Abstract: Sequential infiltration synthesis, a vapor-phase material hybridization method derived from atomic layer deposition (ALD), provides unique ways to generate functional organic-inorganic hybrids and inorganic nanostructures directly converted from organic templates, such as self-assembled block copolymers (BCPs) and lithographically patterned polymeric structures. Practical technological applications of the method require both an improved understanding of the process mechanism and identification of new functional properties that can be enabled by the method.

In this talk, I will highlight a few examples of new materials structures and functionalities we have developed, including patternable hybrid nanocomposite with ultrahigh capacity to store elastic strain energy, metal oxide nanowire arrays for highly sensitive optical detectors, and three-dimensional inorganic nanomesh structures derived from hierarchically self-assembled BCP templates. I will also briefly discuss the influences of chemical characteristics of organic templates and infiltration protocol on the fidelity of infiltration synthesis.

Bio: Chang-Yong Nam is a scientist at the Center for Functional Nanomateraials Functional Nanomaterials at Brookhaven National Laboratory. He is also an adjunct professor of materials science and chemical engineering at Stony Brook University. He received his Ph.D. in materials science and engineering from the University of Pennsylvania. His current research addresses two areas: (a) development and application of ALD techniques toward the materials innovation in nanopatterning, hybrid nanocomposite, nanoelectronics, and catalysis; and (b) materials processing and device physics in organic semiconductors and low-dimensional materials including nanowires and two-dimensional materials.