Search results

Search for "X-ray photoelectron spectroscopy (XPS)" in Full Text gives 254 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Patterning of supported gold monolayers via chemical lift-off lithography

  • Liane S. Slaughter,
  • Kevin M. Cheung,
  • Sami Kaappa,
  • Huan H. Cao,
  • Qing Yang,
  • Thomas D. Young,
  • Andrew C. Serino,
  • Sami Malola,
  • Jana M. Olson,
  • Stephan Link,
  • Hannu Häkkinen,
  • Anne M. Andrews and
  • Paul S. Weiss

Beilstein J. Nanotechnol. 2017, 8, 2648–2661, doi:10.3762/bjnano.8.265

Graphical Abstract
  • useful properties [14][15][16][17][18]. Here, we have investigated Au–alkanethiolate layers on PDMS that were produced during CLL specifically for their 2D material properties. The existence of Au on the PDMS stamp following lift-off was initially discovered using X-ray photoelectron spectroscopy (XPS
  • on the Au-on-Si substrate, from which Au complexes were removed, appeared as recessed circles, demonstrating that lift-off occurred in a chemically selective manner. The X-ray photoelectron spectroscopy (XPS) spectra of patterned PDMS illustrated the presence of Au in the regions predominantly
PDF
Album
Supp Info
Full Research Paper
Published 08 Dec 2017

Amplified cross-linking efficiency of self-assembled monolayers through targeted dissociative electron attachment for the production of carbon nanomembranes

  • Sascha Koch,
  • Christopher D. Kaiser,
  • Paul Penner,
  • Michael Barclay,
  • Lena Frommeyer,
  • Daniel Emmrich,
  • Patrick Stohmann,
  • Tarek Abu-Husein,
  • Andreas Terfort,
  • D. Howard Fairbrother,
  • Oddur Ingólfsson and
  • Armin Gölzhäuser

Beilstein J. Nanotechnol. 2017, 8, 2562–2571, doi:10.3762/bjnano.8.256

Graphical Abstract
  • 50 eV. Cross-linking of the molecular layers and the formation of mechanically stable carbon nanomembranes (CNMs) was then monitored through X-ray photoelectron spectroscopy (XPS) during the irradiation process. This enables the transition of the SAMs into CNMs to be observed and allows the
  • approximately 1:0.7:0.6. Inspired by these results, self-assembled monolayers (SAMs) of the respective biphenyl-4-thiols, 2-Cl-BPT, 2-Br-BPT, 2-I-BPT as well as BPT, were grown on a Au(111) substrate and exposed to 50 eV electrons. The effect of electron irradiation was investigated by X-ray photoelectron
  • spectroscopy (XPS), to determine whether the high relative DEA cross section for iodide loss from 2-I-BPT as compared to 2-Br-BP and 2-Cl-BP is reflected in the cross-linking efficiency of SAMs made from these materials. Such sensitization could reduce the electron dose needed for the cross-linking process and
PDF
Album
Full Research Paper
Published 30 Nov 2017

Synthesis of metal-fluoride nanoparticles supported on thermally reduced graphite oxide

  • Alexa Schmitz,
  • Kai Schütte,
  • Vesko Ilievski,
  • Juri Barthel,
  • Laura Burk,
  • Rolf Mülhaupt,
  • Junpei Yue,
  • Bernd Smarsly and
  • Christoph Janiak

Beilstein J. Nanotechnol. 2017, 8, 2474–2483, doi:10.3762/bjnano.8.247

Graphical Abstract
  • identified by powder X-ray diffraction (PXRD) to be MF2 for M = Fe, Co and MF3 for M = Eu, Pr. The diameters and size distributions of MFx@TRGO were from (6 ± 2) to (102 ± 41) nm. Energy-dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS) were used for further characterization of
  • analyses see Supporting Information File 1 (Figures S1–S3, Tables S1–S7). X-ray photoelectron spectroscopy, XPS-(ESCA), measurements were performed with a Fisons/VG Scientific ESCALAB 200X spectrometer, operating at room temperature at a pressure of 1.0 × 10−8 bar and a sample angle of 30°. Spectra were
PDF
Album
Supp Info
Full Research Paper
Published 22 Nov 2017

