Accurate detection and classification of substances and materials is critical for today’s ever-growing needs related to both automation and increased safety. Optical sensing technologies are at the ...

If you are in need of a lesson on just how much things have changed in the last 60 years, an anecdote from my childhood might suffice. My grandfather was a junk man, augmenting the income from his ...

Scientists determine the smallest possible cubic lead sulfide cluster that exhibits the same coordination (a key structural property) as bigger bulk crystals. Lead sulfide (PbS) forms when an equal ...

Recent thermodynamic calculations by researchers at Washington University in St. Louis provide plausible evidence that "heavy metal snow," which blankets the surface of upper altitude Venusian ...

The Integrated Detector Assembly (IDA) lead selenide and lead sulfide high-sensitivity infrared detectors integrate their relevant electronics within a compact, hermetically sealed TO-8 package.