"Reanimating Atoms, Molecules and A Few Things in Between"


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Monday, September 17, 2018 -
11:00am to 12:00pm
Brauer Hall, Room 12
Dr. Petro Maksymovych, Center for Nanophase Materials Sciences, Oak Ridge National Laboratory

Manipulation of single atoms and molecules is one of the most striking achievements of nanoscience.
In the present paradigm, the control over atomic positions is achieved by using highly localized stimulus
applied to relatively weakly interacting atoms or molecules. This is arguably the opposite regime of
biological molecules and living things, where controls over the shapes and motions are encoded into the
structures themselves.

I will present our nascent efforts in extending the control over atomic and molecular motion toward
the regime of stronger interactions. In particular, I will emphasize how finding reduced representations for
the motion a collection of molecules, for example by identifying or defining the order parameter, enables
understanding and predicting some of the counterintuitive patterns of sequential chemical reactions in
molecules supported on a metal surface. On the other hand, manipulation of the known order parameters,
for example in ferroelectric materials, gives rise to new properties that are difficult if not impossible to
achieve by synthetic methods. This so-called topological control over manipulation may advance atomic
manipulation toward synthetic methodology for realistic materials, higher energy scale of manipulation,
and consequently the stability of manipulated matter.

I will also touch upon the relevant developments in scanning probe microscopy techniques, likewise,
driven by the need to reduce or optimize the dimensionality of the data sets and data acquisition itself.
These methods can cope with overwhelmingly heterogeneous data-sets associated with complex materials
and dynamic effects and will eventually provide better control methods to guide local manipulation and
microscopy itself.

Dr. Maksymovych pursues development of governing principles in materials science and
new quantitative methods for nanotechnology. His research spans atomic and molecular
manipulation, phase transitions, active matter, ionic materials, and data science for
materials and control. His primary technical expertise is in Scanning Probe Microscopy,
Thin Films, Surface Chemistry and Data Analytics.

Faculty, students, and the general public are invited.





From: https://www.ornl.gov/staff-profile/petro-maksymovych



Design and characterizations of layered ferroelectric materials - a new iniative to recreate properties of complex oxides in van-der-Waals crystals and low-dimensional materials (with M. A. Susner (MSTD), M. Chyasnavichus (CNMS), M. A. McGuire (MSTD), P. Ganesh (CNMS), D. Abernathy (SNS), A. Borisevich (MSTD))

Molecular ionic solids - exploring correlated electron properties on a molecular lattice (with S. Jeon (CNMS), P. Ganesh (CNMS), B. Sumpter (CNMS), M. Yoon (CNMS), C. Park (CNMS))

Development of force and tunneling probe methodologies (non-contact atomic force microscopy (AFM), conductive AFM, tunneling microscopy and spectroscopy)

Coupling of ferroic and electronic properties - investigating properties of complex oxide ferroelectrics that emerge in large electric fields (created by field-focusing or dimensional confinement) - with S. V. Kalinin (CNMS), R. Vasudevan (CNMS), N. Balke (CNMS)

Hosted by: Erik Henriksen

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