Barnes Group Official Website

GroupMembersGroupMembersGroupMembersGroupMembers


	Dr. Michael D. Barnes	Bio
Graduate Students
	Austin Cyphersmith	Austin received his undergraduate degree in Chemistry and Physics from the University of Pittsburgh in 2008. He joined the Barnes Lab inearly 2009. His project focuses on studying the molecular orientationdependence of chiroptical responses for single molecules. Recently, he has been researching how the polarization properties of emitted light from CdSe-ZnS quantum dots depends on quantum dot orientation.
	Joelle Labastide
e	Mina Baghgar
	Michael Y.Odoi
Undergraduates
	Danielle Sowle
	Jeremy Graham
	Michael Louis
	Julie Stiver
	Artem Maksov
Distinguished Alumni
	Kevin T. Early	Kevin joined the group in 2005. He uses single particle and scanning probe microscopy to study size-correlated photophysical behaviors in single semiconductor nanoparticles. He was awarded an NSF IGERT fellowship in 2007, The Richard K. and Meryl M. Brown graduate chemistry fellowship in 2009, and spent 2 months in 2008 as a visiting scholar at ETH Zurich. He defended his thesis, entitled "Charge and Energy Transport in Single Hybrid Quantum Dot/Organic Nanostructures," in April 2010. He also wears laser glasses to parties, which we forgive him for because he is so talented.
	Ruthanne Hassey-Paradise	Ruthanne has recently graduated from the Barnes group, earning her PhD. in Chemistry. While in the Barnes group, her research focused on probing the chiroptical response of individual helicene molecules. By studying individual chiral molecules using fluorescence excitation circular dichroism, she was able to observe a broad range of circular anisotropy values for specific molecules, and published the results of her work in Science (!) and Chirality. Currently, she has a post-doctoral position at New York University working in Dr. Bart Kahr's lab, where she studies the chiroptical properties of chiral or achiral molecules oriented in crystals.
	JinHoung Kim
	Nathan Hammer
	Tim Mortsolf
Post Docs
	Kevin McCarthy
	Yikuan Wang	In my current post-doctoral work, we build a scanning microscope which allows for the detection of fluorescent single molecule confocal and wide-field imaging pattern. For the first time in dipole emission studies, I find the time-averaged Poynting vector of 2D elliptical (circular) molecule emitters is the sum of the two principal linear dipole emitter components. I also work out the confocal and wide-field defocused image calculation of 2D dipole emitters based on the general imaging theory of Richards and Wolf for the aplanatic optical systems. The pretty straight forward dipole field approach of Ford and Weber allows for minimum assumptions for this calculation, thus makes the defocused imaging calculation more accurate than ever. I also developed a new algorithm for image pattern recognition. Combined the defocused image calculation and the pattern recognition algorithm, the orientation of fluorescent single molecules can be determined by wide-field epi-fluorescence microscopy which find many application is physics, chemistry and molecular biology.