D
Dawn A. Bonnell
Researcher at University of Pennsylvania
Publications - 228
Citations - 7689
Dawn A. Bonnell is an academic researcher from University of Pennsylvania. The author has contributed to research in topics: Scanning tunneling microscope & Scanning probe microscopy. The author has an hindex of 44, co-authored 228 publications receiving 7321 citations. Previous affiliations of Dawn A. Bonnell include UPRRP College of Natural Sciences & Dresden University of Technology.
Papers
More filters
Journal ArticleDOI
Imaging mechanism of piezoresponse force microscopy of ferroelectric surfaces
TL;DR: In this paper, the authors derived analytical descriptions of the complex interactions between a small tip and ferroelectric surface for several sets of limiting conditions, and used these results to construct ''piezoresponse contrast mechanism maps'' that correlate the imaging conditions with the PFM contrast mechanisms.
Journal ArticleDOI
Local potential and polarization screening on ferroelectric surfaces
TL;DR: In this paper, the authors applied electron microscopy and scanning surface potential microscopy to study force gradient and surface potential on the surface of a double layer due to the complete screening of polarization charge.
Journal ArticleDOI
Controlled fabrication of nanogaps in ambient environment for molecular electronics
Douglas R. Strachan,Deirdre E. Smith,Danvers E. Johnston,Tae Hong Park,Michael J. Therien,Dawn A. Bonnell,Alan T. Johnson +6 more
TL;DR: In this paper, a controlled and highly reproducible method of making nanometer-spaced electrodes using electromigration in ambient lab conditions was developed, which yields gaps of desired tunneling resistance, as opposed to the random formation at liquidhelium temperatures.
Journal ArticleDOI
Atomic Polarization and Local Reactivity on Ferroelectric Surfaces: A New Route toward Complex Nanostructures
Sergei V. Kalinin,Dawn A. Bonnell,Tony Alvarez,X. Lei,Zonghai Hu,J. H. Ferris,Qi Zhang,Steve Dunn +7 more
TL;DR: In this paper, photo reduction is used to produce metal nanoparticles in predefined locations on an oxide substrate, and organic molecules are reacted selectively to the particles, which can be repeated to develop complex structures consisting of nanosized elements of semiconductors, metals, or functional organic molecules.
Journal ArticleDOI
Piezoresponse Force Microscopy: A Window into Electromechanical Behavior at the Nanoscale
TL;DR: In this paper, the authors review recent progress in this field that demonstrates great potential of PFM for the investigation of static and dynamic properties of ferroelectric domains, nanofabrication and lithography, local functional control, and structural imaging in a variety of inorganic and organic materials, including piezoelectrics, semiconductors, polymers, biomolecules and biological systems.