List of Publications
46. R. Boya*, Ashok Keerthi*, M.S. Parambath, “The wonderland of angstrofluidics”, Physics Today, 2024, 77 (8), 26-33 (online: https://doi.org/10.1063/pt.frik.vxpk)
45. R. Qi, Y. You, M. Grzeszczyk, H. Jyothilal, A. Bera, J. Laverock, N. Natera-Cordero, P. Huang, G.-H. Nam, V. G. Kravets, D. Burrow, J. C. Toscano Figueroa, Y. W. Ho, N. A. Fox, A. N. Grigorenko, I. J. Vera-Marun, Ashok Keerthi, M. Koperski*, B. Radha*, “Versatile method for preparing two-dimensional metal dihalides”, ACS Nano, 2024, 18, 22034 – 22044
44. I. A. Zayakin, I. V. Kurganskii, Ashok Keerthi, M. Baumgarten, A. A. Dmitriev, N. P. Gritsan, S. E. Tolstikov, R. Z. Sagdeev, A. A. Korlyukov, E. V. Tretyakov* and M. V. Fedin, “Nitronyl Nitroxyl Diradical with Pyrene Backbone: Synthesis, Quantum Chemical and X/Q-Band EPR Study”, Applied Magnetic Resonance 2024 (online: https://doi.org/10.1007/s00723-024-01703-6)
43. S. Goutham, R. K. Gogoi, H. Jyothilal, G.-H. Nam, A. Ismail, S. Pandey, Ashok Keerthi, B. Radha*, “Electric Field Mediated Unclogging of Angstrom-Scale Channels”, Small Methods, 2024, 2400961. (online: https://doi.org/10.1002/smtd.202400961)
42. V. Sharma, H. Khan, M. Walker, H. Ahmad, A. Thanai, T. Marszalek, D. Schollmeyer, M. Baumgarten, E. W. Evans,, Ashok Keerthi*, "Peri-alkylated terrylenes and ternaphthalenes building-blocks towards multi-edge nanographenes" Chem. Eur. J. 2024, e202401462 (online: https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/chem.202401462).
41. A. Bhardwaj, R. Gogoi, W. J. Howard, E. Tillotson, S. Goutham, Y. You, T. Hashimoto, E. Janzen, J. H. Edgar, S. J. Haigh, Ashok Keerthi, B. Radha, "Ultramicrotomy‐Assisted Fabrication of Nanochannels for Efficient Ion Transport and Energy Generation" Advanced Functional Materials 2024,2401988 (online: https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.202401988).
40. J. Yang, A. A. Papaderakis, J. S. Roh, Ashok Keerthi, R. W. Adams, M. A. Bissett, B. Radha, R. AW. Dryfe, "Measuring the Capacitance of Carbon in Ionic Liquids: From Graphite to Graphene" J. Phys. Chem. C 2024, 128, 9, 3674–3684.
39. E. Tretyakov, D. Gorbunov, N. Gritsan, Ashok Keerthi, M. Baumgarten, D. Schollmeyer, M. Ivanov, A. Sergeeva, M. Fedin, "Synthesis and photoinduced behavior of DPP-anchored nitronyl nitroxides: a multifaceted approach" RSC advances 2024, 14, 6178-6189.
38. F. Meneses, R. Qi, A. J. Healey, Y. You, I. O. Robertson, S. C. Scholten, Ashok Keerthi, G. Harrison, A. Bera, H. Jyothilal, L. CL. Hollenberg, B. Radha, J-P. Tetienne, "Stray magnetic field imaging of thin exfoliated iron halides flakes" Physical Review B, 2024, 109, 064416.
37. A. Bhardwaj, M. V. S. Martins, Y. You, R. Sajja, M. Rimmer, S. Goutham, R. Qi, S. Dar, B. Radha, Ashok Keerthi*, "Fabrication of angstrom-scale two-dimensional channels for mass transport" Nature Protocols, 2024, 19, 240.
36. N. Ronceray, Y. You, E. Glushkov, M. Lihter, B. Rehl, T-H. Chen, G-H. Nam, K. Watanabe, T. Taniguchi, S. Roke, Ashok Keerthi, J. Comtet, B. Radha, A. Radenovic*, ''Liquid-activated quantum emission from native hBN defects for nanofluidic sensing'', Nature Materials, 2023, 22, 1236–1242.
