Deposition of silver nanoparticles from suspensions containing tannic acid

Biocidal Activity of Tannic Acid-Prepared Silver Nanoparticles towards Pathogens Isolated from Patients with Exacerbations of Chronic Rhinosinusitis

“…TA-AgNPs were deposited on poly (allylamine hydrochloride) (PAH)-mica sheets [ 29 ] and were imaged using atomic force microscopy (AFM). A typical AFM image of deposited TA-AgNPs and the size distribution of nanoparticles are presented in Figure 2 .…”

“…The electrokinetic measurements showed that the electrophoretic mobility of TA-AgNPs, determined using the stock suspension at the temperature of 20 and 37 °C, reached a value of −2.96 ± 0.23 and −3.30 ± 0.23 μm cm (Vs) −1 , respectively. The zeta potential of TA-AgNPs was calculated based on Henry’s model [ 29 ]. TA-AgNPs were negatively charged at pH 5.8 and characterized by the zeta potential equal to −52 ± 3 mV at the temperature of 37 °C.…”

“…The AFM imaging was performed in semi-contact mode using a silicon probe (polysilicon cantilevers with resonance frequencies of 240 kHz±10% or 140 kHz±10%, a typical tip curvature of 10 nm, and a cone angle less than 201). The samples for AFM imaging were prepared on PAH-modified mica sheets according to the procedure described previously [ 29 ]. The histograms were generated from the analysis of no less than 500 TA-AgNPs.…”

Quantitative and qualitative analyses of drug adsorption on silver nanoparticle monolayers: QCM, SERS, and TEIRA nanospectroscopy studies

“…For instance, AgNPs prepared with the use of tannic acid (TA) are less sensitive to the changes of pH and ionic strength than AgHHNPs. 31 Nevertheless, the use of TA as a medium weight molecular compound for AgNP stabilization causes the blocking of their active surface. Moreover, it was shown that the presence of TA molecules at a low bulk concentration in the range of 10 −6 –10 −5 M reduces the attachment efficiency of AgNPs to the solid surfaces.…”

Antibacterial activity of silver nanoparticles obtained by co-reduction with sodium citrate and tannic acid

“…Tannic acid (TA, C 76 H 52 O 46 ) was also proposed, single or associated with another reduction agent, for the synthesis of metal nanoparticles [24], having many phenolic groups in the structure. Due to its large molecule (molar mass: 1700 g), TA appears itself as nanoparticle (hydrodynamic diameter 1.63 nm) [25]. It becomes unstable when temperature and pH increase, and suffers hydrolysis and oxidation reactions.…”