Publications

Our latest publications can also be found on my Google scholar profile.

Journal Papers

M. K. Idris, P. Naderi, G. W. Melenka and G. Grau, “Damage Location Sensing in Carbon Fiber Composites Using Extrusion Printed Electronics,” Functional Composites and Structures, vol. 3, no. 4, 045001, 2021. doi: 10.1088/2631-6331/ac3731 pdf

M. Tavakkoli Gilavan, M. S. Rahman, A. M. Khan, S. Nambi and G. Grau, “One-step fabrication of low resistance conductors on 3D printed structures by laser-induced graphene (LIG),” ACS Applied Electronic Materials, vol. 3, no. 9, pp. 3867-3875, 2021. doi: 10.1021/acsaelm.1c00480 pdf

F. P. Brishty and G. Grau, “Machine Vision Methodology for Inkjet Printing Drop Sequence Generation and Validation,” Flexible and Printed Electronics, vol. 6, no. 3, 035009, 2021. doi: 10.1088/2058-8585/ac1c5c pdf

A. Minhas-Khan, S. Nambi and G. Grau, “Low-Resistance Laser-Induced Graphitic Carbon by Maximizing Energy Delivery and Pulse Overlap,” Carbon, vol. 181, pp. 310-322, 2021. doi: 10.1016/j.carbon.2021.05.037 pdf

Invited Y. Bonnassieux, C. J. Brabec, Y. Cao, T. B. Carmichael, M. L. Chabinyc, K.-T. Cheng, G. Cho, A. Chung, C. L. Cobb, A. Distler, H.-J. Egelhaaf, G. Grau, X. Guo, G. Haghiashtiani, T.-C. Huang, M. M. Hussain, B. Iniguez, T. Lee, L. Li, Y. Ma, D. Ma, M. C. McAlpine, T. N. Ng, R. Österbacka, S. N. Patel, J. Peng, H. Peng, J. Rivnay, L. Shao, D. Steingart, R. A. Street, V. Subramanian, L. Torsi, Y. Wu, “The 2021 Flexible and Printed Electronics Roadmap,” Flexible and Printed Electronics, vol. 6, no. 2, 023001, 2021. doi: 10.1088/2058-8585/abf986 pdf

T. Yousefi, M. Taghadosi, A. Dabbaghian, R. Siu, G. Grau, G. Zoidl and H. Kassiri, “An Energy-Efficient Optically-Enhanced Highly-Linear Implantable Wireless Bidirectional Optogenetic Neuro-Stimulator,” IEEE Transactions on Biomedical Circuits and Systems, vol. 14, no. 6, pp. 1274-1286, 2020. doi: 10.1109/TBCAS.2020.3026937

M. S. Rahman, M. Shahzadeh, M. Rahman, S. Pisana and G. Grau, “High-Speed Contactless Sintering Characterization for Printed Electronics by Frequency-Domain Thermoreflectance,” Flexible and Printed Electronics, vol. 5, no. 3, 035006, 2020. doi: 10.1088/2058-8585/aba8ea pdf

M. S. Rahman and G. Grau, “Direct Writing of Stretchable Metal Flake Conductors: Improved Stretchability and Conductivity by Combining Differently Sintered Materials,” Flexible and Printed Electronics, 2020. doi: 10.1088/2058-8585/ab8f22 10.1088/2631-8695/ab8e24 pdf

J. Qiu, M. K. Idris, G. Grau and G. W. Melenka, “Fabrication of Electroluminescent Carbon Fiber Composite for Damage Visualization,” Manufacturing Letters, vol. 24, pp. 56-60, 2020. doi: 10.1016/j.mfglet.2020.03.010 pdf

Invited G. Grau and V. Subramanian, “Dimensional scaling of high-speed printed organic transistors enabling high-frequency operation,” Flexible and Printed Electronics, vol. 5, no. 1, 014013, 2020. doi: 10.1088/2058-8585/ab739a pdf

R. Abunahla, M. S. Rahman, P. Naderi and G. Grau, “Inkjet Printing Without Bulges: A Segmented and Symmetric Drop Placement Method,” Journal of Micro- and Nano-Manufacturing, vol. 8, no. 3, 031001, 2020. doi: 10.1115/1.4046482 pdf

G. Grau, E. Frazier and V. Subramanian, “Printed unmanned aerial vehicles (UAV) using paper based electroactive polymer actuators and organic ion gel transistors,” Microsystems & Nanoengineering, vol. 2, 16032, 2016. doi: 10.1038/micronano.2016.32 pdf

Invited G. Grau, J. Cen, H. Kang, R. Kitsomboonloha, W. J. Scheideler and V. Subramanian, “Gravure-printed electronics: Recent progress in tooling development, understanding of printing physics, and realization of printed devices,” Flexible and Printed Electronics, vol. 1, no. 2, 023002, 2016. doi: 10.1088/2058-8585/1/2/023002 pdf

