TY - JOUR
T1 - 2D zeolite coatings
T2 - Langmuir-Schaefer deposition of 3 nm thick MFI zeolite nanosheets
AU - Rangnekar, Neel
AU - Shete, Meera
AU - Agrawal, Kumar Varoon
AU - Topuz, Berna
AU - Kumar, Prashant
AU - Guo, Qiang
AU - Ismail, Issam
AU - Alyoubi, Abdulrahman
AU - Basahel, Sulaiman
AU - Narasimharao, Katabathini
AU - Macosko, Christopher W.
AU - Mkhoyan, K. Andre
AU - Al-Thabaiti, Shaeel
AU - Stottrup, Benjamin
AU - Tsapatsis, Michael
N1 - Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - 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.
AB - 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.
KW - Langmuir trough
KW - nanosheets
KW - surface chemistry
KW - thin films
KW - zeolites
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U2 - 10.1002/anie.201411791
DO - 10.1002/anie.201411791
M3 - Article
C2 - 25864539
AN - SCOPUS:84930204625
SN - 1433-7851
VL - 54
SP - 6571
EP - 6575
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 22
ER -