Title :
Analysis of Terahertz Absorption Spectra Characteristic of 1-Naphthaleneacetic Acid and 4-Chlorophenoxyacetic Acid in Terahertz Region
Author :
Ma, Yehao ; Wang, Qiang ; Wang, Xiaowei ; Gu, Xiaohong
Author_Institution :
Dept. of Quality & Safety Eng., China Jiliang Univ., Hangzhou, China
Abstract :
We firstly study terahertz time-domain spectroscopy (THz-TDS) characterization of two kinds of pesticides 1-naphthaleneacetic acid and 4-chlorophenoxyacetic acid. The absorption spectrum and refractive index of samples were measured. Theoretical investigation of the vibrational spectrum of pesticides was performed based on density function theory (DFT). We observed that experiment spectra are in rough qualitative agreement with these theory spectra. Its chemical composition was successfully identified through spectral analysis of the recorded terahertz waveform. These feature spectra measurements are helpful to form a database of pesticide.
Keywords :
agrochemicals; chemical analysis; density functional theory; electromagnetic wave propagation; refractive index; spectra; terahertz waves; 1-naphthaleneacetic acid; 4-chlorophenoxyacetic acid; DFT; density function theory; pesticide database; pesticides vibrational spectrum; refractive index; spectra measurements; terahertz absorption spectra characteristics; terahertz region; terahertz time-domain spectroscopy characterization; terahertz waveform recording; terahertz-TDS characterization; theory spectra; Absorption; Laser beams; Laser excitation; Materials; Refractive index; Spectroscopy; Vibrations; 1-naphthaleneacetic acid; 4-chlorophenoxyacetic acid; Terahertz; absorption spectrum;
Conference_Titel :
Industrial Control and Electronics Engineering (ICICEE), 2012 International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-1450-3
DOI :
10.1109/ICICEE.2012.226
