Terahertz Time-Domain Study of Silver Nanoparticles Synthesized by Laser Ablation in Organic Liquid

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2016-07-01

Author

Koral, Can
ORTAÇ, Bülend
Altan, Hakan

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We report the investigation of laser-synthesized Ag nanoparticles (Ag-NPs) in an organic liquid environment by using terahertz time-domain spectroscopy (THz-TDS) technique. Colloidal Ag-NPs with an average diameter of 10 nm in two-propanol solution through nanosecond pulsed laser ablation were synthesized. THz-TDS measurements were performed on different volumetric concentration of Ag-NPs suspensions placed in 2-mm path length quartz cuvette. Due to the dispersive and highly absorptive nature of the nano liquids, an approach based on extracting the optical properties through the changes in amplitude and phase solely around the main peak of THz waveform is developed. This approach allowed for an accurate estimation of the complex refractive index of the Metallic-NPs suspension for the different prepared volumetric concentrations. In addition, using Maxwell-Garnett theory, the NP concentration is also extracted. This method shows that the time-domain nature of the THz pulse measurement technique is extremely useful in instances where slight variations in highly dispersive samples need to be investigated.

Subject Keywords

THz applications in chemistry and spectroscopy, THz modeling and analysis techniques

URI

https://hdl.handle.net/11511/46318

Journal

IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY

DOI

https://doi.org/10.1109/tthz.2016.2572360

Collections

Department of Physics, Article

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Citation Formats

C. Koral, B. ORTAÇ, and H. Altan, “Terahertz Time-Domain Study of Silver Nanoparticles Synthesized by Laser Ablation in Organic Liquid,” IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY, pp. 525–531, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46318.