Biosynthesis and Characterization of Gold Nanoparticles and Their Interaction Study With Metformin

Abstract

<jats:p>BIOSYNTHESIS AND CHARACTERIZATION OF GOLD NANOPARTICLES AND THEIR INTERACTION STUDY WITH METFORMIN. Synthesis of gold nanoparticles successfully carried using Imperata cylindrica L leaf extract. In this study, the approach used through green synthesis method is a reaction betwen of the HAuCl4 solution (concentration variation as 3; 5; 7 x 10-4 M) with Imperata cylindrica L leaf extract. Results of UV-Vis showed of gold nanoparticles has a maximum wavelength at 530 nm with absorbance value of 1.4. Results of FTIR shows a shift the absorption peak at wavenumber of 3392 cm-1 to 3404 cm-1. PSA and PZC showed the distribution of gold nanoparticles was 48.84 nm with a charge of 20.5 mV. Gold nanoparticles has a spherical shape and an average particle size of 20 nm which can be seen from the results of the characterization using TEM. XRD showed crystalize size average of gold nanoparticles as 20.47 nm. The interaction between of gold nanoparticles with metformin can be seen in the absorbance decrease of 0.38 at a wavelength of 531 nm and the results of PSA shows an average particle size of AuNPs@metformin is 122 nm. From the characterization data can be concluded the gold nanoparticles were successfully synthesized using natural bioreductors by utilizing secondary metabolites from Imperata cylindrica L leaf extract.</jats:p>

SODIUM LAURETH SULFATE (SLS) DECORATED α-PbO NANOCRYSTALS: OPTICAL, STRUCTURE, AND MORPHOLOGY, PROPERTIES

“…α-PbO nanocrystals has a 2 peaks with a particle size of 45 nm (peak 1) and 98 nm (peak 2). The particle size average distribution of α-PbO nanocrystals is 71.5 nm with a poly dispersity index (PDI) value of 0.3 as shown Figure 6(a) [18][19][20]. The results of PSA measurement showed α-PbO nanocrystals had a larger of particle size than the XRD results.…”

Characterization of Gold Nanoparticles From Clove Flower Water Extract and Its Antioxidant Activity

“…in AuNP, a change in color was observed from yellow to cherry red and in some cases light to purple, depending on the shape and size of the nanoparticles. Phenomena of surface plasmon resonance on gold nanoparticles occur in visible light (500-600 nm wavelength) [28][29][30]. In Figure 4, it can be seen that the secondary metabolite components of plant extracts are responsible for reducing metal salts which will later lead to the growth and stability of gold nanoparticles [31][32][33].…”