Sub-ppm detection of gold nanoparticle transducer toward carboxyl functionality

Author

Kim, Young Jun ; Cho, Seung M. ; Pyo, Hyeon-Bong ; Choi, Chang Auck

Author_Institution

Basic Res. Lab., Electron. & Telecommun. Res. Inst., Daejeon

fYear

2005

fDate

Oct. 30 2005-Nov. 3 2005

Abstract

Gold nanoparticles functionalized with methyl 3-mercaptopropionate (MMP) were synthesized and used as sensor materials to detect acetic acid in the sub-ppm range. The success of the MMP gold nanoparticles was confirmed by high resolution TEM and FTIR. The average diameter was characterized by TEM to be 3.1 nm. Transducer film was formed on a glass or a silicon substrate mounted with interdigitated gold electrodes. Highly porous morphology with sub-micron porosity was observed by SEM images of the nanoparticle film. The nanoparticle sensor was able to reproducibly detect around 50 ppb of acetic acid. Moreover linear relationship between response amplitude and analyte concentration was observed at least from 40 ppb to 2000 ppb

Keywords

Fourier transform spectroscopy; gold; infrared spectroscopy; nanoparticles; organic compounds; scanning electron microscopy; sensors; transducers; transmission electron microscopy; 3.1 nm; Fourier transform infrared; SEM images; acetic acid detection; gold nanoparticle transducer; interdigitated gold electrodes; methyl 3-mercaptopropionate; nanoparticle sensor; transducer film; transmission electron microscopy; Electrodes; Glass; Gold; Morphology; Nanoparticles; Semiconductor films; Sensor phenomena and characterization; Silicon; Substrates; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2005 IEEE

Conference_Location

Irvine, CA

Print_ISBN

0-7803-9056-3

Type

conf

DOI

10.1109/ICSENS.2005.1597832

Filename

1597832