Green synthesis and stabilization of earthworm-like gold nanostructure and quasi-spherical shape using Caesalpinia sappan Linn. extract

nano Online ◽  
2018 ◽  
Author(s):  
Widsanusan Chartarrayawadee ◽  
Chee O. Too ◽  
Sukunya Ross ◽  
Gareth M. Ross ◽  
Kanlaya Jumpatong ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Spherical Shape ◽  
Caesalpinia Sappan ◽  
Gold Nanostructure

scholarly journals Green synthesis and stabilization of earthworm-like gold nanostructure and quasi-spherical shape using Caesalpinia sappan Linn. extract

2018 ◽  
Vol 7 (5) ◽  
pp. 424-432 ◽  
Author(s):  
Widsanusan Chartarrayawadee ◽  
Chee O. Too ◽  
Sukunya Ross ◽  
Gareth M. Ross ◽  
Kanlaya Jumpatong ◽  
...  
Keyword(s):  
Zeta Potential ◽  
Green Synthesis ◽  
Spherical Shape ◽  
Colloidal Solutions ◽  
Tem Analysis ◽  
Caesalpinia Sappan ◽  
Synthesis Of Nanoparticles ◽  
Stabilizing Agents ◽  
Transmission Electron ◽  
The Stability

AbstractGreen synthesis of nanoparticles (NPs) has received much attention due to biocompatibility and being facile and eco-friendly.Caesalpinia sappanLinn. (CS) is a plant found in Southeast Asia and is commonly known as sappan wood. In this research, we are the first to successfully use CS extract as reducing and stabilizing agents for the green synthesis of gold NPs (AuNPs). Colloidal solutions of AuNPs after reduction show natural red-wine and dark purple color depending on the size of AuNPs, without the interference of the orange/reddish-orange color from the CS extract. The concentration of CS was investigated for the formation and stabilization of AuNPs in colloidal solution (i.e. morphology, size and zeta potential). It was found that the optimized concentration of the reducing agent for the green synthesis of AuNPs was in the range of 0.004–0.04 wt% of CS. As the concentration of CS was increased, the sizes of AuNPs decreased due to the adsorption and stabilizing effect of CS. Transmission electron microscopy (TEM) analysis showed differences in size and shape of the NPs with earthworm and quasi-spherical characteristics. The zeta potential of AuNPs synthesized in the presence of CS was approximately in the range of −10 mV to −20 mV, indicating the stability of AuNPs synthesized by CS.

scholarly journals Microwave-assisted green synthesis of silver nanoparticles using dried extracts of Chlorella vulgaris and antibacterial activity studies

2020 ◽  
Vol 9 (1) ◽  
pp. 283-293
Author(s):  
Milad Torabfam ◽  
Meral Yüce
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Chlorella Vulgaris ◽  
Metallic Nanoparticles ◽  
Nitrate Solution ◽  
Spherical Shape ◽  
Silver Nitrate Solution ◽  
Spectroscopy Analysis ◽  
Bacterial Diseases ◽  
Serovar Typhimurium

AbstractGreen synthesis of metallic nanoparticles (NPs) is acquiring considerable attention due to its environmental and economic superiorities over other methods. This study describes the practical synthesis of silver nanoparticles (AgNPs) through the reduction of silver nitrate solution using an algal source, Chlorella vulgaris, as the reducing as well as the stabilizing agent. The energy required for this synthesis was supplied by microwave radiation. The ultraviolet-visible spectroscopy exhibited a single peak related to the surface plasmon absorbance of AgNPs at 431 nm. The AgNPs with high stability (a zeta potential of −17 mV), hydrodynamic size distribution of 1–50 nm, and mostly spherical shape were obtained through a 10 min process. Fourier transform infrared spectroscopy analysis revealed that several functional groups, including carbonyl groups of C. vulgaris, play a significant role in the formation of functional NPs. Antibacterial features of the produced AgNPs were verified against those of Salmonella enterica subsp. enterica serovar typhimurium and Staphylococcus aureus, demonstrating a considerable growth inhibition at increasing concentrations of the NPs. As a result, the formed AgNPs can be used as a promising agent against bacterial diseases.

scholarly journals Phytosynthesis of Titanium Dioxide Nanoparticles Using King of Bitter Andrographis paniculata and Its Embryonic Toxicology Evaluation and Biomedical Potential

