Under the Surface of a Painting

Hello again!

Due to our collaboration with Shelley Svoboda at the Dewitt Wallace Collections and Conservation building, my lab has access to historical oil paintings to sample and study.  Currently, the piece of interest in my project is the portrait of Mrs. Nelson by Robert Feke, an American artist.  Despite the fact that the subject of the portrait is wearing a blue dress, yellows may be hiding among the paint layers.

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End of the Summer

Hello,

This summer has been so productive and fun at the same time! For  a quick summary, my research is related to solar energy cells and understanding electron transfer between organic dyes and the semiconductor TiO2. The end goal was to find a probability distribution function that best fit the data to represent the system and kinetics behind electron transfer.  I collected data of Rhodamine B on glass, Rhodamine B on TiO2 and Rhodamine 6G on TiO2. After working up the data to test if the Power Law is a goof probability function, I rewrote a code to test the Weibull function. Interestingly enough, the power law best fit both RB on Tio2 and R6G on TiO2 on times, while Weibull best fit all of the off time data sets. Unfortunately, there might still be some glitches in the code for a Weibull function, but I am working on hammering out these problems by the end of the week. Despite this, these results are very interesting, and next I will be working towards re-writing a code to test a stretched exponential function. I have learned so much about statistics and probability and have put my math skills to the test, but decided that I really enjoy math and am happy this summer was another way to confirm that.

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