Crystallization at room temperature from amorphous to trigonal selenium as a byproduct of the synthesis of water dispersible zinc selenide

Pinto, Alexandre H.; Leite, Edson Roberto; Longo, Elson; Camargo, Emerson R.

doi:10.1016/j.matlet.2012.07.067

Cited by 25 publications

(23 citation statements)

References 22 publications

(27 reference statements)

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“…In addition, Zhang and others reported that heating of colloidal solution of amorphous SeNPs at 90°C caused the transformation to trigonal form (Zhang et al, 2012 ). Pinto et al even shown that this transformation is even possible as a spontaneous process at room temperature during the time (Pinto et al, 2012 ). The crystallinity of SeNPs was proven as an important factor for its bioavailability and bioactivity (Zhang et al, 2012 ).…”

Section: Resultsmentioning

confidence: 99%

Comparative Study of the Antimicrobial Activity of Selenium Nanoparticles With Different Surface Chemistry and Structure

Filipović

Ušjak

Milenković

et al. 2021

Front. Bioeng. Biotechnol.

114

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Although selenium nanoparticles (SeNPs) have gained attention in the scientific community mostly through investigation of their anticancer activity, a great potential of this nanomaterial was recognized recently regarding its antimicrobial activity. The particle form, size, and surface chemistry have been recognized as crucial parameters determining the interaction of nanomaterials with biological entities. Furthermore, considering a narrow boundary between beneficial and toxic effects for selenium per se, it is clear that investigations of biomedical applications of SeNPs are very demanding and must be done with great precautions. The goal of this work is to evaluate the effects of SeNPs surface chemistry and structure on antimicrobial activity against several common bacterial strains, including Staphylococcus aureus (ATCC 6538), Enterococcus faecalis (ATCC 29212), Bacillus subtilis (ATCC 6633), and Kocuria rhizophila (ATCC 9341), as well as Escherichia coli (ATCC 8739), Salmonella Abony (NCTC 6017), Klebsiella pneumoniae (NCIMB 9111) and Pseudomonas aeruginosa (ATCC 9027), and the standard yeast strain Candida albicans (ATCC 10231). Three types of SeNPs were synthesized by chemical reduction approach using different stabilizers and reducing agents: (i) bovine serum albumin (BSA) + ascorbic acid, (ii) chitosan + ascorbic acid, and (iii) with glucose. A thorough physicochemical characterization of the obtained SeNPs was performed to determine the effects of varying synthesis parameters on their morphology, size, structure, and surface chemistry. All SeNPs were amorphous, with spherical morphology and size in the range 70–300 nm. However, the SeNPs obtained under different synthesis conditions, i.e. by using different stabilizers as well as reducing agents, exhibited different antimicrobial activity as well as cytotoxicity which are crucial for their applications. In this paper, the antimicrobial screening of the selected systems is presented, which was determined by the broth microdilution method, and inhibitory influence on the production of monomicrobial and dual-species biofilm was evaluated. The potential mechanism of action of different systems is proposed. Additionally, the cytotoxicity of SeNPs was examined on the MRC-5 cell line, in the same concentration interval as for antimicrobial testing. It was shown that formulation SeNPs-BSA expressed a significantly lower cytotoxic effect than the other two formulations.

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Section: Resultsmentioning

confidence: 99%

Comparative Study of the Antimicrobial Activity of Selenium Nanoparticles With Different Surface Chemistry and Structure

Filipović

Ušjak

Milenković

et al. 2021

Front. Bioeng. Biotechnol.

114

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“…In regions of type II, lines at 117 and 185 cm -1 are observed, and the line at 185 cm -1 is more intense, which is characteristic of SnSe 2 [16]. The high intensities of the lines at 235 and 143 cm -1 indicate, that Se with a trigonal structure may still be present [17] (the peak at 143 cm -1 is too narrow to correspond to 2TA phonon scattering in ZnSe).…”

Section: Results Of Indexing Reflections In Diffractogramsmentioning

confidence: 97%

“…For sample 1 (х = 0.02), lines specific to α-SnSe (70-75, 108-110, 130-133, 150, 185-187 cm -1 ) are defined in the I type areas [16]. Some low-intensity lines are observed in the region of 235 and 254 cm -1 , the 235 cm -1 line can be attributed to Se, with a trigonal structure [16,17], the 254 cm -1 line can be attributed to amorphous Se [16,17]. In regions of type II, lines at 117 and 185 cm -1 are observed, and the line at 185 cm -1 is more intense, which is characteristic of SnSe 2 [16].…”

Section: Results Of Indexing Reflections In Diffractogramsmentioning

confidence: 99%

Surface Morphology and Phase Composition of (Zn,Sn)Se Thin Films, Obtained by Chemical-Molecular Beam Deposition

Razykov¹,

Kuchkarov

Тиванов

et al. 2021

Appl. Sol. Energy

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“…In addition, after the annealing temperature 250 0 C, the formation of SnSe2 phase occurred. Raman analysis showed that asgrown sample has their peaks which indicate two Te peaks and one Se peak [15][16]. After the post-annealing process, the Se peak disappeared.…”

Section: Resultsmentioning

confidence: 99%

Sn-Se-Te İnce Filmlerinin Üretimi ve Yapısal Karakterizasyonu

Surucu

2018

European Journal of Science and Technology

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In this study, the effects of Se and Te substitution on structural and morphological properties of SnSeTe (TSeTe) thin films are studied. TSeTe thin films are fabricated by using the thermal evaporation technique. In order to determine the structural and morphological properties of these films, XRD (X-ray diffraction), SEM (Scanning electron microscopy), EDXA (Energy dispersive X-Ray analysis), Raman Analysis, and AFM (Atomic Force Microscopy) measurements are carried out. Then, the effects of post-annealing on properties of thin films are investigated.

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Crystallization at room temperature from amorphous to trigonal selenium as a byproduct of the synthesis of water dispersible zinc selenide

Cited by 25 publications

References 22 publications

Comparative Study of the Antimicrobial Activity of Selenium Nanoparticles With Different Surface Chemistry and Structure

Comparative Study of the Antimicrobial Activity of Selenium Nanoparticles With Different Surface Chemistry and Structure

Surface Morphology and Phase Composition of (Zn,Sn)Se Thin Films, Obtained by Chemical-Molecular Beam Deposition

Sn-Se-Te İnce Filmlerinin Üretimi ve Yapısal Karakterizasyonu

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