alan t. charlie johnson is an american physicist, professor of physics and astronomy at the university of pennsylvania, and the director of the nano/bio interface center at the university of pennsylvania.johnson's research spans experimental nanoscale physics, combining nanotechnology and biophysics.his research is involved specifically in transport within nanostructures and carbon nanotubes, which revolves around graphene, dna, synthetic proteins, and other biomolecules.his research also involves the development of scanning probe techniques to measure electronic properties in nanomaterials and nanodevices.johnson is also the founding executive editor of aip advances and the co-founder of graphene frontiers, llc.in physics from stanford university in 1984 before going on to earn his ph.d. in physics from harvard in 1990, under the supervision of michael tinkham.his thesis was entitled 'effect of leads and quantum fluctuations on small superconducting tunnel junctions.'during his time at harvard, johnson worked as a research assistant, where he started working on nanodevices.he served as a post-doctoral fellow at delft university of technology in the netherlands from 1990 to 1992 before working as a post-doc fellow at national institute of standards and technology in boulder, colorado.he was promoted from assistant professor to associate professor in 2001.in 2002, johnson received two secondary appointments in the school of engineering, an appointment in electrical and systems engineering and an appointment in materials science and engineering.in 2008, he received a full professorship.johnson served as the associate chair for undergraduate affairs from 2005 to 2011.since 2011, he has been the associate chair of graduate affairs.since he began working at penn, johnson has taught both undergraduate and graduate-level courses.these courses range from introductory physics to advanced statistical mechanics and thermodynamics.he summarizes his research in his cv, which is available on his website:  my research interests include transport phenomena (charge, energy, and spin) in nanoscale systems, including carbon nanotubes and graphene, and hybrid nanostructures based on these materials conjugated with proteins, synthetic peptides, and dna.recent research accomplishments include the creation of bio-inspired vapor sensors based on carbon nanotube transistors functionalized with mammalian olfactory receptors.crystallographic etching of graphene.large-scale production of very large graphene oxide membranes.demonstration of feedback controlled electromigration, an atomically precise fabrication method for nanogap contacts for molecular electronics (patent pending).the invention of a dna/nanotube gas sensor appropriate for use in an electronic nose system (patent awarded), and quantitative comparison of experiment with all-atom molecular dynamics simulation.development of a quantitative theory of scanning conductance microscopy, including a demonstration of direct measurement of the dielectric constant of a polymer nanowire.quantitative characterization of individual defects in a nanotube device.first fabrication of air-stable, n-type nanotube field effect transistors.design and demonstration of a nanotube memory cell.discovery and control of the schottky barriers in carbon nanotube field-effect transistors using scanning gate microscopy.first observation of the impurity-induced conversion of a nanotube fet into a nanotube diode, and elucidation of the mechanism.demonstration of 20nm channel nanotube fets and quantum dots.discovery of 1-dimensional quantized phonon subbands in nanotubes.the first production of nanotube-epoxy composite materials for thermal management (patent pending).fabrication of “nanogap” electrical contacts for molecular electronic circuits (patent awarded).johnson has received over 25 grants for his research, given 97 talks related to his work, and supervised over 120 students in conducting research.he has been an author or co-author on over 140 papers, and received 9 patents.as director of the nano/bio interface center at penn, johnson oversees all research conducted therein, but is the principal investigator for the biomolecular optoelectronic function project.this project is aimed at using organic and inorganic nanostructures to control energy transfer between various pieces of nanotechnology.
at charlie johnson | doctoraladvisor | michael tinkham
no related information