Monocapillary X-ray optics are a promising technology for producing intense microbeams of X rays.’ When coupled with laboratory X-ray sources, these optics are an enabling technology for the implementation of X-ray-based micro-spectrometer with spatial resolutions ranging from 1 to 25 microns. These instruments use X-ray fluorescence to determine the composition and thickness of materials with ...

In this paper, an analytical model based on the modified couple stress theory and Timoshenko beam is developed to study vibrational power flow of a microbeam with crack. The open edge crack modeled as rotational spring, which connects two segments separated by location. governing equations cracked are derived from Hamilton's principle. By introducing differential operator method, transformed in...

We studied the insulator-metal transition (IMT) in single-domain, single crystalline vanadium dioxide (VO(2)) microbeams with infrared microspectroscopy. The unique nature of such samples allowed us to probe the intrinsic behavior of both insulating and metallic phases in the close vicinity of IMT, and investigate the IMT driven by either strain or temperature independently. We found that the V...

Using optical, TEM, and ultrafast electron diffraction experiments we find that single crystal VO(2) microbeams gently placed on insulating substrates or metal grids exhibit different behaviors, with structural and metal-insulator transitions occurring at the same temperature for insulating substrates, while for metal substrates a new monoclinic metal phase lies between the insulating monoclini...