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Analysis of the evolution of tannic Acid stabilized gold nanoparticles using mie theory.

Senoudi AR, Chabane Sari SM, Hakem IF - Int J Anal Chem (2014)

Bottom Line: Spherical gold nanoparticles (GNPs) have been synthesized in aqueous solutions using sodium citrate (SC) and tannic acid (TA) as reducing and stabilizing agents.Upon addition of TA and compared to the GNP TA-free aqueous solutions, a reduction of the GNPs size and consequently a dramatic change of their optical properties have been observed and quantitatively analyzed using Mie theory.The variations of the peak absorbance with the TA concentration are examined in the low and high concentration regimes.

View Article: PubMed Central - PubMed

Affiliation: Physics Department, University of Abou Bekr Belkaid, 13000 Tlemcen, Algeria.

ABSTRACT
Spherical gold nanoparticles (GNPs) have been synthesized in aqueous solutions using sodium citrate (SC) and tannic acid (TA) as reducing and stabilizing agents. Upon addition of TA and compared to the GNP TA-free aqueous solutions, a reduction of the GNPs size and consequently a dramatic change of their optical properties have been observed and quantitatively analyzed using Mie theory. An increase in the concentration of TA reveals a modification of the colloidal solution refractive index that is evidenced by the shift in the peak position of the localized surface plasmon resonance (LSPR) band. The variations of the peak absorbance with the TA concentration are examined in the low and high concentration regimes.

No MeSH data available.


Related in: MedlinePlus

Transmission electron micrograph (TEM) of gold colloids g2, g3, and g4 synthesized in the presence of added TA with concentrations of 5.9 × 10−7, 5.9 × 10−6, and 4.1 × 10−5 mol, respectively.
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fig2: Transmission electron micrograph (TEM) of gold colloids g2, g3, and g4 synthesized in the presence of added TA with concentrations of 5.9 × 10−7, 5.9 × 10−6, and 4.1 × 10−5 mol, respectively.

Mentions: The effect of synthetic conditions on the particle diameter was determined by both dynamic light scattering (DLS) and transmission electron microscopy (TEM). DLS analysis (performed using a MALVERN Zetasizer) yielded an average hydrodynamic diameter of gold particles equal to 26.6 nm (g1), 21.1 nm (g2), 7.8 nm (g3), and 4.2 nm (g4), respectively. These results are in excellent agreement with results obtained by electron imaging. For example, Figure 2 depicts representative bright field TEM micrographs of particle samples g2–g4 revealing both the particle size in agreement with DLS results and the crystalline nature of the particle systems.


Analysis of the evolution of tannic Acid stabilized gold nanoparticles using mie theory.

Senoudi AR, Chabane Sari SM, Hakem IF - Int J Anal Chem (2014)

Transmission electron micrograph (TEM) of gold colloids g2, g3, and g4 synthesized in the presence of added TA with concentrations of 5.9 × 10−7, 5.9 × 10−6, and 4.1 × 10−5 mol, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4265386&req=5

fig2: Transmission electron micrograph (TEM) of gold colloids g2, g3, and g4 synthesized in the presence of added TA with concentrations of 5.9 × 10−7, 5.9 × 10−6, and 4.1 × 10−5 mol, respectively.
Mentions: The effect of synthetic conditions on the particle diameter was determined by both dynamic light scattering (DLS) and transmission electron microscopy (TEM). DLS analysis (performed using a MALVERN Zetasizer) yielded an average hydrodynamic diameter of gold particles equal to 26.6 nm (g1), 21.1 nm (g2), 7.8 nm (g3), and 4.2 nm (g4), respectively. These results are in excellent agreement with results obtained by electron imaging. For example, Figure 2 depicts representative bright field TEM micrographs of particle samples g2–g4 revealing both the particle size in agreement with DLS results and the crystalline nature of the particle systems.

Bottom Line: Spherical gold nanoparticles (GNPs) have been synthesized in aqueous solutions using sodium citrate (SC) and tannic acid (TA) as reducing and stabilizing agents.Upon addition of TA and compared to the GNP TA-free aqueous solutions, a reduction of the GNPs size and consequently a dramatic change of their optical properties have been observed and quantitatively analyzed using Mie theory.The variations of the peak absorbance with the TA concentration are examined in the low and high concentration regimes.

View Article: PubMed Central - PubMed

Affiliation: Physics Department, University of Abou Bekr Belkaid, 13000 Tlemcen, Algeria.

ABSTRACT
Spherical gold nanoparticles (GNPs) have been synthesized in aqueous solutions using sodium citrate (SC) and tannic acid (TA) as reducing and stabilizing agents. Upon addition of TA and compared to the GNP TA-free aqueous solutions, a reduction of the GNPs size and consequently a dramatic change of their optical properties have been observed and quantitatively analyzed using Mie theory. An increase in the concentration of TA reveals a modification of the colloidal solution refractive index that is evidenced by the shift in the peak position of the localized surface plasmon resonance (LSPR) band. The variations of the peak absorbance with the TA concentration are examined in the low and high concentration regimes.

No MeSH data available.


Related in: MedlinePlus