The Shankar Research Group - Excitonics and Nanostructures Laboratory

PUBLICATIONS

Monographs and Book Chapters

Shankar K, TiO2 nanotube arrays : Growth and Application, in Springer Encyclopedia of Nanotechnology 2012 DOI 10.1007/978-90-481-9751 Bharat Bhushan (Ed)

Shankar K, Templating and Pattern Transfer Using Anodized Nanoporous Alumina/Titania DOI, in Nanofabrication DOI 10.1007/978-3-7091-0424-8_13 M. Stepanova and S. Dew (eds.)

Refereed Publications

2016

77. Farsinezhad S, Banerjee S, Rajeeva BB, Wiltshire BD, Sharma H, Sura A, Mohammadpour A, Kar P, Fedosejevs R and Shankar K, "Reduced ensemble plasmon linewidths and enhanced two-photon luminescence in anodically formed high surface area Au-TiO2 3D nanocomposites",  ACS Applied Materials & Interfaces (accepted 11/29/16).

76. Mohammadpour A, Wiltshire BD, Farsinezhad S, Zhang Y, Askar AM, Kisslinger R, Delgado WT, He G, Kar P, Rivard E and Shankar K, Charge Transport, Doping and Luminescence in Solution-Processed, Phosphorescent, Air-Stable Tellurophene Thin Films, Organic Electronics39 153-162 2016.

75. Boppella R, Mohammadpour A, Illa S, Farsinezhad S, Basak P, Shankar K and Manorama SV, Hierarchical Rutile TiO2 Aggregates:  High Photonic Strength Material for Optical and Optoelectronic Devices, Acta Materialia 119 92-103 2016.

74. Kar P, Farsinezhad S, Mahdi N, Zhang Y, Obuekwe U, Sharma H, Shen J, Semagina N and Shankar K, Enhanced CH4 yield by photocatalytic CO2 reduction using TiO2 nanotube arrays grafted with Au, Ru and ZnPd nanoparticles, Nano Research (published online Aug 30, 2016), doi:10.1007/s12274-016-1225-4.

73. Zarifi MH, Farsinezhad S, Wiltshire BD, Abdorrazaghi M, Mahdi N, Kar P, Daneshmand M and Shankar K, Effect of Phosphonate Monolayer Adsorbate on the Microwave Photoresponse of TiO2 Nanotube Membranes Mounted on a Planar Double Ring Resonator, Nanotechnology 27, 375201, 2016.

72. Mohammadpour A, Eltahlawy M, Martino A, Askar AM, Kisslinger R, Fedosejevs R and Shankar K, "Optical limiting in Cu/CuO nanostructures formed by magnetic field-assisted anodization", Journal of Nanoscience and Nanotechnology (in press), 2016.

71. Farsinezhad S, Mohammadpour A, Benlamri M, Dalrymple A and Shankar K, "The morphology of TiO2 nanotube arrays grown from atomically peened and non-atomically peened Ti films", Journal of Nanoscience and Nanotechnology (in press), 2016.

70. Benlamri M, Farsinezhad S, Barlage DW and Shankar K, High performance electrodeposited ZnO thin films on flexible substrates, ECS Journal of Solid State Science and Technology, 5(6), P324-P326, 2016.

69. Kobryn AE, Gusarov S and Shankar K, The Effect of Molecular Structure and Environment on the Miscibility and Diffusivity in Polythiophene- Methanofullerene Bulk Heterojunctions:
Theory and Modeling with the RISM Approach
, Polymers, 8(4), 136-151, 2016.

68. Askar AM and Shankar K, Exciton Binding Energy in Organic-Inorganic Tri-Halide Perovskites, Journal of Nanoscience and Nanotechnology, 16(6), 5890-5901, 2016.

67. Benlamri M, Farsinezhad S, Barlage DW and Shankar K, Low residual donor concentration and enhanced charge transport in low-cost electrodeposited ZnO, Journal of Materials Chemistry C, 4, 2279-2283, 2016.

66. Zarifi MH, Farsinezhad S, Abdolrazzaghi M, Daneshmand M and Shankar K, Selective microwave sensors exploiting the interaction of analytes with trap states in TiO2 nanotube arrays, Nanoscale, 8, 7466-7473, 2016.

2015

65. Adl AH, Kar P, Farsinezhad S, Sharma H and Shankar K, Effect of Sol Stabilizer on the Structure and Electronic Properties of Solution-Processed ZnO thin Films, RSC Advances, 5, 87007 - 87018, 2015.

