Green synthesis of gold nanoparticles with willow tree bark extract: a sensitive colourimetric sensor for cysteine detection

2014 ◽  
Vol 6 (17) ◽  
pp. 6916-6924 ◽  
Author(s):  
Morteza Bahram ◽  
Esmat Mohammadzadeh
Keyword(s):  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Synthesis Method ◽  
Tree Bark ◽  
Bark Extract ◽  
Willow Tree

In this work we report an easy and simple green synthesis method for gold nanoparticles (GNPs) using willow tree bark extract.

scholarly journals Green Synthesis of Gold Nanoparticles using Adina Cordifolia Bark Extract and its Antimicrobial and in Vitro Anticancer Study

2019 ◽  
pp. 143-152
Author(s):  
Shaileshkumar C Kotval
Keyword(s):  
Gold Nanoparticles ◽  
Antibacterial Activity ◽  
Green Synthesis ◽  
Anticancer Activity ◽  
Cancer Cell Line ◽  
Medical Application ◽  
Positive Control ◽  
Bark Extract ◽  
Uv Visible

In this study, green synthesis of gold nanoparticles were success fully synthesised by using <em>Adina cordifolia</em> plant bark aqueous extract which provides eco-friendly process, an environmentally benign, easy and proficient way for the synthesis of gold nanoparticles. The smaller size of gold nanoparticles have research on various dieses are very important. The green synthesized gold nanoparticles were characterized by UV-Visible spectroscopy, FT-IR, XRD, SEM, TEM and their antimicrobial activity was investigated. From UV-Visible spectrophotometer result was confirmed the formation of gold nanoparticles by color changed to ruby red color from pale yellow color indicates the reduction of Au<sup>3+</sup> ions to Au<sup>o</sup>. The antibacterial activity for the synthesized gold nanoparticles was confirmed by the antibacterial activity experiment against <em>Bacillus subtilis </em>and <em>Escherichia coli</em> by agar well method. The synthesized AuNPs was performed anticancer activity against MCF-7 breast cancer cell line. Compared to Adriamycin, Positive Control Compound AuNPs exhibited potent anticancer activity with the IC<sub>50</sub>. The green synthesized gold nanoparticles proved to be potential candidates for medical application antimicrobial and anticancer activity is highly essential.

scholarly journals Green synthesis of gold nanoparticles and its diverse applications in various fields

2018 ◽  
Vol 6 (11) ◽  
pp. 1720
Author(s):  
Shiva Shirotiya ◽  
Bhanumati Singh ◽  
Chauhan V.S.
Keyword(s):  
Drug Delivery ◽  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Technology Use ◽  
Biomedical Application ◽  
Synthesis Method ◽  
Methods Of Synthesis ◽  
Different Shapes ◽  
Great Surface ◽  
Great Surface Area

Nanobiotechnology is a growing field due to its wide variety of applications in many fields of science and technology. Use of Nanoparticles in biomedical and biotechnology is due to its great surface area, improved permeability, retention effect etc. Green synthesized gold nanoparticles are very much useful for different applications in nanobiotechnology because of its properties and ecofriendly nature. Because of its chemical and physical properties, Colloidal gold has different uses in biotechnology. There are many ways to synthesize gold nanoparticles but green synthesis method is more appropriate as compared to others. This review addressed basically on the different methods of synthesis of gold nanoparticles but is also focused on its green synthesis, different shapes, sizes and various applications in each and every field of life. To be concise, AuNPs are potent tool in targeting drug delivery and biomedical application.

scholarly journals Synthesis of Gold Nanoparticles Using Mimosa tenuiflora Extract, Assessments of Cytotoxicity, Cellular Uptake, and Catalysis

2019 ◽  
Vol 14 (1) ◽  
Author(s):  
Ericka Rodríguez-León ◽  
Blanca E. Rodríguez-Vázquez ◽  
Aarón Martínez-Higuera ◽  
César Rodríguez-Beas ◽  
Eduardo Larios-Rodríguez ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Laser Scanning ◽  
Nuclear Periphery ◽  
Laser Scanning Microscopy ◽  
Tree Bark ◽  
Bark Extract ◽  
Confocal Laser ◽  
Dependent Manner ◽  
X Ray ◽  
Mimosa Tenuiflora

