Ferrer-Torres, Edmy J.

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    Synthesis of CdS nanoparticles in a microwave oven and their application for blood serum sensing of cardiac patients
    (2010) Ferrer-Torres, Edmy J.; Castro-Rosario, Miguel E.; College of Arts and Sciences - Sciences; Hernández-Rivera, Samuel P.; Patrón, Francis; Rios Steiner, Jorge L.; Irizarry, Roberto; Department of Chemistry; Hernández, Arturo J.
    Nanoparticles include any type of particle up to 100 nm in size. Because of their properties, they play an important role in a wide variety of fields. We report here the formation of CdS nanoparticles from the microwave assisted reaction of Cd(CH3CO2)2 with DMSO. DMSO serves as the solvent and as a controlled source of sulfide ions to form (CdS) 1≤n≤5 clusters at the early stages of the process. The clusters grow into CdS nanoparticles, with diameters that range from 1.6 nm up to over 250 nm, with microwave heating time. The time dependence of the onset of light absorption and absorbance near the band edge are consistent with a concurrent nucleation and growth processes. The formation of clusters and nuclei and their subsequent reactions is controlled by turning on and off the energy supply consistent with an energy barrier to CdS nanostructures formation. The use of sensors to improve health and our quality of life are just some of the applications that sensors have. Nanotechnology may represent a tool for the improvement in our quality of life by providing a platform for new sensors or sensing element components that can be integrated into functional sensors to monitor chemicals closely related to health issues. Coronary heart disease is the leading cause of death for both men and women in USA. We present results on the evaluation of the response of CdS semiconductor nanoparticles in the serum of patients who have been evaluated for cardiac troponin. Our method results in an improvement in the detection limit compare with the Abbott method essay currently employed in clinical tests. Detection limits of the orders of a few nanograms were established in studies of the serum of three patients. This represents a factor of 103 compared to the Abbott clinical test.