Personnel
| Engineering Research InstituteProfessor of Advanced MaterialsRoom number: 25B11Telephone: +44 28 90368932 Email: p.papakonstantinou@ulster.ac.uk School of Engineering University of Ulster Jordanstown campus Shore Road Newtownabbey Co. Antrim BT37 0QB |
Profile/Research Interests
After doctoral studies at Queen’s University of Belfast on magneto-optical materials and postdoctoral research on fs direct laser micro-deposition at IESL in Crete, Pagona moved to the University of Ulster in 1998 embarking on a new research programme addressing the synthesis and comprehensive characterisation of diamond like carbon. Currently her group specializes on the fabrication and functionalization of low dimensional carbon based nanomaterials, the characterization of their unique physical and physicochemical properties and the demonstration of these materials in biological sensing and energy areas. The team has made several breakthroughs in the above areas
http://www.nano.org.uk/news/oct2008/latest1647.htm, http://www.nano.org.uk/news/april2009/latest1853htm
http://www.nano.org.uk/news/1135
http://www.nanowerk.com/spotlight/spotid=23992.php
A recent highlight of the graphene work has been the integration of vertical graphene sheets into a platform, for elucidating the electrocatalytic properties of graphene edges. The work has created a new class of graphene based electrodes for a wide range of applications in the electroanalytical, biosensing, energy storage/conversion sectors that could essentially compete their vertically aligned carbon nanotubes counterparts.The team has also pioneered a simple, low cost and environmentally friendly way to turn common graphite flakes into bulk amounts of either high quality graphene nanosheets or quantum dots by ionic liquid assisted grinding. They have established an international reputation on probing the local atomic environment of carbon based materials by synchrotron light. In a series of papers the details of the interaction of foreign molecules such as nitrogen, oxygen, silicon and chlorine with the graphene lattice have been investigated by synchrotron based spectroscopies (NEXAFS, PEEM, XPS, VB).
Responsibilities
Professor Papakonstantinou serves on the following committees:
- Diamond Light Source
- Helmholtz-Zentrum Berlin (HZB) light source
- Royal Society International grants
- National Access Programme (SFI) at Tyndall Institute in Cork
- Royal Irish Academy of Engineering
- IOP Ireland.
Her work has attracted international recognition and she is the recipient of a RAE/Leverhulme Trust Senior Advanced Fellowship (2011) and a fellowship from the University of Ulster (2003).
Teaching
Current lecture courses:
- Introduction to Nanotechnology to level 4 Engineering students
- Materials to level 2 Engineering students
- Micro-Nanoscale fabricationto MSc Engineering students
- Analytical science to level 2 Bioengineering Students
- Module co-ordinator for Graphical communications, Micro- Nanoscale fabrication.
Selected Publications
Wang T, Liu L, Zhu Z, Papakonstantinou P, Hu J, Liu H, and Li M: “Enhanced electrocatalytic activity for hydrogen evolution reaction from self-assembled monodispersed molybdenum sulfide nanoparticles on an Au electrode”, Energy & Environmental Science, 6, (2013) 625 (PDF).
N Shang, P Papakonstantinou, S Sharma, G Lubarsky, M Li, DW McNeill, AJ Quinn, Q Zhou and R Blackley: "Controllable selective exfoliation of high-quality graphene nanosheets and nanodots by ionic liquid assisted grinding". Chemical Communications, 48, (2012) 1877 (PDF)
A. Ney,P. Papakonstantinou,A. Kumar, N. Shang, N. Peng, “Irradiation enhanced paramagnetism on graphene nanoflakes” Applied Physics Letters, 99 (2011) 102504 (PDF)
