High-resolution particle size and shape analysis of the first Samarium nanoparticles biosynthesized from aqueous solutions via cyanobacteria Anabaena cylindrica

Fritz, Melanie; Körsten, Susanne; Chen, Xiaochen; Yang, Guowei; Lv, Yuancai; Liu, Minghua; Wehner, Stefan; Fischer, Christian B.

doi:10.1016/j.impact.2022.100398

Cited by 12 publications

(11 citation statements)

References 32 publications

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“…The biosynthesis experiments of AuNPs and CeNPs were performed according to the previously established methods [ 22 , 23 , 25 ]. Briefly, the stock cultures of the cyanobacteria Anabaena sp.…”

Section: Methodsmentioning

confidence: 99%

“…The system was operated at 100 kV acceleration voltage. The preparation procedure followed the established protocols and has been described in detail in previous studies [ 22 , 23 , 25 ].…”

Section: Methodsmentioning

confidence: 99%

“…The formation of CeNPs takes longer, which is further complicated by the fact that the CeNPs formed have no sharp edges compared to their background due to their amorphous structure. This makes it more difficult to detect CeNPs than the other rare earth element NPs used in our previous studies [ 23 , 25 , 26 ]. This paper is dedicated to the previously established tool for the detection of AuNPs in the range down to ~2 nm, and the easy-to-use Anabaena sp.…”

Section: Introductionmentioning

confidence: 99%

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Gold Nanoparticles Bioproduced in Cyanobacteria in the Initial Phase Opened an Avenue for the Discovery of Corresponding Cerium Nanoparticles

Fritz,

Chen,

Yang

et al. 2024

Microorganisms

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The production of isolated metallic nanoparticles with multifunctionalized properties, such as size and shape, is crucial for biomedical, photocatalytic, and energy storage or remediation applications. This study investigates the initial particle formations of gold nanoparticles (AuNPs) bioproduced in the cyanobacteria Anabaena sp. using high-resolution transmission electron microscopy images for digital image analysis. The developed method enabled the discovery of cerium nanoparticles (CeNPs), which were biosynthesized in the cyanobacteria Calothrix desertica. The particle size distributions for AuNPs and CeNPs were analyzed. After 10 h, the average equivalent circular diameter for AuNPs was 4.8 nm, while for CeNPs, it was approximately 5.2 nm after 25 h. The initial shape of AuNPs was sub-round to round, while the shape of CeNPs was more roundish due to their amorphous structure and formation restricted to heterocysts. The local PSDs indicate that the maturation of AuNPs begins in the middle of vegetative cells and near the cell membrane, compared to the other regions of the cell.

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Section: Methodsmentioning

confidence: 99%

“…The system was operated at 100 kV acceleration voltage. The preparation procedure followed the established protocols and has been described in detail in previous studies [ 22 , 23 , 25 ].…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gold Nanoparticles Bioproduced in Cyanobacteria in the Initial Phase Opened an Avenue for the Discovery of Corresponding Cerium Nanoparticles

Fritz,

Chen,

Yang

et al. 2024

Microorganisms

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“…The parameters used in Equations (1)–(3) were taken from Igathinathane’s object identification strategy and are standard outputs generated by ImageJ to evaluate particles shape and size [ 36 ]. The exact procedure for particle size and shape analysis can be found in detail in the previous work of the authors [ 37 ].…”

