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Optical and Thermal Investigation of Sol-Gel Derived Eu^{3+}:Y_2SiO_5 Nanoparticles

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Krsmanović R., Andrić Ž., Marinović-Cincović M., Zeković I., Dramićanin M.

Acta Physica Polonica A

2007

vol. 112

issue 5

975-980

Investigation done on Y_2SiO_5 nanoparticles doped with Eu^{3+} ions obtained with the alkoxy sol-gel route is presented in this paper. We investigate the optical and thermal properties of obtained material during the conversion of the gel into nanocrystalline form. Fourier transform infrared spectroscopy and fluorescence spectroscopy of Eu^{3+} ions are used for the optical characterizations, while thermal analysis is done with thermogravimetric-differential thermal analysis technique. Material exhibits characteristic luminescence emission of the trivalent europium ion.

Optical Biopsy Method for Breast Cancer Diagnosis Based on Artificial Neural Network Classification οf Fluorescence Landscape Data

100%

Dramićanin T., Zeković I., Dimitrijević B., Ribar S., Dramićanin M.

Acta Physica Polonica A

2009

vol. 116

issue 4

690-692

Supervised self-organizing map, a type of artificial neural network, is applied for classification of human breast tissue samples utilizing data obtained from fluorescence landscape measurements. Female breast tissue samples were taken soon after the surgical resection, identified and stored at -80°C until fluorescence measurements. From fluorescence landscapes obtained in UV-VIS region spectral features showing statistically significant differences between malignant and normal samples are identified and further quantified to serve as a training input to neural network. Additional set of samples was used as a test group input to trained network in order to evaluate performance of proposed optical biopsy method. Classification sensitivity of 83.9% and specificity of 88.9% are found.

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2 Acta Physica Polonica A

1 2009

1 2007

2 Dramićanin M.

2 Zeković I.

1 Andrić Ž.

1 Dimitrijević B.

1 Dramićanin T.

1 Krsmanović R.

1 Marinović-Cincović M.

1 Ribar S.

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Optical and Thermal Investigation of Sol-Gel Derived Eu^{3+}:Y_2SiO_5 Nanoparticles

Optical Biopsy Method for Breast Cancer Diagnosis Based on Artificial Neural Network Classification οf Fluorescence Landscape Data