We report the comparison of a series of 2D molecular crystals formed from the intermediates of the dehalogenation reaction of iodoethane versus various fluorinated iodoalkanes on Cu(111). High-resolution scanning tunneling microscopy enables us to distinguish the alkyl groups from the iodine atoms, and we find that the ethyl groups and iodine atoms formed from the dissociation of ethyl iodide are well mixed. However, fluorination of the alkyl tail changes this behavior and leads to local segregation of the two species on the surface. We postulate that the low-polarizability and relatively large dipole moment of the fluorinated species drive the ordered assemblies of the fluorinated alkyl species on the surface and discuss this in the context of how solvophobicity can drive the clustering of fluorinated groups and, hence, phase separation.
Skip Nav Destination
Article navigation
December 2021
Research Article|
October 06 2021
Comparison of 2D crystals formed by dissociative adsorption of fluorinated and nonfluorinated alkyl iodides on Cu(111)
Special Collection:
Commemorating the Career of Pat Thiel
Tedros A. Balema;
Tedros A. Balema
Department of Chemistry, Tufts University
, Medford, Massachusetts 02155
Search for other works by this author on:
Amanda M. Larson;
Amanda M. Larson
Department of Chemistry, Tufts University
, Medford, Massachusetts 02155
Search for other works by this author on:
Yicheng Wang
;
Yicheng Wang
Department of Chemistry, Tufts University
, Medford, Massachusetts 02155
Search for other works by this author on:
Dipna A. Patel;
Dipna A. Patel
Department of Chemistry, Tufts University
, Medford, Massachusetts 02155
Search for other works by this author on:
Krishna Kumar;
Krishna Kumar
Department of Chemistry, Tufts University
, Medford, Massachusetts 02155
Search for other works by this author on:
E. Charles H. Sykes
E. Charles H. Sykes
a)
Department of Chemistry, Tufts University
, Medford, Massachusetts 02155a)Author to whom correspondence should be addressed: charles.sykes@tufts.edu
Search for other works by this author on:
a)Author to whom correspondence should be addressed: charles.sykes@tufts.edu
Note: This paper is a part of the Special Collection Commemorating the Career of Pat Thiel.
J. Vac. Sci. Technol. A 39, 063211 (2021)
Article history
Received:
July 26 2021
Accepted:
September 13 2021
Citation
Tedros A. Balema, Amanda M. Larson, Yicheng Wang, Dipna A. Patel, Krishna Kumar, E. Charles H. Sykes; Comparison of 2D crystals formed by dissociative adsorption of fluorinated and nonfluorinated alkyl iodides on Cu(111). J. Vac. Sci. Technol. A 1 December 2021; 39 (6): 063211. https://doi.org/10.1116/6.0001316
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Sign in via your Institution
Sign in via your InstitutionPay-Per-View Access
$40.00
491
Views
Citing articles via
Related Content
Investigation of the short-time photodissociation dynamics of trans-1-bromo-2-iodoethane in the A -band absorption
J. Chem. Phys. (January 1999)
Self-assembly of semifluorinated n -alkanethiols on {111}-oriented Au investigated with scanning tunneling microscopy experiment and theory
J. Chem. Phys. (July 2007)
1/f noise analysis in high mobility polymer-based OTFTs with non-fluorinated dielectric
Appl. Phys. Lett. (June 2019)
Oxidation studies of fluorine containing diamond films
Appl. Phys. Lett. (August 1991)
Process development and characterization of antisticking layers on nickel-based stamps designed for nanoimprint lithography
J. Vac. Sci. Technol. B (December 2004)