This exciting new paper in ACS Nano is a collaboration between the research groups of Profs. Will Dichtel, who synthesized the graphene nanoribbons from the “bottom up,” and Lynn Loo, who made the devices and the Clancy group. Our contribution involved showing the strongly deleterious effect of misaligned nanoribbons on the band gap of the system and the fact that the side-chains play little or no role in the electronic properties, except by keeping the GNRs apart.
Gao, F. Uribe-Romo, J.D. Saathoff, H. Arslan, C. R. Crick, S. J. Hein, B. Itin, P. Clancy, W.R. Dichtel and Y.-L. Loo, Accumulation mode electron transport in transistors of solution-synthesized and structurally precise graphene nanoribbons, ACS Nano, DOI: 10.1021/acsnano.6b00643 (2016).
Ace’s paper in Langmuir used a variety of complementary multiscale methods: molecular-scale coarse-grained Molecular Dynamics, mesoscale Kinetic Monte Carlo, and a novel continuum method to uncover the strengths and limitations of these methods to study heteroepitactical growth (i.e, growth of A on B where A and B have different preferred crystal structures). The 3D growth and the unexpected tendency for lower temperature growth to produce smoother films was also seen in experiments by Breuer and Witte.
Y. M. Acevedo, R.A. Cantrell, P. G. Berard, D. L. Koch and P. Clancy, Multiscale Simulation and Theoretical Description of Multilayer Heteroepitactic Growth of C60 on Pentacene, Langmuir, 32(12), 3045-3056 (2016)
The Clancy group was well represented this year in the highly competitive NSF Graduate Research Fellowship competition.
All of our candidates received an Honorable Mention: Graduate students Henry Herbol, Ryan Heden and Blaire Sorenson, and undergraduate researcher James Raiford. An NSF GRF Honorable Mention is a meaningful distinction among the over 17,000 STEM applicants. It carries with it an allocation on NSF’s supercomputer XSEDE facilities, which is sure to be well used by them all.
Congratulations Blaire, Henry, Ryan and Jimmy!
Jovana Andrejevic (left) and James Raiford at their TechCon poster session in Fall 2015
Applied and Engineering Physics senior undergraduate, Jovana Andrejevic, has been awarded a prestigious NSF Graduate Research Fellowship. Jovana has been working in the Clancy group in CBE for the past two years, creating a new approach to modeling chemically reactive species for quantum dot nucleation and growth, mentored by Clancy PhD student, James Stevenson. Jovana’s work resulted in a first-author publication in J. Chem. Theor. & Computation in 2016. She is active at Cornell as a physics tutor, as an outreach coordinator for SWE, and manages part of Cornell’s Community Center program. She is the winner of several Cornell awards, including the Rhodes Scholarship and a Cornell Engineering Alumni Association award. The NSF graduate fellowship is awarded to just ~2,000 outstanding students out of ~17,000 applicants across all STEM fields. Jovana will be attending graduate school in Fall 2016.
Clancy group’s second-year PhD student, Mardochee Reveil, and his work was featured on Cornell’s research page; see feature page. He describes his computational studies on III-V materials that could be faster than traditional silicon devices and with better heat transport characteristics. These new materials could keep us on the Moore’s law fast-track.
(Cornell University Photography)
Mardochee Reveil from Paulette Clancy’s research group at Cornell won the Best Poster award at the 2015 annual meeting of Cornell’s Nanofabrication Facility. His poster, “Characterizing the Behavior of Van der Pauw Devices under non-Ideal Conditions,” featured his innovative computational work to understand how the performance of van der Pauw devices is affected by changes in the size and shape of the contact as the contact dimensions are decreased. These devices are a commonly used way to determine thin film sheet resistances. Reveil has a Masters degree from Syracuse University and is currently a PhD candidate in the School of Chemical and Biomolecular Engineering at Cornell. He works closely with our experimental partner group, led by Prof. Michael O. Thompson (Mat. Sci.& Engr.), focusing on understanding dopant activation and diffusion in InGaAs.
James Stevenson (Cornell, Chemical Engineering PhD candidate) presented a talk at the Keck Institute for Space Sciences (KISS) at CalTech this summer based on work published in 2015 with his advisor, Paulette Clancy, and astronomer Jonathan Lunine in Science Advances. His work discussed the potential to form liposome-like analogs (azotosomes) in the methane-rich seas on Saturn’s moon, Titan. Based on his talk, he was invited to participate in the plenary session the following day for the Jet Propulsion Laboratory audience. These interactive KISS workshops “develop revolutionary concepts and technology for future space missions… as a ‘think and do tank.’ “
Cornell graduate students, Nikita Sengar and Blaire Sorenson, members of the Clancy group in Chemical Engineering, have been selected to receive two of the twelve travel grants available to attend the Macromolecular Simulation Software workshop in Jülich, Germany in October. The workshop is funded by NSF’s Advanced Cyberinfrastructure and Chemistry division and will be led by Professors Cecilia Clementi (Rice) and Shantenu Jha (Rutgers). The goal of the workshop is to “promote interaction between end users and software developers” in the increasingly decentralized software environment needed to attack challenges in molecular simulation. Sengar is investigating how organic semiconductors might be used to select specific sizes of carbon nanotubes, a joint project with Princeton University (Loo group). Sorenson is focusing on nucleation processes in perovskite materials for photovoltaics.
Congratulations to group PhD graduate, Dr. Alexandra Raymunt, and her husband Jon on the birth of little Clara Marie on July 14th (Bastille Day) at a delicate weight of 6 lbs 11 oz. Clever Alex, managing a new job, new city and new baby in her first year in Portland. Best wishes to you all.
Clancy group member, Victoria Sorg, passed her examination for Admission to Candidacy to the PhD (8/11/15) with flying colors. Tori gave a masterful introduction of the use and advantages of laser spike annealing InGaAs samples. The highlight of her talk was a dramatic (20%) improvement in carrier concentration as a result of their LSA treatment. This work has been presented to SRC member companies via an “e-Workshop” and in our annual SRC review. Tori is the first author on a recently accepted invited ECS paper describing this work. She is expected to graduate in 2017.