Single Molecule Investigation of Dye Fading in Anthroquinone Dyes

This summer I will be working in the Wustholz lab doing research on Antrhoquinone dye pigments using single molecule spectroscopy. These dye pigments are common in various historical artworks; including some that are part of the Colonial Williamsburg Collection. The problem with these pigments is that they tend to fade over time– destroying the painting. This study seeks to probe the photo physics of individual, isolated molecules using a technique known as single molecule spectroscopy in order to understand the mechanism by which these dyes fade which will ultimately allow us to better preserve priceless works of art. While studies have been done on these molecules before, they have not investigated the behavior of individual molecules in isolation which is crucial to determining the actual mechanism of the fading. So far single molecule data has been collected on all of the relevant anthroquinone dyes and all that is left is to correlate the data to functions and a physical theoretical mechanism.

Water, water, (not quite) everywhere

My name is Claire Goydan, and I’m a junior here at the College of William & Mary. I am studying Geology and Environmental Science. This summer, I will delve deeper in the humid swamp of Williamsburg, Virginia to better understand water, and how it moves.

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Abstract: Performance Art and Racial Justice at William and Mary

Hello! My name is Johnna Moore and I will be researching Performance Art and Racial Justice at the College of William and Mary for the 2015 Summer. I have been graciously funded by the Lemon Project and I am super excited to be able to have this opportunity.

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The Perception of Korean Consonants

Hello!

My name is Anna Henshaw, and I am a sophomore and a Linguistics major. My project this summer will deal with the perception of a certain group of Korean consonants; what characteristics of the consonants and their surrounding vowels are the strongest cues for perceiving that specific consonant.

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Abstract: Mercury Sensing with Doped Conjugated Polymer Nanoparticles

Hi Everyone!

My name is Sumaia Tabassum, and I am a rising junior. I am majoring in chemistry and I will be working in Dr. Harbron’s Organic Chemistry lab this summer. Our project has been ongoing for several years through the hands of various student faculty collaborations. They developed fluorescent nanoparticles that could detect mercury in water at concentrations as low as 0.7 parts per billion (ppb).  Created from conjugated polymers, these nanoparticles are small, stably suspended in water, and highly fluorescent in the green-yellow region of the spectrum (Childress and Roberts, 2012).  These nanoparticles can be doped with mercury-responsive dye molecules.  These dyes are non-fluorescent until  they come in contact with mercury, which transforms them into red-fluorescent dyes that quench the fluorescence of the nanoparticles by a mechanism called Fluorescence Resonance Energy.

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