Publications

 

PATENTS

3. International Patent WO2015022021 Polymer electrolyte membrane fuel cells with improved performance (19-02-2015)

2. International Patent WO2006102672 Process to Prepare Stable Trifluorostyrene Containing Compounds Grafted to Base Polymers using an Alcohol/Water Mixture (28-09-2006), US 20060276556 (07-12-2006)

1. International Patent WO2006081970 A Method for Preparing a Membrane to be Assembled in a Membrane Electrode Assembly and Membrane Electrode Assembly (10-08-2006), EP 1844516 (17-10-2007), CN 101116214(30-01-2008), US 20090053611 (26-02-2009)

 

BOOK CHAPTER

S. Alkan Gürsel, L. Gubler, B. Gupta, G. G. Scherer Radiation grafted membranes ‘Fuel Cells 1’, Advances in Polymer Science, Springer, Vol. 215 (2008)

PEER-REVIEWED PUBLICATIONS

67. S. Abdolhosseinzadeh, S. Sadighikia, S. Alkan Gürsel ‘Scalable synthesis of sub-nanosized platinum-reduced graphene oxide composite by an ultra-precise photocatalytic method’ ACS Sustainable Chem. Eng., 6 (3), (2018) [doi:10.1021/acssuschemeng.7b04148]

66.  S. Sadeghi, L. Işıkel Şanlı, E. Güler, S. Alkan Gürsel ‘Enhancing proton conductivity via sub-micron structures in proton conducting membranes originating from sulfonated PVDF powder by radiation-induced grafting’ Solid State Ionics 314, 66 (2018) [doi:10.1016/j.ssi.2017.11.017]

65. S. Ghobadi, R. Bakhtiari, L. Işıkel Şanlı, S. Alkan Gürsel ‘Green composite papers via use of natural binders and graphene for PEM fuel cell electrodes’ ACS Sustainable Chem. Eng. 5 (9), 8407 (2017) [doi:10.1021/acssuschemeng.7b02207]

64. E. Daş, S. Alkan Gürsel, L. Işikel Şanli, A. Bayrakçeken Yurtcan, ‘Thermodynamically controlled Pt loading over graphene nanoplatelets: effect of loading on PEM fuel cell performance’ Int. J. Hydrogen Energy 42, 19246 (2017) [doi:10.1016/j.ijhydene.2017.06.108]

63. S. Mehraeen, S. Alkan Gürsel, M. Papila, F. Ç. Cebeci, ‘Investigation of electrochemical actuation by polyaniline nanofibers’ Smart Mater. Structures 26, 095021 (2017) [doi:10.1088/1361-665X/aa7718]

62. R. Bakhtiari, S. Ghobadi, Esma N. Gülüoğlu, L. Işıkel Şanlı, S. Alkan Gürsel, E. Özden Yenigün ‘Macroscopic assembly of flexible and strong green graphene fibers’ RSC Adv. 7, 26735 (2017) [doi:10.1039/C7RA03975A]

61. B. Yarar Kaplan, L. Işıkel Şanlı, S. Alkan Gürsel, ‘Flexible carbon–cellulose fiber-based composite gas diffusion layer for polymer electrolyte membrane fuel cells’ J. Mater. Sci. 52, 4968 (2017) [doi:10.1007/s10853-016-0734-6]

60. L. Işıkel Şanlı, V. Bayram, S. Ghobadi, N. Düzen, S. Alkan Gürsel, ‘Engineered catalyst layer design with graphene-carbon black hybrid supports for enhanced platinum utilization in PEM fuel cell’ Int. J. Hydrogen Energy 42, 1085 (2017) [doi:10.1016/j.ijhydene.2016.08.210]

59. L. Işıkel Şanlı, B. Yarar, V. Bayram, S. Alkan Gürsel, ‘Electrosprayed catalyst layers based on graphene–carbon black hybrids for the next-generation fuel cell electrodes’ J. Mater Sci. 52, 2091 (2017) [doi:10.1007/s10853-016-0497-0]

