title: 2D Zeolite Coatings: Langmuir-Schaefer Deposition of 3 nm Thick MFI Zeolite Nanosheets.
abstract: Stable suspensions of zeolite nanosheets (3 nm thick MFI layers) were prepared in ethanol following acid treatment, which partially removed the associated organic structure-directing agent. Nanosheets from these suspensions could then be dispersed at the air-water interface and transferred to silicon wafers using Langmuir-Schaefer deposition. Using layer-by-layer deposition, control on coating thickness was demonstrated. In-plane X-ray diffraction (XRD) revealed that the deposited nanosheets contract upon calcination similar to bulk MFI crystals. Different methods for secondary growth resulted in preferentially oriented thin films of MFI, which had sub-12-nm thickness in certain cases. Upon calcination, there was no contraction detectable by in-plane XRD, indicating well-intergrown MFI films that are strongly attached to the substrate.
authors: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455 (USA).
authors: Neel
authors: N
authors: Rangnekar
authors: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455 (USA).
authors: Meera
authors: M
authors: Shete
authors: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455 (USA).
authors: Kumar Varoon
authors: KV
authors: Agrawal
authors: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455 (USA).
authors: Berna
authors: B
authors: Topuz
authors: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455 (USA).
authors: Prashant
authors: P
authors: Kumar
authors: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455 (USA).
authors: Qiang
authors: Q
authors: Guo
authors: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455 (USA).
authors: Issam
authors: I
authors: Ismail
authors: Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, 21589 (Saudi Arabia).
authors: Abdulrahman
authors: A
authors: Alyoubi
authors: Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, 21589 (Saudi Arabia).
authors: Sulaiman
authors: S
authors: Basahel
authors: Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, 21589 (Saudi Arabia).
authors: Katabathini
authors: K
authors: Narasimharao
authors: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455 (USA).
authors: Christopher W
authors: CW
authors: Macosko
authors: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455 (USA).
authors: K Andre
authors: KA
authors: Mkhoyan
authors: Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, 21589 (Saudi Arabia).
authors: Shaeel
authors: S
authors: Al-Thabaiti
authors: Department of Physics, Augsburg College, 2211 Riverside Avenue, Minneapolis, MN 55454 (USA). stottrup@augsburg.edu.
authors: Benjamin
authors: B
authors: Stottrup
authors: Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE, Minneapolis, MN 55455 (USA). tsapatsis@umn.edu.
authors: Michael
authors: M
authors: Tsapatsis
mesh_terms: D018625:Microscopy, Atomic Force; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014961:X-Ray Diffraction; D017641:Zeolites / Q000737:chemistry*
chemical_list: D017641:Zeolites
keywords: Langmuir trough; nanosheets; surface chemistry; thin films; zeolites