Endoscopic subsurface imaging in tissues

Demos, Stavros G.; Staggs, M.; Radousky, Harry B.

doi:10.1117/12.424526

Cited by 2 publications

(2 citation statements)

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“…This rapid growth induced defect formation phenomenon had been previously observed in other crystal system such as KDP. 32,33 The dark field TEM image recorded by the diffraction of (110) faces in Figure 6b indicated that the six side surfaces were different from the central part. The brightness of the side surfaces was much stronger and more uniform than the top/bottom surfaces, indicating the well-crystallized structure of the edge wall.…”

Section: Resultsmentioning

confidence: 99%

Structural Components and Anisotropic Dissolution Behaviors in One Hexagonal Single Crystal of β-Tricalcium Phosphate

Tao

Jiang

Zhai

et al. 2008

Crystal Growth & Design

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Large-scale β-tricalcium phosphate (β-TCP) hexagonal single crystals were synthesized at a relatively low temperature (150 °C) by using a solution-phase method. The solvent, ethylene glycol, played an important role during the formation of the homogeneous submicron-sized crystals. Unlike the conventional understanding of a single crystal, the wall of the formed β-TCP hexagonal was well crystallized, showing different physicochemical properties from the bulk part. The dissolution spots were anisotropically distributed throughout the single crystal. The bulk part dissolved readily from the top and bottom planes in the undersaturated solutions, but the thin hexagonal wall could be stable against any dissolution even in pure water. These differences between the wall and the bulk part were attributed to the different crystallinities and defect densities in their structures. It was suggested that the low defect number might stem from the solvent−interface exchange that was allowed the edge surfaces in contact with the solution. And the rapid growth of the particles resulted in the randomly distributed defects in the bulk part, which induced a selective dissolution along the c-axis of β-TCP. Furthermore, the stability of wall could be explained by a size effect during the nanodemineralization. It was interesting that both the wall and the bulk part shared the exact same lattice fringes under the transmission electron microscope. This phenomenon implied that both components were crystallographically identical so that they were constructed into an integral single crystal of β-TCP. The distinct dissolution behaviors of these two parts in one single crystal resulted in the formation of porous, gearlike, and ringlike single crystals at different demineralization stages, which demonstrated an easy control of crystal morphology patterns by using the anisotropic dissolution behavior.

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Section: Resultsmentioning

confidence: 99%

Structural Components and Anisotropic Dissolution Behaviors in One Hexagonal Single Crystal of β-Tricalcium Phosphate

Tao

Jiang

Zhai

et al. 2008

Crystal Growth & Design

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show abstract

“…In reality, most crystals contain complex cluster defects formed by a mixture of various intrinsic defects, 19 making it hard to evaluate the influence of each intrinsic defect on damage intuitively. 5,[20][21][22] Therefore, studying the effects of intrinsic defects on laser damage in crystals one by one, and then analyzing their comprehensive effects, is an effective way to study crystal damage and provide solid theoretical support for crystal damage research. Liu and Wang et al [23][24][25] investigated the reaction mechanism of point defects such as H and O using ab initio calculations based on density-functional theory (DFT) and analyzed the effect of the existence of point defects on the optical properties of crystals.…”

Section: Introductionmentioning

confidence: 99%