Perovskite Nanosheets

  • ChemPubSoc Europe Logo
  • Author: ChemNanoMat
  • Published Date: 07 August 2017
  • Source / Publisher: ChemNanoMat/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: Perovskite Nanosheets

The exfoliation of layered oxides to prepare nanosheets and the subsequent modification of nanosheet surfaces via standard techniques can take days. Microwave methods are well-known for facilitating specific chemical reactions, yielding better outcomes in a very short time.

John B. Wiley, University of New Orleans, LA, USA, and colleagues have used microwaves for the efficient exfoliation of double-layered Dion-Jacobson perovskites in 1–2 hours. HLnNb2O7 perovskites (Ln = La, Pr) were efficiently exfoliated in aqueous solutions of tetra(n-butyl)ammonium hydroxide (TBAOH), producing TBA-functionalized nanosheets (<2 nm thick).


Using a microwave approach, a post-exfoliation surface modification of the obtained metal-oxide nanosheets was also possible in under one hour. The TBA+ surface groups were readily replaced with various linear or cyclic organic molecules that contain hydroxyl or amine functional groups.


These methods should be applicable to a large number of layered oxides and organic surface moieties. They could allow the rapid production of various 2D hybrids with potentially novel electronic, magnetic, optical, and mechanical properties.


 

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