Au nanostructure fabrication by pulsed laser deposition in open air: Influence of the deposition geometry

  • Rumen G. Nikov,
  • Anna Og. Dikovska,
  • Nikolay N. Nedyalkov,
  • Georgi V. Avdeev and
  • Petar A. Atanasov

Beilstein J. Nanotechnol. 2017, 8, 2438–2445, doi:10.3762/bjnano.8.242

Graphical Abstract
  • ). Goniometric scans for phase identification were recorded in the 2θ interval of 20–80° using a Philips PW 1050 diffractometer equipped with a Cu Kα tube and a scintillation detector. The composition of the material deposited on the substrate was determined by X-ray photoelectron spectroscopy (XPS) by means of
PDF
Album
Full Research Paper
Published 17 Nov 2017

Fabrication of CeO2–MOx (M = Cu, Co, Ni) composite yolk–shell nanospheres with enhanced catalytic properties for CO oxidation

  • Ling Liu,
  • Jingjing Shi,
  • Hongxia Cao,
  • Ruiyu Wang and
  • Ziwu Liu

Beilstein J. Nanotechnol. 2017, 8, 2425–2437, doi:10.3762/bjnano.8.241

Graphical Abstract
  • CeO2–NiO, generate more surface oxygen vacancies than pure CeO2. In order to obtain detailed information about the chemical bonding states of the as-prepared CeO2–MOx yolk-shell nanospheres, X-ray photoelectron spectroscopy (XPS) analyses were carried out and the results are shown in Figure 7. As shown
  • laser of 532 nm. Surface analysis was obtained by an X-ray photoelectron spectroscopy (XPS, Thermo ESCALAB 250Xi) with Al Kα radiation. All binding energies were corrected for surface charging by use of the C 1s peak (284.8 eV) of adventitious carbon as reference. The M contents in CeO2–MOx samples were
PDF
Album
Full Research Paper
Published 16 Nov 2017

Comprehensive investigation of the electronic excitation of W(CO)6 by photoabsorption and theoretical analysis in the energy region from 3.9 to 10.8 eV

  • Mónica Mendes,
  • Khrystyna Regeta,
  • Filipe Ferreira da Silva,
  • Nykola C. Jones,
  • Søren Vrønning Hoffmann,
  • Gustavo García,
  • Chantal Daniel and
  • Paulo Limão-Vieira

Beilstein J. Nanotechnol. 2017, 8, 2208–2218, doi:10.3762/bjnano.8.220

Graphical Abstract
  • ]. Nanometre-thick films of surface-adsorbed W(CO)6 irradiated at 500 eV electron impact energy were analysed in situ by X-ray photoelectron spectroscopy (XPS), mass spectrometry and reflective absorption infrared spectroscopy (RAIRS) measurements [23]. These studies on electron-stimulated reactions of surface
PDF
Album
Supp Info
Full Research Paper
Published 23 Oct 2017

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

Graphical Abstract
  • magnetron deposition at room temperature and characterized using grazing incidence small-angle X-ray scattering (GISAXS), X-ray reflectivity (XRR), grazing incidence X-ray diffraction (GIXRD), secondary ion mass spectrometry (SIMS) and X-ray photoelectron spectroscopy (XPS). We found amorphous tantalum
  • spectrometry (SIMS) and X-ray photoelectron spectroscopy (XPS). Experimental The films were grown as periodic multilayers by using the magnetron sputter deposition system KJLC CMS-18. In order to obtain tantalum nitride, the depositions were carried out in a reactive atmosphere containing 20% N2 and 80% Ar
PDF
Album
Supp Info
Full Research Paper
Published 16 Oct 2017

Imidazolium-based ionic liquids used as additives in the nanolubrication of silicon surfaces

  • Patrícia M. Amorim,
  • Ana M. Ferraria,
  • Rogério Colaço,
  • Luís C. Branco and
  • Benilde Saramago

