The 100 sheets were distributed randomly among the nation’s Post Offices and at the Postal Service’s Stamp Fulfillment Center which accepts stamp orders online atusps.com/stamps, and by calling 800-STAMP24 (800-782-6724). Additionally, some of the 100 also were randomly distributed atebay.c...
As an extra advantage, the electron wavelength is a few orders of magnitude smaller than that of typical X-rays or neutrons, increasing the radius of the Ewald sphere (which is equal to the wave vector) and making its curvature almost flat, thus making ED patterns (almost) two-dimensional ...
Sha et al. investigated the impact of the sub-layer dispersion on the photovoltaic performance of small-molecule organic solar cells. Since the hole mobility of CuPc:C60 is about four orders of magnitude smaller compared to the electron mobility, the optimal charge transport path was obtained ...