# Relaxation and the Reentrant Appearance of Phases in a Molecular Monolayer

 Title: Relaxation and the Reentrant Appearance of Phases in a Molecular Monolayer Author: Schlossman, M. L.; Schwartz, D. K.; Pershan, Peter S.; Kawamoto, E. H.; Kellogg, G. J.; Lee, S. Note: Order does not necessarily reflect citation order of authors. Citation: Schlossman, M. L., D. K. Schwartz, Peter S. Pershan, E. H. Kawamoto, G. J. Kellogg, and S. Lee. 1991. Relaxation and the reentrant appearance of phases in a molecular monolayer. Physical Review Letters 66(12): 1599-1602. Full Text & Related Files: Scholossman_Relaxation.pdf (753.1Kb; PDF) Abstract: The structure of monolayers of $$CH_{3}(CH_{2})_{22}COOH$$ on water, along $$\sim$$21$$^\circ$$C isotherms between 18 and 35 Å$$^2$$/molecule, has been studied with glancing-angle x-ray diffraction and specular reflection. Following an incremental area change, in some regions of the isotherm, the diffraction pattern evolves until the surface pressure $$\pi$$ is relaxing $$\lesssim$$ 0.01 dyn/cm h. Reentrant behavior between tilted and nontilted phases is observed. Phase coexistence is indicated by differences between the deposited area/molecule and the area of the x-ray-determined unit cell. Published Version: doi:10.1103/PhysRevLett.66.1599 Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10357549 Downloads of this work: