- Physical Review Journals
All JournalsPhysics Magazine

Physical Review Letters

Export citation

Export citation

Choose format for download:

Download Citation
  • Editors' Suggestion

Anomalous Depletion of Pore-Confined Carbon Dioxide upon Cooling below the Bulk Triple Point: An In Situ Neutron Diffraction Study

K. L. Stefanopoulos1, F. K. Katsaros1, Th. A. Steriotis1,*, A. A. Sapalidis1, M. Thommes2, D. T. Bowron3, and T. G. A. Youngs3

  • 1Institute of Nanoscience and Nanotechnology, NCSR “Demokritos”, 15310 Ag. Paraskevi Attikis, Athens, Greece
  • 2Quantachrome Instruments, 1900 Corporate Drive, Boynton Beach, Florida, USA
  • 3ISIS Neutron and Muon Source, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, United Kingdom

  • *t.steriotis@inn.demokritos.gr
PDF

Phys. Rev. Lett. 116, 025502 – Published 14 January, 2016

DOI: https://doi.org/10.1103/PhysRevLett.116.025502

Abstract

The phase behavior of sorbed CO2 in an ordered mesoporous silica sample (SBA-15) was studied by neutron diffraction. Surprisingly, upon cooling our sample below the bulk critical point, confined CO2 molecules neither freeze nor remain liquid as expected, but escape from the pores. The phenomenon has additionally been confirmed gravimetrically. The process is reversible and during heating CO2 refills the pores, albeit with hysteresis. This depletion was for the first time observed in an ordered mesoporous molecular sieve and provides new insight on the phase behavior of nanoconfined fluids.

View figure in article

Physics Subject Headings (PhySH)

Authorization Required

We need you to provide your credentials before accessing this content.

Other Options

Supplemental Material (Subscription Required)

References (Subscription Required)

Outline

Information

Phys. Rev. Lett. 116, 025502– Published 14 January, 2016
  • Received 9 July 2015

© 2016 American Physical Society

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation