Abstract: A utility cutter includes a cutter blade, a cutter handle, a blade frame, and a blade replacement arrangement. The blade frame includes a first and a second frame member pivotally mounted with each other to define a blade receiving cavity that the cutter blade is substantially retained at the blade receiving cavity, wherein the blade frame is pivotally mounted to the elongated cutter handle for folding between a folded position and an unfolded position. The blade replacement arrangement is operatively coupled with the first and the second frame member for normally locking the first and the second frame member with each other. When the blade frame is in the unfolded position, the blade replacement arrangement is adapted to unlock the first frame member, such that the cutter blade is capable of being conveniently and safely replaced at the blade receiving cavity without sliding movement of the cutter blade.

Abstract: Provided are aligned carbon nanotubes for a fuel cell having a large surface area, a nanocomposite that includes the aligned carbon nanotubes loaded with highly dispersed nanoparticles of a metallic catalyst, methods of producing the carbon nanotubes and the nanocomposite, and a fuel cell including the nanocomposite. In the nanocomposite, nanoparticles of the metallic catalyst are uniformly distributed on external walls of the nanotubes. A fuel cell including the nanocomposite exhibits better performance.

Abstract: Embodiments of nanostructures and nanocomposites and embodiments of methods for forming and modifying these nanostructures and nanocomposites are disclosed. The methods can include transporting a metal, metallic compound or precursor to a surface of a nanostructure substrate in a carrier while the carrier is in supercritical fluid form. Embodiments of the disclosed methods can be used to form catalytic structures, such as catalytic structures including nanostructure supports and catalytic metallic nanoparticles attached to the nanostructure supports. These catalytic structures are useful for catalyzing reactions in fuel cell applications, such as oxygen reduction and methanol oxidation reactions. Some of the disclosed nanostructures and nanocomposites include carbon nanotubes.

Abstract: A utility cutter includes a cutter blade, a cutter handle, a blade frame, and a blade replacement arrangement. The blade frame includes a first and a second frame member pivotally mounted with each other to define a blade receiving cavity that the cutter blade is substantially retained at the blade receiving cavity, wherein the blade frame is pivotally mounted to the elongated cutter handle for folding between a folded position and an unfolded position. The blade replacement arrangement is operatively coupled with the first and the second frame member for normally locking the first and the second frame member with each other. When the blade frame is in the unfolded position, the blade replacement arrangement is adapted to unlock the first frame member, such that the cutter blade is capable of being conveniently and safely replaced at the blade receiving cavity without sliding movement of the cutter blade.