Category Chemistry/Nanotechnology

Overall structure of human PrimPol ternary complex with template-primer DNA and incoming dATP. The N-helix and modules ModN and ModC are shown in cartoon representation in dark blue, yellow, and cyan, respectively. The DNA is shown as gray sticks, and the Ca2+ ion is shown as a light blue sphere. The templating base T and the incoming dATP are shown in red. Yellow and cyan dashed lines depict unstructured regions in the ModN and ModC, respectively. The side chains of key catalytic active-site residues Asp114, Glu116, and Asp280 are highlighted in red. Secondary structure elements (α helices and β strands) are labeled in black.

Gas bubbles form as researchers use a unique catalyst to convert water to hydrogen and oxygen. The inset image shows the catalytic materials at the nanoscale. Credit: Washington State University

Compact sensor providing room-temperature operation of monolithic surface-active lasers and detectors integrated on the same chip. The differentiation between emitter and detector is eliminated, which enables mutual commutation. Proof-of-principle gas measurements with a limit of detection below 400 ppm are demonstrated. This concept enables a crucial miniaturization of sensing devices.

Electron microscopy showing one of the unique geometries observed in the nano-silicon power derived from diatomaceous earth. Credit: Image courtesy of University of California – Riverside