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
S. Rajeshkumar ◽  
J. Santhoshkumar ◽  
Leta Tesfaye Jule ◽  
Krishnaraj Ramaswamy
Keyword(s):  
Titanium Dioxide ◽  
Green Synthesis ◽  
Tio2 Nanoparticles ◽  
Titanium Dioxide Nanoparticles ◽  
Spherical Shape ◽  
Andrographis Paniculata ◽  
Potential Hazard ◽  
Average Size ◽  
Herbal Plant ◽  
Biomedical Potential

Phytosynthesis particles are the efficient activity of biomedical and environmental. In this present study, the green synthesis of titanium dioxide (TiO2) nanoparticles using the king of bitter herbal plant Andrographis paniculata was synthesized and characterized using XRD, SEM, HRTEM, AFM, and antimicrobial, antioxidant, and antidiabetic activities. The size of the particles HRTEM shows 50 nm, and SEM shows the spherical shape, which reveals the synthesis of TiO2 nanoparticles. XRD spectrum shows crystallinity of nanoparticles, and an average size is calculated about 22.97 nm. The phytosynthesis TiO2 shows the antioxidant and antidiabetic activities. Similarly, toxicity studies have demonstrated the hatching and viability LD 50 value of TiO2 250 μg/L. The current study’s findings suggested that phytosynthesis TiO2 using extract of Andrographis paniculata exposure to potential hazard factors to biomedical and environmental uses.

scholarly journals A new strategy for the green synthesis of chondroitin sulfate-reduced gold nanoparticles; in vitro evaluation of synthesized nanoparticles

Bioimpacts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 217-226
Author(s):  
Maryam Asariha ◽  
Azam Chahardoli ◽  
Farshad Qalekhani ◽  
Mahnaz Ghowsi ◽  
Mehdi Fouladi ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Antibacterial Activity ◽  
Green Synthesis ◽  
Chondroitin Sulfate ◽  
Blood Compatibility ◽  
Spherical Shape ◽  
Hemolysis Assay ◽  
Wide Range ◽  
New Strategy

introduction: The application of gold nanoparticles (GNPs) in medicine is expanding as an effective therapeutic and diagnostic compound. Different polysaccharides with high biocompatibility and hydrophilic properties have been used for synthesis and capping of GNPs. Chondroitin sulfate (CHS) as a polysaccharide possesses a wide range of biological functions e.g. anti-oxidant, anti-inflammation, anti-coagulation, anti-atherosclerosis, anti-thrombosis with insignificant immunogenicity and has not been used for the green synthesis of GNPs. Methods: GNPs were synthesized using CHS, and their physicochemical properties were evaluated. The antibacterial activity of CHS-GNPs was estimated against both gram-positive and gram-negative bacteria. The cytotoxicity of CHS and CHS-GNPs was obtained by MTT (3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide) test, and the electrocatalytic activity of CHS-GNPs was investigated. The blood compatibility was evaluated by the in vitro hemolysis assay. Results: The absorption band at 527 nm reveals the reduction of Au3+ into GNPs. The transmission electron microscopy (TEM) image displays the spherical shape of GNPs in the range of 5.8–31.4 nm. The CHS and CHS-GNPs at 300 µg/mL revealed a maximum DPPH (1, 1-diphenyl-2-picrylhydrazyl) scavenging activity of 73% and 65%, respectively. CHS-GNPs showed antibacterial activity against Bacillus subtilis, while CHS has no antibacterial activity. CHS-GNPs exhibited a cytotoxicity effect against MDA-MB-468 and βTC3 cancer cell lines, and the electrochemical study indicated a significant increase in electrocatalytic properties of CHS-GNPs coated electrode compared by the bare electrode. The hemolysis test proved the blood compatibility of CHS-GNPs. Conclusion: The results indicate the advantages of using CHS to produce blood-compatible GNPs with antioxidant, cytotoxic, and electrochemical properties.

scholarly journals Synthesis of potassium doped ferric sulphide nanoparticles using bio-assisted method for agricultural applications

2020 ◽  
Vol 7 (2) ◽  
pp. 22-25
Author(s):  
Balaganesh A S ◽  
Pavithra N ◽  
Ranjith Kumar R ◽  
Dinesh K.P.B ◽  
Chandar Shekar B
Keyword(s):  
Plant Growth ◽  
Green Synthesis ◽  
Growth Analysis ◽  
Spherical Shape ◽  
High Yield ◽  
Growth Promoter ◽  
Plant Growth Promoter ◽  
Agricultural Applications ◽  
Xrd Studies ◽  
Agglomeration Of Nanoparticles

