Publication Date:
2003-01-18
Description:
We report the design of surfaces that exhibit dynamic changes in interfacial properties, such as wettability, in response to an electrical potential. The change in wetting behavior was caused by surface-confined, single-layered molecules undergoing conformational transitions between a hydrophilic and a moderately hydrophobic state. Reversible conformational transitions were confirmed at a molecular level with the use of sum-frequency generation spectroscopy and at a macroscopic level with the use of contact angle measurements. This type of surface design enables amplification of molecular-level conformational transitions to macroscopic changes in surface properties without altering the chemical identity of the surface. Such reversibly switching surfaces may open previously unknown opportunities in interfacial engineering.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lahann, Joerg -- Mitragotri, Samir -- Tran, Thanh-Nga -- Kaido, Hiroki -- Sundaram, Jagannathan -- Choi, Insung S -- Hoffer, Saskia -- Somorjai, Gabor A -- Langer, Robert -- New York, N.Y. -- Science. 2003 Jan 17;299(5605):371-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemical Engineering, Massachusetts Institute of Technology (MIT), 45 Carleton Street, Cambridge, MA 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12532011" target="_blank"〉PubMed〈/a〉
Keywords:
Adsorption
;
Chemistry, Physical
;
Electricity
;
Electrochemistry
;
Esters
;
Gold
;
Hydrogen-Ion Concentration
;
Hydrophobic and Hydrophilic Interactions
;
Molecular Conformation
;
Molecular Structure
;
Palmitic Acids/*chemistry
;
Physicochemical Phenomena
;
Spectrum Analysis
;
*Surface Properties
;
Thermodynamics
;
Wettability
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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