Beilstein J. Nanotechnol. 2017, 8, 1961–1971, doi:10.3762/bjnano.8.197

Graphical Abstract
  • force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS), respectively. Due to the hygroscopic properties of PEG, the first step was to assess the effect of the presence of water. Then, a series of ILs based on the cations 1-ethyl-3-methylimidazolium [EMIM], 1-butyl-3-methylimidazolium [BMIM
  • topography and chemical composition of the substrates surfaces were determined with atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS), respectively. Correlations between the obtained friction coefficients and the surface properties as well as the lubricants viscosity were attempted in
PDF
Album
Full Research Paper
Published 20 Sep 2017

Intercalation of Si between MoS2 layers

  • Rik van Bremen,
  • Qirong Yao,
  • Soumya Banerjee,
  • Deniz Cakir,
  • Nuri Oncel and
  • Harold J. W. Zandvliet

Beilstein J. Nanotechnol. 2017, 8, 1952–1960, doi:10.3762/bjnano.8.196

Graphical Abstract
  • tunnel current is fed into the lock-in amplifier. The output signal of the lock-in amplifier, which is proportional to dI/dz, is measured simultaneously with the topography. MoS2 samples used for the X-ray photoelectron spectroscopy (XPS) experiments were purchased from nanoScience Instruments. The MoS2
  • photoelectron spectroscopy (XPS) [31]. It should be pointed out here that this study showed that the S 2p3/2 peak in MoS2 is at around 167.6 eV, which is considerably higher than the pure core-level line of pure S. This high value might be an indication of contamination with O [32] or Ni [33]. Here we revisit
  • al. [30] deposited Si on MoS2 and found that Si forms an epitaxially strained layer on top of MoS2 with a lattice constant identical to the MoS2 lattice constant, i.e., 3.16 Å. A study confirming the two-dimensionality of deposited Si on MoS2 has recently been carried out using variable-angle X-ray
PDF
Album
Supp Info
Full Research Paper
Published 19 Sep 2017

Application of visible-light photosensitization to form alkyl-radical-derived thin films on gold

  • Rashanique D. Quarels,
  • Xianglin Zhai,
  • Neepa Kuruppu,
  • Jenny K. Hedlund,
  • Ashley A. Ellsworth,
  • Amy V. Walker,
  • Jayne C. Garno and
  • Justin R. Ragains

Beilstein J. Nanotechnol. 2017, 8, 1863–1877, doi:10.3762/bjnano.8.187

Graphical Abstract
  • irradiation all proved necessary for the deposition of robust films that could survive nanoshaving. In addition to characterizations with AFM, grazing angle infrared reflectance–absorbance spectroscopy (IRRAS), X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (TOF SIMS
  • instrument (AST Products, Inc.). Two µL of deionized water were deposited on the top of each sample in the horizontal position. At least six measurements were calculated for each sample using VCA Optima software. X-ray photoelectron spectroscopy (XPS): Photoelectron spectra were obtained using a PHI 5000
PDF
Album
Supp Info
Full Research Paper
Published 06 Sep 2017

(Metallo)porphyrins for potential materials science applications

  • Lars Smykalla,
  • Carola Mende,
  • Michael Fronk,
  • Pablo F. Siles,
  • Michael Hietschold,
  • Georgeta Salvan,
  • Dietrich R. T. Zahn,
  • Oliver G. Schmidt,
  • Tobias Rüffer and
  • Heinrich Lang

Beilstein J. Nanotechnol. 2017, 8, 1786–1800, doi:10.3762/bjnano.8.180

Graphical Abstract
  • temperature. X-ray photoelectron spectroscopy (XPS) measurements indicated that after initial deposition not all CuTPP(Br)8 molecules remained intact (Figure 11, left column). Likely, some molecules partially debrominate during OMBD in the crucible or when arriving with high thermal energy on the Au(111
PDF
Album
Review
Published 29 Aug 2017

Methionine-mediated synthesis of magnetic nanoparticles and functionalization with gold quantum dots for theranostic applications

  • Arūnas Jagminas,
  • Agnė Mikalauskaitė,
  • Vitalijus Karabanovas and
  • Jūrate Vaičiūnienė

