Accession Number : ADA254887


Title :   Manipulation of the Wettability of Surfaces on the 0.1 to 1 Micrometer Scale Through Micromachining and Molecular Self-Assembly


Descriptive Note : Interim rept.,


Corporate Author : HARVARD UNIV CAMBRIDGE MA DEPT OF CHEMISTRY


Personal Author(s) : Abbott, Nicholas L ; Folkers, John P ; Whitesides, George M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a254887.pdf


Report Date : Jul 1992


Pagination or Media Count : 17


Abstract : Micromachining allows the formation of micrometer-sized regions of bare gold on the surface of a gold film supporting a self-assembled monolayer (SAM) of alkanethiolate. A second SAM forms on the micromachined surfaces on exposing the entire system--the remaining undisturbed gold-supported SAM and the micromachined features of bare gold--to a solution of dialkyldisulfide. By preparing an initial hydrophilic SAM from HS( CH2 )15COOH, micromachining features into this SAM, and covering these features with a hydrophobic SAM formed from [CH(3)(CH(2))(11)S]2, it is possible to construct micrometer-scale hydrophobic lines in a hydrophilic surface. These lines provide new structures with which to manipulate the shapes of liquid drops.


Descriptors :   *SURFACES , *GOLD , LIQUIDS , SHAPE , SCALE , COVERINGS , MICROMETERS , ASSEMBLY , DROPS , FILMS , REGIONS


Subject Categories : Inorganic Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE