2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

Partnering Events:

TechConnect Summit
Clean Technology 2008

Self-Assembly of Nanoporous Silica Colloids: from Fundamentals to Applications

I. Sokolov
Clarkson University, US

Keywords:
nanostructures, self-assembly, nanomanufacturing, lab-on-a-particle

Abstract:
One of the serious problems of modern nanotechnology is not only engineering of nanoscale materials and particles, but also assembling and integrating them into larger-scale structures, devices, and systems. Nanopores silica colloid particles are well defined nanostructured systems which are self assembled from nanoscale units into larger hierarchal structures, shapes which are typically observed in biological worlds. I will discuss the fundamental mechanisms that drive such morphogenesis of these nanoporous particles. From structural point of view, these particles are sorts of very dense arrays of nanoscale cylindrical channels running in parallel inside silica matrix. The diameter of these channels can be chosen from 2 to ~20nm. Various molecules can be confined inside such nanochannels, For example, fluorescent organic dyes can be physically (non-covalently) encapsulated inside self-sealed nanochannels in micron size particles (scaling down to 30 nm particles will also be demonstrated). Nanoscale confinement of the dye molecules allows us to attain rather non-trivial properties of the confined dyes. I will demonstrate ultra-bright fluorescent silica particles, which are 260 times brighter that similar size brightest possible colloidal agglomeration of quantum dots. Combining different molecules, one could build a microscopic device/particle with complex response to external stimuli.


Nanotech 2008 Conference Program Abstract