nanophys.seas.upenn.eduJohnson Group Experimental Nanoscale Physics - People

Site Menu Home People Research Publications Resources Links Contact Quantum Transport in Nanoscale Systems Our group's interests include transport phenomena (charge, energy, and spin) in nanoscale systems, including carbon nanotubes, graphene, transition metal dichalcogenides, and hybrid nanostructures based on these materials conjugated with proteins, synthetic peptides, and DNA. These systems are of rising interest both from the technological (possible future nanoelectronics!) and fundamental points of view. In order to study the electronic properties, we must first connect nanometer size objects to the outside world. To this end, we use a variety of nanofabrication techniques including photolithography, electron beam lithography, thin film deposition and etching approaches. Much of our work relies on facilities in the University of Pennsylvania Singh Center for Nanotechnology . Once we have a molecular circuit, we measure its properties using a variety of techniques including low-temperature magnetotransport, thermal conductivity measurement, and hybrid scanning probe techniques, that let us measure local electronic properties with nanometer-scale resolution. Johnson Group (May 2014) From left to right: Charlie Johnson, Iksoo Kwon, Pedro Ducos, Jisoo Kang, Chun Zai, John Qi, Rajatesh Gudibande, Nick Kybert, Madeline Diaz-Serrano, Alex Crook, Carl Naylor, Jinglei Ping, Ruben Waldman, William Zhou, Julian Holder Recent News Dr. Carl H. Naylor defended his Ph.D. and will join Intel Graduate student Carl H. Naylor awarded Elias Burstein Prize (04/2017) Graduate student Carl H. Naylor received best oral presentation award at the Graphene 2017 conference (03/2017) Dr. Pedro Ducos defended his Ph.D. will join the Universidad San Francisco Quito Graduate student Carl H. Naylor awarded NBIC Graduate Research Excellence Award (11/2016) Graduate student Carl H. Naylor awarded UPenn Dissertation Completion Fellowship (08/2016) Dr. Nick Kybert defended his Ph.D. and will join Intel Graduate student Nick Kybert awarded Elias Burstein Prize (04/2015) Undergraduate students Ashwin Amurthur and Teddy Guenin wins Y-Prize competition [ LINK ] (02/2015) Prof. Charlie Johnson on PBS NewsHour [ LINK ] (09/2014) Dr. John Qi defened his Ph.D. and will join IBM (08/2014) Prof. Charlie Johnson on Science Friday [ LINK ] and Al Jazeera America news [ LINK ] (05/2014) Graduate student John Qi awarded NSF EAPSI Fellowship (03/2014) Prof. Charlie Johnson appointed as Director of the Nano/Bio Interface Center (07/2013) Graduate students Rajatesh Gudibande and John Qi awarded Penn's GAPSA-Provost Fellowship (05/2013) Dr. Mitch Lerner defened his Ph.D. and will join SPAWAR (04/2013) Graduate student Nick Kybert awarded Penn's Teece Fellowship (04/2013) Graduate student John Qi awarded IBM Ph.D. Fellowship (02/2013) Graduate student John Qi awarded Sigma Xi GIAR Award (12/2012) Graduate student Mitch Lerner awarded the NBIC Graduate Research Award (10/2012) Graduate student Mitch Lerner awarded DoD SMART Scholarship (2012) Dr. Ye Lu defended his Ph.D. and will join Intel Corp. (10/2011) Prof. Charlie Johnson elected as a Fellow of the American Physical Society (09/2011) Dr. Luke Sommers defended his Ph.D. and will join Rutgers University (08/2011) Graduate student John Qi awarded NSF IGERT Fellowship (05/2011) Selected Publications Large-area synthesis of high-quality monolayer 1T'-WTe2 flakes Carl H Naylor, William M Parkin, Zhaoli Gao, Hojin Kang, Mehmet Noyan, Robert B Wexler, Liang Z Tan, Youngkuk Kim, Christopher E Kehayias, Frank Streller, Yu Ren Zhou, Robert Carpick, Zhengtang Luo, Yung Woo Park, Andrew M Rappe, Marija Drndic, James M Kikkawa and A T Charlie Johnson. 