Dual Enlargement of Gold Nanoparticles: From Mechanism to Scanometric Detection of Pathogenic Bacteria

Small ◽  
2011 ◽  
Vol 7 (12) ◽  
pp. 1701-1708 ◽  
Author(s):  
Cuong Cao ◽  
Lionel Cervera Gontard ◽  
Le Ly Thuy Tram ◽  
Anders Wolff ◽  
Dang Duong Bang
Keyword(s):  
Gold Nanoparticles ◽  
Pathogenic Bacteria

scholarly journals Selective point-of-care detection of pathogenic bacteria using sialic acid functionalized gold nanoparticles

Talanta ◽  
2021 ◽  
pp. 122644
Author(s):  
Guillermo Landa ◽  
Laura G. Miranda-Calderón ◽  
Victor Sebastian ◽  
Silvia Irusta ◽  
Gracia Mendoza ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Sialic Acid ◽  
Pathogenic Bacteria ◽  
Point Of Care ◽  
Functionalized Gold Nanoparticles ◽  
Point Of Care Detection

scholarly journals Controlled Synthesis of Gold Nanoparticles UsingAspergillus terreusIF0 and Its Antibacterial Potential against Gram Negative Pathogenic Bacteria

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Eepsita Priyadarshini ◽  
Nilotpala Pradhan ◽  
Lala B. Sukla ◽  
Prasanna K. Panda
Keyword(s):  
Gold Nanoparticles ◽  
Pathogenic Bacteria ◽  
Particle Diameter ◽  
Weight Fraction ◽  
Xrd Analysis ◽  
Controlled Synthesis ◽  
Chloroauric Acid ◽  
Gram Negative ◽  
Fungal Extract ◽  
Vis Spectroscopy

Biosynthesis of monodispersed nanoparticles, along with determination of potential responsible biomolecules, is the major bottleneck in the area of bionanotechnology research. The present study focuses on an ecofriendly, ambient temperature protocol for size controlled synthesis of gold nanoparticles, using the fungusAspergillus terreusIF0. Gold nanoparticles were formed immediately, with the addition of chloroauric acid to the aqueous fungal extract. Synthesized nanoparticles were characterized by UV-Vis spectroscopy, TEM-EDX, and XRD analysis. Particle diameter and dispersity of nanoparticles were controlled by varying the pH of the fungal extract. At pH 10, the average size of the synthesized particles was in the range of 10–19 nm. Dialysis to obtain high and low molecular weight fraction followed by FTIR analysis revealed that biomolecules larger than 12 kDa and having –CH, –NH, and –SH functional groups were responsible for bioreduction and stabilization. In addition, the synthesized gold nanoparticles were found to be selectively bactericidal against the pathogenic gram negative bacteria,Escherichia coli.

Visual and sensitive detection of viable pathogenic bacteria by sensing of RNA markers in gold nanoparticles based paper platform

2014 ◽  
Vol 62 ◽  
pp. 38-46 ◽  
Author(s):  
Hongxing Liu ◽  
Fangfang Zhan ◽  
Fang Liu ◽  
Minjun Zhu ◽  
Xiaoming Zhou ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Pathogenic Bacteria ◽  
Sensitive Detection

Construction of nanoantennas on the bacterial outer membrane

2014 ◽  
Vol 50 (47) ◽  
pp. 6252-6255 ◽  
Author(s):  
Hiroshi Shiigi ◽  
Maho Fukuda ◽  
Takatoshi Tono ◽  
Kaori Takada ◽  
Tomoyuki Okada ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Outer Membrane ◽  
Pathogenic Bacteria ◽  
Sensitive Detection ◽  
Optical Antenna ◽  
Highly Sensitive ◽  
Bacterial Outer Membrane ◽  
Highly Sensitive Detection

A simple and highly sensitive detection of pathogenic bacteria is achieved by utilizing gold nanoparticles as an optical antenna.