Abstract Synthesis of gold nanoparticles (AuNPs) with plant extracts has gained great interest in the field of biomedicine due to its wide variety of health applications. In the present work, AuNPs were synthesized with Mimosa tenuiflora (Mt) bark extract at different metallic precursor concentrations. Mt extract was obtained by mixing the tree bark in ethanol-water. The antioxidant capacity of extract was evaluated using 2,2-diphenyl-1-picrylhydrazyl and total polyphenol assay. AuNPs were characterized by transmission electron microscopy, X-ray diffraction, UV-Vis and Fourier transform infrared spectroscopy, and X-ray photoelectron spectrometry for functional group determination onto their surface. AuMt (colloids formed by AuNPs and molecules of Mt) exhibit multiple shapes with sizes between 20 and 200 nm. AuMt were tested on methylene blue degradation in homogeneous catalysis adding sodium borohydride. The smallest NPs (AuMt1) have a degradation coefficient of 0.008/s and reach 50% degradation in 190s. Cell viability and cytotoxicity were evaluated in human umbilical vein endothelial cells (HUVEC), and a moderate cytotoxic effect at 24 and 48 h was found. However, toxicity does not behave in a dose-dependent manner. Cellular internalization of AuMt on HUVEC cells was analyzed by confocal laser scanning microscopy. For AuMt1, it can be observed that the material is dispersed into the cytoplasm, while in AuMt2, the material is concentrated in the nuclear periphery.

Green synthesis of gold nanoparticles using quail egg yolk and investigation of potential application areas

2017 ◽  
Vol 6 (1) ◽  
Author(s):  
Hayrunnisa Nadaroglu ◽  
Selvi Ince ◽  
Azize Alayli Gungor
Keyword(s):  
Gold Nanoparticles ◽  
Green Synthesis ◽  
High Pressures ◽  
Synthesis Method ◽  
Nanoparticle Synthesis ◽  
Egg Yolk ◽  
Morphological Properties ◽  
Scientific Development ◽  
Physical Methods ◽  
Egg Yolks

AbstractNanotechnology is a growing area of research. For example, gold nanoparticles have a wide variety of applications, including optical, electronic, and medical; they are also used as catalysts in biosensor applications and can be used for scanning, carrier, heat source, and sensors. Therefore, nanoparticle synthesis is of great importance to the country’s economy and to scientific development. Nanoparticle synthesis involves using chemical methods, physical methods, or both chemical and physical methods. The synthesis is performed at high pressures or high temperatures and severe conditions, both of which have a high cost in terms of energy. In our investigation, we used a green synthesis method, which used quail eggs that required more moderate conditions and less energy. The yolk from quail eggs has a high protein and vitamin content. Using quail egg yolks, the reaction conditions were optimized in terms of pH, temperature, and concentration. The morphological properties of the obtained gold nanoparticles were characterized using an ultraviolet-visible spectrophotometer, a scanning electron microscope, and an X-ray diffraction analysis.

Facile Synthesis of Gold (Au) Nanoparticles Using Cassia auriculata Flower Extract

2013 ◽  
Vol 678 ◽  
pp. 12-16 ◽  
Author(s):  
J. Dhayananthaprabhu ◽  
R. Lakshmi Narayanan ◽  
K. Thiyagarajan
Keyword(s):  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Large Scale ◽  
Synthesis Method ◽  
Cost Effective ◽  
Scale Production ◽  
Flower Extract ◽  
Cassia Auriculata ◽  
Large Scale Production ◽  
Versatile Tool

The green synthesis is the versatile tool to produce the nano scale materials. The present study deals with the synthesis of gold nanoparticles using the Cassia auriculata flower extract. The complete reduction of gold ions was observed after 45 min of reaction under stirrer condition. The colour changes in reaction mixture (dark red colour) was observed during the reaction period because of the formation of gold nanoparticles in the reaction mixture enables to produce particular colour due to their specific properties (Surface Plasmon Resonance). The formation of gold nanoparticles was confirmed using UV visible spectroscopy, the size of the nanoparticles measured by using particle size analyzer. The morphology of the poly dispersed gold nanoparticles was studied using TEM, This green synthesis method is cost effective; and eco friendly technique to produce large scale production of Nanomaterials

scholarly journals Effect of Physical Parameters on Green Synthesis of Gold Nanoparticles using Zea Mays Extract

2019 ◽  
Vol 9 (2) ◽  
pp. 870-873
Keyword(s):  
Gold Nanoparticles ◽  
Zea Mays ◽  
Reaction Time ◽  
Green Synthesis ◽  
Synthesis Method ◽  
Physical Parameters ◽  
Concentration Effects ◽  
Stabilizing Solution ◽  
Transmission Electron ◽  
Uv Visible

Gold nanoparticles (AuNPs) were produced by green synthesis method by utilization of Zea Mays Extract as the reducing and stabilizing solution. Selected parameters like Time, Temperature, pH, Light and Concentration effects on the preparation of gold nanoparticles was analyzed by UV- Visible Spectroscopy (UV-Vis.). The size was measured through Dynamic Light Scattering (DLS) and also confirmed by Transmission electron microscopy (TEM) techniques, it is also observed that all the reaction time, Temperature, Concentration and reaction time are very essential parameters which should be noticed with high precession during the synthesis of Gold nanoparticles.

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