A. Ganguly, S. Sharma, P. Papakonstantinou, J. Hamilton, Probing the Thermal Deoxygenation of Graphene Oxide Using high resolution x ray spectroscopies The Journal of Physical Chemistry C, 115 (2011) 17009. (PDF)
S. Sharma, A. Ganguly, P. Papakonstantinou, X. Miao, M. Li, J. Hutchison, S. Ukleja, M. Delichatsios, “Rapid Microwave Synthesis of CO Tolerant Reduced Graphene Oxide-Supported PlatinumElectrocatalysts for Oxidation of Methanol” The Journal of Physical Chemistry C, 114 (2010) 19459. (PDF)
N. Shang, P. Papakonstantinou, P. Wang, SRP Silva "Platinum Integrated Graphene for Methanol Fuel Cells", The Journal of Physical Chemistry C, 114 (2010) 15837. (PDF)
N. Shang, P. Papakonstantinou, P. Wang, A. Zakharov, U. Palnitkar, I.N. Lin, M. Chu, A. Stamboulis, " Self-Assembled Growth, Microstructure, and Field-Emission High-Performance of Ultrathin Diamond Nanorods", ACS Nano, 3 (2009) 1032. (PDF)
N. Shang, P. Papakonstantinou, M. McMullan, M. Chu, A. Stamboulis, A. Potenza, SS. Dhesi, H. Marchetto, " Catalyst-free efficient growth, orientation and biosensing properties of multilayer graphene nanoflake films with sharp edge planes ", Advanced Functional Materials, 18, (2008) 3506.(PDF)
N. Sun, M. McMullan, P. Papakonstantinou, H. Gao, X. Zhang, D. Mihailovic, M. Li "Bioassembled nanocircuits of Mo6S9-xIx nanowires for electrochemical immunodetection of estrone hapten" Analytical Chemistry 80 (2008) 3593.(PDF)
Wang , T, Liu, L, Zhu, Z, Papakonstantinou, P, Hu, J, Liu, H and Li, M (2013) Enhanced electrocatalytic activity for hydrogen evolution reaction from self-assembled monodispersed molybdenum sulfide nanoparticles on an Au electrode. Energy & Environmental Science, 6 . pp. 625-633. [Journal article]
Chiou, JW, Ray, SC, Peng , SI, Chuang, CH, Wang, BY, Tsai, HM, Pao, CW, Lin, HJ, Shao, YC, Wang, HF, Chen, SC, Pong, WF, Yeh, YC, Chen, CW, Chen, LC, Chen, KH, Tsai, HM, Kuamar, A, Ganguly, A, Papakonstantinou, P, Yamane, H, Kosugi, N, Regier, T, Liu, L and Sham, TK (2012) Nitrogen Functionalized Graphene Nanoflakes (GNFs:N): Tunable Photoluminescence and Electronic Structures. The Journal of Physical Chemistry C, 116 . pp. 16251-16258. [Journal article]
Erdem, A, Muti, M, Papakonstantinou, P, Canavar, E, Karadeniz, H, Congur, G and Sharma, S (2012) Graphene oxide integrated sensor for electrochemical monitoring ofmitomycin C–DNA interaction. ANALYST, 137 . pp. 2129-2135. [Journal article]
Kumar, A, Ganguly, A and Papakonstantinou, P (2012) Thermal stability study of nitrogen functionalities in a graphene network. Journal of Physics: Condensed Matter , 24 . 235503-6pages. [Journal article]
McCormac, C, Davis, J, Papakonstantinou, P and Ward, N (2012) Research Project Success: The Essential Guide for Science and Engineering Students. Royal Society of Chemistry. Cambridge. 120 pp ISBN 1849733821 [Book (authored)]
Shang, N, Kumar, A, Sun, N, Sharma, S, Papakonstantinou, P, Li, MX, Blackley, RA, Zhou, W, Kalrsson, LS and Silva, SRP (2012) Vertical graphene nanoflakes for the immobilization, electrocatalytic oxidation andquantitative detection of DNA. Electrochemistry Communications, 25 . pp. 140-143. [Journal article]
Shang, NG, Papakonstantinou, P, Sharma, S, Lubarsky, G, Li, M, McNeill, DW, Quinn, AJ, Zhou, W and Blackley, R (2012) Controllable selective exfoliation of high-quality graphene nanosheets and nanodots by ionic liquid assisted grinding. Chemical Communications , 48 . pp. 1877-1879. [Journal article]
Ganguly, A, Sharma, S, Papakonstantinou, P and Hamilton, JWJ (2011) Probing the Thermal Deoxygenation of Graphene Oxide Using High-Resolution In Situ X-ray-Based Spectroscopies. The Journal of Physical Chemistry C, 115 . pp. 17009-17019. [Journal article]
