Laboratory of Advanced Separations (LAS)


 Crystallization of 2-dimensional nanoporous materials and membranes – Molecular transport through 2-dimensional films

At LAS, we are developing novel two-dimensional (2-d) nanoporous materials and membranes using a number of material platforms including graphene, carbon nitrides, metal-organic frameworks (MOFs), and silicates. Overall, we are engineering large-area, nm-thick films with with a precise control of nanopore size and functionality.  In the next few years, LAS will pursue:
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  1. Synthesis for two-dimensional nanoporous materials by atomic layer deposition (ALD), chemical vapor deposition (CVD), hydrothermal synthesis, exfoliation, etc.
  2. Elucidation of crystal growth mechanism.
  3. Study of thin, high throughput membranes and membrane reactors.
  4. Elucidation of molecular transport mechanism.
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Selected Publications

G. He, S. Huang, L. F. Villalobos, J. Zhao, M. Mensi, E. Oveisi, M Rezaei, K. V. Agrawal, “High-permeance polymer-functionalized single-layer graphene membranes that surpass the postcombustion carbon capture target”, Energy & Environmental Sciences, 2019, doi: 10.1039/C9EE01238A.  Click here for pdf.

D. J. Babu, G. He, J. Hao, M. T. Vahdat, P. A. Schouwink, M. Mensi, K. V. Agrawal, “Restricting Lattice Flexibility in Polycrystalline Metal-Organic Framework Membrane for Carbon Capture”, Advanced Materials, 2019,1900855.

J. Zhao, G. He, S. Huang, L. F. Villalobos, M. Dakhchoune, H. Bassas, E. Oveisi, K. V. Agrawal, “Etching nanopores in single-layer graphene with an angstrom precision for high-performance gas separation”, Science Advances, 5, eaav1851.

S. Huang, M. Dakhchoune, W. Luo, E. Oveisi, G. He, M. Rezaei, J. Zhao, A. Züttel, M. S. Strano, K. V. Agrawal, “Large-area single-layer graphene membranes by crack-free transfer for gas mixture separation”, Nature Communications, 9, 2632, 2018.

G. He., M. Dakhchoune, J. Zhao, S. Huang, K. V. Agrawal, “Electrophoretic Nuclei Assembly for Crystallization of High Performance Membranes on Unmodified Supports”, Advanced Functional Materials, 28, 1707427, 2018.

K. V. Agrawal, S. Shimizu, L. W. Drahushuk, D. Kilcoyne, M. S. Strano, “Observation of Extreme Phase Transition Temperatures of Water Confined Inside Isolated Carbon Nanotube Nanopores”, Nature Nanotechnology, 12, 267, 2017.

K. Varoon (Agrawal), X. Zhang, B. Elyassi, D. D. Brewer, M. Gettel, S. Kumar, J. A. Lee, S. Maheshwari, A. Mittal, C. Y. Sung, M. Cococcioni, L. F. Francis, A. V. McCormick, K. A. Mkhoyan, M. Tsapatsis, “Dispersible Exfoliated Zeolite Nanosheets and Their Application as a Selective Membrane”, Science, 334, 72, 2011.


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