Category: Health Services

Ag2S Quantum Dots - CD Bioparticles CD Bioparticles provides NIR-II-emitting Ag2S quantum dots (QDs). It is well known that light from visible to NIR wavelengths (650–1350 nm) is noninvasive for detecting and imaging of abnormal tissue. The NIR optical window consist of the first near-infrared region (NIR-I; 650-000 nm) and the second near-infrared region (NIR-II; 1000-1700 nm). The NIR-II can be more conducive to imaging than NIR-I due to lower fluorescence and reduced light scattering. NIR-II QDs mainly include Ag2S, Ag2Se, Ag2Te, PbS, PbSe, InAs, Cd3P2, Cd3As2, CdTe, HgTe. However, the toxic elements such as cadmium, mercury, lead, and arsenic, have seriously affected their application in the biomedical field. In contrast, Ag2S QDs is a low toxicity or even nontoxic ideal NIR QDs material, which have been developed more rapidly and have been widely used in both organisms and cell imaging owing to their perfect optical properties and good biocompatibility. Ag2S QDs have been extensively developed for novel nano-medical applications ranging from fluorescence imaging, to biosensing and potent PTT, due to their good near-infrared (NIR) absorbance, enhanced resistance to photobleaching, effective photoconversion efficiency, ultrasmall size, and high stability in aqueous solution. Ag2S QDs are ideal NIR fluorescent QDs for in vivo applications due to their low cytotoxicity (e.g., absence of toxic Cd2+ and Pb2+ ions).