H2Pc and pentacene on Cu(110)-(2×1)O: A combined STM and nc-AFM study

Garlant, Angel; Maughan, Bret; Zahl, Percy; Monti, Oliver L. A.

doi:10.1016/j.susc.2020.121590

Cited by 4 publications

(3 citation statements)

References 37 publications

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“…10,15−18 Usually, the deposition of Pn on flat surfaces results in multidomain formations, which is not very useful from a point of view of potential applications, although attempts with anisotropic surface reconstruction have also been made. 19,20 To improve the ordering of Pn molecules, various vicinal (stepped) surfaces, mainly metallic, have been utilized. It is known that step edges act as nucleation centers for growing structures; thus, the presence of monatomic steps can improve the ordering of molecules, as it has been demonstrated many times for metallic vicinal surfaces.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In many cases, the intermolecular forces, which determine the bulk structure of molecules, are very different from those acting on molecules adsorbed on a flat surface. Indeed, in the bulk phase, Pn has a layered herringbone structure, while single layers of Pn can adsorb flat on strongly interacting surfaces or stand up as deposited on weakly interacting surfaces. ,− Usually, the deposition of Pn on flat surfaces results in multidomain formations, which is not very useful from a point of view of potential applications, although attempts with anisotropic surface reconstruction have also been made. , …”

Section: Introductionmentioning

confidence: 99%

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Template Driven Self-Assembly of the Pentacene Structure on the Si(553)-Pb Surface

et al. 2022

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The self-assembly of the pentacene molecules on the Pb-ordered Si(553) surface is studied with scanning tunneling microscopy and density functional theory methods. Within the surface coverage up to a single monolayer, pentacene was found to form two different chain-like structures. They vary in molecular density, but both exhibit long-range, one-dimensional ordering with longer molecular axes aligned along step edges. The low-density phase consists of single discontinuous molecular rows and adapts the template surface periodicity, while the high-density phase features triple molecular chains with the unit cell determined by the length of the pentacene molecules. Such an arrangement of the molecules is controlled by a subtle balance between molecule–molecule and molecule–substrate interactions.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Template Driven Self-Assembly of the Pentacene Structure on the Si(553)-Pb Surface

et al. 2022

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“…In real space, orbital-related information can be obtained with scanning tunneling microscopy (STM) [5][6][7][8][9][10] , which images the spatially resolved local density of states near the Fermi level 11 . In addition, HR-AFM with molecularly functionalized tips has been used for quantitative structural measurements on organic molecules with spectacular atomic resolution 12,13 . Bond order 14,15 and heteroatom 16,17 discrimination, and even real-space imaging of individual atoms 18,19 and intermolecular bonds have been reported 20,21 .…”

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confidence: 99%

Observation of electron orbital signatures of single atoms within metal-phthalocyanines using atomic force microscopy

et al. 2023

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Resolving the electronic structure of a single atom within a molecule is of fundamental importance for understanding and predicting chemical and physical properties of functional molecules such as molecular catalysts. However, the observation of the orbital signature of an individual atom is challenging. We report here the direct identification of two adjacent transition-metal atoms, Fe and Co, within phthalocyanine molecules using high-resolution noncontact atomic force microscopy (HR-AFM). HR-AFM imaging reveals that the Co atom is brighter and presents four distinct lobes on the horizontal plane whereas the Fe atom displays a “square” morphology. Pico-force spectroscopy measurements show a larger repulsion force of about 5 pN on the tip exerted by Co in comparison to Fe. Our combined experimental and theoretical results demonstrate that both the distinguishable features in AFM images and the variation in the measured forces arise from Co’s higher electron orbital occupation above the molecular plane. The ability to directly observe orbital signatures using HR-AFM should provide a promising approach to characterizing the electronic structure of an individual atom in a molecular species and to understand mechanisms of certain chemical reactions.

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Adsorption and reaction of an alkyne molecule on diverse oxygen-reconstructed Cu(110) surfaces

Han

et al. 2022

Surface Science

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H2Pc and pentacene on Cu(110)-(2×1)O: A combined STM and nc-AFM study

Cited by 4 publications

References 37 publications

Template Driven Self-Assembly of the Pentacene Structure on the Si(553)-Pb Surface

Template Driven Self-Assembly of the Pentacene Structure on the Si(553)-Pb Surface

Observation of electron orbital signatures of single atoms within metal-phthalocyanines using atomic force microscopy

Adsorption and reaction of an alkyne molecule on diverse oxygen-reconstructed Cu(110) surfaces

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