Section: Methodsmentioning

confidence: 99%

Time-Dependent Size and Shape Evolution of Gold and Europium Nanoparticles from a Bioproducing Microorganism, a Cyanobacterium: A Digitally Supported High-Resolution Image Analysis

et al. 2022

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Herein, the particle size distributions (PSDs) and shape analysis of in vivo bioproduced particles from aqueous Au3+ and Eu3+ solutions by the cyanobacterium Anabaena sp. are examined in detail at the nanoscale. Generally, biosynthesis is affected by numerous parameters. Therefore, it is challenging to find the key set points for generating tailored nanoparticles (NPs). PSDs and shape analysis of the Au and Eu-NPs were performed with ImageJ using high-resolution transmission electron microscopy (HR-TEM) images. As the HR-TEM image analysis reflects only a fraction of the detected NPs within the cells, additional PSDs of the complete cell were performed to determine the NP count and to evaluate the different accuracies. Furthermore, local PSDs were carried out at five randomly selected locations within a single cell to identify local hotspots or agglomerations. The PSDs show that particle size depends mainly on contact time, while the particle shape is hardly affected. The particles formed are distributed quite evenly within the cells. HR-PSDs for Au-NPs show an average equivalent circular diameter (ECD) of 8.4 nm (24 h) and 7.2 nm (51 h). In contrast, Eu-NPs preferably exhibit an average ECD of 10.6 nm (10 h) and 12.3 nm (244 h). Au-NPs are classified predominantly as “very round” with an average reciprocal aspect ratio (RAR) of ~0.9 and a Feret major axis ratio (FMR) of ~1.17. Eu-NPs mainly belong to the “rounded” class with a smaller RAR of ~0.6 and a FMR of ~1.3. These results show that an increase in contact time is not accompanied by an average particle growth for Au-NPs, but by a doubling of the particle number. Anabaena sp. is capable of biosorbing and bioreducing dissolved Au3+ and Eu3+ ions from aqueous solutions, generating nano-sized Au and Eu particles, respectively. Therefore, it is a low-cost, non-toxic and effective candidate for a rapid recovery of these sought-after metals via the bioproduction of NPs with defined sizes and shapes, providing a high potential for scale-up.

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“…A. cylindrica was discovered to be an appropriate representative microorganism for green Sm recovery and the production of easily identifiable Sm NPs. A. cylindrica was only effective in its HCs and not in its vegetative cells (VCs), which had an average size of 9-12 nm [169,170].…”

Section: Samarium and Samarium Oxide Nanoparticles (Sm And Sm 2 O 3 Nps)mentioning

confidence: 99%

Green Nanotechnology: Recent Research on Bioresource-Based Nanoparticle Synthesis and Applications

Alqarni

Alghamdi

Alshahrani

et al. 2022

Journal of Chemistry

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In the last decades, the idea of green nanotechnology has been expanding, and researchers are developing greener and more sustainable techniques for synthesizing nanoparticles (NPs). The major objectives are to fabricate NPs using simple, sustainable, and cost-effective procedures while avoiding the use of hazardous materials that are usually utilized as reducing or capping agents. Many biosources, including plants, bacteria, fungus, yeasts, and algae, have been used to fabricate NPs of various shapes and sizes. The authors of this study emphasized the most current studies for fabricating NPs from biosources and their applications in a wide range of fields. This review addressed studies that cover green techniques for synthesizing nanoparticles of Ag, Au, ZnO, CuO, Co3O4, Fe3O4, TiO2, NiO, Al2O3, Cr2O3, Sm2O3, CeO2, La2O3, and Y2O3. Also, their applications were taken under consideration and discussed.

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High-resolution particle size and shape analysis of the first Samarium nanoparticles biosynthesized from aqueous solutions via cyanobacteria Anabaena cylindrica

Cited by 12 publications

References 32 publications

Gold Nanoparticles Bioproduced in Cyanobacteria in the Initial Phase Opened an Avenue for the Discovery of Corresponding Cerium Nanoparticles

Gold Nanoparticles Bioproduced in Cyanobacteria in the Initial Phase Opened an Avenue for the Discovery of Corresponding Cerium Nanoparticles

Time-Dependent Size and Shape Evolution of Gold and Europium Nanoparticles from a Bioproducing Microorganism, a Cyanobacterium: A Digitally Supported High-Resolution Image Analysis

Green Nanotechnology: Recent Research on Bioresource-Based Nanoparticle Synthesis and Applications

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