64. Farsinezhad S, Sharma H and Shankar K, Interfacial band alignment for photocatalytic charge separation in TiO2 nanotube arrays coated with CuPt nanoparticles, Physical Chemistry Chemical Physics, 17, 29723-29733A, 2015.

63. Zarifi MH, Mohammadpour A, Farsinezhad S, Wiltshire BD, Nosrati M, Askar AM, Daneshmand M and Shankar K, TRMC Using Planar Microwave Resonators: Application to the Study of Long-lived Charge Pairs in Photoexcited Titania Nanotube Arrays, Journal of Physical Chemistry C, 119 (25), 14358-14365, 2015.

62. Sharma H, Krabbe JD, Farsinezhad S, van Popta AC, Wakefield NG, Fitzpatrick GA and Shankar K, Mapping Stresses in High Aspect Ratio Polysilicon Electrical Through-
Wafer Interconnects (ETWIs)
, Journal of Micro/Nanolithography, MEMS, and MOEMS (JM3), 14(2), 024001, 2015.

61. Zarifi MH, Farsinezhad S, Shankar K and Daneshmand M, Liquid Sensing Using Active Feedback Assisted Co-Planar Microwave Resonator, IEEE Microwave and Wireless Components Letters, 25, 621-623, 2015.

60. [Invited Review Article] Piyush Kar, Arash Mohammadpour, Benjamin Daniel Wiltshire, Abdelrahman Askar and Karthik Shankar, Electron Transport, Trapping and Recombination in Anodic TiO2 Nanotube Arrays, Current Nanoscience - Special Issue on Nanoporous Anodic Oxides, 11(5) 593-614, 2015.

59. Piyush Kar , Yun Zhang , Samira Farsinezhad , Arash Mohammadpour , Benjamin Daniel Wiltshire , Himani Sharma and Karthik Shankar, Rutile phase n- and p-type anodic titania nanotube arrays with square-shaped pore morphologies, Chemical Communications, 51, 7816-7819, 2015.

58. Gang He, Benjamin Daniel Wiltshire, Paul Choi, Aliaksandr Savin, Shuai Sun, Arash Mohammadpour, Michael J Ferguson, Robert McDonald, Samira Farsinezhad, Alex Brown, Karthik Shankar and Eric Rivard, Phosphorescence within Benzotellurophenes and Color Tunable Tellurophenes under Ambient Conditions, Chemical Communications, 51, 5444-5447, 2015.

57. Joel Boulet, Arash Mohammadpour and Karthik Shankar, Insights into the Solution Crystallization of Oriented Alq3 and Znq2 Microprisms and Nanorods, Journal of Nanoscience and Nanotechnology, 15, 6680-6689, 2015.

2014

56. Piyush Kar, Samira Farsinezhad, Xiaojiang Zhang and Karthik Shankar, Anodic Cu2S and CuS Nanorod and Nanowall Arrays: Preparation, Properties and Application in CO2 Photoreduction, Nanoscale, 6, 14305-14318, 2014.

55. Farsinezhad S, Waghmare PR, Wiltshire BD, Sharma H, Amiri S, Mitra SK and Shankar K, Amphiphobic surfaces from functionalized TiO2 nanotube arrays, RSC Advances, 4, 33587-33598, 2014.

54. Mohammadpour A and Shankar K, Magnetic field-assisted electroless anodization: TiO2 nanotube growth on discontinuous, patterned Ti films, Journal of Materials Chemistry A, 2, 13810-13816, 2014.

53. Adl AH, Farsinezhad S, Ma A, Barlage DW and Shankar K, High performance ZnO TFTs through improved material processing and device design, The Proceedings of the ASME 2014 International Mechanical Engineering Congress & Exposition, Volume 2B: Advanced Manufacturing.

52. Farsinezhad S, Waghmare PR, Wiltshire BD, Amiri S, Mitra SK and Shankar K, The wetting behavior of TiO2 nanotube arrays with perfluorinated surface functionalization, The Proceedings of the ASME 2014 International Mechanical Engineering Congress & Exposition, Volume 9: Mechanics of Solids, Structures and Fluids.

51.Benlamri M, Bothe KM, Ma AM, Shoute G, Afshar A, Sharma H, Mohammadpour A, Gupta M, Cadien KC, Tsui YY, Shankar K and Barlage DW, High-mobility solution-processed zinc oxide thin films on silicon nitride, Physica Status Solidi - Rapid Research Letters, 8, 871-875, 2014.

