Mackey (Trey) Long, one of our two summer interns, won 1st place for his final presentation as part of the SURE program. Congratulations!
Collaborative work with the labs of Matthias Wuttig and Thomas Taubner at Aachen University was just published in ACS Photonics. The paper, titled “Quantification of carrier density gradients along axially-doped silicon nanowires using infrared nanoscopy,” demonstrates a route to measure dopant gradients in Si nanowires. The nanowires used in this study were synthesized by Dmitriy Boyuk and Amar Mohabir.
Maritza Mujica and Amar Mohabir proudly presented their latest work at the ACS Colloid and Surface Science Symposium, which was held June 16-19, 2019 at Georgia Tech.
Prof. Filler visited the Materials and Manufacturing Directorate at the Air Force Research Lab (AFRL) in Dayton, OH on May 17th, 2019. He visit with lab scientists and presented a talk titled “Transistor Inks for Additive and Scalable Electronics: A Story of Process Innovation.” Thanks to Chris Tabor for hosting his visit!
Prof. Filler visited with the students and faculty at Vanderbilt University on March 24, 2019 where he spoke about “Nanoscale Programming of Semiconductors.” Thanks to Prof. Piran Kidambi for hosting!
On April 7th, 2019, Prof. Filler visited the University of Colorado - Boulder to present a talk titled “The Functionality-Scale Nexus.” A very special thanks to Prof. Steve George for the opportunity to visit!
Prof. Filler made one final stop at ALD NanoSolutions on April 8th.
Eric Tervo and Michael Gustafson’s paper titled “Photonic thermal conduction by infrared plasmonic resonators in semiconductor nanowires” has been published in Applied Physics Letters. They model the thermal excitation and waveguiding of photons inside in dopant-engineered semiconductor nanowires, showing that photons promise to carry as much heat as phonons and electrons. Their results identify a new mode of heat transport inside solids, suggest experiments to definitively demonstrate this effect, and open the door to solid-state thermal switches.
A collaborative team from the Filler Lab at Georgia Tech and the Shan Lab at Rutgers University just published a paper titled “Contactless Electrical and Structural Characterization of Semiconductor Nanowires with Axially Modulated Doping Profiles” in the journal Small. The works demonstrates a route to determine the electrical conductivities of nanowires containing two differently doped regions in a high-throughput, non-contact manner. It sets the stage for characterizing complete electronic devices, which similarly consist of multiple types of domains.
Prof. Filler presented at the SEMI Flex conference in Monterey, CA and also visited HP Labs in Palo Alto, CA.
Sampath Kommandur and Thang Pham have joined the lab as postdocs to work on new types of nanowire growth. Sampath received his Ph.D. from Georgia Tech where he focused on advanced thermal metrology techniques. Thang received his Ph.D. from UC Berkeley where he specialized in the electron microscopy characterization of 1-D nanomaterials. Welcome!
Prof. Filler will be giving a Frontiers in Science public lecture on March 5, 2019 at 6:30pm in the Marcus Nanotechnology Building as part of Georgia Tech’s activities for the International Year of the Periodic Table. His lecture, titled Celebrating Silicon: Its Success, Hidden History, and Next Act, will take the audience on a journey through the manufacturing innovations that transformed silicon from its humble beginnings as the most abundant metal in Earth’s crust to the enabler of the computer chips that underpin the modern economy. More information is available here and here.
Recent work from the Filler Lab was on display at the 2018 Fall MRS Meeting. Amar Mohabir talked about his work on Si/Ge nanowire patterning, Maritza Mujica presented her work on the Geode process for large-scale nanowire production, and Gozde Tutuncuoglu discussed her studies of thermal transport in Si nanowires. Prof. Filler was a co-organizer of Symposium NM03: Nanowires and Related 1-D Nanostructures where this work was presented.
The team also left time for a little fun and to meet a few lab alumni! From left-to-right: Prof. Filler, Naechul Shin (Inha University), Gozde Tutuncuoglu, Maritza Mujica, Amar Mohabir, Saujan Sivaram (Naval Research Laboratory), Hyewon Shim (masters student in Naechul’s lab).
Maritza Mujica presented a talk titled “Advanced Emulsion-Templating of Microreactors for the Scalable Production of Semiconductor Nanowires” at the 2018 AIChE Annual Meeting. In this work, she developed a process to create bulk quantities of hollow microcapsules to use as reactors for semiconductor nanowire growth.
Amar Mohabir presented his work on the bottom-up patterning Si and Ge nanowires at the 65th AVS Symposium and Exhibition in Long Beach, CA. The title of his talk was “Selective Patterning of Silicon/Germanium Surfaces and Nanostructures via Surface Initiated Polymerization.” Trent Weiss and Gozde Tutuncuoglu were coauthors on the work.
Prof. Filler also present a talk titled “The Geode Process: A Route to the Large-Scale Manufacturing of Functionally-Encoded Semiconductor Nanostructures.” This work was completed by Maritza Mujica and is a collaborative effort with the Behrens and Breedveld labs at Georgia Tech. The Geode process uses hollow microcapsules as reactors for semiconductor nanowire growth, allowing nanowire production to be scaled by orders of magnitude.
Prof. Filler recently visited the Department of Chemistry at Tulane University where he gave a seminar titled “Programming Heterogeneity at the Nanoscale.” Thank you to Igor Rubtsov and his lab for their hospitality.
He also visited the Department of Chemical and Biological Engineering at the University of Alabama where is spoke about “Nanoscale Programming of Semiconductors.” Thanks to Qing Peng for hosting a great visit.
Dr. Filler presented two talks at the IEEE Research and Applications of Photonics in Defense (RAPID) Conference. The first was a keynote titled "Scalable Nanophotonics Manufacturing" and second was a focused research presentation titled "Scalable Production and Characterization of Semiconductor Nanowires for Applications in Photonics".
Congratulations to Weize Hu whose paper titled "Enhanced Photodesorption from Near- and Mid-Infrared Plasmonic Nanocrystal Thin Films" was just accepted for publication in the Journal of Vacuum Science and Technology A. It was also chosen as an Editor's Pick! In this work, Weize shows that low energy infrared light coupled to surface plasmons supported by a metal oxide nanocrystal thin film can accelerate the desorption of two model molecules.