Functionalised gold nanoparticles for controlling pathogenic bacteria

2010 ◽  
Vol 28 (4) ◽  
pp. 207-213 ◽  
Author(s):  
Dakrong Pissuwan ◽  
Colin H. Cortie ◽  
Stella M. Valenzuela ◽  
Michael B. Cortie
Keyword(s):  
Gold Nanoparticles ◽  
Pathogenic Bacteria

scholarly journals Antibacterial Effect of Chitosan–Gold Nanoparticles and Computational Modeling of the Interaction between Chitosan and a Lipid Bilayer Model

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2340
Author(s):  
M. G. Fuster ◽  
M. G. Montalbán ◽  
G. Carissimi ◽  
B. Lima ◽  
G. E. Feresin ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Simulation Model ◽  
Pathogenic Bacteria ◽  
Antibacterial Effect ◽  
Resistance Mechanisms ◽  
Target Point ◽  
Systematic Analysis ◽  
Bacterial Membranes ◽  
Synthesis Parameters ◽  
Cell Wall Disruption

Pathogenic bacteria have the ability to develop antibiotic resistance mechanisms. Their action consists mainly in the production of bacterial enzymes that inactivate antibiotics or the appearance of modifications that prevent the arrival of the drug at the target point or the alteration of the target point itself, becoming a growing problem for health systems. Chitosan–gold nanoparticles (Cs-AuNPs) have been shown as effective bactericidal materials avoiding damage to human cells. In this work, Cs-AuNPs were synthesized using chitosan as the reducing agent, and a systematic analysis of the influence of the synthesis parameters on the size and zeta potential of the Cs-AuNPs and their UV-vis spectra was carried out. We used a simulation model to characterize the interaction of chitosan with bacterial membranes, using a symmetric charged bilayer and two different chitosan models with different degrees of the chitosan amine protonation as a function of pH, with the aim to elucidate the antibacterial mechanism involving the cell wall disruption. The Cs-AuNP antibacterial activity was evaluated to check the simulation model.

Biological approach in nanobiotechnology – screening of four food pathogenic bacteria extract ability in extracellular biosynthesis of gold nanoparticles

Biologia ◽  
2019 ◽  
Vol 75 (4) ◽  
pp. 619-625 ◽  
Author(s):  
Amir Rahimirad ◽  
Afshin Javadi ◽  
Hamid Mirzaei ◽  
Navideh Anarjan ◽  
Hoda Jafarizadeh-Malmiri
Keyword(s):  
Gold Nanoparticles ◽  
Pathogenic Bacteria ◽  
Biological Approach ◽  
Extracellular Biosynthesis

Biogenic Synthesis of Gold Nanoparticles and Their Antimicrobial Activities

2020 ◽  
pp. 216-233
Author(s):  
Snežana Radisavljević ◽  
Biljana Petrović
Keyword(s):  
Drug Delivery ◽  
Gold Nanoparticles ◽  
Antibacterial Activity ◽  
Biomedical Applications ◽  
Food Packaging ◽  
Pathogenic Bacteria ◽  
Antimicrobial Agents ◽  
Bactericidal Effect ◽  
Antimicrobial Activities ◽  
Physiochemical Properties

Gold nanoparticles (AuNPs) are widely used in biomedical applications, especially diagnostic and drug delivery. The antibacterial activity of nanoparticles depends on the dimensions of the particles. AuNPs may associate with the surface of the cell membrane and cause disorder such as respiration and permeability. The method of binding of particles for bacteria depends on their surface available for interaction. Smaller particles which have the larger surface area available for interaction will show better bactericidal effect than the larger particles. Useful antibacterial agents should also be toxic to various pathogenic bacteria with the ability to coat different surfaces like biomaterials, devices, textiles, food packaging, and so on. The biological and physiochemical properties of synthesized AuNPs have impact on the use of gold nanoparticles like antimicrobial agents, especially for water purification, as well as other biomedical applications.

Sign in / Sign up

Export Citation Format

Share Document