Advanced Characterization

gold “islands” deposited on a layer of two-dimensional molybdenum sulfide, imaged using HAADF and iDPC STEM techniques
Gold “islands” deposited on a layer of two-dimensional molybdenum sulfide, imaged using HAADF and iDPC STEM techniques, showing the (apparent) 18A and 32A moire cells respectively

I have long been fascinated by materials characterization, and in-particular the ability to image atoms and nanoscale phenomena at high spatial resolution. In many scenarios, the best way to do that is using transmission electron microscopy (TEM).

In my PhD work, I have collaborated with experimentalists to directly image moirè superlattices at the interface of 2D/3D materials and investigate phonon localization at the interface between two 2D materials with high-resolution (S)TEM-based techniques.

Currently, as a postdoctoral Miller research fellow, I’m developing computational imaging techniques to image the induced magnetic fields arising in hydrodynamic electron flows with nanoscale resolution, using a recently-developed TEM-based technique called ‘Vector-field electron tomography’ and electron ptychography.