Effect of pH and biological media on polyvinylpyrrolidone-capped silver nanoparticles
| Autor: | Noor Aini Abdul Rashid, Mohd Firdaus Abdul-Wahab, Chew Ping Lau, Jafariah Jaafar, Giek Far Chan |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Polyvinylpyrrolidone Inorganic chemistry Nanoparticle 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Silver nanoparticle chemistry Ionic strength Zeta potential medicine Surface modification Organic matter 0210 nano-technology Incubation 0105 earth and related environmental sciences Nuclear chemistry medicine.drug |
| Zdroj: | AIP Conference Proceedings. |
| ISSN: | 0094-243X |
| Popis: | Toxicity and mobility of silver nanoparticles (AgNPs) vary in different surrounding environments. Surface coatings or functionalization, temperature, pH, dissolved oxygen concentration, nanoparticle concentration, the presence of organic matter, and ionic strength are factors which dictate the transformation of AgNPs in terms of aggregation and stabilization. Thus, the purpose of this study is to investigate the behavior of polyvinylpyrrolidone (PVP)-capped AgNPs at different pHs (pH 2 to 10) and in different biological media (0.1 M phosphate buffer, nutrient broth, P5 and modified P5 media) analyzed using UV-Vis spectroscopy and zeta potential analyzer. The PVP-capped AgNPs changed its behavior in the presence of varying media, after 24 h incubation with shaking at 200 rpm at 30°C. No aggregation was observed at pH 4 to 10, but distinctive at very low pH of 2. Low pH further destabilized PVP-capped AgNPs after 24 h of incubation. High ionic strength 0.1 M phosphate buffer also resulted in slow aggregatio... |
| Databáze: | OpenAIRE |
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