scholarly journals Tannic acid-modified silver nanoparticles for wound healing: the importance of size

2018 ◽  
Vol Volume 13 ◽  
pp. 991-1007 ◽  
Author(s):  
Piotr Orlowski ◽  
Magdalena Zmigrodzka ◽  
Emilia Tomaszewska ◽  
Katarzyna Ranoszek-Soliwoda ◽  
Monika Czupryn ◽  
...  
Keyword(s):  
Wound Healing ◽  
Silver Nanoparticles ◽  
Tannic Acid

scholarly journals Single-Step Green Synthesis of Highly Concentrated and Stable Colloidal Dispersion of Core-Shell Silver Nanoparticles and Their Antimicrobial and Ultra-High Catalytic Properties

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 1007
Author(s):  
Azam Ali ◽  
Mariyam Sattar ◽  
Fiaz Hussain ◽  
Muhammad Humble Khalid Tareen ◽  
Jiri Militky ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Tannic Acid ◽  
Rate Constant ◽  
Catalytic Properties ◽  
Colloidal Dispersion ◽  
Alkaline Condition ◽  
Core Shell ◽  
Average Particle ◽  
Ag Nps

The versatile one-pot green synthesis of a highly concentrated and stable colloidal dispersion of silver nanoparticles (Ag NPs) was carried out using the self-assembled tannic acid without using any other hazardous chemicals. Tannic acid (Plant-based polyphenol) was used as a reducing and stabilizing agent for silver nitrate in a mild alkaline condition. The synthesized Ag NPs were characterized for their concentration, capping, size distribution, and shape. The experimental results confirmed the successful synthesis of nearly spherical and highly concentrated (2281 ppm) Ag NPs, capped with poly-tannic acid (Ag NPs-PTA). The average particle size of Ag NPs-PTA was found to be 9.90 ± 1.60 nm. The colloidal dispersion of synthesized nanoparticles was observed to be stable for more than 15 months in the ambient environment (25 °C, 65% relative humidity). The synthesized AgNPs-PTA showed an effective antimicrobial activity against Staphylococcus Aureus (ZOI 3.0 mM) and Escherichia coli (ZOI 3.5 mM). Ag NPs-PTA also exhibited enhanced catalytic properties. It reduces 4-nitrophenol into 4-aminophenol in the presence of NaBH4 with a normalized rate constant (Knor = K/m) of 615.04 mL·s−1·mg−1. For comparison, bare Ag NPs show catalytic activity with a normalized rate constant of 139.78 mL·s−1·mg−1. Furthermore, AgNPs-PTA were stable for more than 15 months under ambient conditions. The ultra-high catalytic and good antimicrobial properties can be attributed to the fine size and good aqueous stability of Ag NPs-PTA. The unique core-shell structure and ease of synthesis render the synthesized nanoparticles superior to others, with potential for large-scale applications, especially in the field of catalysis and medical.

Mussel-inspired immobilization of zwitterionic silver nanoparticles toward antibacterial cotton gauze for promoting wound healing

2021 ◽  
Vol 409 ◽  
pp. 128291
Author(s):  
Jun Xiang ◽  
Ruixin Zhu ◽  
Shiying Lang ◽  
Hui Yan ◽  
Gongyan Liu ◽  
...  
Keyword(s):  
Wound Healing ◽  
Silver Nanoparticles ◽  
Cotton Gauze

Tannic acid-mediated green synthesis of antibacterial silver nanoparticles

2016 ◽  
Vol 39 (4) ◽  
pp. 465-473 ◽  
Author(s):  
Tae Yoon Kim ◽  
Song-Hyun Cha ◽  
Seonho Cho ◽  
Youmie Park
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Tannic Acid

Temperature-sensitive poly(N-isopropylacrylamide) (PNIPAAm) stabilized size controllable synthesis of silver nanoparticles and its improved antimicrobial activity for wound healing and nursing care after femoral fracture during surgery

2021 ◽  
Vol 11 (1) ◽  
pp. 73-84
Author(s):  
Xiaoyun Wang ◽  
Jing Zhang
Keyword(s):  
Wound Healing ◽  
Silver Nanoparticles ◽  
Femoral Fracture ◽  
Bacterial Resistance ◽  
Polymer Nanocomposite ◽  
Temperature Sensitive ◽  
Solution Stability ◽  
Uniform Dispersion ◽  
Significant Temperature ◽  
Thermosensitive Copolymer

In this research, a thermo-sensitive copolymer PNIPAAm-co-MHq was used to successfully synthesize different nano sizes silver nanoparticles in the ranges between 1.5 to 4 nm with uniform dispersion. The polymeric assisted synthesized Ag nanoparticles (AgNPs@PM) exhibited reasonable solution stability and thermalresponsive behaviour. In specific, AgNPs@PM3 (1.59 nm) displayed improved bacterial resistance against clinically approved anti-biotic resistant bacterial pathigens with very low MIC value (4.05 μg/mL). Subsequently, the thermal responsive polymeric molecular structure on AgNPs synthesis has been established that significant temperature dependened anti-bacterial efficiency. It was also observed that the nonparticipants size, temperature responses and proportion of thermosensitive copolymer also influenced the antibacterial efficacy of AgNPs@PM. Resulting thermal sensitive polymer nanocomposite can be extremely beneficial for wound healing treatment after femoral fracture surgery.

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