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Synthesis and characterization of dodecanethiol-stabilized gold nanoparticles

DSpace at IIT Bombay

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Title Synthesis and characterization of dodecanethiol-stabilized gold nanoparticles
 
Creator SHARMA, A
SINGH, BP
GATHANIA, AK
 
Subject Nanoparticles
Fourier transform infrared spectroscopy
Transmission electron microscopy
Ultraviolet-visible spectroscopy
EXTINCTION COEFFICIENT
CATALYTIC-ACTIVITY
SIZE
ABSORPTION
MOLECULES
SPECTRA
 
Description Dodecanethiol-stabilized gold nanoparticles of different sizes were synthesized using Bi-phasic reduction method by varying the concentration of stabilizer. These particles were characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and ultraviolet-visible spectroscopy (UV-Vis). TEM images show the average particle size of different samples ranging from similar to 1.7 nm to 5.7 nm. FTIR study confirms the linkage of thiol group and their partial crystalline self assembly onto the surface of nano gold particles. From the UV-Vis spectra, it is noticed that absorption peak position is sensitive to the size of the particles. Theoretical fit for absorbance spectra was obtained using Mie theory and the deviation from experimental results demonstrates the large size and shape distribution. A linear relationship between logarithms of extinction coefficient and particle diameter is obtained, which explains the extinction coefficient dependence on the size of the particle.
 
Publisher NATL INST SCIENCE COMMUNICATION-NISCAIR
 
Date 2014-12-28T09:12:53Z
2014-12-28T09:12:53Z
2014
 
Type Article
 
Identifier INDIAN JOURNAL OF PURE & APPLIED PHYSICS, 52(2)93-100
0019-5596
0975-1041
http://dspace.library.iitb.ac.in/jspui/handle/100/16257
 
Language English