Microbial Synthesis of Metal Nanoparticles

2021 ◽  
pp. 143-199
Author(s):  
Nour Shafik El-Gendy ◽  
Hussein Nabil Nassar ◽  
James G. Speight
2019 ◽  
Vol 8 (3) ◽  
pp. 619-626

Nanoparticle synthesis requires a clean, non-poisonous and envioromental-compatible methods. Cations are absorbed on the surface layer of probiotics due to negative electro-kinetic potential of cell wall and this leads to biosynthesis of metal particles (usually nanoparticles). This review aims to track the field of biosynthesis of nanoparticles by probiotic bacteria. Therefore, after some introduction bout nanoparticles and the microbial synthesis, all metal nanoparticles/oxide nanoparticles produced by probiotics are reviewed including silver, zinc, zinc oxide, titanium, titanium oxide, selenium as well as Sb2O3, Gd2O3, CdS nanoparticles. Production of nanoparticles gives antibacterial properties to the microorganism. Consequently, such extraordinary properties for probiotics with their own several health beneficial effects is killing two birds with one stone. It can be concluded that the capability of microorganisms to make metal nanoparticles with favorable morphological features and ideal size ranges has introduced a new and intersting approach to nanoparticle synthesis.


2018 ◽  
Vol 34 (4) ◽  
pp. 529-559 ◽  
Author(s):  
Zahra Vaseghi ◽  
Ali Nematollahzadeh ◽  
Omid Tavakoli

Abstract Metal nanoparticles are being extensively used in a variety of sectors, including drug delivery, cancer treatment, wastewater treatment, DNA analysis, antibacterial agents, biosensors and catalysts. Unlike chemically produced nanoparticles, biosynthesized metal nanoparticles based on green chemistry perspectives impose limited hazards to the environment and are relatively biocompatible. This review is therefore focused on green methods for nanoparticle synthesis by emphasizing on microbial synthesis using bacteria, fungi, algae, and yeasts, as well as phytosynthesis using plant extracts. Furthermore, a detailed description of bioreducing and capping/stabilizing agents involved in the biosynthesis mechanism using these green sources is presented.


2012 ◽  
Vol 18 (2) ◽  
pp. 344 ◽  
Author(s):  
Qiao MA ◽  
Yuanyuan QU ◽  
Xuwang ZHANG ◽  
Bingwen XU ◽  
Jiti ZHOU

2020 ◽  
Vol 26 (18) ◽  
pp. 2167-2181
Author(s):  
Tatielle do Nascimento ◽  
Melanie Tavares ◽  
Mariana S.S.B. Monteiro ◽  
Ralph Santos-Oliveira ◽  
Adriane R. Todeschini ◽  
...  

Background: Cancer is a set of diseases formed by abnormal growth of cells leading to the formation of the tumor. The diagnosis can be made through symptoms’ evaluation or imaging tests, however, the techniques are limited and the tumor detection may be late. Thus, pharmaceutical nanotechnology has emerged to optimize the cancer diagnosis through nanostructured contrast agent’s development. Objective: This review aims to identify commercialized nanomedicines and patents for cancer diagnosis. Methods: The databases used for scientific articles research were Pubmed, Science Direct, Scielo and Lilacs. Research on companies’ websites and articles for the recognition of commercial nanomedicines was performed. The Derwent tool was applied for patent research. Results: This article aimed to research on nanosystems based on nanoparticles, dendrimers, liposomes, composites and quantum dots, associated to imaging techniques. Commercialized products based on metal and composite nanoparticles, associated with magnetic resonance and computed tomography, have been observed. The research conducted through Derwent tool displayed a small number of patents using nanotechnology for cancer diagnosis. Among these patents, the most significant number was related to the use of systems based on metal nanoparticles, composites and quantum dots. Conclusion: Although few systems are found in the market and patented, nanotechnology appears as a promising field for the development of new nanosystems in order to optimize and accelerate the cancer diagnosis.


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