50. He G, Delgado WT, Schatz DJ, Merten C, Mohammadpour A, Mayr L, Ferguson MJ, McDonald R, Brown A, Shankar K and Rivard E, Coaxing Solid State Phosphorescence from Tellurophenes, Angewandte Chemie, 53(18) 4587-4591, 2014.

49. Farsinezhad S, Dalrymple AN and Shankar K, Towards Single-Step Anodic Fabrication of Monodisperse TiO2 Nanotube Arrays on Non-Native Substrates, Physica Status Solidi A: Applications and Materials Science 211(5) 113-1121, 2014.

48. Mohammadpour A, Farsinezhad S, Wiltshire BD and Shankar K, Majority Carrier Transport in Single Crystal Rutile Nanowire Arrays, Physica Status Solidi - Rapid Research Letters (Special Issue: Focus on Functional Oxides) 8(6) 512-516 2014.

2013

47. Khajeh ARA, Shankar K and Choi P, Prediction of the Active Layer Nanomorphology in Polymer Solar Cells Using Molecular Dynamics Simulation, ACS Applied Materials & Interfaces, 5, 4617-4624, 2013.

46. Mohammadpour A, Farsinezhad S, Hsieh LH and Shankar K, Multipodal and Multilayer TiO2 Nanotube Arrays: Hierarchical Structures for Energy Harvesting and Sensing, Proceedings of the Materials Research Society, vol. 1552 : Nanostructured Metal Oxides for Advanced Applications, 2013.

45. Amirsolaimani B, Zhang X, Han F, Farsinezhad S, Mohammadpour A, Dechaine GP and Shankar K, Effect of the Nature of the Metal Co-Catalyst on CO2 Photoreduction Using Fast-Grown Periodically Modulated Titanium Dioxide Nanotube Arrays (PMTiNTs), Proceedings of the Materials Research Society, vol. 1578 : Titanium Dioxide - Fundamentals and Applications, 2013.

44. Kar P and Shankar K, Biodiagnostics Using Oriented and Aligned Inorganic
Semiconductor Nanotubes and Nanowires
, Journal of Nanoscience and Nanotechnology, 13, 4473-4496 2013.

43. Zhang X, Han F, Shi B, Farsinezhad S, Dechaine GP and Shankar K, Photocatalytic Conversion of Diluted CO2 into Light Hydrocarbons Using Periodically Modulated Multiwalled Nanotube Arrays, Angewandte Chemie, 51(51), 12732-12735 2013.

42. Farsinezhad S, Mohammadpour A, Dalrymple AN, Geisinger J, Kar P, Brett MJ and Shankar K, Transparent anodic TiO2 nanotube arrays on plastic substrates for disposable biosensors and flexible electronics, Journal of Nanoscience and Nanotechnology 13, 2885-2891 2013. (pdf of preprint)

41. Mohammadpour A, Utkin I, Bodepudi SC, Kar P, Fedosejevs R, Pramanik S and Shankar K, Photophysics and Energy Transfer Studies of Alq3 Confined in the Voids of Nanoporous Anodic Alumina, Journal of Nanoscience and Nanotechnology 13, 2647-2655 2013.

2012

40. Ma AM, Gupta M, Chowdhury FR, Shen M, Bothe K, Shankar K, Tsui YY and Barlage DW, ZnO Thin Film Transistors with Schottky Source Barriers, Solid-State Electronics 74 104-108 2012.

39. Adl AH, Ma A, Gupta M, Benlamri M, Tsui YY, Barlage DW and Shankar K, Schottky barrier thin film transistors using solution-processed ZnO, ACS Applied Materials & Interfaces 4(3) 1423-1428 2012.

38. Ren J, Ding X, Greer JJ and Shankar K, Increased detection of human cardiac troponin I by a decrease of nonspecific adsorption in diluted self-assembled monolayers, Applied Surface Science, 2012 258(13) 5230-5237.

37. Kar P, Pandey A, Greer JJ and Shankar K, Ultrahigh sensitivity assays for human cardiac
troponin I using TiO2 nanotube arrays
Lab on a Chip, 2012 12 821-828.

2011

36. Li Z, Shankar K, Mor GK, Grimminger RA, Lin CM, Anthony JE and Grimes CA,
"Functionalized pentacenes for dye-sensitized solar cells", Journal of Photonics for Energy, 2011 1 Art. No. 011106.

