Characterization of Gold Nanoparticles Synthesized Using Sucrose by Seeding Formation in the Solid Phase and Seeding Growth in Aqueous Solution

Abstract

A simple method for safely preparing Au nanoparticles of a few to 20 nm in diameter has been developed on the basis of chemical reduction of HAuCl 4 with glucose and fructose produced by the acidic hydrolysis of sucrose. The method includes seeding formation in the solid mixture of HAuCl 4 and sucrose via heat treatment at 70-100 °C and seeding growth after dissolving the heated mixture in water at room temperature. The X-ray photoelectron spectroscopic analyses of the HAuCl 4 -sucrose mixture heated at 80 °C for 15 min confirmed the presence of Au(0) and Au(I) in the sample. Both the X-ray diffraction and UV-vis spectroscopic measurements of the heated mixture suggest the very small sizes of gold clusters in the sample. The particle growth in the aqueous solution was followed by in-situ monitoring of the surface plasmon band with a timeresolved UV-vis spectrometer. The size and size distribution of the resulting nanoparticles were measured by both dynamic light scattering and transmission electron microscopy. Electrophoresis combined with visible spectroscopy confirmed that gold nanoparticles in the aqueous solution carried negative charges that resulted from carboxylic acid groups bound to the particles, based on the infrared spectroscopic measurement.

Experimental and theoretical study on the synthesis of gold nanoparticles using ceftriaxone as a stabilizing reagent for and its catalysis for dopamine

“…1b, the size of GNPs is about 25-100 nm. The GNPs on the GCE surface is similar to those in aqueous due to the reduction of HAuCl 4 . From the molecular structure of ceftriaxone it can be seen that the gold atoms of surface of GNPs adsorb the negative ions (ceftriaxone) with the polar groups such as carbonyl, carboxyl, and amidocyanogen.…”

“…The strategies for immobilization of GNPs layers onto the surfaces include electrostatic links and covalent bonding. The surface of functional groups (COOH, OH, SH, and NH 2 ) are suitable substrate for the deposition of GNPs [2][3][4][5]. The reduction of HAuCl 4 is the most used methods for the preparation of GNPs in aqueous solution; reductants such as ascorbic acid [6], citrate [7][8][9], and borohydride [10,11] have been used in this reaction.…”

Single-Step Biofriendly Synthesis of Surface Modifiable, Near-Spherical Gold Nanoparticles for Applications in Biological Detection and Catalysis

“…17,18 In particular, the [21][22][23] However, the reported green synthetic methods thus far yield GNPs with a narrow size range (30 nm) with minimum monodispersity. [24][25][26] To our knowledge, we report for the first time a controllable synthesis of near-spherical, larger GNPs of the size range of 10-120 nm in advantageous yields without any secondary capping or surface modification. Thus, the need for a highly laborious size-sorting or seeding of any preformed crystals or the multiple step non ecofriendly reaction processes is eliminated.…”

Investigation of lichen based green synthesis of silver nanoparticles with response surface methodology

“…There is a variety of chemical and physical techniques to prepare metal nanoparticles, such as chemical reduction [12,13], electrochemical reduction [14,15], photochemical reduction [16,17] and heat evaporation [18,19]. Although there are different techniques to synthesize metallic nanoparticles, these methods have many disadvantages, for instance, the use of hazardous chemicals, high energy consumption and generation of hazardous by-products [20].…”