Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Colliding Self-Assembly Waves in Organosilane Monolayers


K Efimenko, Ali Ozcam, Jan Genzer, Daniel A. Fischer, Frederick R. Phelan Jr., Jack F. Douglas


Colliding autocatalytic wave-fronts of organosilane (OS) layer self-assembly are generated through the controlled positioning of sources of the volatile OS material at the edges of a silica wafer and through adjustment of the container dimensions in which the wafer-source system is placed. The concentration profiles and molecular orientation of the OSs of colliding wave-fronts are assessed by means of combinatorial near-edge x-ray absorption fine structure (NEXAFS) spectroscopy. For systems involving waves made of the same OS precursor (homogeneous systems), the shapes and positions of both fronts on the surface are centro-symmetrical. In contrast, heterogeneous systems, involving OSs having different chemistries and head-groups, exhibit highly non-symmetrical concentration profiles on the substrate. We discuss effects relevant to understanding these wave-front collision phenomena.
Soft Matter Gradient Surfaces: Methods & Applications
Publisher Info
Wiley, New York, NY


fluctuation-induced interfacial broadening, frontal self-assembly, mean-field Fisher Kolmogorov equation, reaction diffusion fronts, self-assembled monolayers


Efimenko, K. , Ozcam, A. , Genzer, J. , Fischer, D. , Phelan, F. and Douglas, J. (1970), Colliding Self-Assembly Waves in Organosilane Monolayers, Wiley, New York, NY (Accessed April 20, 2024)
Created May 7, 2017, Updated February 19, 2017