Beilstein J. Nanotechnol. 2017, 8, 1734–1741, doi:10.3762/bjnano.8.174

Graphical Abstract
  • spectroscopy, inductively coupled plasma mass spectroscopy (ICP-MS), and X-ray photoelectron spectroscopy (XPS) of as-formed CoFe2O4 NPs before and after decoration with gold QDs were applied. Keywords: functionalization; gold; magnetic nanoparticles; quantum dots; theranostics; Introduction In current
  • cobalt ferrite NPs was also investigated using X-ray photoelectron spectroscopy (XPS). The surface chemical composition of the CoFe2O4@Met–Au NPs is presented in Table 1, whereas the typical core-level spectrum of the deposited gold is presented in Figure 5. As shown, the main Au 4f7/2 photoelectron peak
PDF
Album
Full Research Paper
Published 22 Aug 2017

Effect of the fluorination technique on the surface-fluorination patterning of double-walled carbon nanotubes

  • Lyubov G. Bulusheva,
  • Yuliya V. Fedoseeva,
  • Emmanuel Flahaut,
  • Jérémy Rio,
  • Christopher P. Ewels,
  • Victor O. Koroteev,
  • Gregory Van Lier,
  • Denis V. Vyalikh and
  • Alexander V. Okotrub

Beilstein J. Nanotechnol. 2017, 8, 1688–1698, doi:10.3762/bjnano.8.169

Graphical Abstract
  • structure (NEXAFS) spectra, which showed substantial differences for the samples prepared using elemental F2 at elevated temperature, BrF3 at room temperature, and CF4 rf plasma. Infrared (IR) spectroscopy and X-ray photoelectron spectroscopy (XPS) are invoked to support the proposed fluorine distributions
PDF
Album
Supp Info
Full Research Paper
Published 15 Aug 2017

Near-infrared-responsive, superparamagnetic Au@Co nanochains

  • Varadee Vittur,
  • Arati G. Kolhatkar,
  • Shreya Shah,
  • Irene Rusakova,
  • Dmitri Litvinov and
  • T. Randall Lee

Beilstein J. Nanotechnol. 2017, 8, 1680–1687, doi:10.3762/bjnano.8.168

Graphical Abstract
  • electron diffraction (SAED) shown in the inset is also consistent with a single-phase fcc structure [36]. The chemical composition of the bimetallic nanochains was evaluated by energy dispersive X-ray spectroscopy (EDX) and X-ray photoelectron spectroscopy (XPS). Figure 4 shows the EDX spectrum with peaks
PDF
Album
Full Research Paper
Published 14 Aug 2017

Group-13 and group-15 doping of germanane

  • Nicholas D. Cultrara,
  • Maxx Q. Arguilla,
  • Shishi Jiang,
  • Chuanchuan Sun,
  • Michael R. Scudder,
  • R. Dominic Ross and
  • Joshua E. Goldberger

Beilstein J. Nanotechnol. 2017, 8, 1642–1648, doi:10.3762/bjnano.8.164

Graphical Abstract
  • are retained on the germanane lattice after topotactic deintercalation. Using X-ray fluorescence (XRF) and X-ray photoelectron spectroscopy (XPS) we show that up to 1.1% and 2.3% of As and Ga, respectively, can be substituted onto the germanane lattice. In contrast to pristine GeH, these materials
PDF
Album
Full Research Paper
Published 09 Aug 2017

Surface functionalization of 3D-printed plastics via initiated chemical vapor deposition

  • Christine Cheng and
  • Malancha Gupta

Beilstein J. Nanotechnol. 2017, 8, 1629–1636, doi:10.3762/bjnano.8.162

Graphical Abstract
  • diacrylate)) (P(HEMA-co-EGDA)) [30] onto 3D objects of a variety of shapes and sizes to study the capabilities and limitations of the iCVD process. X-ray photoelectron spectroscopy (XPS) and contact angle goniometry were used to study the surface properties before and after coating. Results and Discussion A
  • vinyl bonds were completely reacted. Additionally, the presence of PPFDA at the top of the lattice was verified using X-ray photoelectron spectroscopy (XPS) to analyze the chemical composition of the surface (Figure 2c). The survey spectrum of the top of the PPFDA-coated lattice had atomic percentages
PDF
Album
Full Research Paper
Published 08 Aug 2017