Lin, H, Cheng, H, Liu, L, Zhu, Z, Shao, Y, Papakonstantinou, P, Mihailovic, D and Li, M (2011) Thionin attached to a gold electrode modified with self-assembly of Mo6S9−XIXnanowires for amplified electrochemical detection of natural DNA. Biosensors and Bioelectronics, 26 . pp. 1866-1870. [Journal article]
McMullan, M, Sun, N, Papakonstantinou, P, Li, MX, Zhou, W and Mihalilovic, D (2011) Aptamer conjugated Mo6S9−xIx nanowires for direct and highly sensitive electrochemical sensing of thrombin. Biosensors and Bioelectronics, 26 . pp. 1853-1859. [Journal article]
Muti, M, Sharma, S, Erdem, A and Papakonstantinou, P (2011) Electrochemical Monitoring of Nucleic Acid Hybridization by Single-Use Graphene Oxide-Based Sensor. Electroanalysis, 23 (1). pp. 272-279. [Journal article]
Ney, A., Papakonstantinou, P., Ajay, K., Shang, NG and Peng, N. (2011) Irradiation enhanced paramagnetism on graphene nanoflakes. Applied Physics Letters, 99 . pp. 102504-1. [Journal article]
Ray, SC, Sahu, DR and Papakonstantinou, P (2011) Dia-Magnetic to Ferro-Magnetic Behavioral Change of Fe-Catalysts Based Nitrogenated Carbon Nanotubes (NCNTs) by the Process of Chlorination/Oxidation. Journal of Nanoscience and Nanotechnology, 11 . pp. 8269-8273. [Journal article]
Shang, NG, Silva, SRP, Jiang, X and Papakonstantinou, P (2011) Directly observable G band splitting in Raman spectra from individual tubular graphite cones. Carbon, 49 . pp. 3048-3054. [Journal article]
Erdem, A, Papakonstantinou, P, Murphy, H, McMullan, M, Karadeniz, H and Sharma, S (2010) Streptavidin Modified Carbon Nanotube Based Graphite Electrode for Label-Free Sequence Specific DNA Detection. Electroanalysis, 22 (6). pp. 611-617. [Journal article]
Pao, CW, Ray, SC, Tsai, HM, Chen , HC, Lin , IN, Pong, WF, Chiou, JW, Tsai, MH, Shang, NG, Papakonstantinou , P and GuO, GH (2010) Change of Structural Behaviors of Organo-Silane Exposed Graphene Nanoflakes. The Journal of Physical Chemistry C, 114 . pp. 8161-8166. [Journal article]
Ray, SC, Ghosh, SK, Chiguvare, Z, Palnitkar, U, Pong, WF, Lin , IN, Papakonstantinou, P and Strydom, AM (2010) Electron Field Emission of Silicon-Doped Diamond-Like Carbon Thin Films. Japanese Journal of Applied Physics, 49 . 111301-1-111301-6. [Journal article]
Shang, Naigui, Papakonstantinou, P, Wang, P and Silva, SRP (2010) Platinum Integrated Graphene for Methanol Fuel Cells. The Journal of Physical Chemistry C, 114 (35). pp. 15837-15841. [Journal article]
Shang, NG, Tan, YY, Stolojan, V, Papakonstantinou, P and Silva, SRP (2010) High-rate low-temperature growth of vertically aligned carbon nanotubes. Nanotechnology, 21 . p. 505604. [Journal article]
Sharma, S, Gunguly , A, Papakonstantinou, P, Miao, X, Li, M, Hutchison, JL, Delichatsios, M. and Ukleja, S (2010) Rapid Microwave Synthesis of CO Tolerant Reduced Graphene Oxide-Supported PlatinumElectrocatalysts for Oxidation of Methanol. Journal Of Physical Chemistry C, 114 . pp. 19459-19466. [Journal article]
Iyer, GRS, Papakonstantinou, P, Abbas, G, Maguire, PD and Bakirtzis, D (2009) Dual Role of Purification and Functionalisation of Single Walled CNT by Electron Cyclotron Resonance (ECR) Nitrogen Plasma. e-Journal of Surface Science and Nanotechnology, 7 . pp. 337-340. [Journal article]
Lin, H, Cheng, H, Miao, XP, Papakonstantinou, P, Mihailovic, D and Li, MX (2009) A Novel Hydrogen Peroxide Amperometric Sensor based on Thionin Incorporated onto a Mo6S9-xIx Nanowire Modified Glassy Carbon Electrode. ELECTROANALYSIS, 21 (23). pp. 2602-2606. [Journal article]
Ray, SC, Palnitkar, U, Pao, CW, Tsai, HM, Pong, WF, Lin, IN, Papakonstantinou, P, Chen, LC and Chen, KH (2009) Enhancement of electron field emission of nitrogenated carbon nanotubes on chlorination. DIAMOND AND RELATED MATERIALS, 18 (2-3). pp. 457-460. [Journal article]
