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Abstract Nanotechnology translates physics into function; it transforms the promising discoveries of nanoscience into advances in nanoengineering. For example colloidal quantum dots (QDs) due to their unique optical properties, such as strong size dependent emission wavelength, has enabled quantum dotsbased light emitting devices which can be designed to cover the entire nearinfrared spectrum based on a single material and fabrication process. Our interest in infrared light-emitting quantum dots came from their applications which span a broad range of human activities, and especially their prospective applications in telecommunications. Optical fiber has traditionally exhibited low-loss transmission windows in the vicinity of 1.3 m and 1.55 m. Other applications for which infrared active quantum dots have been proposed to date include: infrared luminescence light emitting devices, infrared detectors, modulators in the extended telecommunications-wavelength band (1.2–1.7 m), photovoltaic, infrared laser technologies, thermoelectrics devices, and biomedical applications. |