Ashish Jayaraman
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View article: Near-Infrared-Triggered Reversible Transformations of Gold Nanorod-Laden Lipid Assemblies: Implications for Cellular Delivery
Near-Infrared-Triggered Reversible Transformations of Gold Nanorod-Laden Lipid Assemblies: Implications for Cellular Delivery Open
Robust drug and gene delivery systems require innovative methods to control payload release and tune delivery efficiency. The most promising delivery materials are lipid-based and their efficiency often hinges on structural transformations…
View article: Dodecagonal quasicrystals of oil-swollen ionic surfactant micelles
Dodecagonal quasicrystals of oil-swollen ionic surfactant micelles Open
Significance Quasicrystals, which exhibit local rotational symmetries and infinite unit cells, are intermediate states of matter between glasses and periodic three-dimensional (3D) crystals. Despite their ubiquity in metal alloys, self-ass…
View article: Reevaluation of Poly(ethylene-<i>alt</i>-propylene)-<i>block</i>-Polydimethylsiloxane Phase Behavior Uncovers Topological Close-Packing and Epitaxial Quasicrystal Growth
Reevaluation of Poly(ethylene-<i>alt</i>-propylene)-<i>block</i>-Polydimethylsiloxane Phase Behavior Uncovers Topological Close-Packing and Epitaxial Quasicrystal Growth Open
Reanalysis of an asymmetric poly(ethylene-alt-propylene)-block-polydimethylsiloxane (PEP-PDMS) diblock copolymer first investigated in 1999 has revealed a rich phase behavior including a dodecagonal quasicrystal (DDQC), a Frank-Kasper σ ph…
View article: Thermodynamics of Micellar Lyotropic Liquid Crystals
Thermodynamics of Micellar Lyotropic Liquid Crystals Open
University of Minnesota Ph.D. dissertation. June 2020. Major: Chemical Engineering. Advisor: Mahesh Mahanthappa. 1 computer file (PDF); xxxii, 265 pages.
View article: Consequences of Convex Nanopore Chemistry on Confined Water Dynamics
Consequences of Convex Nanopore Chemistry on Confined Water Dynamics Open
A fundamental understanding of confined water is crucial for developing selective ion transport and water purification membranes, yet the roles of nanopore geometry and functionality on confined water dynamics remain unresolved. We report …
View article: Path-Dependent Preparation of Complex Micelle Packings of a Hydrated Diblock Oligomer
Path-Dependent Preparation of Complex Micelle Packings of a Hydrated Diblock Oligomer Open
Small-angle X-ray scattering analyses reveal that the hydrated diblock oligomer n-C16H23(OCH2CH2)20-OH (C16E20 or Brij 58) forms lyotropic liquid crystals (LLCs) exhibiting face-centered cubic (FCC), body-centered cubic (BCC), Frank-Kasper…
View article: Counterion-Dependent Access to Low-Symmetry Lyotropic Sphere Packings of Ionic Surfactant Micelles
Counterion-Dependent Access to Low-Symmetry Lyotropic Sphere Packings of Ionic Surfactant Micelles Open
The water-driven self-assembly of homologous dianionic surfactants into lyotropic liquid crystals (LLCs) is investigated, with a focus on understanding how surfactant headgroup and counterion identities guide supramolecular spherical mesop…