Synthesis of Ag Nanostructures by Photochemical Reduction Using Citrate-Capped Pt Seeds

Park, Hyeong‐Ho; Zhang, Xin; Choi, Yong June; Park, Hyung Ho; Hill, Ross H.

doi:10.1155/2011/265287

Cited by 17 publications

(16 citation statements)

References 25 publications

(38 reference statements)

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“…In this method, a peak at 345 nm would verify the presence of silver nanoparticles (23). In our study, the results obtained from XRD at 111, 200, 220, 311 and 222 were consistent with the reference card of silver nanocrystals (JCPDS 04-0783) (24). However, only at angle of 24.8°, the result of XRD was similar to the reference card of Ag 2 O (JCPDS 76-1393) (25).…”

Section: / Kazemi and Colleaguessupporting

confidence: 87%

Biosynthesis of Silver Nanoparticles Using Bacteria Isolates from Wastewater

2017

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Background and Objectives: Development of ecofriendly processes for the synthesis of metal nanoparticles is of great importance in the field of nanotechnology. Microorganisms such as bacteria could be suitable candidates for bioproduction of nanoparticles due to their simplicity and high compatibility with the environment. The aim of this study was to use bacteria isolates from the effluent of wastewater treatment plants to produce silver nanoparticles. Methods: For identifying silver-resistant microorganisms, we used the agar diffusion method using PHG II medium containing 0.5 mM silver to determine minimum inhibitory concentration. Bacterial identification was done with biochemical testing and polymerase chain reaction (colony PCR). Finally, silver nanoparticles were produced in the desired bacteria, and the properties of these nanoparticles were studied. Results: We found five silver-resistant bacteria among which Stenotrophomonas maltophilia strain MS8 showed the highest resistance (MIC= 6 mM). The bacterium was able to synthesize silver nanoparticles in spherical shapes. The results obtained from visual observations using UV-VIS, TEM and XRD showed that the bacterium was able to reduce silver ions into silver nanoparticles with maximum size of 20 nm. Conclusion: Based on our findings, this bacterium could be useful for biosynthesis of silver nanoparticles.

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Section: / Kazemi and Colleaguessupporting

confidence: 87%

Biosynthesis of Silver Nanoparticles Using Bacteria Isolates from Wastewater

2017

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“…Based on the findings of Figure 1, the nanocrystals of mango core were consistent with silver nanocrystal reference card (JCDD04-0783) on 111, 200, 220 levels at 60°C. 12 In this project, the results of the UV-VIS graph had a specific absorption peak at 345 nm, and also showed a peak at 278 nm. The results of analyzing the TEM images according to Figure 3 indicated the production of mango core nanoparticles in spherical cubic and the size of 65 nm.…”

Section: Discussionmentioning

confidence: 69%

The Biological Synthesis of Silver Nanoparticles by Mango Plant Extract and Its Anti-Candida Effects

Salati

Doudi

Madani

2018

J Apple Biotechnol Rep

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Introduction: In recent years, using plant products alone and along with metal nanoparticles has been widely considered in preventing or killing pathogens including fungi. Increasing the use of chemical drugs has increased the resistance of pathogenic fungi. The present study aimed at investigating the biological synthesis of silver nanoparticles by mango plant extract and its anti-Candida effects. Materials and Methods: First, the Indian mangoes were bought from the Isfahan fruit and vegetable market and the kernel were extracted. Then, the nanoparticles synthesis was conducted on mango cores and the synthesized nanoparticles were evaluated using a UV-VIS, X-ray diffraction (XRD) machine and a transient electron microscope. In this study, the anti-Candida effects of mango core nanoparticles was evaluated on 21 clinical isolates and 3 standard strains of Candida including Candida albicans PPTCC 5027, Candida glabrata PTCC 5297 and Candida krusei PTCC 5295 using a quantitative micro dilution method (serial dilution in tubes). For data analysis, ANOVA test and SPSS version 22 software were used at the significance level of P ≤ 0.05. Duncan test was also used to analyze the groups. Results: Based on the results, the synthesized nanoparticles were cubic and 65 nm in size. Among the clinical isolates, C. albicans with the frequency of 52.38% and C. glabrata with the frequency of 4.76% had the highest and lowest frequency among the 21 clinical isolates. C. glabrata had the most sensitivity with the quantitative serial dilution method (microdilution) with minimum inhibitory concentration (MIC) of fungal growth (0.016 mg/mL) and the minimum lethal concentration of fungi (0.032 mg/mL) against the nanoparticles of mango core (P ≤ 0.001). Conclusions: The inhibitory effect of the mango core nanoparticles after fluconazole on the majority of clinical and standard strains of Candida had a direct relationship with the increasing concentrations of this substance. However, further studies are required for determining the effect of this bio-nanoparticle on the treatment of Candida infections in human beings.

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“…Хімічний синтез наночастинки золота (Au-НЧ) здійснюють відновленням гідрогентетрахлороаурумату L-триптофа ну [10], тринатрій цитрату [13], натрій боргідриду [2] та ін. Наночастинки срібла (Ag-НЧ) зазвичай одержують методом відновлення арґентум нітрату етиленгліколем [17] або глюкозою [14]. Проста процедура синтезу НМ і їхня спорідненість до багатьох біологічних молекул, у тому числі ферментів, робить їх привабливими для використання в сенсорних технологіях [9].…”

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