D. Hariprasad, G. Grau, R. Schunk and K. Tjiptowidjojo, “A computational model for doctoring fluid films in gravure printing,” Journal of Applied Physics, vol. 119, 135303, 2016. doi: 10.1063/1.4945030

G. Grau and V. Subramanian, “Fully High-Speed Gravure Printed, Low-Variability, High-Performance Organic Polymer Transistors with Sub-5V Operation,” Advanced Electronic Materials, vol. 2, no. 4, 1500328, 2016. doi: 10.1002/aelm.201500328 pdf

A. Zeumault, W. J. Scheideler, G. Grau, J. Smith and V. Subramanian, „Patterning of Solution-Processed, Indium-Free Oxide TFTs by Selective Spray Pyrolysis,” Advanced Electronic Materials, vol. 2, no. 2, 1500326, 2016. doi: 10.1002/aelm.201500326

R. Kitsomboonloha, H. Kang, G. Grau, W. J. Scheideler and V. Subramanian, „Misalignment-tolerant high-resolution gravure printed top-gate organic thin film transistors on plastic: breaking the 1MHz barrier,” Advanced Electronic Materials, vol. 1, no. 12, 1500155, 2015. doi: 10.1002/aelm.201500155

G. Grau, R. Kitsomboonloha, H. Kang, and V. Subramanian, “High performance printed organic transistors using a novel scanned thermal annealing technology,” Organic Electronics, vol. 20, pp. 150–157, 2015. doi: 10.1016/j.orgel.2015.02.019 pdf

Invited V. Subramanian, J. Cen, A. de la Fuente Vornbrock, G. Grau, H. Kang, R. Kitsomboonloha, D. Soltman, H.-Y. Tseng, “High-speed printing of transistors: From Inks to Devices,” Proceedings of the IEEE, vol. 103, no. 4, pp. 567–582, Apr. 2015. doi: 10.1109/JPROC.2015.2408321

H. Kang, R. Kitsomboonloha, K. Ulmer, L. Stecker, G. Grau, J. Jang and V. Subramanian, “Megahertz-class printed high mobility organic thin-film transistors and inverters on plastic using attoliter-scale high-speed gravure-printed sub-5 µm gate electrodes,” Organic Electronics, vol. 15, no. 12, pp. 3639–3647, 2014. doi: 10.1016/j.orgel.2014.10.005

G. Grau, R. Kitsomboonloha, S. L. Swisher, H. Kang, and V. Subramanian, “Printed Transistors on Paper: Towards Smart Consumer Product Packaging,” Advanced Functional Materials, vol. 24, no. 32, pp. 5067–5074, 2014. doi: 10.1002/adfm.201400129 pdf

Conferences

Invited G. Grau, M. K. Idris and J. Qiu, “Smart Carbon Fiber Composite Structures Utilizing Printed Electronics,” American Association for Advances in Functional Materials (AAAFM)-UCLA International Conference, virtual, 2021.

P. Naderi and G. Grau, “Effect of Annealing Printed Electrodes on Gate Dielectric Hydrophobicity and Device Performance in Organic Transistors,” talk, 63rd Electronic Materials Conference (EMC), virtual, 2021.

J. Qiu, M. K. Idris, G. Grau and G. W. Melenka, ”Structural Health Monitoring through Electroluminescent Strain Sensing Carbon Fiber Reinforced Polymer,” talk, Society for the Advancement of Material and Process Engineering (SAMPE) neXus, virtual, 2021.

M. Ghalamboran, P. Naderi and G. Grau, “Resistance variations for different pattern designs of printed conductors due to non-uniform ink drying,“ talk, Materials Research Society (MRS) Spring Meeting, virtual, 2021.

M. S. Rahman, M. Shahzadeh, S. Pisana and G. Grau, “Thermoreflectance as a Non-Contact Characterization Method for Low-Cost Printed and Flash Sintered Metal Nanoparticle Conductors,” talk, 20th IEEE International Conference on Nanotechnology, virtual, 2020.

M. Tavakkoli Gilavan and G. Grau, “Laser-induced graphene strain sensors on 3D printed structures,” talk, 20th IEEE International Conference on Nanotechnology, virtual, 2020.

T. Yousefi, M. Taghadosi, A. Dabbaghian, R. Siu, G. Grau, G. Zoidl and H. Kassiri, “A 12.5mg mm-Scale Inductively-Powered Light-Directivity-Enhanced Highly-Linear Bidirectional Optogenetic Neuro-Stimulator,” talk, IEEE Custom Integrated Circuits Conference (CICC), pp. 1-4, Boston, MA, 2020. doi: 10.1109/CICC48029.2020.9075932

F. P. Brishty, R. Urner and G. Grau, “Machine Learning Based Data Driven Approach for Optimized Inkjet Printed Electronics,” poster, Materials Research Society (MRS) Fall Meeting, Boston, MA, 2019.

