Publications by authors named "Jeewhan Oh"

Redox-active tetraoxolene ligands such as 1,4-dihydroxybenzoquinone provide access to a diversity of metal-organic architectures, many of which display interesting magnetic behavior and high electrical conductivity. Here, we take a closer look at how structure dictates physical properties in a series of 1D iron-tetraoxolene chains. Using a diphenyl-derivatized tetraoxolene ligand (HPhdhbq), we show that the steric profile of the coordinating solvent controls whether linear or helical chains are exclusively formed.

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Article Synopsis
  • A new nanoscale phenomenon called ion concentration polarization (ICP) causes significant pH changes in fluid samples, prompting research into its origins and management strategies.
  • * Instead of negating these pH changes, the study explores how to harness them, such as creating controlled pH gradients by applying electric current through a proton exchange membrane.
  • * The research also shows that the pH level can be monitored using pH-responsive hydrogels, which act as barriers in microchannels depending on whether the pH is above or below a certain threshold, leading to potential applications in localized pH stimulation and portable pH sensing.
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Recently, the ion concentration polarization (ICP) phenomenon has been actively utilized for low abundance biomolecular preconcentration applications. Since ICP significantly rearranges the ion distribution near a permselective membrane, its detailed investigation should be conducted for developing efficient platforms. In particular, proton transport through the membrane critically affects the pH of sample solutions so that continuous monitoring or batch measurement of pH is the priority task to be carried out.

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