Oak Ridge National Laboratory
High-performance, low-cost, single-crystal-like device layers and controlled self-assembly of nanostuctures within device layers for wide-ranging energy and electronic applications
Location: EB1 Room 1011
Friday, February 7th 2014 - 11:00 am
For many energy and electronic applications, single-crystal-like materials offer the best performance. However, in almost all cases, the single-crystal form of the relevant material is too expensive. In addition, for many applications, very long or wide materials are required, a regime not accessible by conventional single-crystal growth. This necessitates the use of flexible, large-area, long, single-crystal-like substrates for heteroepitaxial growth of the relevant advanced material for the electronic or energy application in question. Since the factor determining suitability for applications is price/performance, the process used for fabrication of the artificial substrate needs to be very scalable and low-cost. Details of such large-area, single-crystal substrate fabrication and the range of materials that can be epitaxially grown on such substrates will be discussed. Heteroepitaxial buffer layers of various materials (of rock salt, flourite, perovskite and pyrochlore crystal structures) can be deposited in a roll-to-roll configuration using web-coating employing electron-beam evaporation, sputtering or chemical solution deposition. In addition, for many applications, controlled incorporation of a 3D network of nanodots or nanorods within a ceramic matrix is desired for optimization of physical properties or for enabling novel properties or phenomena. It will be shown that controlled incorporation of 3D self-assembled nanodots and/or nanorods of a multicomponent material can be achieved within another multicomponent device layer using a simultaneous phase separation and strain ordering process. As an example of a material for energy and electronic applications, detailed results will be presented for growth of high-temperature superconductors on such substrates. For both of these platform technologies (single-crystal-like substrates and 3D self-assembly of nanomaterials), wide ranging applications exist in electronic and energy sectors including applications in photovoltaics, ferroelectrics, multiferroics, and ultra-high density storage. The talk will give examples for each of these applications using these platform technologies.
Dr. Amit Goyal is a Corporate Fellow and a Distinguished Scientist at the Oak Ridge National Laboratory. He is also a Battelle Distinguished Inventor. He has co-authored over 350 publications and has 79 issued patents. A recent analysis of citations and papers published worldwide in the field of high-temperature superconductivity, between 1999 and 2009, conducted by Thompson-Reuters's Essential Science Indicators, ranked him as the most cited author worldwide. He has received numerous national & international awards of excellence including the prestigious presidential level, 2012 DOE's E. O. Lawrence Award in the inaugural category of "Energy Science & Innovation" and the 2010 R&D Magazine's "Innovator of the Year" Award, eight R&D100 Awards (R&D100 awards are regarded as the "oscars" of innovation), three Federal Laboratory Consortia (FLC) Awards, MIT's TR-100 Innovator Award, the University of Rochester's Distinguished Scholar Medal and the Indian Institute of Technology, Kharagpur's Distinguished Alumnus Award. He is a Fellow of eight professional societies including the Materials Research Society (MRS), American Association for Advancement of Science (AAAS), The American Physical Society (APS), the World Innovation Foundation (WIF), the American Society of Metals (ASM), the Institute of Physics (IOP), the American Ceramic Society (ACERS) and the World Technology Network (WTN).