Browsing Waterloo Research by Author "Balazs, Anna C."
Now showing items 1-12 of 12
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Binary hard sphere mixtures in block copolymer melts
Thompson, Russell B.; Lee, Jae Youn; Jasnow, David; Balazs, Anna C. (American Physical Society, 2002)We perform a self-consistent-field/density-functional-theory hybrid analysis for a system of diblock copoly- mers mixed with polydisperse, hard, spherical particles of various chemical species. We apply this theory to study ... -
Block Copolymer-Directed Assembly of Nanoparticles: Forming Mesoscopically Ordered Hybrid Materials
Thompson, Russell B.; Ginzburg, Valeriy V.; Matsen, Mark W.; Balazs, Anna C. (American Chemical Society, 2002)Mixtures of diblock copolymers and nanoscopic spherical particles can yield well-ordered hybrid materials, which can be used for separation processes, catalysis, and optoelectronic applications. Predicting the morphologies ... -
Convective flow reversal in self-powered enzyme micropumps
Ortiz-Rivera, Isamar; Shum, Henry; Agrawal, Arjun; Sen, Ayusman; Balazs, Anna C. (Proceedings of the National Academy of Sciences, 2016-02-22)Surface-bound enzymes can act as pumps that drive large-scale fluid flows in the presence of their substrates or promoters. Thus, enzymatic catalysis can be harnessed for "on demand" pumping in nano-and microfluidic devices ... -
Effect of Nanoscopic Particles on the Mesophase Structure of Diblock Copolymers
Lee, Jae Youn; Thompson, Russell B.; Jasnow, David; Balazs, Anna C. (American Chemical Society, 2002)Introduction. The fabrication of novel biomimetic photonic and electronic materials requires the manipulation of both organic and inorganic materials at the nanometer length scale. One possible means of achieving this level ... -
Entropically Driven Formation of Hierarchically Ordered Nanocomposites
Lee, Jae Youn; Thompson, Russell B.; Jasnow, David; Balazs, Anna C. (American Physical Society, 2002)Using theoretical models, we undertake the first investigation into the rich behavior that emerges when binary particle mixtures are blended with microphase-separating copolymers. We isolate an example of coupled self-assembly ... -
Harnessing catalytic pumps for directional delivery of microparticles in microchambers
Das, Sambeeta; Shklyaev, Oleg E.; Altemose, Alicia; Shum, Henry; Ortiz-Rivera, Isamar; Valdez, Lyanne; Mallouk, Thomas E.; Balazs, Anna C.; Sen, Ayusman (Springer Nature, 2017-02-17)The directed transport of microparticles in microfluidic devices is vital for efficient bioassays and fabrication of complex microstructures. There remains, however, a need for methods to propel and steer microscopic cargo ... -
Harnessing surface-bound enzymatic reactions to organize microcapsules in solution
Shklyaev, Oleg E.; Shum, Henry; Sen, Ayusman; Balazs, Anna C. (American Association for the Advancement of Science (AAAS), 2016-03)By developing new computational models, we examine how enzymatic reactions on an underlying surface can be harnessed to direct the motion and organization of reagent-laden microcapsules in a fluid-filled microchannel. In ... -
Predicting the Mesophases of Copolymer-Nanoparticle Composites
Thompson, Russell B.; Ginzburg, Valeriy V.; Matsen, Mark W.; Balazs, Anna C. (American Association for the Advancement of Science, 2001)The interactions between mesophase-forming copolymers and nanoscopic par- ticles can lead to highly organized hybrid materials. The morphology of such composites depends not only on the characteristics of the copolymers, ... -
Self-assembly of a binary mixture of particles and diblock copolymers
Lee, Jae Youn; Thompson, Russell B.; Jasnow, David; Balazs, Anna C. (Royal Society of Chemistry, 2003)Using theoretical models, we undertake the first investigation into the synergy and rich phase behavior that emerges when binary particle mixtures are blended with microphase- separating copolymers. We isolate an example ... -
Self-Assembly of Amphiphilic Nanoparticle-Coil “Tadpole” Macromolecules
Lee, Jae Youn; Balazs, Anna C.; Thompson, Russell B.; Hill, Randall M. (American Chemical Society, 2004)None. -
Self-Assembly of Amphiphilic Nanoparticle-Coil “Tadpole” Macromolecules
Lee, Jae Youn; Balazs, Anna C.; Thompson, Russell B.; Hill, Randall M. (American Chemical Society, 2004)There has been considerable fascination with the self-assembling behavior of amphiphilic chainlike molecules that range from short-chain surfactants to high molecular weight block copolymers. The self-assembly of simple ... -
Synthetic quorum sensing in model microcapsule colonies
Shum, Henry; Balazs, Anna C. (Proceedings of the National Academy of Sciences, 2017-07-24)Biological quorum sensing refers to the ability of cells to gauge their population density and collectively initiate a new behavior once a critical density is reached. Designing synthetic materials systems that exhibit ...