Surface-modified, exfoliated nanoplatelets as mesomorphic structures in solutions and polymeric matrices

A method of manufacturing a nanocomposite having a continuous organic phase and oligomer-modified nanoplatelet mesomorphic structures, wherein the oligomer has a molecular weight of at least 100 g/mol.U

Surface-modified, exfoliated nanoplatelets as mesomorphic structures in solutions and polymeric matrices

A method of manufacturing a nanocomposite having a continuous organic phase and oligomer-modified nanoplatelet mesomorphic structures, wherein the oligomer has a molecular weight of at least 100 g/mol.U

Surface-modified, exfoliated nanoplatelets as mesomorphic structures in solutions and polymeric matrices

A method of manufacturing a nanocomposite having a continuous organic phase and oligomer-modified nanoplatelet mesomorphic structures, wherein the oligomer has a molecular weight of at least 100 g/mol.U

On Optimal Worst-Case Matching

Bichromatic reverse nearest neighbor (BRNN) queries have been studied extensively in the literature of spatial databases. Given a set P of service-providers and a set O of customers, a BRNN query is to find which customers in O are "interested" in a given service-provider in P. Recently, it has been found that this kind of queries lacks the consideration of the capacities of service-providers and the demands of customers. In order to address this issue, some spatial matching problems have been proposed, which, however, cannot be used for some real-life applications like emergency facility allocation where the maximum matching cost (or distance) should be minimized. In this paper, we propose a new problem called SPatial Matching for Minimizing Maximum matching distance (SPM-MM). Then, we design two algorithms for SPM-MM, Threshold-Adapt and Swap-Chain. Threshold-Adapt is simple and easy to understand but not scalable to large datasets due to its relatively high time/space complexity. Swap-Chain, which follows a fundamentally different idea from Threshold-Adapt, runs faster than Threshold-Adapt by orders of magnitude and uses significantly less memory. We conducted extensive empirical studies which verified the efficiency and scalability of Swap-Chain. Copyright © 2013 ACM

Hop Doubling Label Indexing for Point-to-Point Distance Querying on Scale-Free Networks

We study the problem of point-to-point distance querying for massive scale-free graphs, which is important for numerous applications. Given a directed or undirected graph, we propose to build an index for answering such queries based on a novel hop-doubling labeling technique. We derive bounds on the index size, the computation costs and I/O costs based on the properties of unweighted scale-free graphs. We show that our method is much more efficient and effective compared to the state-of-the-art techniques, in terms of both querying time and indexing costs. Our empirical study shows that our method can handle graphs that are orders of magnitude larger than existing methods. 1

Solution Processable Iridescent Self-Assembled Nanoplatelets with Finely Tunable Interlayer Distances Using Charge- and Sterically Stabilizing Oligomeric Polyoxyalkyleneamine Surfactants

Photonic structures that are processable in organic solvents are critical to large-scale fabrication of device components. To provide a viable alternative to traditional lithographic methods, solution processable photonic structures are required to demonstrate fine control over critical device dimensions in the fabrication process. Photonic structures typically require long-range electrostatic forces that are effective only in aqueous solutions. Here we report a novel strategy of using oligomeric polyoxyalkyleneamine surfactants to prepare charge- and sterically stabilized nanoplatelets that can self-assemble into lamellar phases in nonaqueous solutions with finely tunable large interlamellar distances that can exceed 100 nm. Brilliant iridescence in the visible spectrum with tunable colors is demonstrated. The nanoplatelets are shown to circumvent the typical phase transition behavior from isotropic to nematic to columnar phase and transitioned into smectic phase at concentrations of ϕ < 0.01