35. A. A. Papaderakis*, A. Ejigu, J. Yang, A. Elgendy, B. Radha, Ashok Keerthi, A. Juel and R. A. W. Dryfe*, ''Anion Intercalation into Graphite Drives Surface Wetting'', Journal of the American Chemical Society, 2023, 145, 8007-8020.
34. S. Goutham, Ashok Keerthi, A. Ismail, A. Bhardwaj, H. Jalali, Y. You, Y. Li, N. Hassani, H. Peng, M. V. S. Martins, F. Wang, M. Neek-Amal and B. Radha*, ''Beyond steric selectivity of ions using angstrom-scale capillaries'', Nature Nanotechnology, 2023, 18, 596–601. (https://arxiv.org/abs/2212.09584)
33. P Robin, T Emmerich, A Ismail, A Niguès, Y You, G-H Nam, Ashok Keerthi, A Siria, AK Geim, B Radha, L Bocquet*, ''Long-term memory and synapse-like dynamics in two-dimensional nanofluidic channels'', Science, 2023, 379, 161-167. (arXiv preprint arXiv:2205.07653).
32. Y. You, A. Ismail, G-H. Nam, S. Goutham, Ashok Keerthi, B. Radha*, ''Angstrofluidics: walking to the limit'', Annual Reviews of Materials Research, 2022, 52, 189-218.
31. T. Emmerich, K.S Vasu, A. Niguès, Ashok Keerthi, B. Radha, A. Siria*, L. Bocquet*, ''Enhanced nanofluidic transport in activated carbon nanoconduits'' Nature Materials, 2022, 21, 696–702.
30. Ashok Keerthi, Solleti Goutham, Yi You, Pawin Iamprasertkun, Robert A. W. Dryfe, Andre K. Geim and Boya Radha* ''Water friction in nanofluidic channels made from two-dimensional crystals'' Nature Communications, 2021, 12 (1), 3092.
29. Ravalika Sajja, Yi You, Solleti Goutham, Rongrong Qi, Alexander Rakowski, Ankit Bhardwaj, Sarah Haigh, Ashok Keerthi, and Boya Radha* ''Hydrocarbon Contamination in Angström-scale Channels'' Nanoscale, 2021, 13 (21), 9553.
28. Wayne Yang, Boya Radha, Adnan Choudhary, Yi You, Gangaiah Mettela, Andre K. Geim, Aleksei Aksimentiev*, Ashok Keerthi*, Cees Dekker* "Translocation of DNA through Ultrathin Nanoslits" Advanced Materials, 2021, 2007682
27. Jothi Priyanka Thiruraman†, Sidra Abbas Dar†, Paul Masih Das, Nasim Hassani, Mehdi Neek-Amal, Ashok Keerthi*, Marija Drndić*, Boya Radha* "Gas flow through atomic-scale apertures" Science Advances, 2020, 6, eabc7927
26. Ashok Keerthi†, Carlos Sánchez-Sánchez†, Okan Deniz, Pascal Ruffieux, Dieter Schollmeyer, Xinliang Feng, Akimitsu Narita, Roman Fasel* and Klaus Müllen* "On-surface Synthesis of a Chiral Graphene Nanoribbon with Mixed Edge Structure" Chemistry an Asian Journal, 2020, 15, 3807-3811
25. Marco Di Giovannantonio†, Ashok Keerthi†, José I. Urgel, Martin Baumgarten, Xinliang Feng, Akimitsu Narita, Roman Fasel and Klaus Mullen “On-surface Dehydro-Diels-Alder reaction of dibromo-bis(phenylethynyl)benzene” Journal of the American Chemical Society, 2020, 142, 1721-1725.
24. J. Loessberg-Zahl, D.S. de Bruijn, W.T.E. van den Beld, E. Dollekamp, E. Grady, Ashok Keerthi, J. Bomer, B. Radha, H.J.W. Zandvliet, A. A. Bol, A. van den Berg, J.C.T. Eijkel “Exploring Voltage Mediated Delamination of Suspended 2D Materials as a Cause of Commonly Observed Breakdown” Journal of Physical Chemistry C, 2020, 124, 430-435.
