Nanocrystal–Organic Hybrid Antifungal Agent: High Level Oriented Assembly of Zinc Hydroxide Carbonate Nanocrystals in Chitosan

Song, Shisen; You, Bo; Zhu, Yin; Lin, Yandan; Wu, Yin; Ge, Xiaochun

doi:10.1021/cg401047a

Cited by 13 publications

(7 citation statements)

References 60 publications

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“…33 There was also a small component peak of 535 eV which was ascribed to several associations of oxygen atoms present in the arginine moieties. 39 Arginine being the only source of carbon and nitrogen, the appearance of carbon and nitrogen spectra in the Ag/ZnO HNRs clearly indicates the existence of arginine over the ZnO surface. The high resolution C 1s spectra were deconvoluted into three distinct peaks that correspond to the C-C bond (285.7 eV), and the carbon atoms bonded to different functional moieties of arginine (C-O/C-N at 286.3 eV; and CvO/ O-CvO at 290 eV).…”

Section: Characterizationmentioning

confidence: 96%

Arginine-assisted immobilization of silver nanoparticles on ZnO nanorods: an enhanced and reusable antibacterial substrate without human cell cytotoxicity

2015

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Silver-based hybrid nanomaterials are gaining interest as potential alternatives for conventional antimicrobial agents. Herein, we present a simple, facile and eco-friendly approach for the deposition of silver nanoparticles (AgNPs) on ZnO nanorods, which act as a nanoreactor for in situ synthesis and as an immobilizing template in the presence of arginine. The presence of arginine enhanced the stability of ZnO deposition on the glass substrate by hindering the dissolution of zinc under alkaline conditions. Various Ag/ZnO hybrid nanorod (HNR) samples were screened to obtain a high amount of silver immobilization on the ZnO substrate. Ag/ZnO HNRs displayed potent antibacterial ability and could achieve 100% kill for both Escherichia coli and Bacillus subtilis strains under various test conditions. The hybrid material mediated its dual mode of antibacterial action through direct contact-killing and release of silver ions/nanoparticles and showed superior bactericidal performance compared to pure ZnO nanorods and colloidal AgNPs. No significant decline in antibacterial efficacy was observed even after the same substrate was repeatedly reused multiple times. Interestingly, the amount of Ag and Zn release was much below their maximal limit in drinking water, thus preventing potential health hazards. Immobilized AgNPs showed no cytotoxic effects on the human hepatocarcinoma cell line (HepG2). Moreover, treating cells with the antibacterial substrate for 24 hours did not lead to significant generation of reactive oxygen species (ROS). The good biocompatibility and bactericidal efficacy would thus make it feasible to utilize this immobilization strategy for preparing new-generation antibacterial coatings.

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Section: Characterizationmentioning

confidence: 96%

Arginine-assisted immobilization of silver nanoparticles on ZnO nanorods: an enhanced and reusable antibacterial substrate without human cell cytotoxicity

2015

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“…These results suggest that the formation of LZHC in this Zn(DDAB) 2 -urea system is via a stepwise reaction as follows: Zn(DDAB) 2 → LZHDC → LZHC. It is noteworthy that the synthesis process occurred via a crystalline and component transformation in this work is significantly different from the classical process that proceeds via a transformation from amorphous phase to promotional crystalline …”

Section: Resultsmentioning

confidence: 93%

“…Usually, the LZHs are obtained via solution methods, including hydrothermal methods mainly performed in basic media such as ammonia, hexamethylenetetramine, and urea. − The morphology of LZHs and distance between the brucite-type layers could be varied depending on the kinds of interlamellar species. , As a typical lamellar salt, the layered zinc hydroxide carbonate (LZHC) is composed of zinc hydroxide layers combined with carbonate ions and water molecules. In a typical synthesis process of LZHC, the crystalline evolution proceeds from the amorphous phase to a well-crystallized phase with a nearly invariable distance between the zinc hydroxide layers, and the morphology of LZHC made in these processes is always unitary 2D structure with a disordered stacking of nanosheets. , To obtain uniform LZHC with various unique three-dimensional (3D) morphologies remains a significant challenge. It has been attempted to introduce some surfactants such as CTAB, F127, and P123 as structure-directing agents into the reaction system. − However, these agents are often absorbed on the surface of LZHC and therefore fail to bring about the variety of basal spacing due to the unchanged interlamellar anions.…”

