Welcome to Tao Ye group websiteThe central theme of our research efforts is to measure and control single molecules at interfaces and evaluate their potential in nanoscale devices. Toward this end, we combine nanolithography with molecular self-assembly to control the spatial arrangement of molecules. We use surface analysis tools such as in situ scanning probe microscopy (SPM) and vibrational spectroscopy to understand the reactions, assembly and motion of molecules both ensemble and at the single molecule level. The feedbacks we gain from nanoscale measurements allow us to develop new strategies to design and assemble molecules that can serve as foundations of molecular scale devices, such as molecular electronic switches, nanoscale machines, single molecule sensors. Students in our group receive broad training in surface chemistry, electrochemistry and nanofabrication. To bring in additional expertise, we collaborate with synthetic chemists, theoreticians, and biochemists. Currently we are engaged in two research directions. Biological machines capable of controlled mechanical motion play a central role in the enormous complexity of biological systems. We are creating a toolbox in the nanoscale world, artificial molecular machines, that may bring new capabilities in nanoscale assembly. We are also developing new methods in the hierarchical assembly and analysis of single molecule biopolymers. Another active area is the assembly of anisotropic quantum dots to achieve optimum light absorption and charge transport required for solar energy conversion.
Scanning tunneling microscope image of a chain of azo benzene molecules (purple region) assembled in an ordered matrix of alkanethiol self -assembled monolayers (blue regions). The azobenzene molecules have been observed to change conformations upon light irradiation.
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GaSe quantum dots on a gold surface.
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