Figure 2
From: Strategies for Controlled Placement of Nanoscale Building Blocks
(A B) SEM images that illustrate the procedure used to assemble two different types of spherical colloids (2.8-μm PS beads, 1.6-μm silica balls) into dimeric units. The cylindrical holes were patterned in a thin film of photoresist. (C) TEM image of one of the dimers after released from their original support by dissolving the photoresist pattern in ethanol, followed by redeposition onto a TEM grid. (D) The fluorescence microscopy image of a 2D array of dimers that were self-assembled from PS beads that were different in both size and color: 3.0-μm beads doped with a green dye (FITC) and 1.7-μm beads doped with a red dye (Rhodamin). (Reprinted with permission from Reference [21]. Copyright 2001 American Chemical Society.)