Potassium (K) doped ferric sulphide nanoparticles were prepared by a simple green synthesis (Bio-Assisted) method. Structural (XRD) studies confirm the formation of K-doped Ferric sulphide nanoparticles. The FESEM images show the agglomeration of nanoparticles that are mostly sponge like structure and spherical shape. The plant growth analysis revealed that potassium doped ferric sulphide nanoparticle could be used as plant growth promoter for high yield in agriculture.

Effect of pH on the Green Synthesis of Silver Nanoparticles through Reduction with Pistiastratiotes L. Extract

2015 ◽  
Vol 1131 ◽  
pp. 223-226 ◽  
Author(s):  
Pranlekha Traiwatcharanon ◽  
Kriengkri Timsorn ◽  
Chatchawal Wongchoosuk
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Spherical Shape ◽  
Silver Ions ◽  
Basic Medium ◽  
Metallic Silver ◽  
Visible Spectroscopy ◽  
Ag Nps ◽  
Transmission Electron ◽  
Effects Of Ph

In this work, we have presented the green synthesis of silver nanoparticles (Ag-NPs) using extracts of Pistiastratiotes L. as reducing agent. The silver nitrate (AgNO3) solutions were used as precursor. The experiments were performed under irradiation with a light that can help to increase the activation for reduction of silver ions (Ag+) to metallic silver (Ag0). The effects of pH on the nature of Ag-NPs have been systematically studied by using ultraviolet-visible spectroscopy (UV-Vis) and transmission electron microscopy (TEM). The results show that the synthesis of Ag-NPs in acidic medium gives smaller size than that in basic medium. A number of synthesized Ag-NPs increase with increasing the concentrations of acidic/basic medium. All synthesized Ag-NPs have spherical shape.

scholarly journals GREEN SYNTHESIS NANOPARTIKEL PERAK MENGGUNAKAN EKSTRAK DAUN PUCUK IDAT (Cratoxylum glaucum) SEBAGAI BIOREDUKTOR

2018 ◽  
Vol 1 (2) ◽  
pp. 68
Author(s):  
Verry Andre Fabiani ◽  
Febry Sutanti ◽  
Desti Silvia ◽  
Megawati Ayu Putri
Keyword(s):  
Silver Nanoparticles ◽  
Reaction Time ◽  
Green Synthesis ◽  
Silver Nanoparticle ◽  
Average Particle Size ◽  
Water Extract ◽  
Spherical Shape ◽  
Average Particle ◽  
Sem Image ◽  
Uv Visible

An environment friendly technique for green synthesis of silver nanoparticles has been reported. Silver nanoparticle have been synthesized using water extract of leaves of pucuk idat (Cratoxylum glaucum), commonly known as local Bangka plant. The flavonoid and tannin present in the extract act as reducing agent. AgNO3 0,05 M solution was reducing using the extract at room temperature by stirring. Color changing of the solution was detected at 30 minutes reaction time. The color tends to be darker by the increasing of reaction time. Various techniques used to characterize synthesized nanoparticles are UV-Visible spectrophotometer, x-ray diffraction (XRD) and scanning electron microscopy (SEM). UV-Visible spectrophotometer showed absorbance peak in 405 nm, the XRD shows that silver nanoparticles formed are crystalline. The average particle size of Ag nanoparticles estimated from the Scherrer formula is 35,59 nm, while SEM image shows shape of silver nanoparticle is random and some spherical shape.

scholarly journals Green Synthesis of Silver Nanoparticles Using Terminalia Bellirica Leaves Extract

2021 ◽  
Vol 16 (2) ◽  
Author(s):  
Rashmi Rawat ◽  
M. C. Purohit ◽  
Mahender Singh ◽  
Ankit S. Bartwal
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Ag Nanoparticles ◽  
Metallic Nanoparticles ◽  
Skin Diseases ◽  
Average Particle Size ◽  
Spherical Shape ◽  
Average Particle ◽  
Tem Analysis ◽  
Terminalia Bellirica

