Surface conductivity induced by fullerenes on diamond: Passivation and thermal stability

Strobel, Paul; Ristein, J.; Ley, L.; Seppelt, K.; Goldt, Ilya V.; Boltalina, Olga V.

doi:10.1016/j.diamond.2005.10.034

Cited by 37 publications

(34 citation statements)

References 13 publications

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“…1 However the origin of the molecular species, acting as an acceptor, is unknown. In contrast, following predictions by previous theoretical calculations, 2,3 transfer doping between diamonds and C 60 and fluorinated C 60 have been observed 4 with the transfer effect due to fluorinated C 60 being substantially greater than that for C 60 alone. Predictions of charge transfer between diamond and other molecules 5 have been extended to other semiconducting or semimetallic systems as nanotubes 6 and graphene.…”

Section: Introductionsupporting

confidence: 69%

Doping of graphene: Density functional calculations of charge transfer between GaAs and carbon nanostructures

et al. 2008

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Density functional theory is used to show that charge transfer occurs between chemical dopants in GaAs and adsorbates composed of C 60 or graphene lying on the ͑110͒ surface of GaAs. In the case of C 60 , charge transfer only occurs for n-type GaAs, in agreement with previous experimental results. However, the calculations show that transfer between graphene and both n-and p-type GaAs can occur, which offers a simple way of doping graphene.

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Section: Introductionsupporting

confidence: 69%

Doping of graphene: Density functional calculations of charge transfer between GaAs and carbon nanostructures

et al. 2008

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“…Although diamond is a wide‐bandgap semiconductor (5.47 eV), the CH dipole on hydrogen‐terminated diamond decreases its ionization potential (IP) to 4.2 eV 2. 3 If diamond is exposed to a wet atmosphere,2, 10, 11 or if high‐electron‐affinity molecules such as tetrafluoro‐tetracyanoquinodimethane (F4‐TCNQ) are adsorbed on its surface,12, 13–15 electrons can be transferred from diamond to these adsorbates—provided the electron affinity of the adsorbates is higher than the ionization potential of diamond 16. This process generates a hole accumulation layer on the diamond surface, thus leading to p ‐type surface conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…Transfer doping of hydrogenated diamond surfaces by C 60 and fluorinated fullerenes was recently studied both experimentally and theoretically 13–15. 17–19 Although the electron affinity of isolated C 60 molecules is only 2.7 eV,20 theoretical cluster calculations17 and supercell formalism studies18 predict that C 60 is capable of extracting electrons from hydrogenated diamond surfaces.…”

Section: Introductionmentioning

confidence: 99%

Chemical Bonding of Fullerene and Fluorinated Fullerene on Bare and Hydrogenated Diamond

Ouyang

Wee

et al. 2008

ChemPhysChem

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We investigate the interface between a C(60) fullerite film, C(60)F(36), and diamond (100) by using core-level photoemission spectroscopy, cyclic voltammetry (CV), and high-resolution electron energy loss spectroscopy (HREELS). We show that C(60) can be covalently bonded to reconstructed C(100)-2x1 and that the bonded interface is sufficiently robust to exhibit characteristic C(60) redox peaks in solution. The bare diamond surface can be passivated against oxidation and hydrogenation by covalently bound C(60). However, C(60)F(36) is not as stable as C(60) and desorbs below 300 degrees C (the latter species being stable up to 500 degrees C on the diamond surface). Neither C(60) fullerite nor C(60)F(36) form reactive interfaces on the hydrogenated surface-they both desorb below 300 degrees C. The surface transfer doping process of hydrogenated diamond by C(60)F(36) is the most evident one among all the adsorbate systems studied (with a coverage-dependent band bending induced by C(60)F(36)).

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“…C 60 , exhibiting an electron affinity of 2.7 eV, has been identified as a promising candidate for well-controlled diamond transfer doping. 5,6 Despite the gap of 1.5 eV to the VBM of hydrogenated diamond, it has been shown first theoretically 7 and later experimentally, 5,8 that C 60 can, indeed, induce surface conductivity in hydrogenated diamond even in the absence of water. Inspired by this finding, efforts have been made to study the adsorption of fullerenes on hydrogenated diamond surfaces in more detail.…”

Section: Introductionmentioning

confidence: 99%

“…Inspired by this finding, efforts have been made to study the adsorption of fullerenes on hydrogenated diamond surfaces in more detail. 8,9 However, no study exists so far addressing the consequences of charge transfer doping on the C 60 island morphologies on hydrogenated diamond.…”

Section: Introductionmentioning

confidence: 99%

Influence of charge transfer doping on the morphologies of C60islands on hydrogenated diamond C(100)-(2×1)

et al. 2012

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The adsorption and island formation of C 60 fullerenes on the hydrogenated C(100)-(2 × 1):H diamond surface is studied using high-resolution noncontact atomic force microscopy in ultrahigh vacuum. At room temperature, C 60 fullerene molecules assemble into monolayer islands, exhibiting a hexagonally close-packed internal structure. Dewetting is observed when raising the substrate temperature above approximately 505 K, resulting in two-layer high islands. In contrast to the monolayer islands, these double-layer islands form extended wetting layers. This peculiar behavior is explained by an increased molecule-substrate binding energy in the case of double-layer islands, which originates from charge transfer doping. Only upon further increasing the substrate temperature to approximately 615 K, the wetting layer desorbs, corresponding to a binding energy of the charge transfer-stabilized film of 1.7 eV.

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Surface conductivity induced by fullerenes on diamond: Passivation and thermal stability

Cited by 37 publications

References 13 publications

Doping of graphene: Density functional calculations of charge transfer between GaAs and carbon nanostructures

Doping of graphene: Density functional calculations of charge transfer between GaAs and carbon nanostructures

Chemical Bonding of Fullerene and Fluorinated Fullerene on Bare and Hydrogenated Diamond

Influence of charge transfer doping on the morphologies of C60islands on hydrogenated diamond C(100)-(2×1)

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