Two-dimensional carbon-based nanocomposites for photocatalytic energy generation and environmental remediation applications

  • Suneel Kumar,
  • Ashish Kumar,
  • Ashish Bahuguna,
  • Vipul Sharma and
  • Venkata Krishnan

Beilstein J. Nanotechnol. 2017, 8, 1571–1600, doi:10.3762/bjnano.8.159

Graphical Abstract
PDF
Album
Review
Published 03 Aug 2017

Deposition of exchange-coupled dinickel complexes on gold substrates utilizing ambidentate mercapto-carboxylato ligands

  • Martin Börner,
  • Laura Blömer,
  • Marcus Kischel,
  • Peter Richter,
  • Georgeta Salvan,
  • Dietrich R. T. Zahn,
  • Pablo F. Siles,
  • Maria E. N. Fuentes,
  • Carlos C. B. Bufon,
  • Daniel Grimm,
  • Oliver G. Schmidt,
  • Daniel Breite,
  • Bernd Abel and
  • Berthold Kersting

Beilstein J. Nanotechnol. 2017, 8, 1375–1387, doi:10.3762/bjnano.8.139

Graphical Abstract
  • photoelectron spectroscopy (XPS) and scanning tunneling microscopy (STM) measurements [41]. The present study is an extension of this work and focuses on the synthesis, characterization and deposition of dinuclear [Ni2L(L’)](ClO4) complexes 6–8 bearing the ambidentate coligands H2L4–H2L6 (Figure 1, Scheme 2
  • “auration” of 2 and 3 with AuI sources leads to the trinuclear NiII2AuI species 4 and 5. Moreover, complexes 2 and 3 interact also with Au surfaces via Au–S and Au–P bonds without complex disintegration as established by contact angle, spectroscopic ellipsometry, atomic force microscopy (AFM), X-ray
PDF
Album
Supp Info
Full Research Paper
Published 05 Jul 2017

Oxidative chemical vapor deposition of polyaniline thin films

  • Yuriy Y. Smolin,
  • Masoud Soroush and
  • Kenneth K. S. Lau

Beilstein J. Nanotechnol. 2017, 8, 1266–1276, doi:10.3762/bjnano.8.128

Graphical Abstract
  • pentachloride as oxidant. Microscopy and spectroscopy indicate that oCVD processing conditions influence the PANI film chemistry, oxidation, and doping level. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) indicate that a substrate
  • components that might lead to unfavorable electrochemical properties. Thin film characterization As-deposited and washed PANI films were analyzed by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). FTIR spectra were acquired using
PDF
Album
Supp Info
Full Research Paper
Published 16 Jun 2017

Fully scalable one-pot method for the production of phosphonic graphene derivatives

  • Kamila Żelechowska,
  • Marta Prześniak-Welenc,
  • Marcin Łapiński,
  • Izabela Kondratowicz and
  • Tadeusz Miruszewski

Beilstein J. Nanotechnol. 2017, 8, 1094–1103, doi:10.3762/bjnano.8.111

Graphical Abstract
  • conjugated bonds in the graphene plane were restored, and functional groups are present mainly at the edges. X-ray photoelectron spectroscopy (XPS) further confirmed the presence of phosphorous in the GO-P sample. The XPS spectra of GO and GO-P are presented in Figure 6. The initial GO (Figure 6A) showed
PDF
Album
Supp Info
Full Research Paper
Published 18 May 2017

ZnO nanoparticles sensitized by CuInZnxS2+x quantum dots as highly efficient solar light driven photocatalysts

  • Florian Donat,
  • Serge Corbel,
  • Halima Alem,
  • Steve Pontvianne,
  • Lavinia Balan,
  • Ghouti Medjahdi and
  • Raphaël Schneider

