Xu Group

Iontronics and Nanoelectronics Lab at RIT

Google Scholar: As of March 2024, h-index = 17, i10-index = 20; Total citations: 1170

ORCID: orcid.org/0000-0003-2692-1935

Notations: (Bold) Xu Group Member, ^▽undergraduate student, ^✉corresponding author.

Journal Publications

28. Seitz, Matthew, Jacob Boisvere, Bryan Melanson, John Wyatt Morrell, Nithil Harris Manimaran, Ke Xu, and Jing Zhang. “Analytical study of KOH wet etch surface passivation for III-nitride micropillars.” iScience 27, no. 4 (2024)..

27. Awate, Shubham Sukumar, Ke Xu, Jierui Liang, Benjamin Katz, Ryan Muzzio, Vincent H. Crespi, Jyoti Katoch, and Susan K. Fullerton-Shirey. “Strain-Induced 2H to 1T′ Phase Transition in Suspended MoTe2 Using Electric Double Layer Gating.” ACS nano 17, no.22 (2023): 22388-22398.

26. Awate, Shubham Sukumar, Brendan Mostek, Shalini Kumari, Chengye Dong, Joshua A. Robinson, Ke Xu, and Susan K. Fullerton-Shirey. “Impact of Large Gate Voltages and Ultrathin Polymer Electrolytes on Carrier Density in Electric-Double-Layer-Gated Two-Dimensional Crystal Transistors.” ACS Applied Materials & Interfaces 15, no. 12 (2023): 15785-15796.

25. Sun, Zheng, Ke Xu, Chang Liu, Jonathan Beaumariage, Jierui Liang, Susan K. Fullerton-Shirey, Zhe-Yu Shi, Jian Wu, and David Snoke. “Photoluminescence Switching Effect in a Two-Dimensional Atomic Crystal.” ACS nano 15, no. 12 (2021): 19439-19445.

24. Woeppel, Aaron,^▽ Ke Xu,^✉ Azimkhan Kozhakhmetov, Shubham Awate, Joshua A. Robinson, and Susan K. Fullerton-Shirey.^✉ “Single-versus Dual-Ion Conductors for Electric Double Layer Gating: Finite Element Modeling and Hall-Effect Measurements.” ACS Applied Materials & Interfaces 12, no. 36 (2020): 40850-40858.

23. Lin, Yu‐Chuan, Brian M. Bersch, Rafik Addou, Ke Xu, Qingxiao Wang, Christopher M. Smyth, Bhakti Jariwala et al. “Modification of the Electronic Transport in Atomically Thin WSe2 by Oxidation.” Advanced Materials Interfaces 7, no. 18 (2020): 2000422.

22. Xu, Ke,^✉ and Susan K. Fullerton-Shirey.^✉ “Electric-double-layer-gated transistors based on two-dimensional crystals: recent approaches and advances.” Journal of Physics: Materials 3, no. 3 (2020): 032001.

21. Subramanian, Shruti, Ke Xu, Yuanxi Wang, Simon Moser, Nicholas A. Simonson, Donna Deng, Vincent H. Crespi, Susan K. Fullerton-Shirey, and Joshua A. Robinson. “Tuning transport across MoS2/graphene interfaces via as-grown lateral heterostructures.” npj 2D Materials and Applications 4, no. 1 (2020): 9.

20. Liang, Jierui, Ke Xu,^✉ Swati Arora, Jennifer E. Laaser, and Susan K. Fullerton-Shirey^✉. “Ion-locking in solid polymer electrolytes for reconfigurable gateless lateral graphene pn junctions.” Materials 13, no. 5 (2020): 1089.

19. Chao, Zhongmou, Kutay B. Sezginel, Ke Xu, Garrison M. Crouch, Abigale E. Gray, Christopher E. Wilmer, Paul W. Bohn, David B. Go, and Susan K. Fullerton‐Shirey. “Silver Nanofilament Formation Dynamics in a Polymer‐Ionic Liquid Thin Film by Direct Write.” Advanced functional materials 30, no. 6 (2020): 1907950.

18. Liang, Jierui, Ke Xu,^✉ Maokun Wu, Benjamin M. Hunt, Wei-Hua Wang, Kyeongjae Cho, and Susan K. Fullerton-Shirey.^✉ “Molecularly Thin Electrolyte for All Solid-State Nonvolatile Two-Dimensional Crystal Memory.” Nano Letters 19, no. 12 (2019): 8911–19.

17. Kozhakhmetov, Azimkhan, Joseph R. Nasr, Fu Zhang, Ke Xu, Natalie C. Briggs, Rafik Addou, Robert Wallace et al. “Scalable BEOL compatible 2D tungsten diselenide.” 2D Materials 7, no. 1 (2019): 015029.

