nanophys.seas.upenn.eduCharlie Johnson Group – Experimental Nanoscale Physics

Contact Lab Activities People Publications Recent Publications Extreme mechanical tunability in suspended MoS 2 resonator controlled by Joule heating (2023) Metal-insulator crossover in monolayer MoS2 (2023) Label-free detection of synthetic, full genomic length HIV-1 RNA at the few copy level (2023) Highly stable integration of graphene Hall sensors on a microflucidic platform for magnetic sensing in whole blood (2023) See More Recent News July 28, 2023 – Former Charlie Johnson Group Member and Founder of Q-CTRL Michael Biercuk Featured in NY Times article July 20, 2023 – Clean Room-ing then Cleaning Up July 18, 2023 – Celebrating Chengyu’s Defense at Jane G’s Dim Sum House! Top Row (left to right): Venkateswara Rao Sodisetti, Ye Yang, Umesh Mogera, Celia Morral, Charlie Johnson, Tete Yin, Chengyu Wen. Bottom row (left to right): Yeonjoon Suh, Nikita Gupta, Shiny Shen, Bonnie Chen, Yue Jiang.Our group’s interests include transport phenomena (charge, energy, and spin) in nanoscale systems, including carbon nanotubes, graphene, transition metal dichalcogenides, and hybrid nano-structures 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 magneto-transport, thermal conductivity measurement, and hybrid scanning probe techniques, that let us measure local electronic properties with nanometer-scale resolution. Prof. Alan T. Charlie Johnson, Jr. University of Pennsylvania Department of Physics and Astronomy David Rittenhouse Laboratories 209 S 33rd Street Philadelphia, PA 19104 Email: cjohnson@physics.upenn.edu Find us in David Rittenhouse Labs, Room...