Section: Introductionmentioning

confidence: 99%

A Series of Unique Architecture Building of Layered Zinc Hydroxides: Self-Assembling Stepwise Growth of Layered Zinc Hydroxide Carbonate and Conversion into Three-Dimensional ZnO

Song¹,

Wang²,

Cui³

et al. 2016

Crystal Growth & Design

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A series of uniformly unique three-dimensional (3D) structures of layered zinc hydroxides (LZHs) were synthesized via a hydrothermal method. During the process, two kinds of LZHs with different crystal structures could be formed, depending on the ionic groups intercalated in zinc hydroxide layers: when carbonate anions were the only interlayer ions, the corresponding LZH compound was assigned as LZHC or zinc hydroxide carbonate; when the interlayer ions contained both carbonate anions and long-chain quaternary ammonium groups, the corresponding LZH compound was denominated as LZHDC. Interestingly, the LZHDC is transformed into LZHC though a structure and compositional transformation involving an exchange of long-chain quaternary ammonium groups by carbonate anions. We propose a stepwise growth and anion exchange mechanism involving conversion from zinc precursor to LZHDC to LZHC. We demonstrated the utility the LZHs obtained in the process as self-sacrificial templates for formation novel 3D ZnO structures by pyrolysis.

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“…TiO 2 NPs is useful as protective encapsulating agents that increase adhesive force in the interspecies relation between bacteria and plants (Chowdhury et al 2012;Webster et al 2008). Ruffolo et al (2010) and Song et al (2014) found that ZnTiO 3 and Zn hydroxide carbonate NPs showed higher growth inhibition efficiency of A. niger and fungal activity against cotton Verticillium, Rhizopus, Mucorales than ZnONPs, respectively. Abd-Elsalam (2013) and Mahendra et al (2012) showed that application of NPs grower-friendly in agriculture need to be readily used for protecting crops and avoiding loss to plant pathogens diseases.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of nano Zinc and using of some nanoparticles in reducing of Cercospora leaf spot disease of sugar beet in the field

Farahat¹

2018

EBSS

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B IOSYNTHESIS of Zn nanoparticles(NPs) from 32 various plant samples were tested and subjected to 11 samples of ZnONPs from plant aqueous extracts, wherever, ZnNo 3 (1mmole) was used as precursor to synthesizing of ZnONPs. The UV-Vis spectral analysis of Morus nigra and Grevillea robusta plant leaves mix extracts (reaction mixture) were confirmed and showed performance of Zn NPs and exhibited as new sources for clean production and could be explored in various fields. During two tested seasons 2015/2016 and 2016/2017 and field conditions showed that, NPs of Ti followed by Zn caused to reducing of cercospora leaf spot (CLS) disease severity percentage of sugar beet plants and enhancement of TSS and sucrose contents, especially under high disease severity stress in season 2015/2016 compared to protected plants by eminent fungicide and control. NPs led to activation and recorded high enzymes activity values of enzymes of peroxidase up to 6 min and polyphenoloxidase up to 4 min estimation periods compared to control, so exhibited as mechanism in defense against CLS disease. Unseasonable weather conditions of temperature degrees, relative humidity percentage, wind velocity, pan evaporation and rain played an essential role in changement of CLS disease severity and susceptibility under field conditions during two tested seasons. The results recorded high percentages with first date of planting in September month in the first season of 2015/2016 with seven sugar beet genotypes than the second ones of October month and season of 2016/2017.

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Nanocrystal–Organic Hybrid Antifungal Agent: High Level Oriented Assembly of Zinc Hydroxide Carbonate Nanocrystals in Chitosan

Cited by 13 publications

References 60 publications

Arginine-assisted immobilization of silver nanoparticles on ZnO nanorods: an enhanced and reusable antibacterial substrate without human cell cytotoxicity

Arginine-assisted immobilization of silver nanoparticles on ZnO nanorods: an enhanced and reusable antibacterial substrate without human cell cytotoxicity

A Series of Unique Architecture Building of Layered Zinc Hydroxides: Self-Assembling Stepwise Growth of Layered Zinc Hydroxide Carbonate and Conversion into Three-Dimensional ZnO

Biosynthesis of nano Zinc and using of some nanoparticles in reducing of Cercospora leaf spot disease of sugar beet in the field

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