2D Materials (2017) Scalable Production of Sensor Arrays based on High Mobility Hybrid Graphene Field Effect Transistors Zhaoli Gao, Hojin Kang, Carl H. Naylor, Frank Streller, Pedro Ducos, Madeline D. Serrano, Jinglei Ping, Jonathan Zauberman, Rajesh, Robert W. Carpick, Ying-Jun Wang, Yung Woo Park, Zhengtang Luo, Li Ren, and A. T. Charlie Johnson. ACS Applied Materials and Interfaces (2016) Scalable Production of High-Sensitivity, Label-Free DNA Biosensors Based on Back-Gated Graphene Field Effect Transistors Jinglei Ping, Ramya Vishnubhotla, Amey Vrudhula, and A. T. Charlie Johnson. ACS Nano (2016) Monolayer Single-Crystal 1T'-MoTe2 Grown by Chemical Vapor Deposition Exhibits Weak Antilocalization Effect Carl H. Naylor, William M. Parkin, Jinglei Ping, Zhaoli Gao, Yu Ren Zhou, Youngkuk Kim, Frank Streller, Robert W. Carpick, Andrew M. Rappe, Marija Drndic, James M. Kikkawa, and A. T. Charlie Johnson. Nanoletters (2016) Scalable Production of Molybdenum Disulfide Based Biosensors Carl H. Naylor, Nicholas J. Kybert, Camilla Schneier, Jin Xi, Gabriela Romero, Jeffery G. Saven, Renyu Liu, and A. T. Charlie Johnson. ACS Nano (2016) Electronic Transport of Recrystallized Freestanding Graphene Nanoribbons Z. J. Qi, C. Daniels, S. J. Hong, Y. W. Park, V. Meunier, M. Drndic, A. T. C. Johnson. ACS Nano (2015) Seeded Growth of Highly Crystalline Molybdenum Disulphide Monolayers at Controlled Locations G. H. Han, N. J. Kybert, C. H. Naylor, B. S. Lee, J. Ping, J. H. Park, J. Kang, S. Y. Lee, Y. H. Lee, R. Agarwal, A. T. C. Johnson. Nature Communications (2015) Electronic Transport in Heterostructures of Chemical Vapor Deposited Graphene and Hexagonal Boron Nitride Z. J. Qi, S. J. Hong, J. A. Rodriguez-Manzo, N. J. Kybert, R. Gudibande, M. Drndic, Y. W. Park, A. T. C. Johnson. Small (2014) Correlating Atomic Structure and Transport in Suspended Graphene Nanoribbons Z. J. Qi, J. A. Rodriguez-Manzo, A. R. Botello-Mendez, S. J. Hong, E. A. Stach, Y. W. Park, J.-C. Charlier, M. Drndic, A. T. C. Johnson. Nano Letters (2014) Scalable Production of Highly Sensitive Nanosensors Based on Graphene Functionalized with a Design G Protein-Coupled Receptor M. B. Lerner, F. Matsunaga, G. H. Han, S. J. Hong, J. Xi, A. Crook, J. M. Perez-Aguilar, Y. W. Park, J. G. Saven, R. Liu, A. T. C. Johnson. Nano Letters (2014) Continuous Growth of Hexagonal Graphene and Boron Nitride In-Plane Heterostructures by Atmospheric Pressure Chemical Vapor Deposition G. H. Han, J. A. Rodriguez-Manzo, C.-W. Lee, N. J. Kybert, M. B. Lerner, Z. J. Qi, E. N. Dattoli, A. M. Rappe, M. Drndic, A. T. C. Johnson. ACS Nano (2013) Differentiation of Complex Vapor Mixtures Using Versatile DNA-Carbon Nanotube Chemical Sensor Arrays N. J. Kybert, M .B. Lerner, J. S. Yodh, G. Preti, A. T. C. Johnson. ACS Nano (201 3 ) Hybrids of a Genetically Engineered Antibody and a Carbon Nanotube Transistor for Detection of Prostate Cancer Biomarkers M. B. Lerner, J. D'Souza, T. Pazina, J. Dailey, B. R. Goldsmith, M. K. Robinson, A. T. C. Johnson. ACS Nano (2012)...