An Accessible Approach to Preparing Water-Soluble Mn2+-Doped (CdSSe)ZnS (Core)Shell Nanocrystals for Ratiometric Temperature Sensing

• Published in: ACS nano Vol. 5; no. 12; pp. 9511 - 9522
• Main Authors: Hsia, Chih-Hao, Wuttig, Anna, Yang, Haw
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 27.12.2011; American Chemical Society (ACS)
• Subjects: air stable; Equipment Design; Equipment Failure Analysis; green chemistry; nanocrystals; NANOSCIENCE AND NANOTECHNOLOGY; Nanostructures - chemistry; Nanostructures - ultrastructure; Nanotechnology - instrumentation; nanothermometer; nonradiative transitions; Particle Size; quantum dot; Quantum Dots; Solubility; Temperature; temperature-dependent lifetime; Thermography - instrumentation; Thermometers; Water - chemistry; nanothermometer; quantum dot; air stable; temperature-dependent lifetime; green chemistry
• ISSN: 1936-0851; 1936-086X
• DOI: 10.1021/nn2025622

A new synthetic scheme allowing structural modifications to temperature-sensitive and water-soluble d -penicillamine-passivated Mn2+-doped (CdSSe)ZnS (core)shell nanocrystals (MnQDs) was reported using air-stable chemicals. The temperature-dependent optical properties of the nanocrystals were tuned by changing their structure and compositionthe ZnS shell thickness and the Mn2+-dopant concentration. Thick ZnS shells significantly reduce the interference of nonradiative transitions on ratiometric emission intensities. High-dopant concentration affords consistent temperature sensitivity. In addition to the new base structure for quantum dot ratiometric temperature sensing via flexible, glovebox-free routes, the results also underscore the generalizability of the emission intensity ratio scheme for temperature sensing, originally proposed for rare-earth-doped materials.