@article{na_ayres_chandra_chu_gorman_parsons_2007, title={Conduction mechanisms and stability of single molecule nanoparticle/molecule/nanoparticle junctions}, volume={18}, number={3}, journal={Nanotechnology}, author={Na, J. S. and Ayres, J. and Chandra, K. L. and Chu, C. and Gorman, C. B. and Parsons, G. N.}, year={2007} }
 @article{chu_na_parsons_2007, title={Conductivity in alkylamine/gold and alkanethiol/gold molecular junctions measured in molecule/nanoparticle/molecule bridges and conducting probe structures}, volume={129}, ISSN={["1520-5126"]}, DOI={10.1021/ja064968s}, abstractNote={Charge transport through alkane monolayers on gold is measured as a function of molecule length in a controlled ambient using a metal/molecule/nanoparticle bridge structure and compared for both thiol and amine molecular end groups. The current through molecules with an amine/gold junction is observed to be more than a factor of 10 larger than that measured in similar molecules with thiol/gold linkages. Conducting probe atomic force microscopy is also used to characterize the same monolayer systems, and the results are quantitatively consistent with those found in the nanoparticle bridge geometry. Scaling of the current with contact area is used to estimate that ∼100 molecules are probed in the nanoparticle bridge geometry. For both molecular end groups, the room-temperature conductivity at low bias as a function of molecule length shows a reasonable fit to models of coherent nonresonant charge tunneling. The different conductivity is ascribed to differences in charge transfer and wave function mixing at the metal/molecule contact, including possible effects of amine group oxidation and molecular conformation. For the amine/Au contact, the nitrogen lone pair interaction with the gold results in a hybrid wave function directed along the molecule bond axis, whereas the thiol/Au contact leads to a more localized wave function.}, number={8}, journal={JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, author={Chu, Changwoong and Na, Jeong-Seok and Parsons, Gregory N.}, year={2007}, month={Feb}, pages={2287–2296} }
 @article{chu_ayres_stefanescu_walker_gorman_parsons_2007, title={Enhanced conduction through isocyanide terminal groups in alkane and biphenylene molecules measured in molecule/nanoparticle/molecule junctions}, volume={111}, ISSN={["1932-7447"]}, DOI={10.1021/jp065377r}, abstractNote={Electrical conductance through conjugated biphenyl and saturated alkane molecules on gold electrodes is characterized using a molecule/nanoparticle/molecule electrical test-bed assembly, and comparisons are made between molecules containing isocyanide (−NC) and thiol (−S) terminal groups bound to the gold. Current versus voltage analysis is consistent with charge tunneling through all systems studied. For molecules containing biphenyl, diphenyl acetylene, and alkane bridges, those containing an isocyanide terminal group show an order of magnitude increase in conductance as compared to those containing a thiol terminal group. Various theoretical predictions of the effect of isocyanide terminal groups on charge transfer through conjugated molecular systems are discussed and related to the results observed for charge transfer through conjugated and saturated molecules. The similar trends in charge transport observed for the different metal/linker interfaces suggest that the metal/linker contact plays an important role in interface electronic structure, even when the molecules are expected to have very different electron delocalization across the backbone.}, number={22}, journal={JOURNAL OF PHYSICAL CHEMISTRY C}, author={Chu, Changwoong and Ayres, J. A. and Stefanescu, D. M. and Walker, B. R. and Gorman, Christopher B. and Parsons, Gregory N.}, year={2007}, month={Jun}, pages={8080–8085} }
 @article{chu_parsons_2006, title={Solvent enhanced resist flow for room temperature imprint lithography}, volume={24}, ISSN={["2166-2746"]}, DOI={10.1116/1.2180258}, abstractNote={Imprint lithography generally requires heating to decrease the resist viscosity to achieve sufficient flow. Procedures using little or no heating are of interest for organic devices and for patterning materials on flexible plastic substrates. This article describes a procedure to imprint resist patterns at room temperature using commercial resist materials, where residual solvent remaining in the resist after spin coating is used to reduce the resist viscosity and enhance the deformation ability. This room temperature imprint shows results comparable with the elevated temperature processes done at 165°C, suggesting similar resist viscosity under the conditions studied. The imprinted depth decreases with elapsed time after coating, consistent with time-dependent evaporation of solvent from the resist bulk.}, number={2}, journal={JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B}, author={Chu, C and Parsons, GN}, year={2006}, pages={818–822} }