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Title: Synthesis of freestanding single-crystal perovskite films and heterostructures by etching of sacrificial water-soluble layers

Here, the ability to create and manipulate materials in two-dimensional (2D) form has repeatedly had transformative impact on science and technology. In parallel with the exfoliation and stacking of intrinsically layered crystals 1, 2, 3, 4, 5, atomic-scale thin film growth of complex materials has enabled the creation of artificial 2D heterostructures with novel functionality 6, 7, 8, 9 and emergent phenomena, as seen in perovskite heterostructures 10, 11, 12. However, separation of these layers from the growth substrate has proved challenging, limiting the manipulation capabilities of these heterostructures with respect to exfoliated materials. Here we present a general method to create freestanding perovskite membranes. The key is the epitaxial growth of water-soluble Sr 3Al 2O 6 on perovskite substrates, followed by in situ growth of films and heterostructures. Millimetre-size single-crystalline membranes are produced by etching the Sr 3Al 2O 6 layer in water, providing the opportunity to transfer them to arbitrary substrates and integrate them with heterostructures of semiconductors and layered compounds 13, 14.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [3]
  1. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Cornell Univ., Ithaca, NY (United States). Baker Lab.
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
  4. Cornell Univ., Ithaca, NY (United States)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Report Number(s):
SLAC-PUB-16802
Journal ID: ISSN 1476-1122; nmat4749
Grant/Contract Number:
AC02-76SF00515
Type:
Accepted Manuscript
Journal Name:
Nature Materials
Additional Journal Information:
Journal Name: Nature Materials; Journal ID: ISSN 1476-1122
Publisher:
Nature Publishing Group
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1326981

Lu, Di, Baek, David J., Hong, Seung Sae, Kourkoutis, Lena F., Hikita, Yasuyuki, and Hwang, Harold Y.. Synthesis of freestanding single-crystal perovskite films and heterostructures by etching of sacrificial water-soluble layers. United States: N. p., Web. doi:10.1038/nmat4749.
Lu, Di, Baek, David J., Hong, Seung Sae, Kourkoutis, Lena F., Hikita, Yasuyuki, & Hwang, Harold Y.. Synthesis of freestanding single-crystal perovskite films and heterostructures by etching of sacrificial water-soluble layers. United States. doi:10.1038/nmat4749.
Lu, Di, Baek, David J., Hong, Seung Sae, Kourkoutis, Lena F., Hikita, Yasuyuki, and Hwang, Harold Y.. 2016. "Synthesis of freestanding single-crystal perovskite films and heterostructures by etching of sacrificial water-soluble layers". United States. doi:10.1038/nmat4749. https://www.osti.gov/servlets/purl/1326981.
@article{osti_1326981,
title = {Synthesis of freestanding single-crystal perovskite films and heterostructures by etching of sacrificial water-soluble layers},
author = {Lu, Di and Baek, David J. and Hong, Seung Sae and Kourkoutis, Lena F. and Hikita, Yasuyuki and Hwang, Harold Y.},
abstractNote = {Here, the ability to create and manipulate materials in two-dimensional (2D) form has repeatedly had transformative impact on science and technology. In parallel with the exfoliation and stacking of intrinsically layered crystals1, 2, 3, 4, 5, atomic-scale thin film growth of complex materials has enabled the creation of artificial 2D heterostructures with novel functionality6, 7, 8, 9 and emergent phenomena, as seen in perovskite heterostructures10, 11, 12. However, separation of these layers from the growth substrate has proved challenging, limiting the manipulation capabilities of these heterostructures with respect to exfoliated materials. Here we present a general method to create freestanding perovskite membranes. The key is the epitaxial growth of water-soluble Sr3Al2O6 on perovskite substrates, followed by in situ growth of films and heterostructures. Millimetre-size single-crystalline membranes are produced by etching the Sr3Al2O6 layer in water, providing the opportunity to transfer them to arbitrary substrates and integrate them with heterostructures of semiconductors and layered compounds13, 14.},
doi = {10.1038/nmat4749},
journal = {Nature Materials},
number = ,
volume = ,
place = {United States},
year = {2016},
month = {9}
}

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