Shang, NG, Papakonstantinou, P, Wang, P, Zakharov, A, Palnitkar, U, Lin, IN, Chu, M and Stamboulis, A (2009) Self-Assembled Growth, Microstructure, and Field-Emission High-Performance of Ultrathin Diamond Nanorods. ACS NANO, 3 (4). pp. 1032-1038. [Journal article]
Ray, SC, Palnitkar, U, Pao, CW, Tsai, HM, Pong, WF, Lin, IN, Papakonstantinou, P, Ganguly, A, Chen, LC and Chen, KH (2008) Field emission effects of nitrogenated carbon nanotubes on chlorination and oxidation. JOURNAL OF APPLIED PHYSICS, 104 (6). 063710. [Journal article]
Shang, NG, Papakonstantinou, P, McLaughlin, JAD, Chen, WC, Chen, LC, Chu, M and Stamboulis, A (2008) Fe catalytic growth, microstructure, and low-threshold field emission properties of open ended tubular graphite cones. JOURNAL OF APPLIED PHYSICS, 103 (12). p. 124308. [Journal article]
Shang, NG, Papakonstantinou, P, McMullan, M, Chu, M, Stamboulis, A, Potenza, A, Dhesi, SS and Marchetto, H (2008) Catalyst-Free Efficient Growth, Orientation and Biosensing Properties of Multilayer Graphene Nanoflake Films with Sharp Edge Planes. ADVANCED FUNCTIONAL MATERIALS, 18 (21). pp. 3506-3514. [Journal article]
Sun, N, McMullan, M, Papakonstantinou, P, Gao, H, Zhang, XX, Mihailovic, D and Li, MX (2008) Bioassembled nanocircuits of Mo6S9-xIx nanowires for electrochemical immunodetection of estrone hapten. ANALYTICAL CHEMISTRY, 80 (10). pp. 3593-3597. [Journal article]
Tweedie, M, Soin, N, Kumari, P, Roy, SS, Mathur, A, Mahony, CMO, Papakonstantinou, P and McLaughlin, JAD (2008) The use of nanotube structures in reducing the turn-on voltage in micro-discharges and micro-gas sensors - art. no. 70370Z. In: CARBON NANOTUBES AND ASSOCIATED DEVICES, San Diego, USA. SPIE-INT SOC OPTICAL ENGINEERING. Vol 7037 15 pp. [Conference contribution]
Abbas, GA, Papakonstantinou, P, Iyer, GRS, Kirkman, IW and Chen, LC (2007) Substitutional nitrogen incorporation through rf glow discharge treatment and subsequent oxygen uptake on vertically aligned carbon nanotubes. PHYSICAL REVIEW B, 75 (19). p. 195429. [Journal article]
Li, ZL, Jaroniec, M, Papakonstantinou, P, Tobin, JM, Vohrer, U, Kumar, S, Attard, G and Holmes, JD (2007) Supercritical fluid growth of porous carbon nanocages. CHEMISTRY OF MATERIALS, 19 (13). pp. 3349-3354. [Journal article]
Ray, SC, Pao, CW, Tsai, HM, Chiou, JW, Pong, WF, Chen, CW, Tsai, MH, Papakonstantinou, P, Chen, LC and Chen, KH (2007) A comparative study of the electronic structures of oxygen- and chlorine-treated nitrogenated carbon nanotubes by x-ray absorption and scanning photoelectron microscopy. APPLIED PHYSICS LETTERS, 91 (20). p. 202102. [Journal article]
Ray, SC, Pao, CW, Tsai, HM, Chiou, JW, Pong, WF, Chen, CW, Tsai, MH, Papakonstantinou, P, Chen, LC, Chen, KH and Graham, WG (2007) Electronic structures and bonding properties of chlorine-treated nitrogenated carbon nanotubes: X-ray absorption and scanning photoelectron microscopy studies. APPLIED PHYSICS LETTERS, 90 (19). p. 192107. [Journal article]
Ray, SC, Pao, CW, Tsai, HM, Chiou, JW, Pong, WF, Tsai, MH, Okpalugo, TIT, Papakonstantinou, P and Pi, TW (2007) Enhancement of sp(3)-bonding in high-bias-voltage grown diamond-like carbon thin films studied by x-ray absorption and photoemission spectroscopy. JOURNAL OF PHYSICS-CONDENSED MATTER, 19 (17). p. 176204. [Journal article]
Vohrer, U, Holmes, J, Li, Z, Teh, A, Papakonstantinou, P, Ruether , M and Blau, W (2007) Tailoring the Wettability of Carbon Nanotube Powders, Bucky Papers and Vertically Aligned Nanofibers by Plasma Assisted Functionalization. Journal of Nanotechnology Online (Azojono), 3 . pp. 1-12. [Journal article]
