MSE Research Spotlight: Combinatorial Synthesis:
A New Method of Discovery
Combinatorial synthesis is a newly emerging paradigm of research methodology which aims to drastically increase the efficiency at which new materials are discovered and improved. Using this technique, up to thousands of compositionally varying samples are synthesized, processed, and screened in a single experiment in order to rapidly survey large materials phase spaces. Associate Professort Ichiro Takeuchi and his research group are actively involved in the combinatorial approach to materials and its applications to a variety of materials systems. The materials systems of particular interest include magnetic materials and smart materials.
New materials tend to have increasingly complicated structures, often consisting of a large number of elements. The combinatorial techniques can be used to address materials issues at different levels in a wide variety of topics ranging from semiconductor manufacturing and thin film smart materials to catalytic powders and biomaterials. It is widely anticipated that combinatorial approach to materials will lead to accelerated innovation in various industries broadly benefiting our society.
The application of the combinatorial approach to technologically relevant electronic materials is best implemented in the form of thin film libraries. Combinatorial thin film libraries encompassing large compositional variations can be generated using different thin film deposition techniques. Takeuchi and his group have developed several deposition chambers at the University of Maryland. They also work on a number of collaborative projects with NIST on combinatorial investigations of functional materials using a 12-pocket dual electron beam combinatorial deposition system.
Recent developments include the establishment of the W. M. Keck Laboratory for Nanosynthesis and Multiscale Characterization located in the new Jeong H. Kim Engineering Building (Co-P.I.s: Professors Ichiro Takeuchi [MSE], Gary Rubloff [MSE] and Ellen Williams [Physics]). In this Lab, combinatorial laser molecular beam epitaxy is used to generate libraries of functional oxide materials through atomic layer-by-layer controlled deposition. In situ electron diffraction is used to monitor the unit cell by unit cell construction of perovskite materials.
Takeuchi's combinatorial research effort has previously been a significant component of the NSF funded International Materials Institute on Combinatorial Sciences and Materials Informatics Collaboratory. It also plays a key role in exploring new multiferroic materials, which are being pursued under NSF MRSEC.
For more information, see:
R. Potyrailo, K. Rajan, K. Stoewe, I. Takeuchi, B. Chisholm, H. Lam, "Combinatorial and High-Throughput Screening of Materials Libraries: Review of State of the Art," ACS Combinatorial Science 13, 579 (2011). Most read article of 2011 in ACS Combinatorial Science. (PDF)