A review/perspective paper authored by Profs. Filler, Behrens, and Breedveld, as well as Ph.D. student Maritza Mujica, titled "Process Principles for Large-Scale Nanomanufacturing" has been published online in the Annual Review of Chemical and Biomolecular Engineering. This paper outlines the process needs for translating recent advances in nanoscience to economically viable manufacturing environments.
Ho Yee's paper “Low-Temperature Growth of Axial Si/Ge Nanowire Heterostructures Enabled by Trisilane” has been accepted for publication by Chemistry of Materials. He used a new precursor chemistry to create nanowires containing axial Si/Ge heterostructures, which are useful building blocks for large-area electronic circuits and thermoelectrics.
Amar Mohabir is a recipient of the 2016 Shell Outstanding ChBE TA Award. He received this departmental award based on not only high teaching ratings from his students, but also extensive personalized feedback detailing how he had a positive impact on his students' learning. Congratulations!
Prof. Filler recently gave invited talks at the James Franck Institute at the University of Chicago and at the Department of Chemical and Biomedical Engineering at the University of South Florida. In both cases, the title of his talk was "The Vapor-Liquid-Solid Mechanism: Encoding Heterogeneity at the Nanoscale" and featured the work of current student Dmitry Boyuk and former students Saujan Sivaram and Li-Wei Chou.
Chengquan Wang recently joined the group as a postdoctoral scholar. He hails from Jiangsu University in Zhenjiang, China and will be studying the synthesis and properties of plasmonic nanoparticles. Welcome to the team!
Prof. Filler gave an invited talk at the Chemical Reactions at Surfaces Gordon Research Conference (GRC) in Lucca, Italy. He spoke about the lab's work on nanowire surface chemistry and its ability to choreograph growth.
We are excited to welcome Gözde Tütüncüoglu to the group as a postdoc. She received her Ph.D. from EPFL working with Anna Fontcuberta i Morral on the MBE growth of nanostructures. At Georgia Tech, Gözde will be working to understand and control thermal transport in semiconductor nanostructures. She is a joint member of the Filler and Maldovan groups.
Prof. Filler gave an invited talk in Symposium NM1 : Semiconducting Nanowires, Nanoribbons and Heterostructures—Synthesis, Characterizations and Functional Devices at the 2016 MRS Fall Meeting in Boston, MA. His talk, titled "Designing Next Generation Semiconductor Nanowire Growth Processes," showcased work from former students Naechul Shin and Saujan Sivaram as well as current student Ho Yee Hui.
Congrats to Maddy Baker and Sterling Smith for being named Air Products Undergraduate Research Scholars for the 2016/2017 school year. This award supports their respective research projects on nanowire growth and infrared nanophotonics. Thanks to Air Products for their support of our undergrads!
Weize Hu presented a talk titled "Influence of Surface Reaction on the Infrared Localized Surface Plasmon Resonance of Indium Tin Oxide Nanocrystals" at the 63rd AVS Symposium and Exhibition in Nashville, TN and the 2016 AIChE Annual Meeting in San Francisco, CA. Great work! Prof. Filler also presented on behalf of Dmitriy Boyuk, Ho Yee, and Saujan Sivaram at both meetings.
Saujan Sivaram's recently published paper “Surface Hydrogen Enables Subeutectic Vapor–Liquid–Solid Semiconductor Nanowire Growth” has been highlighted on the cover of the November 2016 issue of Nano Letters. Martin Ek created this stunning image.
The illustration shows the crucial role of surface chemistry in subeutectic vapor-liquid-solid nanowire synthesis. The nanowire (dark gray) in the background of the cover has hydrogen atoms (white balls) adsorbed on its sidewalls, allowing the AuGe catalyst (in gold) to remain in a supercooled liquid state. The loss of this surface passivation opens a pathway for catalyst atoms (gold balls) to access the nanowire sidewall, as shown by the nanowire in the foreground, which ultimately results in catalyst solidification.
Prof. Filler had the pleasure to guest appear on episode 323 of Lost in the Stacks: the Original Research Library Rock 'n Roll Radio Show. The title of the episode is "Question My Authority II: Peer Review." We discuss the pros and cons of peer review, going as far as to ask if peer review is still needed. A great show!
Prof. Filler recently gave invited talks at the Pacific Rim Meeting on Electrochemical and Solid-State Science (PRiME) in Honolulu, HI and at the 68th Southeastern Regional Meeting
of the American Chemical Society (SERMACS) in Columbia, SC. Thank you to the organizers for their invitations.
Prof. Filler visited Princeton University to give the student-selected seminar in the Department of Chemical and Biological Engineering.
A new collaboration with Jerry Shan and Leonard Feldman at Rutgers University has been funded by the National Science Foundation. The project seeks to understand and control statistical variations in the conductivity of semiconductor nanowires. Thanks NSF!
Elizabeth Tom, a summer student in the Filler lab, won the best presentation award at the SURE year-end research symposium. Congratulations. Enjoy that iPad!
Saujan Sivaram, a recent graduate of the Filler Lab, has been awarded a National Research Council (NRC) Postdoctoral Fellowship. He will be working at the Naval Research Lab (NRL) in Washington, D.C. Congrats!
Congratulations to Dr. Saujan Sivaram, the lead author on a manuscript titled "Surface Hydrogen Enables Sub-Eutectic Vapor-Liquid-Solid Semiconductor Nanowire Growth" that was recently accepted to the journal Nano Letters. Along with collaborators Ho Yee Hui, Dr. Maria de la Mata, and Prof. Jordi Arbiol, he showed that nanowire growth while the catalyst droplet is in a sub-cooled liquid state, a widely observed behavior, results from the presence of surface adsorbates that decorate the nanowire sidewall. These species act as a diffusion barrier, preventing the droplet from finding a low-barrier nucleation site. More generally, the ability of surface adsorbates to arbitrate the diffusion of species to/from the catalyst droplet opens new opportunities to choreograph nanowire growth, structure, and function.