58. Yarali, E. Biçer, S. Alkan Gürsel, A. Yürüm, ‘Expansion of titanate nanotubes by the use of a surfactant and its improved performance as an anode in Li-ion batteries’ Electrochim. Acta 220, 453 (2016) [doi:10.1016/j.electacta.2016.10.133]

57. M. Nasef, S. Alkan Gürsel, D. Karabelli, O. Güven, ‘Radiation-grafted materials for energy conversion and energy storage applications’, Progress in Polymer Science 63, 1 (2016) [doi:10.1016/j.progpolymsci.2016.05.002]

56. Daş, S. Alkan Gürsel, L. Işikel Şanli, A. Bayrakçeken Yurtcan, Comparison of two different catalyst preparation methods for graphene nanoplatelets supported platinum catalysts’ Int. J. Hydrogen Energy 41 (23), 9755 (2016) [doi:10.1016/j.ijhydene.2016.01.111]

55. Ghobadi, S. Mehraeen, R. Bakhtiari, B. Shamlooa, V. Sadhu, M. Papila, F. Ç. Cebeci, S. Alkan Gürsel, ‘PVA/PANI/rGO ternary electrospun mats as metal-free anti-bacterial substrates’ RSC Adv. 6, 92434 (2016) [doi: 10.1039/C6RA16785C]

54. Işıkel Şanlı, V. Bayram, B. Yarar, S. Ghobadi, S. Alkan Gürsel, ‘Development of graphene supported platinum nanoparticles for polymer electrolyte membrane fuel cells: Effect of support type and impregnation reduction methods’ Int. J. Hydrogen Energy 41 (23), 3414 (2016) [doi:10.1016/j.ijhydene.2015.12.166]

53. M. Yarali, E. Biçer, S. Alkan Gürsel, A. Yürüm, ‘The effect of pH on the interlayer distances of elongated titanate nanotubes and their use as a Li-ion battery anode’ Nanotechnology 27, 015401 (2016) [doi:10.1088/0957-4484/27/1/015401]

52. S. Ghobadi, S. Sadighikia,  M. Papila, F. Ç. Cebeci, S. Alkan Gürsel ‘Graphene-reinforced polyvinyl alcohol electrospun fibers as building blocks for high performance nanocomposites’ RSC Adv. 5, 85009 (2015)
doi:10.1039/C5RA15689K ]

51. E. Quesnel, F. Roux, F. Emieux, P. Faucherand, E. Kymakis, G. Volonakis, F. Giustino, B. Martín-García, I. Moreels, S. Alkan Gürsel, A. B. Yurtcan, V. Di Noto et al., ‘Graphene-based technologies for energy applications, challenges and perspectives’ 2D Mater. 2, 030204 (2015)
doi:10.1088/2053-1583/2/3/030204 ]

50. A. Yürüm, S. Alkan Gürsel, B. Saner Okan, A. Taralp, F. Bakan, I. Letofsky-Papst, Y. Yürüm ‘Size and dispersion control of Pt nanoparticles grown upon graphite-derived nanosheets’ Chem. Eng. Comm. 202, 1645 (2015)
doi:10.1080/00986445.2014.968714 ]

49. L. Işıkel Şanlı, S. Taş, Y. Yürüm, S. Alkan Gürsel ‘Water free operated phosphoric acid doped radiation-grafted proton conducting membranes for high temperature polymer electrolyte membrane fuel cells’ Fuel Cells 14 (6) 914 (2015)
doi:10.1002/fuce.201300110 ]

48. B. Saner Okan, S. Alkan Gürsel, Y. Yürüm ‘Surface modifications of graphene-based polymer nanocomposites by different synthesis techniques’ Materials Research Society Symposium Proceedings 1451, 131 (2013)
doi:10.1557/opl.2012.1455 ]

47. L. Şanlı, S. Alkan Gürsel, S. Yeşilyurt ‘Design and modeling of high temperature water free proton exchange membranes in DEA PEMFC operations’ ECS Transactions 58 (1) 789 (2013)
doi:10.1149/05801.0789ecst ]

