Nanolog and nanoparticles and method of formation
A nanostructure is provided that in one embodiment includes a cluster of cylindrical bodies. Each of the cylindrical bodies in the cluster are substantially aligned with one another so that their lengths are substantially parallel. The composition of the cylindrical bodies include tungsten (W) and sulfur (S), and each of the cylindrical bodies has a geometry with at least one dimension that is in the nanoscale. Each cluster of cylindrical bodies may have a width dimension ranging from 0.2 microns to 5.0 microns, and a length greater than 5.0 microns. In some embodiments, the cylindrical bodies are composed of tungsten disulfide (WS2). In another embodiment the nanolog is a particle comprised of external concentric disulfide layers which encloses internal disulfide folds and regions of oxide. Proportions between disulfide and oxide can be tailored by thermal treatment and/or extent of initial synthesis reaction.
1. A nanostructure comprising:
a cluster of substantially cylindrical bodies, the substantially cylindrical bodies in said cluster are directly in contact with one another along their lengths and are substantially aligned with one another so that their lengths are substantially parallel, the composition of the cylindrical bodies comprising tungsten (W) and sulfur (S), and each of the cylindrical bodies has a geometry with at least one dimension that is in the nanoscale, wherein each cluster of cylindrical bodies has a width dimension ranging from 0.2 microns to 5.0 microns, and a length greater than 5.0 microns, wherein each of the cylindrical bodies include externally concentric crystalline regions comprised of said tungsten (W) and said sulfur (S) and crystalline core regions comprised of an oxide containing material, wherein folds of said tungsten (W) and said sulfur (S) are present between said externally concentric crystalline regions and said crystalline core regions comprised of said oxide containing material.
2. The nanostructure of claim 1 , wherein the cylindrical bodies are composed of tungsten disulfide (WS 2 ).
3. The nanostructure of claim 1 , wherein each cylindrical body has a hollow core across its entire length.
4. A nanostructure comprising:
a cluster of substantially cylindrical bodies, the substantially cylindrical bodies in said cluster are directly in contact with one another along their lengths and are substantially aligned with one another so that their lengths are substantially parallel, the composition of the cylindrical bodies comprising tungsten (W) and sulfur (S), and each of the cylindrical bodies has a geometry with at least one dimension that is in the nanoscale, wherein each cluster of cylindrical bodies has a width dimension ranging from 0.2 microns to 5.0 microns, and a length greater than 5.0 microns, wherein each fold of said crystalline folds is a nano-fold having at least two limbs connected at a hinge point at an angle.
5. A method of forming a catalyst comprising:
treating a precursor material of tungsten oxide powder with a hydrogen sulfide containing gas to provide reduction and sulfidization reactions with the precursor material to provide a sulfided reactant structure;
separating the sulfided reactant reaction into a powder containing clusters of cylindrical bodies composed of tungsten (W) and sulfur (S), wherein each of the cylindrical bodies in said powder containing clusters are directly in contact with one another along their lengths and are substantially aligned with one another so that their lengths are substantially parallel, wherein each of the cylindrical bodies has a geometry with at least one dimension that is in the nanoscale, and said each cluster of cylindrical bodies may have a width dimension ranging from 0.2 microns to 5.0 microns, and a length greater than 5.0 microns; and
forming a metal containing coating on the clusters of cylindrical bodies.