Nowadays, for green synthesis, different parts of plant extracts are being used for the synthesis of metallic nanoparticles. Green routes for the synthesis of metallic nanoparticles are most favorable method over conventional methods. In this study, we have synthesized Ag nanoparticles from Terminalia bellirica aqueous leaves extract with AgNO3 solution. Recently, silver nanoparticles are being used for their beneficial effects on human health. It has been reported that it helps in lowering in cholesterol, blood pressure, thirst, pile, skin diseases and treatment of diabetes. Ag nanoparticles were characterized by UV-Vis spectrophotometer, XRD, TEM and FTIR techniques. It was found that Ag+ ion reduced into Ag0 and showed absorption band at 447 nm. X-Ray Diffraction for structural determination confirms the crystalline Ag nanoparticles. TEM analysis confirms the average particle size is less than 30 nm with spherical shape. FTIR spectra confirms the presence of active biomolecules (alcohols, phenols, proteins and nitro compounds) of plant leaves extract which played a key role in formation of Ag nanoparticles.

scholarly journals Gold nanoparticles from Celastrus hindsii and HAuCl4: Green synthesis, characteristics, and their cytotoxic effects on HeLa cells

2021 ◽  
Vol 10 (1) ◽  
pp. 73-84
Author(s):  
Xuan-Truong Mai ◽  
Minh-Chien Tran ◽  
Anh-Quan Hoang ◽  
Phuc Dang-Ngoc Nguyen ◽  
Thi-Hiep Nguyen ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Green Synthesis ◽  
Hela Cells ◽  
Particle Diameter ◽  
Spherical Shape ◽  
Natural Antioxidants ◽  
Cytotoxic Effects ◽  
Au Nps ◽  
Transmission Electron ◽  
Dose Dependent

Abstract The extract from Celastrus hindsii (C. hindsii), a plant that naturally grows in the forests of several provinces of Vietnam, has been traditionally used as an alternative medicine for the treatment of inflammation because of its anticancer and antitumor properties. This study reported the green synthesis of stable gold nanoparticles (Au-NPs) derived from HAuCl4 using the extract of C. hindsii as reducing and capping agents. Their particle size could be controlled by adjusting the ratio of the extract to HAuCl4 solution used (1.25%, 2.5%, 3.75%, 5.0%, and 6.25%). The optimal ratio of the extract was 3.75% (Au-NPs-3.75%). The X-ray powder diffraction analysis demonstrated that the Au-NPs was successfully synthesized. Fourier-transform infrared spectroscopy result indicated the possible presence of phenolic acids and flavonoids (acting as reducing agents and potential natural antioxidants). Transmission electron microscopy images showed that the particle diameter of Au-NPs-3.75% varied between 13 and 53 nm (average: ∼30 nm) in its spherical shape. The biosynthesized Au-NPs-3.75% exhibited dose-dependent cytotoxicity against HeLa cells, and the inhibitory concentration (IC50) was 12.5 µg/mL at 48 h. Therefore, Au-NPs that were synthesized from environmentally friendly method without the presence of potentially toxic chemicals were highly possible in biomedical applications.

scholarly journals Green Synthesis of Silver Nanoparticles Using Flower Extract of Hemigraphis colorata as Reducing Agent and its Biological Activity

2021 ◽  
Vol 10 (4) ◽  
pp. 2646-2654
Keyword(s):  
Silver Nanoparticles ◽  
Electron Microscope ◽  
Green Synthesis ◽  
Visible Spectrum ◽  
Spherical Shape ◽  
Ag Nps ◽  
Surface Plasma Resonance ◽  
Flower Extract ◽  
Uv Visible ◽  
Average Size

Green synthesis of silver nanoparticles (Ag NPs) was performed using flower extract of Hemigraphis colorata (H. Colorata). Synthesized nanoparticles were characterized by UV-Visible Spectrophotometer (UV-Vis), Fourier Transform Infrared (FT-IR), Scanning Electron Microscope (SEM), and Transmission Electron Microscope (TEM-SAED). , The crystalline nature of the sample was examined by an X-ray diffraction study (XRD). The UV-Visible spectrum showed surface plasma resonance (SPR) at 360 nm revealed the formation of nanoparticles, SEM and TEM exhibited spherical shape particles with an average size between 10-20 nm. The valuation of the antibacterial and antifungal study revealed its efficiency in killing bacteria and fungi.

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