Bulletin of the American Physical Society
APS March Meeting 2014
Volume 59, Number 1
Monday–Friday, March 3–7, 2014; Denver, Colorado
Session J38: Invited Session: Research and Opportunties at the DOE Nanoscaled Science and Research Centers |
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Sponsoring Units: COM Chair: Fernando Camino, Brookhaven National Laboratory Room: 709/711 |
Tuesday, March 4, 2014 2:30PM - 3:06PM |
J38.00001: Nanoscale Engineering of Structures and Devices on Surfaces Invited Speaker: Esmeralda Yitamben The relentless increase in both density and speed that has characterized microelectronics, and now nanoelectronics, will require a new paradigm to continue beyond current technologies. One proposed such paradigm shift demands the ultimate control over the number and position of dopants in a device, which includes quantum information processing and variety of semiconductor device materials and architectures aimed at solving end-of-Moore's law issues. Such a work requires the development of a tool for the design of atomically precise devices on silicon and other surfaces, in hope of studying the effect of local interactions between atomic-scale structures, their microscopic behavior, and how quantum mechanical effects might influence nano-device behavior in very small structures. Demonstrations of remarkable 2D nanostructures down to single atom devices are reported here thanks to the development of scanning tunneling microscopy (STM) as an imaging and patterning tool. These include the formation of molecular chiral superstructures on metallic surfaces, as well as the atomic-scale depassivation of a hydrogen terminated surface with an STM, toward the incorporation of dopants in silicon. I will spend some time at the end, talking about my experience working at a national laboratory.\\[4pt] Acknowledgments: This work was performed, in part, at the Center for Integrated Nanotechnologies, a U.S. DOE, Office of Basic Energy Sciences user facility. The work was supported by the Sandia National Laboratories LDRD Program. Sandia National Laboratories is a multi-program laboratory operated by Sandia Corporation, a Lockheed-Martin Company, for the U. S. Department of Energy under Contract No. DE-AC04-94AL85000. Use of the Center for Nanoscale Materials at Argonne National Laboratory was supported by the U.S. DOE, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. [Preview Abstract] |
Tuesday, March 4, 2014 3:06PM - 3:42PM |
J38.00002: Computing Correlated Electrons: Roadmap and Roadblocks Invited Speaker: Gonzalo Alvarez Starting with a reminder of the motivations and key concepts, I will present an overview of computational strongly correlated electron research, its challenges and its current applications and directions. I will explain methods to obtain information from the theory, given the roadblocks one encounters due to strong quantum correlation. The focus will be on the density matrix renormalization group, one of the preferred methods to extract information from the low dimensional theories. A roadmap to study time evolution, temperature dependence, and spectral functions will be discussed. These three topics are of interest for experiments at Oak Ridge National Laboratory's CNMS nanocenter and elsewhere. The talk will conclude with a summary of our efforts to program and make available free and open source codes to compute correlated electrons in models for functional materials. [Preview Abstract] |
Tuesday, March 4, 2014 3:42PM - 4:18PM |
J38.00003: The Role of Nanoscience and Nanotechnology in Addressing the World's Energy Challenges Invited Speaker: James Dickerson The Center for Functional Nanomaterials (CFN) at Brookhaven National Laboratory in the United States provides state-of-the-art capabilities for the fabrication and study of nanoscale materials, with an emphasis on atomic-level tailoring to achieve desired properties and functions. The CFN is a science-based user facility, simultaneously developing strong scientific programs while offering broad access to its capabilities and collaboration through an active user program. The overarching scientific theme of the CFN is the development and understanding of nanoscale materials that address the Nations' challenges in energy security, consistent with the Department of Energy mission. The CFN is one of five Nanoscale Science Research Centers (\underline {NSRCs}) funded by the Office of Science of the United States Department of Energy. The CFN supports Brookhaven's goal of leadership in the development of advanced materials and processes for selected energy applications. In my presentation, I will highlight the role that the CFN, through its scientific staff and this scientific user community, is playing in addressing the world's energy challenges. I will focus on several trajectories of research that are being executed at CFN, including work on photovoltaics, novel nanostructured materials for catalysis, soft and biological materials, and our state-of-the-art electron microscopy and proximal probe microscopy facilities. [Preview Abstract] |
Tuesday, March 4, 2014 4:18PM - 4:54PM |
J38.00004: Nanoscience and nanofabrication at Argonne National Laboratory: The art of making small Invited Speaker: Leonidas E. Ocola Over a decade ago the Department of Energy started the design, and construction of five Nanoscale Science Research Centers at different national laboratories with the objective to provide research opportunities in Nanoscience for the scientific community worldwide. The Center for Nanoscale Materials (CNM) at Argonne National Laboratory was constructed in 2006, and opened its doors to the user community in 2007. Currently the CNM hosts over 400 user proposals a year. There are six research groups at the CNM that do work in nanophotonics, electronic and magnetic materials and devices, nanobio interfaces, nanofabrication and devices, x-ray nanoscale microscopy and theory and modeling. I work in the Nanofabrication and Devices group and my research career has covered the use of x-rays, electrons and ions in the pursuit of making the smaller and smaller structures and devices. At the CNM I have been able to push the limits of electron beam lithography, and expand the use of ion beams to large area nanofabrication. Some of our accomplishments include determining liquid-polymer interactions as a function of temperature, redefining proximity effect correction at the nanoscale (NanoPEC), measuring to less than 0.5{\%} error the backscatter range for 100 KV electron beams and finding that the range is a function of the density of the substrate, fabrication of plasmonic slit waveguides, and using ions to create complex three dimensional structures for use in fluidics. None of these accomplishments are possible without detailed understanding of the physics and chemistry mechanisms involved during fabrication. This requires extensive theory and simulation work to validate our experimental results. The fruit of our work then is a full understanding of ``why'' we use certain processes for nanofabrication and not just a simple set of process recipes. A summary of all these activities will be discussed at the presentation. [Preview Abstract] |
Tuesday, March 4, 2014 4:54PM - 5:30PM |
J38.00005: Plasmonic Smart Windows: A New Invention from Berkeley's Molecular Foundry Invited Speaker: Guillermo Garcia In the United States, roughly 20{\%} of the annual energy consumption comes from lighting and thermal management within buildings. By adjusting to the surrounding environment, dynamic ``smart'' window coatings minimize the need for heating and artificial lighting through solar gain optimization. Current dynamic windows can only operate through a visible tint, which reduces natural light during thermal management. This talk will focus on discussing a near infrared plasmonic electrochromic coating developed at Berkeley's Molecular Foundry that dynamically modulate solar heat without affecting visible light. Use of this new class of dynamic coating can improve energy consumption by minimizing artificial lighting during solar gain optimization. [Preview Abstract] |
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