Researchers from Tokyo Metropolitan University have developed a new dye that can strongly absorb second near-IR radiation and transform it to heat. Starting with a dye from the bile pigment family, they designed a unique ring structure which can bind rhodium and iridium. Researchers from Tokyo Metropolitan University have developed a new dye that can strongly absorb second near-IR radiation and transform it to heat. Starting with a dye from the bile pigment family, they designed a unique ring structure which can bind rhodium and iridium. Biochemistry Analytical Chemistry Phys.org – latest science and technology news stories