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Proceedings Paper

Electrostatic layer-by-layer nano-assembly: films, cantilevers, micropatterns, and nanocapsules
Author(s): Dinesh Kommireddy; Jingshi Shi; Xiaodong Yan; Haifeng Ji; Yuri M. Lvov
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Paper Abstract

Layer-by-layer (LbL) nanoassembly in combination with traditional lithography and microfluidics was applied for the fabrication of ultrathin microcantilevers and for the modification of microchannel surface. Hundreds of cantilevers were fabricated on a silicon wafer simultaneously. The purpose is to develop chemical/biosensor arrays for parallel, massive data gathering. Microcantilever optical deflections were measured using a four-quadrant AFM head with integrated laser and position sensitive detector. In the second part, laminar flow fabrication of interpolyelectrolyte complexes was studied inside a microchannel. Polyelectrolyte micropatterns were studied using fluorescent confocal microscopy. Filament like, 15 μm, interpolyelectrolyte microstripes were formed at flow rate higher than 0.01 mL•min-1 and concentrations of the initial polyelectrolytes below 1 mg•mL-1. New, soft micropatterning technique for the anisotropic modification of polyelectrolyte nanocapsules was also demonstrated. The microchannel surface was made sensitive to pH by coating the surface of the channel with a pH sensitive dye using LbL assembly to control the reaction.

Paper Details

Date Published: 19 January 2005
PDF: 12 pages
Proc. SPIE 5592, Nanofabrication: Technologies, Devices, and Applications, (19 January 2005); doi: 10.1117/12.568046
Show Author Affiliations
Dinesh Kommireddy, Louisiana Tech Univ. (United States)
Jingshi Shi, Louisiana Tech Univ. (United States)
Xiaodong Yan, Louisiana Tech Univ. (United States)
Haifeng Ji, Louisiana Tech Univ. (United States)
Yuri M. Lvov, Louisiana Tech Univ. (United States)


Published in SPIE Proceedings Vol. 5592:
Nanofabrication: Technologies, Devices, and Applications
Warren Y-C. Lai; Stanley Pau; O. Daniel Lopez, Editor(s)

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