Research Publication Title

Green Synthesis of Silver Nanoparticles: Synthesizing Silver Nanoparticles with L-Theanine

Presenter Information

sarah stognerFollow

Major

Chemistry

Faculty Mentor

Dr. Peter Rosado-Flores

Keywords

Silver Nanoparticles, Green Nanotechnology, L-Theanine

Abstract

Silver Nanoparticles have many antibacterial uses and are becoming widely used in the medical field, industrial field, and many more industries. Creating a greener way to synthesis silver nanoparticles has been a focus within. L- Theanine, a common ingredient found in tea leaves, has been used as a reducing agent in the synthesis of silver nanoparticles. Silver Nanoparticles were obtained by mixing the following solutions, Silver nitrate, Sodium Borohydride, and L-Theanine solution. Due to the unstable silver nanoparticles formed, a stabilizer was needed. Polyvinyl alcohol (PVA) and Polyvinylpyrrolidone (PVP) were both used separately in order to stabilize the nanoparticles. With the use of Polyvinylpyrrolidone, the absorbance decreased by 8% in 40 minutes while the silver nanoparticles without PVP had a 95.9% decrease in absorbance over a 40-minute time period. In order to measure the size of the silver nanoparticles, UV- Vis absorption spectroscopy was used. Based on the UV-Vis spectroscopy, the size of the nanoparticles was around 380 to 410 nm. Silver nanoparticles made with L-Theanine have been stabilized, showing that this green method can be used to obtain silver nanoparticles.

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Green Synthesis of Silver Nanoparticles: Synthesizing Silver Nanoparticles with L-Theanine

Silver Nanoparticles have many antibacterial uses and are becoming widely used in the medical field, industrial field, and many more industries. Creating a greener way to synthesis silver nanoparticles has been a focus within. L- Theanine, a common ingredient found in tea leaves, has been used as a reducing agent in the synthesis of silver nanoparticles. Silver Nanoparticles were obtained by mixing the following solutions, Silver nitrate, Sodium Borohydride, and L-Theanine solution. Due to the unstable silver nanoparticles formed, a stabilizer was needed. Polyvinyl alcohol (PVA) and Polyvinylpyrrolidone (PVP) were both used separately in order to stabilize the nanoparticles. With the use of Polyvinylpyrrolidone, the absorbance decreased by 8% in 40 minutes while the silver nanoparticles without PVP had a 95.9% decrease in absorbance over a 40-minute time period. In order to measure the size of the silver nanoparticles, UV- Vis absorption spectroscopy was used. Based on the UV-Vis spectroscopy, the size of the nanoparticles was around 380 to 410 nm. Silver nanoparticles made with L-Theanine have been stabilized, showing that this green method can be used to obtain silver nanoparticles.

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