35. Bandara J, Shankar K, Basham J, Wietasch H, Paulose M, Varghese OK, Grimes CA and
Thelakkat M, "Integration of TiO2 nanotube arrays into solid-state dye-sensitized solar cells", European Physical Journal - Applied Physics 2011 53(2) Art. No. 20601.

34. Bandara J, Shankar K, Grimes CA and Thelakkat M, Efficient and stable, structurally inverted poly(3-hexylthiophene): [6,6]-phenyl-C61-butyric acid methyl ester heterojunction solar cells with fibrous like poly(3-hexylthiophene), Thin Solid Films 2011 520(1) 582-590.

2010

33. Mohammadpour A, Waghmare PR, Mitra SK and Shankar K, Anodic Growth of Large-Diameter Multipodal TiO2 nanotubes ACS Nano 2010 4(12) 7421-30.

32. Mohammadpour A and Shankar K, Anodic TiO2 nanotube arrays with optical wavelength-sized apertures Journal of Materials Chemistry, 2010 20 8474-8477.

31. Kim S, Mor GK, Paulose M, Varghese OK, Shankar K and Grimes CA, "Broad spectrum light harvesting in TiO2 nanotube array - hemicyanine dye-P3HT hybrid solid-state solar cells", IEEE Journal of Selected Topics in Quantum Electronics, 2010 16(6) 1573-1580.

2009 and before

30. Feng X, Shankar K, Paulose M and Grimes CA Ta-doped TiO2 nanowire arrays for high Voc dye sensitized solar cells Angewandtie Chemie, 2009 48, 8095-8098.

29. Mor GK, Kim S, Paulose M, Varghese OK, Shankar K, Basham JI and Grimes CA Visible to near- IR harvesting in TiO2 Nanotube Array-P3HT based Heterojunction Solar Cells Nano Letters 2009 9(12) 4250-4257.

28. Shankar K, Basham JI, Allam NK, Varghese OK, Mor GK, Feng XJ, Paulose M, Seabold JA, Choi KS and Grimes CA Recent advances in the use of TiO2 nanotube and nanowire arrays for oxidative photoelectrochemistry Journal of Physical Chemistry C, 2009113(16) 6327-6359.

27. Shankar K, Feng XJ and Grimes CA Enhanced harvesting of red photons in nanowire solar cells :evidence of resonance energy transfer ACS Nano, 2009 3(4) 788-794.

26. Shankar K, Bandara J, Paulose M, Wietasch H, Varghese OK, Mor GK, LaTempa TJ, Thelakkat M and Grimes CA Highly efficient solar cells using TiO2 nanotube arrays sensitized with a donor-antenna dye Nano Letters, 2008 8(6) 1654-59.

25. Feng X, Shankar K, Varghese OK, Paulose M, LaTempa TJ and Grimes CA Vertically aligned
single crystal TiO2 nanowire arrays grown directly on transparent conducting oxide coated glass: synthesis details and applications
Nano Letters, 2008 8(11) 3781-86.

24. Shankar K, Mor GK, Paulose M, Varghese OK and Grimes CA Effect of device geometry on the performance of TiO2 nanotube array-organic semiconductor double heterojunction solar cells Journal of Non-Crystalline Solids, 2008 354 2767-71. doi:10.1016/j.jnoncrysol.2007.09.070

23. Seabold JA, Shankar K, Wilke RHT, Paulose M, Varghese OK, Grimes CA and Choi KS Photoelectrochemical properties of heterojunction CdTe/TiO2 electrodes constructed using highly ordered TiO2 nanotube arrays Chemistry of Materials, 2008 20(16) 5266-73.

22. Mor GK, Varghese OK, Wilke RHT, Sharma S, Shankar K, LaTempa TJ, Choi KS and Grimes CA p-type Cu-Ti-O nanotube arrays and their use in self-biased heterojunction photoelectrochemical diodes for hydrogen generation Nano Letters, 2008 8(7) 1906-11.

21. Fabregat-Santiago F, Barea EM, Bisquert J, Mor GK, Shankar K and Grimes CA High carrier
density and capacitance in TiO2 nanotube arrays induced by electrochemical doping Journal of the American Chemical Society, 2008 130(34) 11312-316.

20. Allam NK, Shankar K and Grimes CA A general method for the formation of crystalline nanotube arrays without the use of thermal annealing Advanced Materials, 2008 20(20) 3942.