Erdem, A, Papakonstantinou, P and Murphy, H (2006) Direct DNA hybridization at disposable graphite electrodes modified with carbon nanotubes. ANALYTICAL CHEMISTRY, 78 (18). pp. 6656-6659. [Journal article]
Fang, WC, Huang, JH, Sun, CL, Chen, LC, Papakonstantinou, P and Chen, KH (2006) Superior electrochemical performance of CNx nanotubes using TiSi2 buffer layer on Si substrates. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 24 (1). pp. 87-90. [Journal article]
Fang, WC, Sun, CL, Huang, JH, Chen, LC, Chyan, O, Chen, KH and Papakonstantinou, P (2006) Enhanced electrochemical properties of arrayed CNx nanotubes directly grown on Ti-buffered silicon substrates. ELECTROCHEMICAL AND SOLID STATE LETTERS, 9 (3). A175-A178. [Journal article]
Lemoine, P, Quinn, JP, Maguire, PD, Papakonstantinou, P and Dougan, N (2006) Rheological analysis of creep in hydrogenated amorphous carbon films. THIN SOLID FILMS, 514 (1-2). pp. 223-230. [Journal article]
Murphy, H, Papakonstantinou, P and Okpalugo, TIT (2006) Raman study of multiwalled carbon nanotubes functionalized with oxygen groups. JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 24 (2). pp. 715-720. [Journal article]
Roy, SS, McCann, R, Papakonstantinou, P, McLaughlin, JAD, Kirkman, IW, Bhattacharya, Basab and Silva, SRP (2006) Near edge x-ray absorption fine structure study of aligned pi-bonded carbon structures in nitrogenated ta-C films. JOURNAL OF APPLIED PHYSICS, 99 (4). 043511-043515. [Journal article]
Roy, SS, Papakonstantinou, P, Okpalugo, TIT and Murphy, H (2006) Temperature dependent evolution of the local electronic structure of atmospheric plasma treated carbon nanotubes: Near edge x-ray absorption fine structure study. JOURNAL OF APPLIED PHYSICS, 100 (5). 053703. [Journal article]
Abbas, GA, Papakonstantinou, P and McLaughlin, JAD (2005) Investigation of local ordering and electronic structure in Si- and hydrogen-doped tetrahedral amorphous carbon thin films. APPLIED PHYSICS LETTERS, 87 (25). p. 251918. [Journal article]
Abbas, GA, Papakonstantinou, P, McLaughlin, JAD, Weijers-Dall, TDM, Elliman, RG and Filik, J (2005) Hydrogen softening and optical transparency in Si-incorporated hydrogenated amorphous carbon films. JOURNAL OF APPLIED PHYSICS, 98 (10). p. 103505. [Journal article]
Abbas, GA, Papakonstantinou, P, Okpalugo, TIT, McLaughlin, JAD, Filik, J and Harkin-Jones, E (2005) The improvement in gas barrier performance and optical transparency of DLC-coated polymer by silicon incorporation. THIN SOLID FILMS, 482 (1-2). pp. 201-206. [Journal article]
Abbas, GA, Roy, SS, Papakonstantinou, P and McLaughlin, JAD (2005) Structural investigation and gas barrier performance of diamond-like carbon based films on polymer substrates. CARBON, 43 (2). pp. 303-309. [Journal article]
Ahmad, I, Roy, SS, Maguire, PD, Papakonstantinou, P and McLaughlin, JAD (2005) Effect of substrate bias voltage and substrate on the structural properties of amorphous carbon films deposited by unbalanced magnetron sputtering. THIN SOLID FILMS, 482 (1-2). pp. 45-49. [Journal article]
Maguire, PD, McLaughlin, JAD, Okpalugo, TIT, Lemoine, P, Papakonstantinou, P, McAdams, ET, Needham, M, Ogwu, AA, Ball, M and Abbas, GA (2005) Mechanical stability, corrosion performance and bioresponse of amorphous diamond-like carbon for medical stents and guidewires. DIAMOND AND RELATED MATERIALS, 14 (8). pp. 1277-1288. [Journal article]
McCann, R, Roy, SS, Papakonstantinou, P, Abbas, GA and McLaughlin, JAD (2005) The effect of thickness and arc current on the structural properties of FCVA synthesised ta-C and ta-C : N films. DIAMOND AND RELATED MATERIALS, 14 (3-7, Sp. Iss. SI). pp. 983-988. [Journal article]