23. Daniele Rizzo, Deborah Prezzi, Alice Ruini, Vaiva Nagyte, Ashok Keerthi, Akimitsu Narita, Uliana Beser, Yinjuan Huang, Yiyong Mai, Xinliang Feng, Klaus Mullen, Elisa Molinari and Cinzia Casiraghi “Multi-wavelength Raman spectroscopy of ultra-narrow nanoribbons made by solution-mediated bottom-up approach”, Physical Review B, 2019, 100, 045406.
22. Kun Xu, José I. Urgel, Kristjan Eimre, Marco Di Giovannantonio, Ashok Keerthi, Hartmut Komber, Shiyong Wang, Akimitsu Narita, Reinhard Berger, Pascal Ruffieux, Carlo A. Pignedoli, Junzhi Liu, Klaus Müllen, Roman Fasel and Xinliang Feng “On-surface Synthesis of Non-planar Porous Nanographenes” Journal of the American Chemical Society, 2019, 141 (19), 7726-7730.
21. T. Mouterde†, Ashok Keerthi†, A. R. Poggioli, S. A. Dar, A. Siria, A. K. Geim, L. Bocquet and B. Radha “Molecular streaming and voltage gated response in Angstrom scale channels” Nature, 2019, 567, 87-90.
(Highlighted widely in various media outlets e.g., phys.org, physics world, etc.)
(Highlighted widely in various media outlets e.g., phys.org, physics world, etc.)
20. P. Iamprasertkun, W. Hirunpinyopas, Ashok Keerthi, B. Wang, B. Radha, M.A. Bissett, and R.A.W. Dryfe “The Capacitance of Basal Plane and Edge-oriented Highly-ordered Pyrolytic Graphite: Specific ion effects” Journal of Physical Chemistry Letters 2019, 10, 617–623.
19. K. Gopinadhan, S. Hu, A. Esfandiar, M. Lozada-Hidalgo, F. C. Wang, Q. Yang, A. V. Tyurnina, Ashok Keerthi, B. Radha and A. K. Geim “Complete steric exclusion of ions and proton transport through confined monolayer water” Science, 2019, 363, 145-148. (Highlighted widely in various media outlets e.g., chemistry world, phys.org, EurekaAlert.org, etc.)
18. Ashok Keerthi, A. K. Geim, A. Janardanan, A. P. Rooney, S. Hu, A. Esfandiar, S. J. Haigh, F. C. Wang, and B. Radha, “Ballistic molecular transport through two-dimensional channels” Nature, 2018, 558, 420-424. (Highlighted widely in various media outlets e.g., nature news & views, phys.org, physicsworld.com, etc.)
17. Ashok Keerthi*†, W. Waliszewski†, C. An, A. Jaber, D. Xia, K. Müllen, T. Marszalek, W. Pisula and M. Baumgarten “Dithieno[2,3-d;2′,3′-d]benzo[2,1-b:3,4-b']dithiophene Derivatives: Structure-Property Relationships” ACS Omega, 2018, 3, 6513-6522.
16. M. Slota, Ashok Keerthi, W. K. Myers, E. Tretyakov, M. Baumgarten, A. Ardavan, H. Sadeghi, C. J. Lambert, A. Narita, K. Müllen, and L. Bogani “Magnetic edge states and coherent manipulation of molecular graphene nanoribbons” Nature, 2018, 557, 691-695. (Highlighted widely in various media outlets e.g., nature news & views, phys.org, natureasia etc.)
15. Ashok Keerthi, B. Radha, D. Rizzo, H. Lu, Valentin D. Cabanes, I. C.-Y Hou, D. Beljonne, J. Cornil, C. Casiraghi, M. Baumgarten, K. Müllen, and A. Narita “Edge Functionalization of Structurally Defined Graphene Nanoribbons for Modulating the Self-Assembled Structures”, Journal of the American Chemical Society, 2017, 139 (46), 16454–16457.
14. E. Tretyakov†, Ashok Keerthi†, M. Baumgarten, S. Veber, M. Fedin, D. Gorbunov, I. Shundrina, and N. Gritsan “The design of radical stacks: nitronyl nitroxide-substituted heteropentacenes” ChemistryOpen, 2017, 6, 642–652.