46. B. Saner, S. Alkan Gürsel, Y. Yürüm ‘Layer-by-layer polypyrrole coated graphite oxide and graphene nanosheets as catalyst support materials for fuel cells’ Fullerenes, Nanotubes and Carbon Nanostructures 21, 233 (2013)
doi:10.1080/1536383X.2011.613536 ]

45. B. Saner, S. Alkan Gürsel, Y. Yürüm ‘Facile synthesis of polypyrrole/graphene nanosheet-based nanocomposites as catalyst support for fuel cells’ Materials Research Society Symposium Proceedings 1312, 391 (2011)
doi:10.1557/opl.2011.126 ]

44. B. Saner Okan, A. Yürüm, N. Görgülü, S. Alkan Gürsel, Y. Yürüm ‘Polypyrrole coated thermally exfoliated graphite nanoplatelets and the effect of oxygen surface groups on the interaction of platinum catalysts with graphene-based nanocomposites’ Ind. Eng. Chem. Res. 50, 1256 (2011)
doi:10.1021/ie201613f ]

43. H. D. Çilingir Doğan, S. Alkan Gürsel ‘Preparation and Characterisation of Novel Composites Based on a Radiation Grafted Membrane for Fuel Cells’ Fuel Cells, 11, 361 (2011)
doi:10.1002/fuce.201000153 ]

42. L. Işıkel Şanlı, S. Alkan Gürsel ‘Synthesis and Characterization of Novel Graft Copolymers by Radiation Induced Grafting’ J. App. Polym. Sci. 120, 2313 (2011)
[ doi:10.1002/app.33419 ]

41. H. Ben youcef, S. Alkan Gürsel, A. Buisson, L. Gubler, A. Wokaun, G. G. Scherer ‘Influence of radiation-induced grafting process on mechanical properties of ETFE-based membranes for fuel cells’ Fuel Cells 10(3), 401 (2010)
[ doi:10.1002/fuce.200900200 ]

40. T. Yamaki, S. Sawada, M. Asano, Y. Maekawa, L. Gubler, S. Alkan Gürsel, G. G. Scherer ‘Fuel cell performance of multiply crosslinked polymer electrolyte membranes prepared by two step radiation technique’ ECS Transactions. 25(1), 1439 (2009)
[ doi:10.1149/1.3210700 ]

39. H. Ben youcef, L. Gubler, S. Alkan Gürsel, Dirk Henkensmeier, A. Wokaun, G. G. Scherer ‘Novel ETFE based radiation grafted poly(styrene sulfonic acid-co-methacrylonitrile) proton conducting membranes with increased stability’ Electrochem. Comm. 11, 941 (2009)
[ doi:10.1016/j.elecom.2009.02.047]

38. L. Gubler, H. Ben youcef, T. Yamaki, S. Sawada, S. Alkan Gürsel, A. Wokaun, G. G. Scherer ‘Cross-linker effect in ETFE-based radiation-grafted proton-conducting membranes, II. Extended fuel cell operation and degradation analysis’ J. Electrochem. Soc. 156(4), B532 (2009)
[ doi:10.1149/1.3082109]

37. P. Farquet, C. Padeste, M. Börner, H. Ben youcef, S. Alkan Gürsel, G. G. Scherer, H. H. Solak, V. Saile A Wokaun ‘Microstructured proton-conducting membranes by synchrotron-radiation-induced grafting’ J. Memb. Sci. 325(2), 658 (2008)
[ doi:10.1016/j.memsci.2008.08.040 ]

36. P. Farquet, C. Padeste, H. H. Solak, S. Alkan Gürsel, G. G. Scherer, A. Wokaun ‘Extreme UV radiation grafting of glycidyl methacrylate nanostructures onto fluoropolymer foils by RAFT-mediated polymerization’ Macromolecules 41, 6309 (2008)
[ doi:10.1021%2Fma800202b ]

