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This chapter discusses several approaches that can be used to change the compositions of diatom frustules or other bioclastic structures into a wide variety of non‐natural chemistries without loss of the bioassembled 3‐D morphology. These processes are referred to collectively as bioclastic and Shape‐preserving/norganic Conversion (BaSIC). By merging the attractive self‐assembly characteristics of...
The synthesis of three‐dimensional (3‐D) assemblies of zirconia nanocrystals via the shape‐preserving reactive conversion of biologically reproducible, silica‐based microtemplates (diatom microshells) is demonstrated for the first time. Silica diatom microshells were first converted into magnesia replicas via an oxidation‐reduction displacement reaction with magnesium gas. The magnesia replicas were...
We develop a model for silicon-on-insulator microresonators with magnesiothermically-formed porous silicon cladding possessing three-dimensional interconnected pores. Investigation of waveguide design and geometrical parameters indicates an optimized areal mass sensitivity of ∼ 0.2 pm/(pg/mm2).
In this paper, we present various novel techniques for the performance enhancement of nanotechnology-enabled wireless platforms utilizing inkjet-printed carbon-based thin films, especially for gas sensing applications. The key advancements include surface modification techniques to drastically reduce film thickness (from micron to nm) and a unique in-house developed nano-patterning process to increase...
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