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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 24, Number 5
BKCSDE 24(5)
May 20, 2003 

 
Title
Thermal Decomposition of Octanethiolate Self-Assembled Monolayers on Cu(111) in UHV
Author
Myung M. Sung, Won J. Yun, Sun S. Lee, Yunsoo Kim
Keywords
Self-assembled monolayers, Octanethiol, Cu(111), Thermal decomposition
Abstract
Octanethiol (CH3(CH2)7SH) based self-assembled monolayer on Cu(111) in ultra-high vacuum has been examined using x-ray photoelectron spectroscopy (XPS), temperature programmed desorption (TPD), intergrated desorption mass spectrometry (IDMS), and contact angle analysis. The results show that the octanethiolate monolayers similar to those on gold are formed on Cu(111). The monolayers are stable up to temperatures of about 480 K. Above 495 K the monolayers decompose via the g-hydrogen elimination mechanism to yield 1-octene in the gas phase. The thiolate head groups on the copper surface change to Cu2S following the decomposition of hydrocarbon fragments in the monolayers at about 605 K.
Page
610 - 612
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