of Oxygen (O2) Plasma Treatment in Promoting the Germination and Growth of Chili

Cited by 18 publications

References 42 publications

A study to examine the ageing behaviour of cold plasma-treated agricultural seeds

A study to examine the ageing behaviour of cold plasma-treated agricultural seeds

Atmospheric Pressure Plasma Polymerisation of D-Limonene and Its Antimicrobial Activity

Plasma Surface Engineering of Natural and Sustainable Polymeric Derivatives and Their Potential Applications

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