Design and fabrication of nanostructured thin films and applications in optics and interfacial phenomena

Liu, Shizhao
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Plawsky, Joel L., 1957-
Raukas, Madis
Lu, T.-M. (Toh-Ming), 1943-
Lee, Sangwoo
Shi, Sufei
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Chemical engineering
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In the second part, we designed a lossless, zero-index photonic crystal structure to enable the emission-pattern control near 920 nm, and we proved the feasibility of fabricating the designed structure with OAD method by successfully making its prototype. In the third part, a composite film made of a stable, gold nanoparticle array with well-controlled separation and size on the top a nanocolumnar TiO2 OAD film was fabricated. The fabrication of the nanoparticle array is based on governing the solid-state dewetting of as-deposited gold aggregates on the TiO2 nanorods with Rayleigh-instability. We found that the topology of TiO2 nanorod tips can induce contact line pinning and increase the contact angle along the vapor flux direction to the supported gold aggregates, and dewetting dynamics will therefore act differently on TiO2 nanorod tips than on a featureless, planar TiO2. Contact line pinning and contact angle increase can inhibit the coalescence between dewetting geometries and facilitate the instability growth on the supported materials, which makes nanocolumnar OAD films as desired templated substrates to govern Rayleigh-instability and produce monodisperse NPs.
May 2018
School of Engineering
Dept. of Chemical and Biological Engineering
Rensselaer Polytechnic Institute, Troy, NY
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