19. Mor GK, Prakasam HE, Varghese OK, Shankar K and Grimes CA Vertically oriented Ti-Fe-O
nanotube array films: Toward a useful material architecture for solar spectrum water photoelectrolysis Nano Letters, 2007 7(8) 2356-64.

18. Shankar K, Mor GK, Prakasam HE, Varghese OK and Grimes CA Self-assembled hybrid
polymer-TiO2 nanotube array heterojunction solar cells Langmuir, 2007 24 12445-449.

17. Mor GK, Shankar K, Paulose M, Varghese OK and Grimes CA High efficiency double
heterojunction polymer photovoltaic cells using highly ordered TiO2 nanotube arrays Applied Physics Letters, 2007 Article 152111.

16. Shankar K, Mor GK, Prakasam HE, Yoriya S, Paulose M, Varghese OK and Grimes CA Highlyordered TiO2 nanotube arrays up to 220 μm in length: use in water photoelectrolysis and dye-sensitized solar cells Nanotechnology 2007 18(6) Article no 065707. doi: 10.1088/0957-4484/18/6/065707

15. Ong KG, Varghese OK, Mor GK, Shankar K and Grimes CA Application of finite-difference time domain to dye-sensitized solar cells: The effect of nanotube-array negative electrode dimensions on light absorption Solar Energy Materials and Solar Cells 2007 91(4) 250-257.

14. Prakasam HE, Shankar K, Paulose M, Varghese OK and Grimes CA A new benchmark for TiO2 nanotube array growth by anodization Journal of Physical Chemistry C, 2007 111(20) 7235-41.

13. Shankar K, Mor GK, Fitzgerald A and Grimes CA Cation effect on the electrochemical formation of very high aspect ratio TiO2 nanotube arrays in formamide-water mixtures Journal of Physical Chemistry C, 2007 111(1) 21-26.

12. Mor GK, Shankar K, Paulose M, Varghese OK and Grimes CA Use of highly-ordered TiO2
nanotube arrays in dye-sensitized solar cells Nano Letters 2006 39 2498-2503.

11. Paulose M, Shankar K, Varghese OK, Mor GK and Grimes CA Application of highly-ordered
TiO2 nanotube-arrays in heterojunction dye-sensitized solar cells J. Phys. D: Appl. Phys, 2006 39(12) 2498-2503.

10. Paulose M, Shankar K, Varghese OK, Mor GK, Hardin B and Grimes CA Backside illuminated
dye-sensitized solar cells based on TiO2 nanotube electrodes Nanotechnology 17(5) 144-6-48, 2006.

9. Shankar K, Tep KC, Mor GK and Grimes CA N-doped and N,F-codoped TiO2
photoelectrodes :An electrochemical strategy to incorporate anionic dopants J. Phys. D: Appl. Phys 39 2361-2366, 2006 .

8. Anodic growth of highly ordered TiO2 nanotube arrays to 134 μm in length. Paulose M, Shankar K, Yoriya S, Prakasam HE, Varghese OK, Mor GK, LaTempa TJ, Fitzgerald A and Grimes CA, Journal of Physical Chemistry B 110 16179-16184 2006.

7. Paulose M, Mor GK, Varghese OK, Shankar K and Grimes CA, Visible light photoelectrochemical and water-photoelectrolysis properties of titania nanotube arrays, Journal of Photochemistry and Photobiology A-Chemistry, 178(1) 8-15, 2006.

6. Yoriya S, Prakasam HE, Varghese OK, Shankar K, Paulose M, Mor GK, LaTempa TJ and Grimes CA. Initial studies on the hydrogen gas sensing properties of highly-ordered high asepct ratio TiO2 nanotube-arrays 20 um to 200 um in length, Sensor Letters 4 334-339, 2006.

5. Mor GK, Shankar K, Paulose M, Varghese OK and Grimes CA, Enhanced photocleavage of water using titania nanotube-arrays Nano Letters 5 191-195, 2005.

4. Mor GK, Shankar K, Varghese OK and Grimes CA, Photoelectrochemical properties of titania nanotubes, Journal of Materials Research 19(10) 2989-96, 2005.

3. Mor GK, Varghese OK, Paulose M, Shankar K and Grimes CA, Effect of anodization bath chemistry on photochemical water splitting using titania nanotubes, 2004 Materials Research Society Symposium Proceedings Vol. 836, 29-34 2005.

