Self-Assembled Structures of Glycine on Cu(111)

Zhao, Xueying; Yan, Hao; Zhao, and R. G.; Yang, Weishen

doi:10.1021/la0267037

Cited by 43 publications

(73 citation statements)

References 27 publications

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“…The calculations also indicate that the heterochiral (3×2) adlayer is more stable than the homochiral (3×2) one: the predicted adsorption energy is -2.82 eV for the former and -2.76 eV for the latter. This results indicated that large regions of the homochiral (3×2) glycine adlayer are unlikely to exist on Cu (110), in agreement with the conclusions of refs. [66; 173] .…”

Section: Glycine Adsorption At Cu Surfacessupporting

confidence: 92%

“…The centred (3×2) structure with two molecules per unit cell results from a compromise between optimal adsorbate site, intermolecular hydrogen bonding and maximum adsorbate density. The threefold and twofold periodicities along the <-110> and <001> directions, respectively, lead to an almost square unit cell; this structure is quite common for small -amino acids on Cu (110), since the molecules are bound to the surface through the AA functional groups and let the radical tail protrude far from the surface. The corresponding STM analysis of the (3×2)g-Gly/Cu(110) overlayer showed both homochiral and heterochiral domains at the surface [101].…”

Section: Glycine Adsorption At Cu Surfacesmentioning

confidence: 99%

“…This means that the stable gas-phase conformation of glycine does not have a mirror plane, so it might formally be considered chiral in that its mirror image is not superimposable on itself; however, the energy barrier for interconversion of the two enantiomers is low, and racemization easily occurs at room temperature. This barrier is raised dramatically upon strong chemisorption on a metal surface, such as Cu (110), and this effect causes the chemisorbed species to become efficiently chiral. This is a general phenomenon, which applies to any molecule which loses all mirror planes on chemisorption.…”

Section: Glycine Adsorption At Cu Surfacesmentioning

confidence: 99%

“…The adsorption of glycine on Cu(111) was investigated in parallel to the Gly/Cu(100) system, and was then reconsidered in the very recent years. STM experiments [110] showed that, upon Gly deposition at RT (and possibly further annealing to 400 K) different structures form depending on coverage and deposition rate. At low  the adsorbate forms a 2D gas phase in which the molecules are oriented broadly perpendicular to the surface.…”

Section: Glycine Adsorption At Cu Surfacesmentioning

confidence: 99%

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Adsorption and self-assembly of bio-organic molecules at model surfaces: A route towards increased complexity

Costa

Pradier

Tielens

et al. 2015

Surface Science Reports

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Understanding the bio-physical-chemical interactions at nanostructured biointerfaces and the assembling mechanisms of so-called hybrid nano-composites is nowadays a keyissue for nanoscience in view of the many possible applications foreseen. The contribution of surface science in this field is noteworthy since, using a bottom-up approach, it allows the investigation of the fundamental processes at the basis of complex interfacial phenomena and thus it helps to unravelthe elementary mechanisms governing them. Nowadays it is well demonstrated that a wide variety of different molecular assemblies can form upon adsorption of small biomolecules at surfaces. The geometry of such self-organized structures can often be tuned by a careful control of the experimental conditions during the deposition process. Indeed an impressive number of studies exist (both experimental and -to a lesser extendtheoretical), which demonstrate the ability of molecular self-assembly to create different structural motifs in a more or less predictable manner, by tuning the molecular building blocks as well as the metallic substrate. In this frame, amino acidsand small peptides at surfaces are key, basic, systems to be studied. The amino acidsstructure is simple enough to serve as a model for the chemisorption of biofunctional molecules, but their adsorption at surfaces has applications in surface functionalization, in enantiospecific catalysis, biosensing, nanoparticles shape control or in emerging fields such as "green" corrosion inhibition. In this paper we review the most recent advancements in this field. We will start from amino acids adsorption at metal surfaces and we will evolve then in the direction of more complex systems, in thelight of the latest improvements of surface science techniques and of computational methods. On one side, we will focus on amino acids adsorption at oxide surfaces, on the other on peptide adsorption both at metal and oxide substrates. Particular attention will be drawn to the added value provided by the combination of several experimental surface science techniques and to the precious contribution of advanced complementary computational methods to resolve the details of systems of increased complexity. Finally, some hints into experiments performed in the presence of water and then characterized in UHV and in the related theoretical work will be presented. This is a further step towards abetter approximation of real biological systems. However, since the methods employed are often not typical of surface science, this topic is not developed in details.2

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Section: Glycine Adsorption At Cu Surfacessupporting

confidence: 92%

Section: Glycine Adsorption At Cu Surfacesmentioning

confidence: 99%

Section: Glycine Adsorption At Cu Surfacesmentioning

confidence: 99%

Section: Glycine Adsorption At Cu Surfacesmentioning

confidence: 99%

See 2 more Smart Citations

Adsorption and self-assembly of bio-organic molecules at model surfaces: A route towards increased complexity

Costa

Pradier

Tielens

et al. 2015

Surface Science Reports

View full text Add to dashboard Cite

show abstract

“…In all three of these cases, the acid is deprotonated by interaction with the Cu surface to form, respectively, glycinate (NH 2 CH 2 COO) and alaninate (NH 2 CH 3 CHCOO) species that bond to the surface through both of the carboxylate O atoms and the amino N atom, all three atoms occupying single-coordinated sites. This bonding configuration is consistent with a number of studies using electronic [7,8] and vibrational spectroscopy [9,10,11], and also scanning tunnelling microscopy [12,13,14,15,16,17] and density functional theory (DFT) calculations [18,19]. Some of these spectroscopic studies, however, do indicate that at different surface coverages, or in less well-ordered overlayers, other chemisorption bonding configurations probably occur involving only one or both of the carboxylate O atoms.…”

Section: Introductionsupporting

confidence: 86%