McCann, R, Roy, SS, Papakonstantinou, P, Ahmad, I, Maguire, PD, McLaughlin, JAD, Petaccia, L, Lizzit, S and Goldoni, A (2005) NEXAFS study and electrical properties of nitrogen-incorporated tetrahedral amorphous carbon films. DIAMOND AND RELATED MATERIALS, 14 (3-7, Sp. Iss. SI). pp. 1057-1061. [Journal article]
McCann, R, Roy, SS, Papakonstantinou, P, Bain, MF, Gamble, HS and McLaughlin, JAD (2005) Chemical bonding modifications of tetrahedral amorphous carbon and nitrogenated tetrahedral amorphous carbon films induced by rapid thermal annealing. THIN SOLID FILMS, 482 (1-2). pp. 34-40. [Journal article]
McCann, R, Roy, SS, Papakonstantinou, P, McLaughlin, JAD and Ray, SC (2005) Spectroscopic analysis of a-C and a-CNx films prepared by ultrafast high repetition rate pulsed laser deposition. JOURNAL OF APPLIED PHYSICS, 97 (7). pp. 73522-1. [Journal article]
Okapalugo, TIT, Papakonstantinou, P, Murphu, H, McLaughlin, JAD and Brown, NMD (2005) Oxidative functionalization of carbon nanotubes in atmospheric pressure filamentary dielectric barrier discharge (APDBD). Carbon, 43 (14). p. 2951. [Journal article]
Okpalugo, TIT, Papakonstantinou, P, Murphy, H, McLaughlin, JAD and Brown, NMD (2005) High resolution XPS characterization of chemical functionalised MWCNTs and SWCNTs. Carbon, 43 (1). pp. 153-161. [Journal article]
Okpalugo, TIT, Papakonstantinou, P, Murphy, H, McLaughlin, JAD, Brown, NMD and McNally, T (2005) Surface-to-Depth Analysis of Functionalized Multi-Wall Carbon Nanotubes (FMWCNTS). Fullerenes, Nanotubes and Carbon Nanostructures, 13 (1). p. 477. [Journal article]
Papakonstantinou, P, Kern, R, Robinson, L, Murphy, H, Irvine, J, McAdams, ET, McLaughlin, JAD and McNally, T (2005) Fundamental Electrochemical Properties of Carbon Nanotube Electrodes. Fullerenes, Nanotubes and Carbon Nanostructures, 13 (2). pp. 91-108. [Journal article]
Ray, SC, Okpalugo, TIT, Pao, CW, Tsai, HM, Chiou, JW, Jan, JC, Pong, WF, Papakonstantinou, P, McLaughlin, JAD and Wang, WJ (2005) Electronic structure and photoluminescence study of silicon doped diamond like carbon (Si : DLC) thin films. MATERIALS RESEARCH BULLETIN, 40 (10). pp. 1757-1764. [Journal article]
Ray, SC, Okpalugo, TIT, Papakonstantinou, P, Bao, CW, Tsai, HM, Chiou, JW, Jan, JC, Pong, WF, McLaughlin, JAD and Wang, WJ (2005) Electronic structure and hardening mechanism of Si-doped/undoped diamond-like carbon films. THIN SOLID FILMS, 482 (1-2). pp. 242-247. [Journal article]
Ray, SC, Pao, CW, Chiou, JW, Tsai, HM, Jan, JC, Pong, WF, McCann, R, Roy, SS, Papakonstantinou, P and McLaughlin, JAD (2005) Electronic properties of a-CNx thin films: An x-ray-absorption and photoemission spectroscopy study. JOURNAL OF APPLIED PHYSICS, 98 (3). 033708. [Journal article]
Roy, SS, McCann, R, Papakonstantinou, P, Maguire, PD and McLaughlin, JAD (2005) The structure of amorphous carbon nitride films using a combined study of NEXAFS, XPS and Raman spectroscopies. THIN SOLID FILMS, 482 (1-2). pp. 145-150. [Journal article]
Abbas, GA, Papakonstantinou, P and McLaughlin, JAD (2004) X-ray reflectivity, photoelectron and nanoindentation studies of tetrahedral amorphous carbon (ta-C) films synthesized by double bend cathodic arc. DIAMOND AND RELATED MATERIALS, 13 (4-8). pp. 1486-1490. [Journal article]
McCann, R, Roy, SS, Papakonstantinou, P, Maguire, PD and McLaughlin, JAD (2004) An investigation of the structural changes of ta-C and ta-C:N nano films as a function of thickness and arc current. Bulletin of the American Physics Society, 49 (9). p. 30. [Journal article]
Ray, SC, Bao, CW, Tsai, HM, Chiou, JW, Jan, JC, Kumar, KPK, Pong, WF, Tsai, MH, Wang, WJ, Hsu, CJ, Okpalugo, TIT, Papakonstantinou, P and McLaughlin, JAD (2004) Electronic structure and bonding properties of Si-doped hydrogenated amorphous carbon films. Applied Physics Letters, 85 (18). pp. 4022-4024. [Journal article]
