Jeremy Steinbacher - Controlled Synthesis of Silica Capsules: Taming the Reactivity of SiCl4 Using Flow and Chemistry

Document created by Jeremy Steinbacher on Aug 22, 2014
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  Publication Details (including relevant citation   information):

  Miller, L., Steinbacher, Jeremy, Houjeiry, Tania, Longstreet,   Ashley, Woodberry, Kendra, Gupton, B., Chen, Banghao, Clark, Ron,   McQuade, D., 2012, 2 (3), pp 92-102


  Monodisperse silica microcapsules are typically fabricated using   hard templating methods. Though soft templating methods are   known, none yet provides a fast and easy method to produce   monodisperse capsules. Herein, we describe a mesofluidic strategy   whereby monodisperse droplets of reactive silica precursors are   formed using a snap-off mechanism via a T junction. Both the   mesofluidic system and the composition of the reactive silica   formulation are critical features. Using solid- and   solution-state 29 Si nuclear magnetic resonance, scanning   electron microscopy, and optical microscopy, we have developed   models for why some formulations form exploding capsules, why   some capsules contain crystalline materials, and why some   capsules have thin or thick walls.

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