Invited G. Grau, A. M. Khan, M. Tavakkoli Gilavan, S. Nambi, and M. S. Rahman, “Laser-induced graphene for flexible electronics: Morphology control and resistance minimization,” Nano Ontario Conference, Toronto, ON, 2019.

A. M. Khan and G. Grau, “Capacity enhancement of low-cost and flexible micro-supercapacitors by a redox-active electrolyte and laser-induced fibrous graphene,” talk, 236th Electrochemical Society (ECS) Meeting, Atlanta, GA, 2019.

G. Grau, M. K. Idris and J. Qiu, “Printed Electronics integrated with carbon fiber composites,” talk, Society for Imaging Science and Technology (IS&T) Printing for Fabrication Conference, San Francisco, CA, 2019.

J. Qiu, M. K. Idris, G. Grau and G. W. Melenka, “Visualizing Structural Health Monitoring of Carbon Fiber Composites through Electroluminescence,” talk, Canadian International Conference on Composite Materials (CANCOM), Kelowna, BC, 2019.

G. Grau, J. Qiu, M. K. Idris and L. Pinto, “Carbon fiber electronics: Creating multifunctional materials using low-cost fabrication,” talk, 61st Electronic Materials Conference (EMC), Ann Arbor, MI, 2019.

M. K. Idris, J. Qiu, G. W. Melenka and G. Grau, “Smart carbon fiber sheets for 2D structural health monitoring of composites,” talk, Materials Research Society (MRS) Spring Meeting, Phoenix, AZ, 2019.

M. S. Rahman, M. Rahman, S. Pisana and G. Grau, “Effect of sintering conditions on the thermal properties of printable metal nanoparticle ink studied by thermoreflectance,” talk, Proc. SPIE 11089, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVI, 110890U, pp. 1-7, SPIE Optics + Photonics, San Diego, CA, 2019. doi: 10.1117/12.2529763 pdf

R. Abunahla and G. Grau, “Optimized Inkjet-Printed Line Morphology by a Novel Segmented Drop Placement Method,” talk, Materials Research Society (MRS) Spring Meeting, Phoenix, 2018.

Invited G. Grau, “Low-cost fabrication of paper-based systems: microfluidics, sensors, electronics and deployment,” talk, IEEE International Midwest Symposium on Circuits and Systems, Boston, 2017. doi: 10.1109/MWSCAS.2017.8052866

G. Grau, W. J. Scheideler and V. Subramanian, “Fluid mechanical proximity effects in high-resolution gravure printing for printed electronics,” talk, 69th Annual Meeting of the APS Division of Fluid Dynamics, Portland, 2016.

Invited V. Subramanian, S. Chung, G. Grau and W. J. Scheideler, “Printed Transistors and MEMS for Large-Area Electronics,” talk, SID Symposium Digest of Technical Papers, vol. 47, no. 1, pp. 956-959, 2016. doi: 10.1002/sdtp.10885

W. J. Scheideler, G. Grau and V. Subramanian, “Designing Inorganic Sol-gel Metal Oxide Inks for Gravure Printed Transparent, High-Performance Electronics,” talk, LOPE-C, Munich, 2016.

G. Grau and V. Subramanian, “Fully High-Speed Gravure Printed, High-Performance Organic Transistors with Sub-5V Operation,” talk, MRS Fall Meeting, Boston, 2015.

G. Grau, W. J. Scheideler and V. Subramanian, “High-resolution gravure printed lines: Proximity effects and design rules,” talk, Proc. SPIE 9569, 95690B-1, SPIE Optics + Photonics, 2015. doi: 10.1117/12.2187274 pdf

G. Grau, R. Kitsomboonloha and V. Subramanian, “Fabrication of a high-resolution roll for gravure printing of 2µm features,” talk, Proc SPIE 9568, 95680M, SPIE Optics + Photonics, 2015. doi: 10.1117/12.2187280 pdf

Invited V. Subramanian, R. Kitsomboonloha, J. Cen, H. Kang, G. Grau, and W. J. Scheideler, “High-resolution gravure printing of organic thin film transistors for high-performance printed electronic systems,” talk, MRS Fall Meeting, Boston, 2014.

G. Grau, R. Kitsomboonloha, H. Kang, and V. Subramanian, “High performance printed organic transistors using a novel scanned thermal annealing technology,” talk, LOPE-C, Munich, 2014.

G. Grau and V. Subramanian, “Effect of substrate roughness on the performance of printed OTFTs on paper substrates,” poster, MRS Fall Meeting, Boston, 2013.

G. Grau, R. Kitsomboonloha, S. L. Swisher, H. Kang, and V. Subramanian, “Printed Transistors on Paper: Towards Smart Consumer Product Packaging,” talk, LOPE-C, Munich, 2013.