RE: Merck pitch in with QS Ltd6 Oct 2022 15:34
I am not a scientist, but Quantum Science's lead reference may have to do with the fact that Nanoco's Infra-red QDs may contain tin, while their products do not.
Per Nanoco Patent description,
"Indium tin oxide thin films with both near-infrared transparency and excellent resistivity
Patent number: 10167545
Abstract: An indium tin oxide film containing by weight about 90% In2O3 and about 10% SnO2 is prepared using a low-energy deposition sputter process on a substrate. The indium tin oxide film thus obtained has a carrier concentration on the order of 1020/cm3 and a carrier mobility greater than 30 cm2/Vs. The low carrier concentration results in an increased transmission in the near infra-red region, while the high carrier mobility results in good conductive properties.
Type: Grant
Filed: April 20, 2017 "
"Does tin have lead?
Tin is the 49th most abundant element in Earth's crust, representing 2 ppm compared with 75 ppm for zinc, 50 ppm for copper, and 14 ppm for lead."
I welcome clarification.