Materials Literature
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In this paper we study both experimentally and theoretically the dynamics of an ultrasound-driven vapor bubble of perfluoropentane (PFP) inside a droplet of the same liquid, immersed in a water medium superheated with respect to the PFP boiling point. We determine the temporal evolution of the bubble radius with ultra…
A growing body of research indicates that the stoichiometry of compound semiconductor quantum dots (QDs) may offer control over the materials' optoelectronic properties in ways that could be invaluable in electronic devices. Quantum dots have been characterized as having a stoichiometric bulk-like core with a highly r…
// Brenda Auffinger 1 , Ramin Morshed 1 , Alex Tobias 1 , Yu Cheng 1 , Atique U Ahmed 1 , Maciej S Lesniak 1 1 The Brain Tumor Center, The University of Chicago, Chicago, Illinois, USA Correspondence: Maciej S Lesniak, email: // Keywords : Nanoparticle, drug delivery systems, stem cell carriers, malignant glioma, brai…
We present an ab initio theoretical analysis of the temperature-dependent stability of inherently nanolaminated (Cr${}_{1\ensuremath{-}x}$Mn${}_{x}$)${}_{2}$AlC. The results indicate energetic stability over the composition range $x$ $=$ 0.0 to 0.5 for temperatures \ensuremath{\ge}600 K. Corresponding thin film compou…
We use self-consistent field theory (SCFT) to study the self-assembly of cylinder-forming diblock copolymers confined in a cylindrical prepattern. This situation arises in contact holes -the hole shrink problem- where the goal is to produce a cylindrical hole with reduced dimensions relative to a guiding prepattern. I…
Directed self-assembly lithography (DSAL), which combines self-assembling materials and a lithographically defined prepattern, is a potential candidate to extend optical lithography beyond 22 nm. To take full advantage of DSAL requires diminishing not only systematic error modes but also random error modes by carefull…
The goal of this paper is to investigate the potential of Directed Self-Assembly (DSA) to address contact via level patterning, by either Critical Dimension (CD) shrink or contact multiplication. Using the 300mm pilot line available in LETI and Arkema materials, our approach is based on the graphoepitaxy of PS-b- PMMA…
Surfactant-free CuInS2 (CIS) nanocrystals (NCs) were synthesized by replacing organic capping ligands with inorganic ions S(2-). The efficacy of ligand exchange was probed by thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-vis sp…
The structure and density of the bound interfacial surfactant layer and associated hydration shell were investigated using analytical ultracentrifugation for length and chirality purified (6,5) single-wall carbon nanotubes (SWCNTs) in three different bile salt surfactant solutions. The differences in the chemical stru…
Organic acids were explored as a means to expand the library of cyclic carbonate monomers capable of undergoing controlled ring-opening polymerization. Various nitrogenous bases have proven incredibly adept at polymerizing cyclic carbonates; however, their use has largely precluded monomers with an acidic proton. Mole…
An understanding of the dispersion of nanoparticles into polymer melts is needed in order to control material properties of polymer nanocomposites. Here we study the dispersion of polymer-grafted nanorods in homopolymer melts of the same chemistry, using both experiment and theory. The theoretical calculations are per…
ABSTRACT Direct arylation polymerization (DArP) is an emerging alternative to Stille and Suzuki polymerizations. This method is attractive as it allows preparation of high‐molecular‐weight conjugated polymers in good yield without the need to metallate monomers. Despite this promise, for poly(3‐hexylthiophene) (P3HT)…
Using a chirped pulse probe technique, we have obtained single-shot measurements of temporal evolution of ac conductivity at 1.55 eV (800 nm) during electron energy relaxation in nonequilibrium warm dense gold with energy densities up to $4.1\text{ }\text{ }\mathrm{MJ}/\mathrm{kg}$ ($8\ifmmode\times\else\texttimes\fi{…
Semiconducting carbon nanotubes (CNTs) are direct bandgap materials with outstanding electronic and optoelectronic properties and have been investigated for various electronic and optoelectronic device applications, such as light-emitting diodes, photodetectors and photovoltaic cells. Here, a brief review of the vario…
Nanoparticles functionalized with mixed self-assembled monolayers (m-SAMs) comprising positively and negatively charged thiols are stable at both low and high pH but precipitate sharply at the pH where the charges on the particle are balanced (pH(prec)). By adjusting the proportion of the positively and negatively cha…
Nanofibers were generated by melt blowing three sets of polymer blends, each comprised of pairs of immiscible components. Blends containing minority phases (25% by volume) of poly(ethylene- co -chlorotrifluoroethylene) (PECTFE) in poly(butylene terephthalate) (PBT), PECTFE in poly(styrene) (PS), and PBT in PS were dis…
We examine the influence of the main approximations employed in density-functional theory descriptions of the solid phase of molecular hydrogen near dissociation. We consider the importance of nuclear quantum effects on equilibrium properties and find that they strongly influence intramolecular properties, such as bon…
Giant tunability of ferroelectric polarization ($\ensuremath{\Delta}P=5000\text{ }\text{ }\ensuremath{\mu}\mathrm{C}/{\mathrm{m}}^{2}$) in the multiferroic ${\mathrm{GdMn}}_{2}{\mathrm{O}}_{5}$ with external magnetic fields is discovered. The detailed magnetic model from x-ray magnetic scattering results indicates tha…
A new benzoxazole-modified [PhSiO 1.5 ] 8 (OPS) benzoxazine (OPS–Bz) was synthesized and used to prepare polyhedral oligomeric silsesquioxane (POSS)/ polybenzoxazine (PBz) nanocomposites. Fourier transform infrared spectroscopy (FTIR), 1 H NMR, 29 Si NMR, differential scanning calorimetry (DSC) and thermogravimetric a…
Inspired by the water-enhanced mechanical gradient character of the squid beak, we herein report a nanocomposite that mimics both the architecture and properties of this interesting natural material. Similar to the squid beak, we have developed nanocomposites where the degree of cross-linking is controlled along the l…