2. Paulose M, Varghese OK, Mor GK, Shankar K and Grimes CA, Photoelectrochernical properties of highly-ordered titania nanotube-arrays, 2004 Materials Research Society Symposium Proceedings Vol. 837, 65-70 2005.

1. Morphology and electrical transport in pentacene films on silylated oxide surfaces, Shankar K and Jackson TN, Journal of Materials Research 19 2003-2007, 2004.

Conference Abstracts, Presentations and Posters

T27. (Oral presentation) High-Performance Solution-Processed Zinc Oxide Thin Films On Flexible Substrates, Mourad Benlamri, Samira Farsinezhad, Douglas Barlage and Karthik Shankar, ASME International Mechanical Engineering Congress and Exposition, November 2015, Houston, TX.

T26. (Oral presentation) Cellulose Nanocrystals as structure-directing agents and host matrices for solution-processed electronic composites, Payal Baheti, Samira Farsinezhad, Mourad Benlamri, Arash Mohammadpour, Benjamin Wiltshire, Ahmad Adl, Justin Forth, Piyush Kar and Prof. Karthik Shankar, ASME International Mechanical Engineering Congress and Exposition, November 2015, Houston, TX.

T25. (Poster) Towards the fabrication of conductive paper and semiconducting inks: cellulose nanocrystals blended with conducting polymers, metal nanoparticles and quantum dots, Arash Mohammadpour, Samira Farsinzehad, Payal Baheti, Mourad Benlamri, Ahmad Adl, Benjamin Wiltshire, Yun Zhang, Piyush Kar and Karthik Shankar, 2015 BCN - AI BIO Conference on Bioindustrial Innovations: Unlocking Value and Tackling Climate Change, November 2015, Edmonton, AB.

T24. (Oral presentation) The Wetting of Self-Assembled Monolayer-coated TiO2 Nanotube and Nanorod Arrays, S. Farsinezhad, B. D. Wiltshire, P.R. Waghmare, S. K. Mitra, and K. Shankar, International Conference on MEMS and Sensors (ICMEMSS 2014), IIT-Madras, India, December 2014.

T23. (Oral presentation) Microstrip-coupled Open Loop Microwave Resonators Integrated With 1-D Semiconductor Nanostructures For Sensing, Mohammad Zarifi, Samira Farsinezhad, Benjamin D. Wiltshire, Arash Mohammadpour, Mojgan Daneshmand and Karthik Shankar, International Conference on MEMS and Sensors (ICMEMSS 2014), IIT-Madras, India, December 2014.

T22. (Oral presentation) Enhanced CO2 photoreduction catalysts using noble metal and alloy nanoparticles grafted on to TiO2 nanotubes, Samira Farsinezhad, Uchenna Obuekwe, Himani Sharma, Jing Shen, Natalia Semagina and Karthik Shankar, 23rd Canadian Symposium on Catalysis, Edmonton, May 2014.

T21. (Oral presentation) Investigations into the electronic properties of the nanoparticle-TiO2 nanotube array interface for photocatalytic applications, Himani Sharma, Samira Farsinezhad and Karthik Shankar, 23rd Canadian Symposium on Catalysis, Edmonton, May 2014.

T20. [Invited Talk] Metal Oxide Nanotube and Nanowire Arrays, Karthik Shankar, Professional Development Seminar in Nanotechnology, The Association of Professional Engineers and Geoscientists of Alberta (APEGA) Summit 2014.

T19. (Oral presentation) High-rate CO2 Photoreduction Using Periodically Modulated Multi-walled Titanium Dioxide Nanotube Arrays, Xiaojiang Zhang, Babak Amirsolaimani, Samira Farsinezhad, Arash Mohammadpour and Karthik Shankar, Spring Meeting of the Materials Research Society (MRS-13), San Francisco, April 2013.

T18. (Poster) Multipodal and Multilayer TiO2 Nanotube Arrays: Hierarchical Structures for Energy Harvesting, Sensing and Nanoelectronics, Samira Farsinezhad, Arash Mohammadpour, Ling Hsuan-Hsieh and Karthik Shankar, Spring Meeting of the Materials Research Society (MRS-13), San Francisco, April 2013.