35. K. Mortensen, U. Gasser, S. Alkan Gürsel, G. G. Scherer ‘Structural characterization of radiation-grafted block copolymer films using SANS technique’ J. Polym. Sci. Part B: Polym. Phys. 46, 1660 (2008)
[ doi:10.1002/polb.21502 ]

34. L. Gubler, H. Ben youcef, S. Alkan Gürsel, A. Wokaun, G. G. Scherer ‘Cross-linker effect in ETFE-based radiation-grafted proton-conducting membranes, I. Properties and fuel cell performance characteristics’ J. Electrochem. Soc. 155(9), B921 (2008)
[ doi:10.1149/1.2951919 ]

33. S. Alkan Gürsel, J. Schneider, H. Ben youcef, A. Wokaun, G. G. Scherer ‘Thermal properties of proton-conducting radiation-grafted membranes’ J. App. Polym. Sci. 108(6), 3577 (2008)
[ doi:10.1002/app.27947 ]

32. H. Ben youcef, S. Alkan Gürsel, A. Wokaun, G. G. Scherer, ‘The influence of crosslinker on the properties of radiation-grafted films and membranes based on ETFE’ J. Memb. Sci. 311(1-2), 208 (2008)
[ doi:10.1016/j.memsci.2007.12.015 ]

31. S. Alkan Gürsel, H. Ben youcef, A. Wokaun, G. G. Scherer ‘Influence of reaction parameters on grafting of styrene into poly(ethylene-alt-tetrafluoroethylene) films’ Nucl. Instr. and Meth. in Phys. Res. B 265(1), 198 (2007)
[ doi:10.1016/j.nimb.2007.08.050 ]

30. P. Farquet, C. Padeste, H. H. Solak, S. Alkan Gürsel, G. G. Scherer, A. Wokaun ‘EUV lithographic radiation grafting of thermo-responsive hydrogel nanostructures’ Nucl. Instr. and Meth. in Phys. Res. B 265(1), 187 (2007)
[ doi:10.1016/j.nimb.2007.08.070 ]

29. L. Gubler, H. Ben youcef, S. Alkan Gürsel, A. Wokaun, G. G. Scherer ‘Crosslinker effect on fuel cell performance characteristics of ETFE based radiation grafted membranes’ ECS Transactions 11(1), 27, (2007)
[ doi:10.1149/1.2780911 ]

28. P. Farquet, A. Kunze, C. Padeste, H. H. Solak, S. Alkan Gürsel, G. G. Scherer, A. Wokaun ‘Influence of solvent viscosity on surface graft-polymerizations’ Polymer 48(17), 4936 (2007)
[ doi:10.1016/j.polymer.2007.06.052 ]

27. S. Alkan Gürsel, Z. Yang, B. Choudhury, M. Roelofs, G. G. Scherer ‘Radiation grafted membranes using a trifluorostyrene derivative’ J. Electrochem. Soc. 153(10), A1964 (2006)
[ doi:10.1149/1.2335626 ]

26. L. Gubler, N. Prost, S. Alkan Gürsel, G. G. Scherer ‘Proton exchange membranes prepared by radiation grafting of styrene/divinylbenzene onto poly(ethylene-alt-tetrafluoroethylene) for low temperature fuel cells’ Solid State Ionics 176, 2849 (2005)
[ doi:10.1016/j.ssi.2005.09.045 ]

25. L. Gubler, S. Alkan Gürsel, G. G. Scherer ‘Radiation grafted membranes for polymer electrolyte fuel cells’ Review Article, Fuel Cells 5(3), 317 (2005)
[ doi:10.1002/fuce.200400078 ]

24. S. Alkan Gürsel, C. Padeste, H. H. Solak, G. G. Scherer ‘Microstructured polymer films by X-ray lithographic exposure and grafting’ Nucl. Instr. and Meth. in Phys. Res. B 236, 449 (2005)
[ doi:10.1016/j.nimb.2005.04.018 ]

