Title :
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
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;
Conference_Titel :
Sensors, 2005 IEEE
Conference_Location :
Irvine, CA
Print_ISBN :
0-7803-9056-3
DOI :
10.1109/ICSENS.2005.1597832