T17. (Poster) Vertically oriented copper sulfide nanorod arrays for high-rate visible-responsive reductive photocatalysis, Samira Farsinezhad, Piyush Kar, Xiaojiang Zhang, Babak Amirsolaimani, Ling Hsuan-Hsieh, Arash Mohammadpour and Karthik Shankar, Spring Meeting of the Materials Research Society (MRS-13), San Francisco, April 2013.

T16. (Oral Presentation) Three-dimensionally ordered films of TiO2 nanotubes for non-lithographically fabricated photonic crystals, Xiaojiang Zhang, Samira Farsinezhad, Arash Mohammadpour and Karthik Shankar, Photonics North, Montreal, June 2012.

T15.(Oral Presentation) Use of multilayer structures to engineer the optical properties of TiO2 nanotube arrays for light harvesting applications, Samira Farsinezhad, Xiaojiang Zhang, Arash Mohammadpour and Karthik Shankar, Photonics North, Montreal, June 2012.

T14. [Invited Talk] K. Shankar, TiO2 nanotube arrays for light larvesting applications, ACAMP Cleantech Seminar, Calgary, March 2012.

T13. [Invited Talk] K. Shankar, TiO2 nanotube and nanorod array-based excitonic solar cells, Department of Electrical Engineering, Indian Institute of Technology-Bombay, India, December 2011.

T12. [Invited Talk] K. Shankar, Frontiers in the Growth and Applications of TiO2 Nanotube Arrays, Colloquium, Department of Physics, Indian Institute of Technology-Madras, Chennai, India, November 2011.

T11. [Invited Talk] K. Shankar, Ordered Heterojunction Excitonic Solar Cells, Special Lecture, Indian Institute of Science (IISc), organized by Department of Inorganic and Physical Chemistry and Royal Society of Chemistry (Deccan Section), Bangalore, India, November 2011.

T10. Surface tension and wetting mechanisms for nanotube combination, Waghmare P, Mohammadpour A, Shankar K, Mitra SK, Colloids & Materials 2011, May 2011 Amsterdam, Netherlands.

T9. [Invited Talk] K. Shankar, Arrays of Vertically Oriented One-Dimensional TiO2 Nanostructures: Growth and Applications, Distinguished Speakers Series, Department of Chemistry, University of Alberta, November 2009.

T8. Applications of soluble oligoacenes in organic photovoltaics, Li Z, Shu Y, Parkin SR, Anthony JE, Shankar K, Grimes CA, Lim YF and Malliaras GG, 9th International Symposium on Functional Pi-Electron Systems, May 2010 Atlanta, USA.

T7. Shankar, Z Li, OK Varghese, X Feng, CM Lin, JE Anthony and CA Grimes, Hybrid Solar Cells from Vertically Oriented TiO2 Nanotube/Nanowire Arrays and Soluble Functionalized Linear Acenes, 2009 Fall Meeting of the Materials Research Society, Boston.

T6. K. Shankar, S. Kim, X.J. Feng, A. Mohammadpour and C.A. Grimes, Enhancement of Photovoltaic Device Performance in Close-Packed Nanowire Excitonic Solar Cells by Forster Resonance Energy Transfer, presented at the 2009 Fall Meeting of the Materials Research Conference, Boston.

T5. Z. Li, J.E. Anthony, K. Shankar, C.A. Grimes, Stephanie Lee, Lynn Loo, Newly Developed Acene-Based Organic Semiconductors for Solar Cell Applications, presented at the 2009 Electronic Materials Conference, State College, PA, June 2009.

T4. [Invited Talk] K.Shankar, X.Feng, O.K. Varghese, G.K. Mor and C.A.Grimes, Infrared Sensitized TiO2 Nanowire and Nanotube Array-Based Solar Cells, presented at the SPIE Optics & Photonics Conference, San Diego, August 2008.

T3. K. Shankar, C.V. Baiocco and T.N. Jackson, Lateral Nanogaps by Vertical Processing, presented at the 2003 Electronic Materials Conference, Salt Lake City, Utah, June 2003.

T2. K. Shankar, C.D. Sheraw, E. Bullock, J.E. Anthony and T.N. Jackson, High Mobility Solution Processed Organic Thin Film Transistors Based on a Soluble Pentacene Derivative, Late News Digest of the 2003 Device Research Conference.

T1. G.K. Mor, Q. Cai, O.K. Varghese, M. Paulose and C.A. Grimes, Effect of Anodization Bath Chemistry on Photochemical Water-Splitting using Titania Nanotubes, K. Shankar, 2004 Fall Meeting of the Materials Research Society, Boston.