We investigated the quantitative description of nanoporous silicon morphology and its correlation with electrical and optical properties. We performed first-order as well as second-order statistical analysis of AFM images of nanoporous silicon fabricated by two different methods: reaction-induced-vapor-phase-stain-etch and electrochemical. We also simulated AFM images by generation of various m...

Nanoporous gold and silver exhibit strong, omnidirectional broad-band absorption in the far-field. Even though they consist entirely of gold or silver atoms, these materials appear black and dull, in great contrast with the familiar luster of continuous gold and silver. The nature of these anomalous optical characteristics is revealed here by combining nanoscale electron energy loss spectroscop...

Metallic foams with pore sizes from 250 lm to 2 mm have been a subject of research for over two decades due to their high surface area, which allows for a variety of applications, such as thermal and sound insulation. Recently, processing of metallic foams at the nanoscale (pores sizes less than 100 nm) has opened the door to new and interesting applications, such as sensors and actuators. In g...

We describe the preparation of nanoporous carbon nanofibers (CNFs) decorated with platinum nanoparticles (PtNPs) in this work by electrospining polyacrylonitrile (PAN) nanofibers and subsequent carbonization and binding of PtNPs. The fabricated nanoporous CNF-PtNP hybrids were further utilized to modify glass carbon electrodes and used for the non-enzymatic amperometric biosensor for the highly...

The electrical conductivity of dense and nanoporous zirconia-based thin fi lms is compared to results obtained on bulk yttria stabilized zirconia (YSZ) ceramics. Different thin fi lm preparation methods are used in order to vary grain size, grain shape, and porosity of the thin fi lms. In porous fi lms, a rather high conductivity is found at room temperature which decreases with increasing temp...

Nanochemistry fabrication methods have improved remarkably over the last few years. Among the different strategies developed to elaborate nanomaterials, the templating method is one of the most attractive as it has proven to be reliable for the synthesis of arrays of nanowires and nanotubules of desired composition, sizes and aspect ratios. Chemical and electrochemical techniques are used for s...

The crush behaviors of steel tubes filled with nanoporous-materials-functionalized liquids are experimentally investigated under quasi-static and dynamic conditions. Results show that the nanoporous-materials-functionalized liquid can enhance the load-carrying and the energy absorption capacities of thin-walled tubes, as the buckling mode is affected. The effective buckling stress increases wit...

A facile means for obtaining submicrometer carbon fibers with a nanoporous structure is presented. A mixture of polyacrylonitrile (PAN) and a copolymer of acrylonitrile and methyl methacrylate (poly(AN-co-MMA)) in dimethylformamide was electrospun into submicrometer fibers with a microphase-separated structure. During the followed oxidation process, the copolymer domains were pyrolyzed, resulti...

Extracellular nucleic acids freely circulating in blood and other physiologic fluids are important biomarkers for non-invasive diagnostics and early detection of cancer and other diseases, yet difficult to detect because they exist in very low concentrations and large volumes. Here we demonstrate a new broad-range sensor platform for ultrasensitive and selective detection of circulating DNA dow...