Results 251 to 260 of about 61,960 (294)

Surface Stress of Stepped Chiral Metal Surfaces

Physical Review Letters, 2009
The use of surface stress as a physical probe for examining chiral effects in surfaces is proposed. First-principles calculations of the surface stress in stepped achiral and chiral bcc metal surfaces (Fe, Mo, and W) are presented. When no mirror symmetry is present, principal stress orientations are unconstrained; nevertheless, we find that the stress
M, Blanco-Rey, S J, Pratt, S J, Jenkins
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Chiral Recognition in Surface Explosion

Journal of the American Chemical Society, 2004
The vast majority of chiral compounds crystallize into racemic crystals. It has been predicted and was experimentally established as a rule that chiral molecules on surfaces are more easily separated into homochiral domains due to confinement into a plane and lower entropic contributions.
Bahar, Behzadi, Sara, Romer, Roman, Fasel, Karl-Heinz, Ernst   +3 more
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Surface Chemistry of Chiral Compounds on Chiral and Achiral Surfaces

2022
This works aims to expand our understanding of amino acid surface chemistry on chiral and achiral metallic substrates. Both experimental and computational methods are employed to deepen our knowledge that relates the dependence of amino acid adsorption and decomposition kinetics on the chemical state, surface orientation, or external fields of the ...
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Surface waves in chiral layers

Optics Letters, 1991
We analyze the surface-wave propagation in homogeneous layers of chiral or optically active materials. Two cases of chiral slab are considered: a symmetric chiral slab waveguide and a grounded chiral slab waveguide. The dispersion relation and the electric-field components for surface waves guided in a symmetric chiral slab are analyzed and discussed ...
N, Engheta, P, Pelet
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Chiral Induction by Seeding Surface Assemblies of Chiral Switches

Journal of the American Chemical Society, 2011
It is demonstrated by scanning tunneling microscopy that coadsorption of a molecular chiral switch with a complementary, intrinsically chiral induction seed on the Au(111) surface leads to the formation of globally homochiral molecular assemblies.
Masini, Federico, Kalashnyk, Nataliya, Knudsen, Martin M, Cramer, Jacob R, Lægsgaard, Erik, Besenbacher, Flemming, Gothelf, Kurt V, Linderoth, Trolle R   +7 more
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Surface Reactivity at “Chiral” Platinum Surfaces

Langmuir, 1999
The electro-oxidation of d- and l-glucose has been investigated using the chiral electrode Pt{643}R and its enantiomorph Pt{643}S. Both electrodes are demonstrated to be enantioselective. We ascribe this behavior to the inherent (left or right) “handedness” of kink sites present at the surface.
Ahmad Ahmadi, Gary Attard, Juan Feliu, Antonio Rodes   +3 more
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Chiral metal surfaces for enantioselective processes

Nature Materials, 2020
Chiral surfaces are critical components of enantioselective heterogeneous processes such as those used to prepare enantiomerically pure pharmaceuticals. While the majority of chiral surfaces in practical use are based on achiral materials whose surfaces have been modified with enantiomerically pure chiral adsorbates, there are many inorganic materials ...
Nisha Shukla, Andrew J. Gellman
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Chiral surfaces: The many faces of chiral recognition

Current Opinion in Colloid & Interface Science, 2017
Abstract Molecular recognition is integral to many biological, synthetic, and supramolecular systems. Recognition is often the nexus that controls the path, kinetics, and mechanism of chemical and biochemical processes. Recognition can be static in the case of more rigid molecular environments, or dynamic in which either the selector, selector target,
John C. Lang, Daniel W. Armstrong
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Chiral Surfaces: Accomplishments and Challenges

ACS Nano, 2010
Chiral surfaces serve as media for enantioselective chemical processes. Their chirality is dictated by atomic- and molecular-level structure, and their enantioselectivity is determined by their enantiospecific interactions with chiral adsorbates. This Perspective describes three types of chiral metal surfaces: those modified by adsorption of chiral ...
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Mechanically generated surface chirality: Control of chiral strength

Applied Physics Letters, 2010
A substrate coated with an achiral polyimide alignment layer was scribed with the stylus of an atomic force microscope having a line-to-line force profile FAFBFCFAFBFC…. The strength of the resulting chiral surface was examined using the nematic liquid crystal electroclinic effect induced by the surface.
Sameh Ferjani, Joel Pendery, Charles Rosenblatt   +2 more
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