Contrast Enhancement of Nano-materials Using Phase Plate STEM

Contrast Enhancement of Long-Range Periodic Structures using Hole-Free Phase Plate

Phase contrast transmission electron microscopy is a powerful tool to enhance the image contrast of transparent materials such as ice-embedded biological specimens and polymer materials. In this method, a phase plate, which is placed at the back-focal plane of the objective lens, gives a phase shift for scattered electron waves, resulting in a significant enhancement contrast of specimens in im...

synthesis of amido alkylnaphthols using nano-magnetic particles and surfactants

we used dbsa and nano-magnetic for the synthesis of amido alkylnaphtols.

Nano-Encapsulated Smart Tunable Phase Change Materials

Z-contrast Stem for Materials Science

The use of a high-angle annular detector on a scanning transmission electron microscope (STEM) for imaging crystalline materials with strong chemical sensitivity is described. The image can be used to form an elemental map with high efficiency which can be quantified directly in terms of atomic concentrations. Examples of ion-implanted silicon recrystallized by solidor liquid-phase epitaxial gr...

Contrast Enhancement and Reversal of a Phase Spot Array using Nonlinear Optical Phase Filtering

An array of phase spots with poor intensity distribution has been contrast enhanced and reversed by nonlinear phase filtering techniques using Zinc Tetraphenyl Porphyrin as the variable phase filter in the 4-f imaging system, whose refractive index depends on the intensity of the incident beam. The intensity distributions of the unfiltered and filtered images were compared to explicitly show th...