Orientational Structure of Thiophene Thiol Self-Assembled Monolayer Studied by Using Metastable Atom Electron Spectroscopy and Infrared Reflection Absorption Spectroscopy

Langmuir ◽  
2001 ◽  
Vol 17 (14) ◽  
pp. 4282-4286 ◽  
Author(s):  
Eisuke Ito ◽  
Masato Yamamoto ◽  
Kotaro Kajikawa ◽  
Daisuke Yamashita ◽  
Hisao Ishii ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Electron Spectroscopy ◽  
Metastable Atom ◽  
Self Assembled Monolayer ◽  
Infrared Reflection Absorption Spectroscopy ◽  
Infrared Reflection ◽  
Self Assembled ◽  
Orientational Structure

Self-Assembled Monolayers Derived from Bidentate Organosulfur Adsorbates

1999 ◽  
Vol 576 ◽  
Author(s):  
Young-Seok Shon ◽  
Nupur Garg ◽  
Ramon Colorado ◽  
Ramon J. Villazana ◽  
T. Randall Lee
Keyword(s):  
Contact Angle ◽  
Chain Length ◽  
Absorption Spectroscopy ◽  
Self Assembled Monolayers ◽  
Polarization Modulation ◽  
Infrared Reflection Absorption Spectroscopy ◽  
Infrared Reflection ◽  
Assembled Monolayers ◽  
Optical Ellipsometry ◽  
Self Assembled

ABSTRACTThe adsorption of a series of 1,2-bis(mercaptomethyl)-4,5-dialkylbenzenes (1), spiroalkanedithiols (2), and aliphatic dithiocarboxylic acids (3) on gold yielded new types of self-assembled monolayers (SAMs). The new SAMs were characterized by optical ellipsometry, contact angle goniometry, and polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS). These results were compared to those obtained from SAMs derived from normal alkanethiols (4) of analogous chain length. Comparisons of ellipsometric thickness and contact angle wettability showed that the new SAMs were well packed and highly oriented. Comparisons of the PM-IRRAS data showed that the SAMs generated from 1 and 2 exhibited slightly less crystallinity than their alkanethiolate-based analogs, while the SAMs generated from 3 exhibited comparable crystallinity to their alkanethiolate-based analogs. Moreover, the SAMs derived from 1 and 2 showed no “odd-even” wettability or PM-IRRAS effects, while those derived from 3 showed remarkably large “odd-even” effects compared to those derived from normal alkanethiols.

Sign in / Sign up

Export Citation Format

Share Document