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

fYear

2012

Firstpage

851

Lastpage

854

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Control and Electronics Engineering (ICICEE), 2012 International Conference on

Conference_Location

Xi´an

Print_ISBN

978-1-4673-1450-3

Type

conf

DOI

10.1109/ICICEE.2012.226

Filename

6322515