Oleksii Ivashenko

1. Monitoring of Energy Conservation and Losses in Molecular Junctions through Characterization of Light Emission. O. Ivashenko, A.J Bergren, R.L. McCreery. Adv. Electr. Mat., 2016. DOI: 10.1002/aelm.201600351
2. Light Emission as a Probe of Energy Losses in Molecular Junctions. O. Ivashenko, A.J Bergren, R.L. McCreery. JACS, 2016, 138 (3), 722-725.  DOI: 10.1021/jacs.5b10018
3. A Remarkable Multitasking Double Spiropyran; Bidirectional Visible Light switching of Polymer Coated Surfaces with dual Redox and Proton Gating. L. Kortekaas, O. Ivashenko, J.T. van Herpt, W.R. Browne. JACS, 2016, 138 (4), 1301–1312. DOI: 10.1021/jacs.5b11604
4. Light Emission as a probe of Energy Losses in Molecular Junctions. O. Ivashenko, A.J. Bergren, R.L. McCreery. JACS, 2016, 138 (3), 722–725. DOI: 10.1021/jacs.5b10018
5. Effect of Surface Reactions on Steel, Al₂O₃ and Si₃N₄ Counterparts on Their Tribological Performance with Polytetrafluoroethylene Filled Composites. J.T. Shen, M. Top, O. Ivashenko, P. Rudolf, Y.T. Pei, J.Th.M. De Hosson. App. Surf. Sci. 2015, 331, 482-489.
6. Preparation and Post-Functionalization of Biocompatible Hyperbranched Polyurea Coatings. F. Xiang, L. Asri, O. Ivashenko, P. Rudolf, T. Loontjens. Langmuir 2015, 31 (9), 2761–2769.
7. Comparing Graphene Growth on Cu (111) and oxidized Cu (111). S. Gottardi, K. Muller, L. Bignardi, J.C. Moreno-Lopez, T.A. Pham, O. Ivashenko, M. Yablonskikh, A. Barinov, J. Bjork, P Rudolf, M. Stohr. Nano Letters 2015, 15 (2), 917–922.
8. Position and Orientation Control of a Photo- and Electrochromic Dithienylethene using a Tripodal Anchor on Gold Surfaces. T.C. Pijper, O. Ivashenko, M. Walko, P. Rudolf, W.R. Browne, B.L. Feringa. J. Phys Chem C. 2015, 119 (7), 3648–3657.
9. Tailor-Made Graphite Oxide-DAB Poly(Propylene Imine) Dendrimer Intercalated Hybrids and Their Potential for Efficient CO₂ Adsorption. T. Tsoufis, F. Katsaros, Z. Sideratou, G. Romanos, O. Ivashenko, P. Rudolf, B.J. Kooi, M.A. Karakassides. Chem. Commun. 2014 50, 10967-10970
10. Thermolubricity of Gas Monolayers on Graphene. M. Pierno, L. Bignardi, M.C. Righi, L. Bruschi, S. Gottardi, O. Ivashenko, M. Stohr, P.L. Silvestrelli, P. Rudolf,G. Mistura. Nanoscale 2014, 6, 8062-8067.
11. Control of Surface Wettability Using Tripodal Light-activated Molecular Motors. K-Y. Chen, O. Ivashenko, G.T. Carroll, J. Robertus, J.C.M. Kistemaker, G. London, W.R. Browne, P. Rudolf and B.L. Feringa. J. Am. Chem. Soc. 2014, 136 (8), 3219-3224
12. Electrochemical Write and Read Functionality through Oxidative Dimerization of Spiropyran Self-Assembled Monolayers on Gold. O. Ivashenko, J.T. van Herpt, B.L. Feringa, P. Rudolf, W.R. Browne. J. Phys. Chem. C, 2013, 117 (36), 18567-18577, DOI: 10.1021/jp406458a
13. Oxidative Electrochemical Aryl C-C Coupling of Spiropyrans. O. Ivashenko,† J. T. van Herpt,† P. Rudolf, B.L. Feringa, W.R. Browne. Chem. Commun., 2013, 49, 6737-6739
14. A Shape-Adaptive, Antibacterial-Coating of Immobilized Quaternary-Ammonium Compounds Tethered on Hyperbranched Polyuria and its Mechanism of Action. L. A.T.W. Asri, M. Crismaru, S. Roest, Y. Chen, O. Ivashenko, P. Rudolf, J.C. Tiller, H.C. van der Mei, T. J.A. Loontjens, H.J. Busscher. Adv. Func. Mat., 2014, 24(3), 346-355. DOI: 10.1002/adfm.201301686
15. Microscopic Characterization of CVD-Suspended Graphene on TEM Grids. L. Bignardi, W.F. van Dorp, S. Gottardi, O. Ivashenko, P. Dudin, A. Barinov, M.A. Stohr, P. Rudolf, 2013, 5(19), 9057-9061, DOI: 10.1039/C3NR02386A
16. UV/Vis and NIR Light-Responsive Spiropyran Self-Assembled Monolayers. O. Ivashenko, J.T. van Herpt, B.L. Feringa, P. Rudolf, W.R. Browne. Langmuir, 2013, 29, 4290–4297.
17. Rapid reduction of Self-Assembled Monolayers of a Disulfide Terminated Para-Nitrophenyl Alkyl Ester on Roughened Au Surfaces during XPS Measurements. O. Ivashenko, J.T. van Herpt, B.L. Feringa, W.R. Browne, P. Rudolf. Chem. Phys. Lett., 2013, 559, 76–81.
18. Remarkable Stability of High Energy Conformers in Self-Assembled Monolayers of a Bistable Electro- and Photoswitchable Overcrowded Alkene.O. Ivashenko, H. Logtenberg, J. Areephong, A.C. Coleman, P.V. Wesenhagen, E.M. Geertsema, N. Heureux, B.L. Feringa, P. Rudolf, and W.R. Browne, J. Phys. Chem. C, 2011, 115 (46), 22965–22975.
19. One-Pot Functionalization of Graphene with Porphyrin through Cycloaddition Reactions. X. Zhang, L. Hou, A. Cnossen, A.C. Coleman, O. Ivashenko, P. Rudolf, B.J. van Wees, W.R. Browne, and B.L. Feringa. Chem. Eur. J., 2011, 17 (32), 8957-8964.
20. Chapter “Carbon in Molecular Electronics” In Electrochemistry of Carbon Electrodes, Wiley VCH, 2015. A. J. Bergren and O. Ivashenko, by ed. P.N. Bartlett, R. Alkire and J. Lipkowski

