A visual tutorial on the synthesis of gold nanoparticles

Abstract

Many papers have been written on the synthesis of gold nanoparticles but very few included pictures of the process, and none of them used video to show the whole process of synthesis. This paper records the process of synthesis of gold nanoparticles using video clips. Every process from cleaning of glassware, an important step in the synthesis of metallic nanoparticles, to the dialysis process is shown. It also includes the preparation of aqua regia and the actual synthesis of gold nanoparticles. In some papers, the dialysis process was omitted, but in this paper, it is included to complete the whole process as it is being used for purification.

Tunable, biodegradable gold nanoparticles as contrast agents for computed tomography and photoacoustic imaging

“…37,38 Gold (III) chloride was reduced by addition of sodium borohydride in small batches, followed by surface modification with a capping ligand. For each batch, 8 mg of AuCl 3 was dissolved in 100 ml of DI water while stirring.…”

AuNPs modified, disposable, ITO based biosensor: Early diagnosis of heat shock protein 70

“…500 mL of 10 mL 0.13 M sodium borohydride (NaBH 4 ) was added dropwise to the 500 mL of solution containing HAuCl 4 Á 3H 2 O while stirring. The color of the solution should change from yellow to ruby red (Kah et al, 2008;Low and Bansal, 2010). Then, cleaned ITO-PET electrodes were immersed in this solution for 24 h in a dark ambient.…”

Preparation and Characterization of Gold Nanoparticles with Amino Acids, Examination of Their Stability

“…The gold nanoparticles capped and stabilized with thiol-derivative monolayers are dispersed in organic solvents [7,10]. Since then enormous researches have been performed on modifying the surface of gold colloids through changing the molecular structures of the thiolates on the particle surface [11][12][13][14][15][16][17]. The protection capping agent (thiols) is chemically bound to the surface of gold nanoparticles [7].…”