13. D. Xia†, Ashok Keerthi†, C. An and M. Baumgarten, “Synthesis of a Quinoidal Dithieno[2,3-d;2’,3’-d]benzo [2,1-b;3,4-b‘]-dithiophene based Open-Shell Singlet Biradical”, Organic Chemistry Frontiers, 2017, 4 (1), 18-21. (Journal cover page)
12. B. Radha, A. Esfandiar, F. C. Wang, A. P. Rooney, K. Gopinadhan, Ashok Keerthi, A. Mishchenko, A. Janardanan, P. Blake, L. Fumagalli, M. Lozada-hidalgo, S. Garaj, S. J. haigh, H. A. Wu, I. V. Grigorieva & A. K. Geim “Molecular transport through capillaries made with atomic-scale precision”, Nature, 2016, 538, 222–225. (Highly cited paper mentioned by ISI web of knowledge as top 1% of the academic field of Chemistry based on a highly cited threshold for the field and publication year)
11. Ashok Keerthi, I. C.-Y Hou, T. Marszalek, W. Pisula, M. Baumgarten and A. Narita “Hexa-peri-hexabenzocoronene with Different Acceptor Units for Tuning Optoelectronic Properties”, Chemistry Asian Journal, 2016, 11 (19), 2710-2714.
10. B. Baudisch, Ashok Keerthi, A. Reiner, J. Reschauer, K. Müllen, and E. Riedle “Pyrene Dynamics: Covalently Linked Dimers Accelerate the Kinetics from ns to ps and Produce Excimers” International Conference on Ultrafast Phenomena, UTh4A. 2016, 11.
9. D. Lorbach†, Ashok Keerthi†, T. M. Figueira-Duarte, M. Baumgarten, M. Wagner and K. Müllen “Cyclization of Pyrene Oligomers: Cyclohexa-1,3-pyrenylene”, Angewante Chemistry International Edition, 2016, 55 (1), 418-421. (Highlighted by T. M. Swager et al., Synfacts, 2016, 12(03), 0254)
8. D. Xia, X. Guo, L. Chen, M. Baumgarten, Ashok Keerthi, K. Müllen “Layered Electron Acceptors by Dimerization of Acenes End- Capped with 1,2,5-Thiadiazoles” Angewante Chemistry International Edition, 2016, 55 (3), 941-944. (Highlighted by T. M. Swager et al., Synfacts, 2016, 12(02), 0145)
7. Ashok Keerthi, C. An, M. Li, T. Marszalek, A. G. Ricciardulli, B. Radha, F. D. Alsewailem, K. Müllen and M. Baumgarten “Dithieno[2,3-d;2′,3′-d]benzo[2,1-b;3,4-b']dithiophene: Novel Building-block for a Planar Copolymer” Polymer Chemistry, 2016, 7, 1545-1548.
6. Ashok Keerthi, M. H. Chua, T. Y. T. Chan, Y. Liu, Q. Wang and S. Valiyaveettil “Synthesis of multi-donor dyes and influence of molecular design on dye-sensitized solar cells”, RSC Advances 2016, 6 (57), 51807-51815.
5. D. Vanga, M. Santra, Ashok Keerthi and S. Valiyaveettil “Synthesis and Photophysical Properties of Pyrene-Based Green Fluorescent Dyes: Butterfly-Shaped Architectures” Organic & Biomolecular Chemistry, 2014, 12, 7914-7918.
4. Ashok Keerthi, D. Sriramulu, Y. Liu, C. T. Y. Timothy, Q. Wang and S. Valiyaveettil, “Architectural influence of carbazole push-pull-pull dyes on dye sensitized solar cells”, Dyes and Pigments, 2013, 99, 787-797.
3. Ashok Keerthi and S. Valiyaveettil, “Regioisomers of Perylenediimide: Synthesis, Photophysical and Electrochemical Properties”, Journal of Physical Chemistry B, 2012, 116 (15), 4603–4614.
2. Ashok Keerthi, Y. Liu, Q. Wang and S. Valiyaveettil, “Synthesis of Perylene Dyes with Multiple Triphenylamine Substituents”, Chemistry a European Journal, 2012, 18, 11669 –11676.
1. G. Balaji, T. S. Kale, Ashok Keerthi, A. M. D. Pelle, S. Thayumanavan, and S. Valiyaveettil, “Low Band Gap Thiophene−Perylene Diimide Systems with Tunable Charge Transport Properties”, Organic Letters, 2011, 13 (1), 18-21.