Roy, SS, Papakonstantinou, P, Abbas, GA, McCann, R, Quinn, JP and McLaughlin, JAD (2004) Bonding configurations in DBOP-FCVA nitrogenated tetrahedral amorphous carbon films studied by Raman and X-ray photoelectron spectroscopies. Diamond and Related Materials, 13 (4-8). pp. 1459-1463. [Journal article]
Roy, SS, Papakonstantinou, P, McCann, R, McLaughlin, JAD, Klini, A and Papadogiannis, N (2004) Bonding configurations in amorphous carbon and nitrogenated carbon films synthesised by femtosecond laser deposition. Applied Physics A, 79 (4-6). pp. 1009-1014. [Journal article]
Papakonstantinou, P, Zhao, JF, Lemoine, P, McAdams, ET and McLaughlin, JAD (2002) The effects of Si incorporation on the electrochemical and nanomechanical properties of DLC thin films. DIAMOND AND RELATED MATERIALS, 11 (3-6, Sp. Iss. SI). pp. 1074-1080. [Journal article]
Papakonstantinou, P, Zhao, JF, Richardot, A, McAdams, ET and McLaughlin, JAD (2002) Evaluation of corrosion performance of ultra-thin Si-DLC overcoats with electrochemical impedance spectroscopy. DIAMOND AND RELATED MATERIALS, 11 (3-6, Sp. Iss. SI). pp. 1124-1129. [Journal article]
Mckay , K, Papakonstantinou, P, Dodd, PM, Atkinson, R and Pollard, RJ (2001) Microstructure, magnetic and nanomechanical properties of FeTaN films prepared by co-sputtering. JOURNAL OF PHYSICS D-APPLIED PHYSICS , 34 . pp. 41-47. [Journal article]
Papakonstantinou, P and Lemoine, P (2001) Influence of nitrogen on the structure and nanomechanical properties of pulsed laser deposited tetrahedral amorphous carbon. JOURNAL OF PHYSICS-CONDENSED MATTER , 13 . pp. 2971-2987. [Journal article]
Papakonstantinou, P, Somasundram, K, Cao, X and Nevin, A (2001) Crystal surface defects and oxygen gettering in thermally oxidized bonded SOI wafers. JOURNAL OF THE ELECTROCHEMICAL SOCIETY , 148 . G36-G42. [Journal article]
Papakonstantinou, P, Zeze, DA, Klini, A and McLaughlin, JAD (2001) Chemical bonding and nanomechanical studies of carbon nitride films synthesised by reactive pulsed laser deposition. Diamond and Related Materials, 10 (3-7). pp. 1109-1114. [Journal article]
Papakonstantinou, P, Lemoine, P, McLaughlin, JAD, MacKay, K, Dodd, PM, Polard, RJ and Atkinson, R (2000) Nanoindentation studies of FeXN (X=Ta, Ti) soft magnetic films. JOURNAL OF APPLIED PHYSICS, 87 . pp. 6170-6172. [Journal article]
Papakonstantinou, P, Vainos, NA and Fotakis, C (1999) Microfabrication by UV femtosecond laser ablation of Pt, Cr and indium oxide thin films. Applied Surface Science, 151 . pp. 159-170. [Journal article]
Papakonstantinou, P, O'Neill, M.C., Atkinson, R, Al-Wazzan, R, Morrow, T and Salter, IW (1998) Influence of oxygen pressure on the expansion dynamic of Ba-hexaferrite ablation plumes and on the properties of deposited thin films. Journal of Magnetism and Magnetic Materials, 189 . pp. 120-129. [Journal article]
Zergioti , I, Mailis, S, Vainos, NA, Papakonstantinou, P, Kalpouzos, C, Grigoropoulos, CP and Fotakis, C (1998) Microdeposition ofmetal and oxide structures using ultrashort laser pulses. Applied Physics A: Materials Science & Processing, 66 . pp. 579-582. [Journal article]
Zimsa, Z, Gerber, R, Reid, T, Tesar, R, Atkinson, R and Papakonstantinou, P (1998) OPTICAL ABSORPTION AND FARADAY ROTATION OF BARIUM HEXAFERRITE FILMS PREPARED BY LASER ABLATION DEPOSITION. Journal of Physics and Chemistry of Solids, 59 . pp. 111-119. [Journal article]
Dodd, PM, Atkinson, R, Papakonstantinou, P, Araghi, MS and Gamble, HS (1997) Correlation between crystalline structure and soft magnetic properties in sputtered sendust films. JOURNAL OF APPLIED PHYSICS , 81 . pp. 4104-4106. [Journal article]
Papakonstantinou, P, Teggart, B and Atkinson , R (1997) Characterisation of Pulsed Laser Deposited Bi Doped Dy Iron Garnet Thin Films on GGG(111), GGG(110), YSZ(lO0) and Si(100). JOURNAL DE PHYSIQUE IV , 7 (C1). pp. 475-476. [Journal article]
