A new type of shape-memory polymer (SMP) is developed by integrating scientific principles drawn from two disparate fields: the fast-growing photonic crystal and SMP technologies. This enables room-temperature operation for entire cycle instantaneous shape recovery triggered exposure to a variety organic vapors. As service our authors readers, this journal provides supporting information supplied authors. Such materials are peer reviewed may be re-organized online delivery, but not...

Photonic crystals and plasmonics are two key techniques that could ultimately enable all-optical integrated circuits quantum information processing. Unfortunately, the development implementation of these have been greatly impeded by expensive painstaking top-down nanofabrication (e.g., electron-beam lithography). By contrast, bottom-up colloidal self-assembly subsequent templating provide a much simpler, faster, inexpensive alternative to nanolithography in creating highly ordered photonic...

Worldwide, efforts are underway to produce hydrogen from water electrolysis, moving beyond the traditional reforming of fossil fuels. Renewable energy-powered production is possible, but use grid power also being considered for large-scale production. Additionally, some demonstration projects aim utilize electrolysis systems as auxiliary service resources enhance stability in grid, given rising share renewable energy. This study proposes a method connecting facilities based on voltage...

The effect of cathode structures on the chemical stability Nafion membranes is investigated. Membrane electrode assemblies (MEAs) were prepared by using 212 membrane and commercially available carbon supported Pt electro-catalysts. controlled use long side chain (LSC) short (SSC) perfluorosulfonic acids (PFSAs) as well three dispersing solvents for fabrication (a water-isopropanol mixture, N-methyl-2-pyrrolidone, or glycerol). durability was evaluated H2 crossover current density after a...

Here we report a simple and scalable soft-lithography-based templating technology for fabricating Au-covered oxide (titania zirconia) gratings by using DVDs as structural template. The resulting plasmonic simultaneously exhibit very high surface plasmon resonance (SPR) sensitivity (up to ∼940 nm per refractive index unit, RIU) figure of merit (FOM, up 62.5). effects thermal annealing the templated on their final properties have been systematically investigated both experiments...

Core–shell structured Au–PtPd/C and Au–Pt/C nanoparticles (NPs) were prepared using a successive reduction process on carbon supported Au with PtPd Pt particles.

Polymer electrolyte membrane (PEM) electrolyzer or alkaline is required to produce green hydrogen using renewable energy such as wind and/or solar power. PEM and differ in many ways, instantly basic materials, system configuration, operation characteristics are different. Building an optimal water hydrolysis by closely grasping the of each type great help building a safe ecosystem well efficiency production. In this study, kW class we developed, electrolysis described. Finally, brief...

Electrocatalysts for hydrogen oxidation reactions (HORs) are the key to renewable-energy technologies including fuel cells, pumps, and water splitting. Despite significant technological interest tremendous efforts that have been made, development of electrode catalysts with high activity at low cost remains a great challenge. Here, we report preparation, characterization, electrochemical properties hybrid material composed Pd nanocrystals grown on spontaneously oxidized WC as...

The electrochromic properties of thin films with a (lithium phosphorous oxynitride) protective layer and an device composed prepared by radio-frequency magnetron sputtering were investigated. film the devices (glass/ITO/) not only showed improved durability continuous potential cycling, but also demonstrated faster bleaching-coloring response rates higher coloration efficiency. Our results that layers are electrochemically stable, enhance Li ion-conducting electrolytes, can be used as for devices.

Here we report a scalable colloidal templating approach for fabricating periodic arrays of metallic and silicon nanorings with complex nanostructures. Non-close-packed monolayer silica crystal prepared by simple spin-coating technology is first used as template making mushroom-like composite nanostructures consisting spherical caps polymer stems. Subsequent metal sputtering reactive ion etching lead to the formation ordered asymmetric nickel which can be further utilized masks patterning...

Here we report a simple and scalable colloidal lithography technology for fabricating periodic arrays of gold nanodonuts sensitive surface plasmon resonance (SPR) analysis. This new bottom-up approach leverages unique polymer wetting layer between self-assembled, non-close-packed monolayer silica crystal silicon substrate to template ordered with tunable geometries over wafer-sized areas. The processes involved in this templating nanofabrication approach, including spin coating, oxygen...

The Pt/C catalysts modified with and have been prepared designated structures such as for the cathode of a direct methanol fuel cell (DMFC). X-ray diffraction cyclic voltammetry analyses indicate that in higher weight percent Pt/C, some active sites Pt are covered by amorphous ceria samaria particles. These oxide-modified exhibit tolerant behavior, this behavior increases increasing samaria. - -modified particularly latter used DMFC, dramatically improve performance than does when air is...

We have studied temperature uniformity during the post-exposure bake process across a 40 mm diameter of an x-ray mask membrane. Membrane was determined by measuring line size as function position A two-dimensional finite element model (FEM) used to analyze results and optimize design new chuck. The 3σ variation reduced 27 nm. FEM also examine issues associated with resist baking on ARPA-NIST X-ray Mask Standard initial are discussed.