About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
14th Symposium on Green and Sustainable Technologies for Materials Manufacturing and Processing
|
| Presentation Title |
L-9: Green Synthesis of ZnO Nanoparticles Using Lemongrass Extract and Measurement of Their Antibacterial Activities |
| Author(s) |
Tjokorde Walmiki Samadhi, Vita Wonoputri, David Tejasaputra Widagdo, Selli Widhi Astuti |
| On-Site Speaker (Planned) |
Tjokorde Walmiki Samadhi |
| Abstract Scope |
Zinc oxide nanoparticles were prepared by biosynthesis method using lemongrass extract as reducing and capping agents. Lemongrass stalks were refluxed in demineralized water at 98 °C to produce the extract. Zinc nitrate solution and lemongrass extract were then mixed under constant agitation at ambient and 60 °C for periods of 6 and 24 hrs. The resulting precipitates were centrifuged and dried in an electric oven. Formation of particles during the reaction was observed by UV-Vis spectrophotometry, while the presence of ZnO phase in the final product was confirmed by XRD. FTIR analyses suggested that functional groups from the extract remained in the nanoparticles. TEM imaging indicates well-crystallized nanoparticles in the 10 nm diameter order, with substantial agglomeration. Antibacterial and antibiofilm activities were measured using Escherichia coli ATCC 25922 as the model organism. All biosynthesized nanoparticles exhibited enhanced antibacterial and antibiofilm activities relative to the reference commercial ZnO nanoparticle. |