In situ electrical conductivity and x-ray tomography experiments were conducted on a conductive polymer composite containing polyvinylidene fluoride (PVDF) copolymer, copper (Cu), and tin (Sn) during thermal annealing. This study provides detailed insight into the morphological origins of the beneficial effect of thermal annealing on the electrical properties of conductive composites containing low melting metal fillers. ... Read more »
Hybrid LED Phosphors Combine Performance and Durability
Light-emitting diodes (LEDs) last a long time and are very energy efficient. However, white LEDs currently rely on phosphor materials doped with rare-earth elements (REEs) that are increasingly costly and in short supply. A new class of hybrid phosphor materials shows promise as REE-free alternatives. ... Read more »
Director’s Note: Roger Falcone Stepping Down as ALS Director
“After more than 10 years as ALS Director, I will be stepping down later this year to return to teaching and research on campus. Berkeley Lab will soon begin the process of searching for a new ALS Director, and my plan is to be here until new leadership is identified.” ... Read more »
Jinghua Guo, Senior Scientist
Jinghua Guo has been a part of the ALS since the early days. His original research focus is still one of his top interests now—studies of in situ capabilities of catalysts in gases and liquids and chemical processes. Guo also studies nanostructured materials, energy materials, and water and environmental sciences at Beamline 8.0.1 and also at 6.3.1.2. ... Read more »