Silica-polymer hybrid structures that mimic natural occurring diatoms are created by combining direct-write assembly of polyamine-rich scaffolds with biomimetic silicification. The influence of ink composition, solution pH, and immersion protocol on the silica content is investigated. The reaction kinetics is studied by measuring the silica content as a function of the silicification time, which suggests that the biomimetic silicification of polyamine-rich scaffolds is a diffusion-limited process. The distribution of silica is found to be uniform throughout within the 3D scaffolds. These silicified hybrid structures exhibit improved thermal and mechanical stability by maintaining their structural integrity even upon complete removal of the polymer phase by heating to 1000AdC.1 Thesis Objectives 2 1 .2 Thesis Organization 2 1.3 References 3 CHAPTER 2 PHASE BEHAVIOR AND RHEOLOGICAL BEHAVIOR OF PAH- PAA COMPLEXES FOR DIRECT INK WRITING 6 2. 1 Introduction 6 2.2 Experimental Methods 10anbsp;...
|Title||:||Direct-write Assembly of Three-dimensional Polyelectrolyte Scaffolds, Inorganic Hybrids, and Photonic Crystals|
|Publisher||:||ProQuest - 2007|