These materials are pretty expensive. Tellurium is currently about $86/kg, tantalum $430/kg, and iridium $140,000/kg: https://www.dailymetalprice.com/metalpric

These materials are pretty expensive. Tellurium is currently about $86/kg, tantalum $430/kg, and iridium $140,000/kg: https://www.dailymetalprice.com/metalpricecharts.php?c=ir&u=kg&d=120 https://www.dailymetalprice.com/metalpricecharts.php?c=ir&u=... https://www.metal.com/en/markets/20 https://www.metal.com/en/markets/20 But it's a "2d material" so it only takes a tiny atomically thin quantity of these elements to build a detector: https://news.columbia.edu/news/what-are-2d-materials-and-why-do-they-interest-scientists https://news.columbia.edu/news/what-are-2d-materials-and-why...