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Title: Reversible monolayer-to-crystalline phase transition in amphiphilic silsesquioxane at the air-water interface

Abstract

We report on the counter intuitive reversible crystallisation of two-dimensional monolayer of Trisilanolisobutyl Polyhedral Oligomeric SilSesquioxane (TBPOSS) on water surface using synchrotron x-ray scattering measurements. Amphiphilic TBPOSS form rugged monolayers and Grazing Incidence X-ray Scattering (GIXS) measurements reveal that the in-plane inter-particle correlation peaks, characteristic of two-dimensional system, observed before transition is replaced by intense localized spots after transition. The measured x-ray scattering data of the non-equilibrium crystalline phase on the air-water interface could be explained with a model that assumes periodic stacking of the TBPOSS dimers. These crystalline stacking relaxes upon decompression and the TBPOSS layer retains its initial monolayer state. The existence of these crystals in compressed phase is confirmed by atomic force microscopy measurements by lifting the materials on a solid substrate.

Authors:
 [1];  [1];  [1];  [2];  [3];  [3]
  1. Saha Inst. of Nuclear Physics (India)
  2. Univ. du Maine (France)
  3. Univ. of Chicago, IL (United States). Center for Advanced Radiation Sources (CARS)
Publication Date:
Research Org.:
Univ. of Chicago, IL (United States). Center for Advanced Radiation Sources (CARS), Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1203602
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Banerjee, R., Sanyal, M. K., Bera, M. K., Gibaud, A., Lin, B., and Meron, M. Reversible monolayer-to-crystalline phase transition in amphiphilic silsesquioxane at the air-water interface. United States: N. p., 2015. Web. doi:10.1038/srep08497.
Banerjee, R., Sanyal, M. K., Bera, M. K., Gibaud, A., Lin, B., & Meron, M. Reversible monolayer-to-crystalline phase transition in amphiphilic silsesquioxane at the air-water interface. United States. https://doi.org/10.1038/srep08497
Banerjee, R., Sanyal, M. K., Bera, M. K., Gibaud, A., Lin, B., and Meron, M. 2015. "Reversible monolayer-to-crystalline phase transition in amphiphilic silsesquioxane at the air-water interface". United States. https://doi.org/10.1038/srep08497. https://www.osti.gov/servlets/purl/1203602.
@article{osti_1203602,
title = {Reversible monolayer-to-crystalline phase transition in amphiphilic silsesquioxane at the air-water interface},
author = {Banerjee, R. and Sanyal, M. K. and Bera, M. K. and Gibaud, A. and Lin, B. and Meron, M.},
abstractNote = {We report on the counter intuitive reversible crystallisation of two-dimensional monolayer of Trisilanolisobutyl Polyhedral Oligomeric SilSesquioxane (TBPOSS) on water surface using synchrotron x-ray scattering measurements. Amphiphilic TBPOSS form rugged monolayers and Grazing Incidence X-ray Scattering (GIXS) measurements reveal that the in-plane inter-particle correlation peaks, characteristic of two-dimensional system, observed before transition is replaced by intense localized spots after transition. The measured x-ray scattering data of the non-equilibrium crystalline phase on the air-water interface could be explained with a model that assumes periodic stacking of the TBPOSS dimers. These crystalline stacking relaxes upon decompression and the TBPOSS layer retains its initial monolayer state. The existence of these crystals in compressed phase is confirmed by atomic force microscopy measurements by lifting the materials on a solid substrate.},
doi = {10.1038/srep08497},
url = {https://www.osti.gov/biblio/1203602}, journal = {Scientific Reports},
issn = {2045-2322},
number = ,
volume = 5,
place = {United States},
year = {Tue Feb 17 00:00:00 EST 2015},
month = {Tue Feb 17 00:00:00 EST 2015}
}

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Cited by: 6 works
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