16. Sun, Zheng, Jonathan Beaumariage, Ke Xu, Jierui Liang, Shaocong Hou, Stephen R. Forrest, Susan K. Fullerton-Shirey, and David W. Snoke. “Electric-field-induced optical hysteresis in single-layer WSe2.” Applied Physics Letters 115, no. 16 (2019).

15. Xu, Ke,^✉ Jierui Liang, Aaron Woeppel,^▽ M. Eli Bostian, Hangjun Ding, Zhongmou Chao, James R. McKone, Eric J. Beckman, and Susan K. Fullerton-Shirey^✉. “Electric double-layer gating of two-dimensional field-effect transistors using a single-ion conductor.” ACS applied materials & interfaces 11, no. 39 (2019): 35879-35887.

14. Liang, Jierui, Ke Xu,^✉ Blaec Toncini,^▽ Brian Bersch, Bhakti Jariwala, Yu‐Chuan Lin, Joshua Robinson, and Susan K. Fullerton‐Shirey^✉. “Impact of post‐lithography polymer residue on the electrical characteristics of MoS2 and WSe2 field effect transistors.” Advanced Materials Interfaces 6, no. 3 (2019): 1801321. Selected as Top Downloaded Papers (2019 WILEY)

13. Xu, Ke, Md Mahbubul Islam, David Guzman, Alan C. Seabaugh, Alejandro Strachan, and Susan K. Fullerton-Shirey. “Pulse dynamics of electric double layer formation on all-solid-state graphene field-effect transistors.” ACS Applied Materials & Interfaces 10, no. 49 (2018): 43166-43176.

12. Zhang, Kehao, Brian M. Bersch, Fu Zhang, Natalie C. Briggs, Shruti Subramanian, Ke Xu, Mikhail Chubarov et al. “Considerations for utilizing sodium chloride in epitaxial molybdenum disulfide.” ACS applied materials & interfaces 10, no. 47 (2018): 40831-40837.

11. Chao, Zhongmou, Brian P. Radka, Ke Xu, Garrison M. Crouch, Donghoon Han, David B. Go, Paul W. Bohn, and Susan K. Fullerton‐Shirey. “Direct‐Write Formation and Dissolution of Silver Nanofilaments in Ionic Liquid‐Polymer Electrolyte Composites.” Small 14, no. 39 (2018): 1802023.

10. Lan, Yi, Sidra Farid, Xenia Meshik, Ke Xu, Min Choi, Saadia Ranginwala, Yung Yu Wang, Peter Burke, Mitra Dutta, and Michael A. Stroscio. “Detection of immunoglobulin E with a graphene-based field-effect transistor aptasensor.” Journal of Sensors 2018 (2018).

9. Zhang, Kehao, Brian M. Bersch, Jaydeep Joshi, Rafik Addou, Christopher R. Cormier, Chenxi Zhang, Ke Xu et al. “Tuning the electronic and photonic properties of monolayer MoS2 via in situ rhenium substitutional doping.” Advanced Functional Materials 28, no. 16 (2018): 1706950.

8. Lin, Yu-Chuan, Bhakti Jariwala, Brian M. Bersch, Ke Xu, Yifan Nie, Baoming Wang, Sarah M. Eichfeld et al. “Realizing large-scale, electronic-grade two-dimensional semiconductors.” ACS nano 12, no. 2 (2018): 965-975.

7. Xu, Ke, Hao Lu, Erich W. Kinder, Alan Seabaugh, and Susan K. Fullerton-Shirey. “Monolayer solid-state electrolyte for electric double layer gating of graphene field-effect transistors.” ACS nano 11, no. 6 (2017): 5453-5464.

6. Subramanian, Shruti, Donna D. Deng, Ke Xu, Nicholas Simonson, Ke Wang, Kehao Zhang, Jun Li, Randall Feenstra, Susan K. Fullerton-Shirey, and Joshua A. Robinson. “Properties of synthetic epitaxial graphene/molybdenum disulfide lateral heterostructures.” Carbon 125 (2017): 551-556.

5. Li, Hua-Min, Ke Xu, Buchanan Bourdon, Hao Lu, Yu-Chuan Lin, Joshua A. Robinson, Alan C. Seabaugh, and Susan K. Fullerton-Shirey. “Electric double layer dynamics in poly (ethylene oxide) LiClO4 on graphene transistors.” The Journal of Physical Chemistry C 121, no. 31 (2017): 16996-17004.

