Surface superstructures in highly oriented pyrolytic graphite surfaces after Ar+ bombardment

López, Juan Carlos Moreno; Passeggi, M. C. G.; Ferrón, J.

doi:10.1016/j.susc.2007.10.030

Cited by 18 publications

(12 citation statements)

References 28 publications

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“…STM reveals that defects come in a variety of shapes and sizes. Some are similar to single-atom vacancies with threefold symmetry [29][30][31] [Figs. 1(a) and 1(b)].…”

Section: A Characteristics Of Graphite Surfaces: General Commentsmentioning

confidence: 99%

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Search for encapsulation of platinum, silver, and gold at the surface of graphite

Lii-Rosales

Han

Jing

et al. 2020

Phys. Rev. Research

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Using scanning tunneling microscopy, we show that Pt clusters can be encapsulated beneath the surface of graphite, whereas Ag and Au cannot. This is in complete agreement with independent predictions from density functional theory, which show that surface intercalation of single metal atoms is favorable for Pt, but unfavorable for Ag and Au. This supports the validity of using single-metal-atom energetics for predicting encapsulation of metal nanoparticles at the graphite surface. We also demonstrate that the optimal temperature for encapsulation scales with the cohesive energy of the metal.

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“…STM reveals that defects come in a variety of shapes and sizes. Some are similar to single-atom vacancies with threefold symmetry [29][30][31] [Figs. 1(a) and 1(b)].…”

Section: A Characteristics Of Graphite Surfaces: General Commentsmentioning

confidence: 99%

“…1(a) and 1(b)]. Other types presumably include multiatom vacancies and interstitial C atoms that are displaced within the graphite gallery (the space between graphene layers) as a result of ion bombardment [31][32][33] [8,10].…”

Section: A Characteristics Of Graphite Surfaces: General Commentsmentioning

confidence: 99%

Search for encapsulation of platinum, silver, and gold at the surface of graphite

Lii-Rosales

Han

Jing

et al. 2020

Phys. Rev. Research

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“…[9,39,43,44] Other types of features presumably correspond to more complex surface damage, e.g., multiple atom vacancies, interstitial carbon, and/or lattice distortion. [43,45,46] Surrounding the defects are regions of HOPG that exhibit a (√3×√3)R30 o superlattice, highlighted by the rhombus in Fig. 1(f).…”

Section: Characterization Of Clean Graphite Surfacesmentioning

confidence: 99%

Formation of Multilayer Cu Islands Embedded beneath the Surface of Graphite: Characterization and Fundamental Insights

et al. 2018

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We present an extensive experimental study of the conditions under which Cu forms encapsulated islands under the top surface layers of graphite, as a result of physical vapor deposition of Cu on argon-ionbombarded graphite. When the substrate is held at 800 K during deposition, conditions are optimal for formation of encapsulated multilayer Cu islands. Deposition temperatures below 600 K favor adsorbed Cu clusters, while deposition temperatures above 800 K favor a different type of feature that is probably a singlelayer intercalated Cu island. The multilayer Cu islands are characterized with respect to size and shape, thickness and continuity of the graphitic overlayer, relationship to graphite steps, and stability in air. The experimental techniques are scanning tunneling microscopy and X-ray photoelectron spectroscopy. We also present an extensive study using density functional theory to compare stabilities of a wide variety of configurations of Cu atoms, Cu clusters, and Cu layers on/under the graphite surface. The only configuration that is significantly more stable under the graphite surface than on top of it, is a single Cu atom. This analysis leads us to conclude that formation of encapsulated Cu islands is kinetically driven, rather than thermodynamically driven.

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“…Oxidation of carbon materials is a topic of scientific and technological relevance [6,[8][9][10][11][12][13], and can be carried out through a variety of approaches. Thus, carbon surfaces can be oxidized via high temperature treatment under air or molecular oxygen [9,14], through oxygen ion bombardment [15][16][17][18], by exposure to oxygen-containing plasmas [10,11,19,20] or ozone [21,22], or by wet chemical and electrochemical means [23].…”

Section: Introductionmentioning

confidence: 99%

A comparison between physically and chemically driven etching in the oxidation of graphite surfaces

Solís‐Fernández

Paredes

Cosío

et al. 2010

Journal of Colloid and Interface Science

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Surface superstructures in highly oriented pyrolytic graphite surfaces after Ar+ bombardment

Cited by 18 publications

References 28 publications

Search for encapsulation of platinum, silver, and gold at the surface of graphite

Search for encapsulation of platinum, silver, and gold at the surface of graphite

Formation of Multilayer Cu Islands Embedded beneath the Surface of Graphite: Characterization and Fundamental Insights

A comparison between physically and chemically driven etching in the oxidation of graphite surfaces

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