Focused-probe STEM Ptychography: Developments and Opportunities

Expanding STEM opportunities through inclusive STEM‐focused high schools

Inclusive STEM high schools (ISHSs) (where STEM is science, technology, engineering, and mathematics) admit students on the basis of interest rather than competitive examination. This study examines the central assumption behind these schools-that they provide students from subgroups underrepresented in STEM with experiences that equip them academically and attitudinally to enter and stay in th...

Strategies for high-throughput focused-beam ptychography

X-ray ptychography is being utilized for a wide range of imaging experiments with a resolution beyond the limit of the X-ray optics used. Introducing a parameter for the ptychographic resolution gain Gp (the ratio of the beam size over the achieved pixel size in the reconstructed image), strategies for data sampling and for increasing imaging throughput when the specimen is at the focus of an X...

Induced Pluripotent Stem Cells: Challenges and Opportunities

Regenerative capacity of mammals is limited and can rarely regenerate a specific organ or tissue fully. Due to these limitations, regenerative medicine seeks efficient and safe cell sources for regeneration of damaged tissues and organs or treatment for incurable diseases. Human embryonic stem cells (HESCs) hold two important properties called self renewal and pluripotency. However, the use of ...

Opportunities , challenges and regulatory developments

Single-shot ptychography & sparsity-based subwavelength ptychography

We overcome two major limitations in ptychography – a powerful scanning-based coherent diffraction imaging technique. We demonstrate single-shot ptychography, overcoming the scanning-limited temporal resolution and also demonstrate sparsity-based subwavelength ptychography, overcoming the Abbe spatial resolution limit. OSCI: Phase retrieval: 100.5070; Scanning microscopy: 180.5810; Computationa...