• Akbar, S.; Hasanain, S.K.; Ivashenko, Oleksii; Dutka, M.V.; Ali, N.Z.; Blake, G.R.; De Hosson, Hosson & Rudolf, P. (2020). Defect ferromagnetism induced by lower valence cation doping: Li-doped SnO2 nanoparticles. RSC Advances.  ISSN 2046-2069.  10(44), s 26342- 26348 . doi: 10.1039/d0ra03644g
• Akbar, Sadaf; Hasanain, Syed K; Ivashenko, Oleksii; Dutka, Mikhail V; Akhtar, Naureen; Hosson, Jeff Th M De; Ali, Naveed Z & Rudolf, Petra (2019). Defect ferromagnetism in SnO 2: Zn 2+ hierarchical nanostructures: correlation between structural, electronic and magnetic properties.. RSC Advances.  ISSN 2046-2069.  9(7), s 4082- 4091 . doi: 10.1039/C9RA00455F
• Mom, Rik V.; Ivashenko, Oleksii; Frenken, Joost W. M.; Groot, Irene M. N. & Sjåstad, Anja Olafsen (2018). Nucleation, Alloying, and Stability of Co–Re Bimetallic Nanoparticles on Al2O3/NiAl(110). Journal of Physical Chemistry C.  ISSN 1932-7447.  122(16), s 8967- 8975 . doi: 10.1021/acs.jpcc.8b00993
• Zheng, Jian; Ivashenko, Oleksii; Fjellvåg, Helmer; Groot, Irene M. N. & Sjåstad, Anja Olafsen (2018). Roadmap for Modeling RhPt/Pt(111) Catalytic Surfaces. Journal of Physical Chemistry C.  ISSN 1932-7447.  122(46), s 26430- 26437 . doi: 10.1021/acs.jpcc.8b08124

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• Ivashenko, Oleksii; Johansson, Niclas; Pettersen, Christine; Jensen, Martin; Zheng, Jian; Schnadt, Joachim & Sjåstad, Anja Olafsen (2020). How surface species drive product distribution during ammonia oxidation, STM and APXPS study.
• Pettersen, Christine; Sjåstad, Anja Olafsen & Ivashenko, Oleksii (2020). Preparation, Characterization and Oxidation of Nanostructured Pt-Rh Surfaces. Vis sammendrag

