Interface interaction of transition metal phthalocyanines with strontium titanate (100)

• Reimer Karstens,
• Thomas Chassé and
• Heiko Peisert

Beilstein J. Nanotechnol. 2021, 12, 485–496, doi:10.3762/bjnano.12.39

• transfer with the oxide substrate was observed, involving both the macrocycle and the central metal atom. For molecules of the first monolayer, an electron transfer to the central metal atom is concluded from transition metal 2p core level photoemission spectra. The number of interacting molecules in the

• of CoPcFx and FePcFx (x = 0 or 16) on niobium-doped STO(100) surfaces. For all molecules, different shifts of core level photoemission peaks with overlayer thickness were observed, indicating a charge transfer from the macrocycle to the substrate. For a distinct number of molecules of the first

Ta₂N₃ nanocrystals grown in Al₂O₃ thin layers

• Krešimir Salamon,
• Maja Buljan,
• Iva Šarić,
• Mladen Petravić and
• Sigrid Bernstorff

Beilstein J. Nanotechnol. 2017, 8, 2162–2170, doi:10.3762/bjnano.8.215

• 4p or N 1s core levels. We focus our XPS measurements on the Ta 4f photoemission, which shows a more distinctive structure and larger chemical shifts than the emissions from the Ta 4p and N 1s levels [30][31]. As an example, we show in Figure 5 the Ta 4f core level photoemission spectra taken from

Charge transfer from and to manganese phthalocyanine: bulk materials and interfaces

• Florian Rückerl,
• Daniel Waas,
• Bernd Büchner,
• Martin Knupfer,
• Dietrich R. T. Zahn,
• Francisc Haidu,
• Torsten Hahn and
• Jens Kortus

Beilstein J. Nanotechnol. 2017, 8, 1601–1615, doi:10.3762/bjnano.8.160

• structure has its origin in the fact that the phthalocyanine ring consists of carbon atoms with different chemical environments, namely those with nitrogen as neighbors and those without. This is clearly seen in corresponding C 1s core-level photoemission data [74][81][82], in which the binding energy for

• ultra-high vacuum. The doping level of the films was determined by analyzing the relative intensities of the core level photoemission from the C 1s and the K 2p core levels [49]. In Figure 4 we summarize the results of PES and IPES data that could be obtained for compositions close to the KxMnPc phases

• phthalocyanine molecule is oxidized. Since the leading orbital in pure MnPc (SOMO) is a hybrid state of Mn 3d and ligand π orbitals with a large Mn 3d contribution [22][84][109], this oxidation is also clearly seen in core-level photoemission from MnPc 2p core level states as depicted in Figure 6. This figure

X-ray photoelectron spectroscopy of graphitic carbon nanomaterials doped with heteroatoms

• Toma Susi,
• Thomas Pichler and
• Paola Ayala

Beilstein J. Nanotechnol. 2015, 6, 177–192, doi:10.3762/bjnano.6.17

• nanomaterials, and a reference for their binding energies that are vital for compositional analysis via XPS. Keywords: carbon nanotubes; core level photoemission; graphene; substitutional doping; X-ray photoelectron spectroscopy (XPS); Introduction Graphitic carbon nanomaterials consist of carbon bonded via

• discovered in 1985 by Kroto et al. [1]. The core level photoemission response of C60 is well described by a Voigtian centered at 285.2 eV, with a FWHM of the Lorentzian component measured at 0.11 eV [83]. Heteroatom doping After these important considerations of the pristine structures, we turn to our main

CoPc and CoPcF₁₆ on gold: Site-specific charge-transfer processes

• Fotini Petraki,
• Heiko Peisert,
• Johannes Uihlein,
• Umut Aygül and
• Thomas Chassé

Beilstein J. Nanotechnol. 2014, 5, 524–531, doi:10.3762/bjnano.5.61

• source BESSY II (Berlin) by using the Optics-beamline and the end-station SurICat. XAS spectra were acquired in total-electron yield (TEY) mode. CoPcF16 on polycrystalline (poly-) Au: Co 2p core-level photoemission spectra (XPS, Al Kα) with increasing CoPcF16 film thickness on gold foil. CoPcF16 on

• spectra as a function of the film thickness for CoPcF16 and CoPc on polycrystalline Au. The observed shift is attributed to the formation of an interfacial dipole Δ. Supporting Information Supporting Information File 34: Co 2p core-level photoemission spectra. Acknowledgements The work was supported by

Thermal stability and reduction of iron oxide nanowires at moderate temperatures

• Annalisa Paolone,
• Marco Angelucci,
• Stefania Panero,
• Maria Grazia Betti and
• Carlo Mariani

Beilstein J. Nanotechnol. 2014, 5, 323–328, doi:10.3762/bjnano.5.36

• . Thermogravimetry measurements distinctly show the mass reduction due to oxygen loss, and infrared transmittance and core-level photoemission measurements allow to follow the reduction process of the iron ions at different temperatures, showing the chemical reduction to Fe3O4 starting at moderate temperatures