Free radical sensor based on CdSe quantum dots with added 4-amino-2,2,6,6-tetramethylpiperidine oxide functionality

Article Abstract:

The association and resulting fluorescence quenching of CdSe quantum dots (QDs) by 4-amino-2,2,6,6-tetramethylpiperidine oxide (4-amino-TEMPO), a persistent nitroxide, are examined by using electron paramagnetic resonance (EPR) and fluorescence spectroscopy. Quantum dot-4-amino-TEMPO complexes can be used as free radical sensors, since the fluorescence (quenched by the nitroxide) is readily restored when radicals are trapped to form alkoxyamines.

Selenium Compounds, Usage, Electric properties, Quantum theory, Quantum mechanics, Electron paramagnetic resonance

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Temperature-sensitive photoluminescence of CdSe quantum dot clusters

Article Abstract:

The formation of narrow size dispersed and nanometer size aggregates of cadmium selenide (CdSe) quantum dots (QDs) and their temperature-sensitive photoluminescence (PL) spectral properties close to room temperature (298 K) are discussed. Reversible luminescence intensity variations and spectral shifts of QD clusters are found to show the potential for developing sensors based on QD nanoscale assemblies.

Organizational history, Company restructuring/company reorganization, Reorganization and restructuring, Optical properties, Quantum chemistry, Photoluminescence, Company organization

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