Synthesis and Characterization of Silver Hydrosols in the Presence of Carboxyalkylated Amine Complexones

G P Shevchenko,V A Zhuravkov,E V Tret’Yak,A G Novikov,O V Korolik

doi:10.1134/s0036023618010163

G P Shevchenko, V A Zhuravkov + Show 3 more

Open Access

https://doi.org/10.1134/s0036023618010163

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Abstract

The specifics of formation of silver nanoparticles in aqueous solution in the presence of carboxyalkylated amine complexones (NTA and DTPA) have been studied for the first time. Sols with these ligands are found to be formed in alkali solutions at рН ≥ 10.0 and 80°С. Their optical spectra and the particle sizes and morphologies are determined by synthesis conditions: рН, the ratio Ag+/L, and the order of mixing components. A scheme has been suggested for silver nanoparticle formation in the presence of NTA and DTPA, consistent with the experimental results. The efficacy of the prepared silver sols in SERS measurements is shown.

Highlights

The specifics of formation of silver nanoparticles in aqueous solution in the presence of carboxyalkylated amine complexones (NTA and diethylenetriaminepentaacetic acid (DTPA)) have been studied for the first time
transmission electron microscopy (TEM) studies show that, in the presence of DTPA, silver particle morphology and particle size in sols only insignificantly depend on the synthesis variant (Figs. 3a, 3b)
Comprising the intensities of the major Raman bands, we found that Raman amplification for the DTPA-containing sols is 108, being 106 in the case of nitrilotriacetic acid (NTA)

Summary

OF INORGANIC COMPOUNDS

Abstract—The specifics of formation of silver nanoparticles in aqueous solution in the presence of carboxyalkylated amine complexones (NTA and DTPA) have been studied for the first time. Sols with these ligands are found to be formed in alkali solutions at рН ≥ 10.0 and 80°С. Their optical spectra and the particle sizes and morphologies are determined by synthesis conditions: рН, the ratio Ag+/L, and the order of mixing components. In variant 1, NTA (DTPA) and NaOH solutions were mixed to obtain the working value of рН; in variant 2, NTA (DTPA) and AgNO3 solutions were mixed. The morphology and grain sizes of sols were determined by transmission electron microscopy (TEM)

Raman signal amplification was studied by recording

The synthesis of silver sols in the presence of

Sol Formation in the Presence of DTPA

Sol Formation in the Presence of NTA

CONCLUSIONS