Beilstein J. Nanotechnol. 2017, 8, 1080–1093, doi:10.3762/bjnano.8.110

Graphical Abstract
  • Sollers slits) and an X'Celerator as a detector. The powder samples were placed on a silicon zero-background sample holder and the XRD patterns were recorded at room temperature using Cu Kα radiation (λ = 0.15418 nm). X-ray photoelectron spectroscopy (XPS) analyses were performed on a Gammadata Scienta
PDF
Album
Supp Info
Full Research Paper
Published 17 May 2017

Triptycene-terminated thiolate and selenolate monolayers on Au(111)

  • Jinxuan Liu,
  • Martin Kind,
  • Björn Schüpbach,
  • Daniel Käfer,
  • Stefanie Winkler,
  • Wenhua Zhang,
  • Andreas Terfort and
  • Christof Wöll

Beilstein J. Nanotechnol. 2017, 8, 892–905, doi:10.3762/bjnano.8.91

Graphical Abstract
  • out of ethanolic solution onto Au(111) surfaces. The resulting films were investigated using a complementary set of spectroscopic methods, namely ultra-high vacuum (UHV) infrared reflection–absorption spectroscopy (IRRAS), X-ray photoelectron spectroscopy (XPS), near-edge X-ray absorption fine
  • accessible XPS instrumentation, it was not possible to obtain S 2p and Se 3p photoelectron spectra. The purpose of the XP spectra was the evaluation of the Au 4f and the C 2s resonances to obtain layer thicknesses [34]. X-ray photoelectron spectroscopy (XPS) measurements were performed at room temperature
PDF
Album
Supp Info
Full Research Paper
Published 20 Apr 2017

Graphene functionalised by laser-ablated V2O5 for a highly sensitive NH3 sensor

  • Margus Kodu,
  • Artjom Berholts,
  • Tauno Kahro,
  • Mati Kook,
  • Peeter Ritslaid,
  • Helina Seemen,
  • Tea Avarmaa,
  • Harry Alles and
  • Raivo Jaaniso

Beilstein J. Nanotechnol. 2017, 8, 571–578, doi:10.3762/bjnano.8.61

Graphical Abstract
  • . The oxidation state of vanadium was determined by means of X-ray photoelectron spectroscopy (XPS). Figure 3 depicts the O 1s and V 2p regions in the XPS spectrum measured from the surface of the sample after the PLD process. Because the source was not monochromatic, the V 2p1/2 region is not usable
PDF
Album
Full Research Paper
Published 07 Mar 2017
Graphical Abstract
  • -oxide electronics; X-ray photoelectron spectroscopy (XPS); Introduction For many years, tin dioxide (SnO2) has been widely used as the active material for resistive-type gas sensors for oxidizing and reducing gases [1], thin transparent electrodes and barrier layers in solar cells [2]. This is related
  • results in SnO2 nanolayers of controlled nonstoichiometry/stoichiometry depending on the intended application. This paper presents the X-ray photoelectron spectroscopy (XPS) results on the variation of surface chemistry and electronic properties of RGVO SnO2 nanolayers after exposure to air and subsequent
  • photoelectron spectroscopy (XPS). The layers were tested i) pristine, ii) after air exposure and iii) after UHV annealing to validate perspective recovery procedures of the sensing layers. XPS results showed that the pristine RGVO SnO2 nanolayers are of high purity with a ratio [O]/[Sn] = 1.62 and almost no
PDF
Album
Full Research Paper
Published 27 Feb 2017

Formation and shape-control of hierarchical cobalt nanostructures using quaternary ammonium salts in aqueous media

  • Ruchi Deshmukh,
  • Anurag Mehra and
  • Rochish Thaokar

Beilstein J. Nanotechnol. 2017, 8, 494–505, doi:10.3762/bjnano.8.53

Graphical Abstract
  • diffractometer using Cu Kα1 radiation. The magnetic properties of the samples dried in a vacuum desiccator were determined by vibrating sample magnetometry (Quantum Design, USA). The samples were also analyzed using X-ray photoelectron spectroscopy (XPS, VG Micro Tech ESCA-3000) using non-monochromatic, Al Kα
PDF
Album
Supp Info
Full Research Paper
Published 23 Feb 2017
Other Beilstein-Institut Open Science Activities