  Studying the Pt-Rh system and its behavior in gas atmospheres is useful for the understanding of catalytic reactions. In this master project, preparation and characterization of Pt-Rh surfaces in UHV and oxidizing conditions was performed. This was done in order to get a better understandingof the nucleation, growth and alloying behavior of Pt-Rh surfaces, and to see how the variationsin nanostructured surfaces alter theiroxidation behavior. Preparation of Pt/Rh(111) surfaces was performed in our Reactor STM instrument, and surfaces werecharacterized by means of LEED and STM at UHV. Varying preparation conditions like deposition temperature (300 –700 K), coverage (0.14 –2.3 ML), post-annealing time and temperature, was shown to dictate morphology, growth and degree of alloying. From these results, a synthesis strategy roadmap for preparation of nanostructured Pt/Rh(111) surfaces was made. The Pt/Rh(111) roadmap was compared to a similar roadmap for the inverse system (Rh/Pt(111)). The results indicated that choice of substrate, Pt(111) or Rh(111), leads to significant differences in the nanostructure composition. To expand on the results from the Rh/Pt(111) roadmap, Rh/Pt(111) surfaces with coverages in the range 0.4 –1.2 ML were prepared and characterized by means of XPS in UHV. The XPS results indicated that PA to higher temperatures (700-770 K) led to more subsurface diffusion of Rh and alloying compared to lower PA temperatures (600 K), confirming results obtained in theinitialRh/Pt(111) roadmap. To establish how different nanostructured alloys behave in oxidizing conditions, a selection of surfaces (from bare Rh(111) to 2.3 ML Pt/Rh(111)) were exposed to low oxygen pressures (pO2= 1 ×10-3mbar)at 700 K. The surfaces were characterized by means of LEED and STM at UHV. For bare Rh(111) and low Pt enrichement(0.14 ML), a Rh surface oxide was formed displaying acharacteristicmoiré pattern over the entire surface. Increase inthe Pt content led toa gradual loss of moiré pattern. For the 2.3 ML Pt/Rh(111) surface, no surface oxide formed. In addition, NAP-XPS measurements on Rh/Pt(111) surfaces were performed at 1 mbar O2and 600 K. Thesurfaces had previously been post-annealedto different temperatures (600-770 K). XP spectra revealed thatformation of Rh surface oxide correlated withthe degree of alloying with Pt(111), where more alloying prevented oxidation. These results were in line with what had been observed in STM and LEED for Pt/Rh(111) surfaces in low oxygen pressures. This led to the conclusion that amount of Rh on the surface is what governs the degree of surface oxide formation. Depending on the choice of substrate (Pt(111) or Rh(111)), the Rh content on the surface can be modified by either changing the PA/deposition temperature, or by tuning the Pt coverage.

• Sunding, Martin Fleissner; Jensen, Ingvild Julie Thue; Svenum, Ingeborg-Helene; Ivashenko, Oleksii; Redekop, Evgeniy; Wells, Justin; Fagerberg, Ragnar; Sjåstad, Anja Olafsen; Venvik, Hilde Johnsen; Olsbye, Unni & Diplas, Spyridon (2019). National Surface and Interface Analysis Laboratory (NICE II): From (near) in-situ to operando XPS analysis.
• Ivashenko, Oleksii & Sjåstad, Anja Olafsen (2018). Role of Rhodium in RhPt catalysts for ammonia oxidation revealed by operando STM and NAP-XPS.
• Ivashenko, Oleksii; Zheng, Jian; Johansson, Niclas; Groot, Irene M.N.; Schnadt, Joachim & Sjåstad, Anja Olafsen (2018). Role of Rhodium in RhPt catalysts for ammonia oxidation revealed by operando STM and NAP-XPS.
• Ivashenko, Oleksii; Zheng, Jian; Fjellvåg, Helmer & Sjåstad, Anja Olafsen (2017). Operando Investigations of Surfaces for NOx Abatement Catalysis.
• Zheng, Jian; Ivashenko, Oleksii; Sjåstad, Anja Olafsen & Groot, Irene M.N. (2017). XPS and STM characterization of Pt(111) and PtRh/Pt(111) NH3 slip catalysts for NOx abatement. 6th National Meeting On Inorganic And Materials Chemistry.

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