23. L. Gubler, N. Beck, S. Alkan Gürsel, F. Hajbolouri, D. Kramer, A. Reiner, B. Steiger, G. G. Scherer, A. Wokaun, B. Rajesh, K R. Thampi ‘Materials for polymer electrolyte fuel cells’ Chimia 58, 826 (2004)
[ doi:10.2533/000942904777677128 ]

22. C. Padeste, H. H. Solak, H. P. Brack, M. Slaski, S. Alkan Gürsel, G. G. Scherer ‘Patterned grafting of polymer brushes onto flexible polymer substrates’ J. Vac. Sci. Technol. B 22(6), 3191 (2004)
[ doi:10.1116/1.1805542 ]

21. H. P. Brack, M. Slaski, L. Gubler, G. G. Scherer, S. Alkan, A. Wokaun ‘Characterization of fuel cell membranes as a function of drying by means of contact angle measurements’ Fuel Cells 4(3), 1 (2004)
[ doi:10.1002/fuce.200400018 ]

20. H. P. Brack, D. Ruegg, H. Bührer, M. Slaski, S. Alkan, G. G. Scherer ‘Differential scanning calorimetry and thermogravimetric analysis investigation of the thermal properties and degradation of some radiation-grafted films and membranes’ J. Polym. Sci. Part B: Polym. Phys. 42(13), 2612 (2004)
[ doi:10.1002/polb.20137 ]

19. H. P. Brack, C. Padeste, M. Slaski, S. Alkan, H. H. Solak ‘Preparation of micro- and nanopatterns of polymer chains grafted onto flexible polymer substrates’ J. Am. Chem. Soc. 126, 1004 (2004)
[ doi:10.1021/ja0379870 ]

18. U. Bulut, S. Alkan, F. Yilmaz, Y. Yağcı, L. Toppare ‘Synthesis, characterization, and electrochromic properties of conducting copolymers of 2-[(3-thienylcarbonyl)oxy]ethyl 3-thiophene carboxylate with thiophene and pyrrole’ J. Macromol. Sci. Pure App. Chem. A41(8), 937 (2004)
[ doi:10.1081/MA-120039180 ]

17. S. Işık, S. Alkan, L. Toppare, I. Cianga, Y. Yağcı ‘Immobilization of invertase and glucose oxidase in poly 2-methylbutyl-2-(3-thienyl) acetate/polypyrrole matrices’ Eur. Polym. J. 39, 2373 (2003)
[ doi:10.1016/S0014-3057(03)00184-8 ]

16. A. Gürsel, S. Alkan, L. Toppare, Y. Yağcı ‘Immobilization of invertase and glucose oxidase in conducting H-type polysiloxane/polypyrrole block copolymers’ React. Func. Polym. 57, 57 (2003)
[ doi:10.1016/j.reactfunctpolym.2003.07.004 ]

15. A. Çırpan, S. Alkan, L. Toppare, I. Cianga, Y. Yağcı ‘Immobilization of cholesterol oxidase in conducting copolymer of thiophene-3-yl acetic acid cholesteryl ester with pyrrole’ Des. Monomers Polym. 6(3), 237 (2003)
[ doi:10.1163/156855503768336252 ]

14. S. Alkan, C. A. Cutler, J. R. Reynolds, ‘High quality electrochromic polythiophenes via BF3.Et2O electropolymerization’ Adv. Funct. Mater. 13(4), 331 (2003)
[ doi:10.1002/adfm.200304307 ]

13. S. Kıralp, S. Alkan, L. Toppare, I. Cianga, Y. Yağcı ‘Synthesis and characterization of conducting copolymers of menthyl ester of 3-thiophene acetic acid with pyrrole’ J. Macromol. Sci. Pure App. Chem. 40(3), 251 (2003)
[ doi:10.1081/MA-120018113]

12. A. Çırpan, S. Alkan, L. Toppare, Y. Hepuzer, Y. Yağcı, ‘Immobilization of invertase in conducting copolymers of 3-methylthienyl methacrylate’ Bioelectrochemistry 59(1-2), 29 (2003)
[ doi:10.1016/S1567-5394(02)00186-X ]

