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Yong L. Joo

  • Yong L. Joo
  • Dept: Chemical and Biomolecular Engineering
  • Title: Professor
  • Address: 340 Olin Hall
  • Phone: 607 255-8591
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Yong Lak Joo is a professor in the School of Chemical & Biomolecular Engineering at Cornell University. He received his B.S. degree at Seoul National University in Korea in 1989, and received his M.S. and Ph.D. in Chemical Engineering at Stanford University in 1993. From 1993 and 1999, he was a senior research engineer at Hanwha Chemical Corporation in Korea. Prior to joining Cornell in 2001, Yong Lak Joo did two years of a postdoctoral research in the Department of Chemical Engineering at MIT. 
His research focuses on the integration of molecular details into a macroscopic level in nanomaterials processing. He received a 3M Faculty Award in 2004. He is also a recipient of a National Science Foundation CAREER Award and a DuPont Young Professor Award. He also received an Excellence in Teaching Award in College of Engineering, Cornell University. He is a fellow of American Institute of Chemical Engineers (AIChE).

Research Interests

Our research focuses on the integration of continuum analysis with molecular details in nanomaterials processing. Areas of current interests include the microstructural rheology and processing of complex fluids, the formation of nanostructures in nanofibers, and the occurrence of viscoelastic instabilities in polymer flows. In particular, we have recently laid the new foundation for experimental and theoretical studies on advanced, scalable manufacturing processes based on the flow instability such as gas-assisted electrospinning and Taylor-Couette (T-C) reactors with axial flow. Incorporation of high loading of inorganic precursors into water-soluble polymers in gas-assisted electrospinning gave rise to cost-effective, facile production of metallic and ceramic nanofibers. Comprehensive mesoscale modeling and simulation studies on the dynamics of confined assembly of block copolymer/nanoscale filler systems lead to ceramic and metallic nanofibers with tailored nanostructures such as ordered mesopores which are being used in reaction studies in various catalysts and energy storage devices. The newly developed model reactor based on continuous T-C offers fundamental studies on the effect of flow structures on crystallization, absorption, extraction and chemical reactions.

Teaching Interests

* Graduate Teaching - Mathematical Method in Chemical Engineering; Advanced Fluid Mechanics and Heat Transfer * Undergraduate Teaching - Plant Design; Analysis of Separation Processes


Selected Publications

  • Yin, J., J. M. Carlin, J. Kim, Z. Li, J. H. Park, B. Patel, S. Chakrapani, S. Lee, Yong L. Joo. 2015. "Synergy between Metal Oxide Nanofibers and Graphene Nanoribbons for Rechargeable Lithium-Oxygen Battery Cathodes." Advanced Energy Materials 5: 1401412.
  • Kim, Y. S., G. Shoorideh, Y. Zhmayev, J. H. Lee, Z. Li, B. Patel, J. H. Park, S. Chaprapani, S. Lee, Yong L. Joo. 2015. "Critical Contribution of Unzipped Graphene Nanoribbons to Stable Silicon Rich-Carbon Fiber Anodes for Rechargeable Li-ion Batteries." Nano Energy 16: 446-457.
  • Smith, S A., B P. Williams, Yong L. Joo. 2017. "Effect of polymer and ceramic morphology on the material and electrochemical properties of electrospun PAN/polymer derived ceramic composite nanofiber membranes for lithium ion battery separators." Journal of Membrane Science 526: 315-322.
  • Smith, S A., J H. Park, B P. Williams, Yong L. Joo. 2017. "Polymer/ceramic co-continuous nanofiber membranes via room-curable organopolysilazane for improved lithium-ion battery performance." Journal of Materials Science 52 (7): 3657-3669.
  • Fei, Ling, Sang Ha Yoo, R. Villamayor, Brian P. Williams, Sunyoung Gong, Sunchan Park, Kyusoon Shin, Yong L. Joo. 2017. "Graphene Oxide Involved Air-controlled Electrospray for Ultrauniform, Ultrafast, Instantly-Dry, and Binder-Free Electrode Fabrication." ACS Applied Materials & Interfaces.

Selected Awards and Honors

  • Fellow, American Institute of Chemical Engineers (AIChE) 2016
  • Micheal Tien '72 Excellence in Teaching Award (Cornell University) 2006
  • DuPont Young Professor Award (DuPont) 2005
  • National Science Foundation CAREER Award (National Science Foundation) 2005
  • 3M Faculty Award (3M Corporation) 2004



  • BS (Chemical Engineering), Seoul National University, 1989
  • MS (Chemical Engineering), Stanford University, 1990
  • Ph D (Chemical Engineering), Stanford University, 1993