Gerber, R, Ried, T, Atkinson, R, Papakonstantinou, P, Simsova, J, Cernansky, M, Gemperle, R, Jurek, K and Studnicka, V (1996) Structural and magnetic properties of BaCoxWiyFe12_x_y019 films. Journal of Magnetism and Magnetic Materials, 157-158 . pp. 295-296. [Journal article]
Kambersky, V, Simsova, J, Gemperle, R, Gerber, R and Papakonstantinou, P (1996) Experimental and theoretical domain periods in BaCoxTiyFe12-x-yO19. Journal of the Magnetics Society of Japan , 20 (Supplement No S1). pp. 365-367. [Journal article]
Papakonstantinou, P, O'Neill, M, Atkinson, R, Salter, IW and Gerber, R (1996) ORIENTED BARIUM, STRONTIUM FERRITE FILMS PULSED LASER DEPOSITED ON YSZ(100) AND Si(100) SUBSTRATES. Journal of the Magnetics Society of Japan , 20 (Supplement No S1). p. 336. [Journal article]
Papakonstantinou, P, O'Neill , M, Atkinson, R, Salter, IW and Gerber, R (1996) Substrate temperature and oxygen pressure dependence of pulsed laser-deposited Sr ferrite films. Journal of Magnetism and Magnetic Materials , 152 . pp. 401-410. [Journal article]
Papakonstantinou, P, Teggart, B and Atkinson, R (1996) The effects of substrate temperature and oxygen pressure on pulsed laser deposited Bi-substituted Dy iron garnet films. Journal of Magnetism and Magnetic Materials, 163 . pp. 378-392. [Journal article]
Papakonstantinou, P, Teggart, B, Atkinson, R and Salter, IW (1996) STRUCTURAL AND MAGNETO-OPTICAL PROPERTIES OF PULSED LASER DEPOSITED Bi SUBSTITUTED IRON GARNET FILMS. Journal of the Magnetics Society of Japan , 20 (Supplement No S1). pp. 337-340. [Journal article]
Simsa, Z, Zemek, J, Simsova, J, Gerber, R, Papakonstantinou, P and Atkinson, R (1996) Magneto-optical and xps spectra of cobalt and titanium substituted hexaferrite films. Journal of the Magnetics Society of Japan , 20 (Supplement No S1). pp. 117-120. [Journal article]
Atkinson, R, Kubrakov, NF, O'Neill, M and Papakonstantinou, P (1995) Visualisation of magnetic domain structures through the interaction of their stray fields with magneto-optic garnet films. Journal of Magnetism and Magnetic Materials, 149 . pp. 418-424. [Journal article]
Papakonstantinou, P, Atkinson, R, O'Neill, M, Salter, IW and Gerber, R (1995) Magneto-Optical Properties of Sr-Ferrite Films Produced by Pulsed Laser Ablation. IEEE TRANSACTIONS ON MAGNETICS, 31 . pp. 3283-3285. [Journal article]
Papakonstantinou, P, Atkinson, R, Salter, IW and Gerber, R (1995) CoTi-SUBSTITUTED Ba-FERRITE FILMS PREPARED BY PULSED LASER DEPOSITION. Journal of the Magnetics Society of Japan , 19 (Supplement No S1). pp. 177-180. [Journal article]
Simsova, J, Gemperle, R, Kambersky, R, Cernansky, M, Gerber, R, Papakonstantinou, P and Atkinson, R (1995) Thickness dependence of domain period in BafoxTiyFe12_x_yO 9. Journal of Magnetism and Magnetic Materials , 148 . pp. 247-248. [Journal article]
Atkinson, R, Papakonstantinou, P, Salter, IW and Gerber, R (1994) Optical and magneto-optical properties of Co-Ti-substituted barium hexaferrite single crystals and thin films produced by laser ablation deposition. Journal of Magnetism and Magnetic Materials, 128 . pp. 222-231. [Journal article]
Masterson, HG, Lunney, JG, Coey, JMD, Atkinson, R, Salter, IW and Papakonstantinou, P (1993) Thin films of barium ferrite with perpendicular magnetic anisotropy produced by laser ablation deposition. Journal of Applied Physics, 73 . pp. 3917-3921. [Journal article]
Atkinson, R, Gerber, r, Papakonstantinou, P and Zimsa, Z (1992) Optical and magneto-optical properties of Co/Ti substituted barium ferrite. Journal of Magnetism and Magnetic Materials, 104-107 . pp. 1005-1006. [Journal article]