11. A. Çırpan, S. Alkan, L. Toppare, Y. Hepuzer, Y. Yağcı ‘Conducting graft copolymers of (3-methyl thienyl methacrylate) with pyrrole and thiophene’ J. Polym. Sci. Part A: Polym. Chem. 40(23), 4131 (2002)
[ doi:10.1002/pola.10511 ]

10. A. Çırpan, S. Alkan, L. Toppare, I. Cianga, Y. Yağcı ‘Synthesis and characterization of conducting copolymers of thiophene-3-yl acetic acid cholesteryl ester with pyrrole’ J. Mater. Sci. 37(9), 1767 (2002)
[ doi:10.1023/A:1014925218487 ]

9. Z. Balcı, U. Akbulut, L. Toppare, S. Alkan, U. Bakır, Y. Yağcı ‘Immobilization of yeast cells in several conducting polymer matrices’ J. Macromol. Sci. Pure App. Chem. 39(3), 183 (2002)
[ doi:10.1081/MA-120013259 ]

8. S. Tirkeş, L. Toppare, S. Alkan, U. Bakır, A. Önen, Y. Yağcı ‘Immobilization of glucose oxidase in polypyrrole / polytetrahydrofuran graft copolymers’ Int. J. Biol. Macromol. 30(2), 81 (2002)
[ doi:10.1016/S0141-8130(02)00011-9 ]

7. A. Çırpan, S. Alkan, L. Toppare, Y. Yağcı ‘Synthesis and electroactivity of pyrrole end-functionalized poly (2-methyl-2-oxazoline)’ Eur. Polym. J. 37, 2225 (2001)
[ doi:10.1016/S0014-3057(01)00103-3 ]

6. S. Alkan, L. Toppare, U. Bakır, Y. Yağcı ‘Immobilization of urease in conducting thiophene-capped poly (methyl methacrylate)/ pyrrole matrices’ Synth. Met. 123, 95 (2001)
[ doi:10.1016/S0379-6779(00)00580-4 ]

5. S. Alkan, L. Toppare, Y. Hepuzer, Y. Yağcı ‘Synthesis and characterization of conducting block copolymers of thiophene-ended polystyrene with polypyrrole’ Synth. Met. 119, 133 (2001)
[ doi:10.1016/S0379-6779(00)01402-8 ]

4. R. Erginer, L. Toppare, S. Alkan, U. Bakır ‘Immobilization of invertase in functionalized copolymer matrices’ React. Funct. Polym. 45, 227 (2000)
[ doi:10.1016/S1381-5148(00)00036-5 ]

3. S. Alkan, L. Toppare, Y. Hepuzer, Y. Yağcı ‘Immobilization of invertase in conducting thiophene-capped poly(methyl methacrylate)/polypyrrole matrices’ J. Biomater. Sci. Polym. Ed. 10, 1223 (1999)
[ doi:10.1163/156856299X00036 ]

2. S. Alkan, L. Toppare, Y. Hepuzer, Y. Yağcı ‘Block copolymers of thiophene-capped poly(methyl methacrylate) with pyrrole’ J. Polym. Sci. Part A: Polym. Chem. 37, 4218 (1999)
[ doi:10.1002/(SICI)1099-0518(19991115)37:22<4218::AID-POLA22>3.0.CO;2-Z ]

1. N. K. Aras, G. Yılmaz, S. Alkan, F. Korkusuz ‘Trace elements in human bone determined by neutron activation analysis’ J. Radioanal. Nucl. Chem. 239(1), 79 (1999)
[ doi:10.1007/BF02349535 ]

THESIS

PhD Thesis: Conducting block copolymers of thiophene-capped poly(methyl methacrylate) with pyrrole and their uses in immobilization of enzymes.

M.Sc. Thesis: Minor and trace elements (Cu, Ca, K, Na, Mg, Zn) in cortical and trabecular bone determined by atomic absorption spectrometry.