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Search Publications by: Edwin P Chan (Fed)

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Displaying 51 - 75 of 117

Nanoscale Pillar-enhanced Tribological Surfaces as Antifouling Membranes

October 24, 2016
Author(s)
Edwin P. Chan, Wansuk Choi, Won-Gi Ahn, Jong-Hyun Park, Hyun W. Jung, Seungkwan Hong, Ji-Young Han, Sangpil Park, Doo-Hyun Ko, Jung-Hyun Lee
We present a nonconventional membrane surface modification approach that utilizes surface topography to manipulate the tribology of foulant accumulation on water desalination membranes via imprinting of submicron titanium dioxide (TiO2) pillar patterns

Signatures of intracrystallite and intercrystallite limitations of charge transport in polythiophenes

September 20, 2016
Author(s)
Kiarash Vakhshouri, Brandon Smith, Edwin Chan, Chenchen Wang, Alberto Salleo, Cheng Wang, Alexander Hexemer, Enrique Gomez
Charge carrier mobilities in conjugated semicrystalline polymers depend on morphological parameters such as crystallinity, crystal orientation, and connectivity between ordered regions. Despite recent progress in the development of conducting polymers, the

Tailor-Made Polyamide Membranes for Water Desalination

December 30, 2014
Author(s)
Edwin P. Chan, Wansuk Chol, Joona Bang, Jong Suk Lee, Jung-Hyun Lee, Joung-Eun Gu
Independent control over the extrinsic and intrinsic properties of the polyamide selective layer is critical when designing water desalination reverse osmosis (RO) membranes with performance characteristics required for water purification applications

Tailoring the Permselectivity of Water Desalination Membranes via Nanoparticle Assembly

January 6, 2014
Author(s)
Edwin Chan, William Mulhearn, Jung-Hyun Lee, Daeyeon Lee, Christopher Stafford
: Thin film composite membranes can selectively separate mono- and di-valent ions from water via solution-diffusion of each species through a dense but ultrathin, highly crosslinked polymer ‘skin' layer - water is transported across the membrane faster

Swelling of Ultrathin Molecular Layer-by-Layer Polyamide Water Desalination Membranes

September 30, 2013
Author(s)
Edwin P. Chan, Allison P. Young, Jung-Hyun Lee, Christopher M. Stafford
The water vapor swelling behavior of ultrathin crosslinked aromatic polyamide films, synthesized via molecular layer-by-layer deposition, is characterized via specular X-ray reflectivity. The results show that these films expand only along the thickness

Molecular Layer-by-Layer Assembled Reverse Osmosis Membranes for Water Desalination

July 12, 2013
Author(s)
Joung-Eun Gu, Seunghye Lee, Wansuk Choi, Jong Suk Lee, Bo-Young Kim, Edwin Chan, Christopher Stafford, Jun-Young Chung, Joona Bang, Jung-Hyun Lee
Here, we report on the successful design, construction, and performance of membranes constructed using the mLbL process and show that these membranes exceed the performance of membranes synthesized through conventional interfacial polymerization. In our

Mechanochromic photonic gels

June 10, 2013
Author(s)
Edwin P. Chan, A M. Urbas, Joseph J. Walish, Edwin L. Thomas
Polymer gels are remarkable materials with physical structures that can adapt significantly and quite rapidly with changes in the local environmental changes such as temperature, light intensity, electrochemistry, and mechanical force. An interesting