Sung Yeol Kim

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The contribution of nanoscale surface roughness on the adsorption of one key cell adhesive protein, fibronectin, on carbon nanotube/poly(carbonate) urethane composites of different surface energies was evaluated. Systematic control of various surface energies by creating different nanosurface roughness features was performed by mixing two promising(More)
Citation Saetia, Kittipong, Jan M. Schnorr, Matthew M. Mannarino, Sung Yeol Kim, Gregory C. Rutledge, Timothy M. Swager, and Paula T. Hammond. “Spray-Layer-by-Layer Carbon Nanotube/Electrospun Fiber Electrodes for Flexible Chemiresistive Sensor Applications.” Adv. Funct. Mater. 24, no. 4 (September 20, 2013): 492–502. As Published(More)
Nanostructures of the conducting polymer poly(3,4-ethylenedioxythiophene) with large surface areas enhance the performance of energy storage devices such as electrochemical supercapacitors. However, until now, high aspect ratio nanofibers of this polymer could only be deposited from the vapor-phase, utilizing extrinsic hard templates such as electrospun(More)
Tailoring cell response on an electrode surface is essential in the application of neural interfaces. In this paper, a method of controlling neuron adhesion on the surface of an electrode was demonstrated using a conducting polymer composite as an electrode coating. The electrodeposited coating was functionalized further with biomolecules-of-interest (BOI),(More)
Viologens, either as anions in solution or as pendant substituents to pyrrole, were incorporated as dopants to electrodeposited films of polypyrrole. The resulting polymer films exhibited redox activity at -0.5 V vs Ag/AgCl. The film consisting of polypyrrole with pendant viologens exhibited the best charge-discharge behavior with a maximum capacity of 55(More)
Recent research has highlighted the potential use of "smart" films, such as graphene sheets, that would allow for the controlled release of a variety of therapeutic drugs. Taking full advantage of these versatile conducting sheets, we investigated the novel concept of applying graphene oxide (GO) and reduced graphene oxide (rGO) materials as both barrier(More)
A 1D organic redox-active material is combined with another 1D conductive material for rechargeable batteries. Poly(vinyl carbazole) (or PVK) and poly(3,4-ethylenedioxythiophene) doped with poly(styrenesulfonate) (or PEDOT:PSS) are used as the redox-active and conductive 1D materials, respectively. Due to their extremely anisotropic geometry, the two(More)
Application of an electric field (EF) has long been used to induce axon outgrowth following nerve injuries. The response of mammalian neurons (e.g., axon length, axon guidance) from the central nervous system (CNS) to an EF, however, remains unclear, whereas those from amphibian or avian neuron models have been well characterized. Thus, to determine an(More)
Minimization of stress-induced mechanical rupture and delamination of conducting polymer (CP) films is desirable to prevent failure of devices based on these materials. Thus, precise in situ measurement of voltage-induced stress within these films should provide insight into the cause of these failure mechanisms. The evolution of stress in films of(More)
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