Functionalization of silver and gold nanoparticles using amino acid conjugated bile salts with tunable longitudinal plasmon resonance

A simple approach to obtain hybrid Au-loaded polymeric nanoparticles with a tunable metal load

“…It has been previously demonstrated that the S–Au bond is partially covalent (35%) and mostly electrostatic (65%). 41 In addition, it is reported that both surfactants 42 , 43 can provide electrons (reducing agent) to Au 3+ ions through the hydroxyl groups and direct the formation of Au NPs. However, the reduction time required is higher than 4 days at room temperature.…”

Controlled spontaneous generation of gold nanoparticles assisted by dual reducing and capping agents

“…8 to 40 - [72] 40 Sargassum wightii 8 to 12 11 [73] 41 Thermonospora sp. 7 to 12 8 [74] 42 Shewanella oneidensis 5 to 10 8.4±0.7 [75] 43 Bile salts 4 to 30 10 [76] 44 Bovine serum albumin -2 [ 77] 45 Cholesterol phenoxy hexanoate 12 to 16 - [79] 46 Cucurbit [7]uril 6 to 22 10±1.6 [80] 47 Thiacalix [4]arene -13.5 [81] 48 β-Cyclodextrin 60 to 100 - [82] 49 Hydroquinone 17 to 25 20 [83] 50 2,3,5,6-Tetrakis-(morpholinomethyl)hydroquinone -170±17 [84] 24 20 relationship existing between the surface of the particles and the stabilizing agent. In this regard, the growth of gold nanocrystals persists as long as the crystallization sites are not blocked by the capping agent and as long as the gold (III) salt is available in the reaction medium.…”

“…However, sodium salts of the amino acids conjugates of bile salts successfully produced gold clusters surrounded by a shell of amino acids [76]. Presence of amino and carboxylic groups on amino acids (taurine and lysine) formed anchoring points that strongly bind to the surface of the nanoparticles.…”

The Synthesis of silver nanoparticles using Beetroot extract and its antibacterial and catalytic activity

“…In green synthesis of NPs by plants, plant acts as a reductant of metal ions and stabilizer of nanoparticles [42]. According to Figure 4 with increasing the amount of extract from 0.1 to 2 mL, the value of NPs absorbance increases sharply and more NPs are produced [43].…”