4. Zhang, Kehao, Nicholas J. Borys, Brian M. Bersch, Ganesh R. Bhimanapati, Ke Xu, Baoming Wang, Ke Wang et al. “Deconvoluting the photonic and electronic response of 2D materials: the case of MoS2.” Scientific reports 7, no. 1 (2017): 16938.

3. Xu, Ke, Xenia Meshik, Barbara M. Nichols, Eugene Zakar, Mitra Dutta, and Michael A. Stroscio. “Graphene-and aptamer-based electrochemical biosensor.” Nanotechnology 25, no. 20 (2014): 205501.

2. Meshik, Xenia, Ke Xu, Mitra Dutta, and Michael A. Stroscio. “Optical detection of lead and potassium ions using a quantum-dot-based aptamer nanosensor.” IEEE transactions on nanobioscience 13, no. 2 (2014): 161-164.

1. Xu, Ke, Danilo Erricolo, Mitra Dutta, and Michael A. Stroscio. “Electrical conductivity and dielectric properties of PMMA/graphite nanoplatelet ensembles.” Superlattices and Microstructures 51, no. 5 (2012): 606-612.

Book Chapters

3. Xu, Ke, Preeti Pratap, Mitra Dutta, and Michael Stroscio. “Design and Applications of Graphene-based and Biomolecule-based Nanosensors and Nanodevices.” Graphene Science Handbook: Applications and Industrialization (2016): pp. 3-12. CRC Press, 2016

2. Xu, Ke, Mohsen Purahmad, Kimber Brenneman, Xenia Meshik, Sidra Farid, Shripriya Poduri, Preeti Pratap et al. “Design and applications of nanomaterial-based and biomolecule-based nanodevices and nanosensors.” Challenges and Advances in Computational Chemistry and Physics (2014): 61-97. Springer, 2014

1. Dutta, Mitra, Michael A. Stroscio, Jun Qian, Tsai-Chin Wu, Banani Sen, Nanzhu Zhang, Kimber Brenneman, Ke Xu, et al. “Semiconductor Quantum Dots: Nanosensors Based on DNA and RNA Aptamers.” In Dekker Encyclopedia of Nanoscience and Nanotechnology, Seven Volume Set, pp. 4383-4389. CRC Press, 2014.

Conference Proceedings

6. Subramania, Shruti, Ke Xu, Simon K. Moser, Donna Deng, Jun Li, Randall M. Feenstra, Susan K. Fullerton-Shirey, and Joshua A. Robinson. “Engineering pn junctions in graphene/molybdenum disulfide heterostructures.” In 2019 Device Research Conference (DRC), pp. 83-84. IEEE, 2019.

5. Xu, Ke, Tao Chu, Buchanan Bourdon, Alan Seabaugh, Zhihong Chen, and Susan Fullerton-Shirey. “Reconfigurable pn junction formation and bandgap opening in bilayer graphene using polyethylene oxide and CsClO 4 solid polymer electrolyte.” In 2015 73rd Annual Device Research Conference (DRC), pp. 173-174. IEEE, 2015.

4. Xu, Ke, Xenia Meshik, Min Choi, Mitra Dutta, Michael Stroscio, Tsai-Chin Wu, Masudur Rahman, and Michael Norton. “Study of electric field caused by semiconductor quantum dots in close proximity to DNA origami.” In 2014 International Workshop on Computational Electronics (IWCE), pp. 1-4. IEEE, 2014.

3. Meshik, Xenia, Kimber Brenneman, Ke Xu, Saadia Ranginwala, Justin Abell, Yiping Zhao, Mitra Dutta, and Michael Stroscio. “Surface-enhanced Raman spectroscopy signatures of an RNA molecule: An aptamer that binds to αvβ3 integrin.” In AIP Conference Proceedings, vol. 1506, no. 1, pp. 49-52. American Institute of Physics, 2012.

2. Xu, Ke, Justin Abell, Yiping Zhao, Jun Qian, Kimber Brenneman, Xenia Meshik, Mitra Dutta, and Michael Stroscio. “Surface-enhanced Raman spectroscopy as a tool for characterizing nanostructures containing molecular components.” In AIP Conference Proceedings, vol. 1506, no. 1, pp. 57-61. American Institute of Physics, 2012.

1. Brenneman, Kimber L., Justin Abell, Xenia Meshik, Ke Xu, Yiping Zhao, Mitra Dutta, and Michael A. Stroscio. “Surface-enhanced Raman spectroscopy study of single stranded DNA sequences on silver nanorod array.” In AIP Conference Proceedings, vol. 1506, no. 1, pp. 53-56. American Institute of Physics, 2012.