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Enhancement and max...
Enhancement and maximum in the isobaric specific-heat capacity measurements of deeply supercooled water using ultrafast calorimetry
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- Pathak, Harshad (författare)
- Stockholms universitet,Fysikum,Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden;
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- Späh, Alexander (författare)
- Stockholms universitet,Fysikum,Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden;
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- Esmaeildoost, Niloofar (författare)
- KTH,Biomedicinsk fysik och röntgenfysik
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- Sellberg, Jonas A., 1985- (författare)
- KTH,Biomedicinsk fysik och röntgenfysik
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- Kim, Kyung Hwan (författare)
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, Republic of Korea;
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- Perakis, Fivos (författare)
- Stockholms universitet,Fysikum,Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden;
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- Amann-Winkel, Katrin (författare)
- Stockholms universitet,Fysikum,Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden;
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- Ladd-Parada, Marjorie (författare)
- Stockholms universitet,Fysikum,Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden;
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- Koliyadu, Jayanath C. P. (författare)
- KTH,Biomedicinsk fysik och röntgenfysik
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- Lane, Thomas J. (författare)
- SLAC National Accelerator Laboratory, Linac Coherent Light Source, Menlo Park, CA 94025;
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- Yang, Cheolhee (författare)
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, Republic of Korea;
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- Lemke, Henrik Till (författare)
- SwissFEL, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
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- Oggenfuss, Alexander Roland (författare)
- SwissFEL, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
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- Johnson, Philip J. M. (författare)
- SwissFEL, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
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- Deng, Yunpei (författare)
- SwissFEL, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
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- Zerdane, Serhane (författare)
- SwissFEL, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
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- Mankowsky, Roman (författare)
- SwissFEL, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
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- Beaud, Paul (författare)
- SwissFEL, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
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- Nilsson, Anders (författare)
- Department of Physics, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden;
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(creator_code:org_t)
- 2021-02
- 2021
- Engelska.
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Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 0027-8424 .- 1091-6490. ; 118:6
- Relaterad länk:
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https://doi.org/10.1...
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https://www.pnas.org...
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https://kth.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Knowledge of the temperature dependence of the isobaric specific heat (Cp) upon deep supercooling can give insights regarding the anomalous properties of water. If a maximum in Cp exists at a specific temperature, as in the isothermal compressibility, it would further validate the liquid–liquid critical point model that can explain the anomalous increase in thermodynamic response functions. The challenge is that the relevant temperature range falls in the region where ice crystallization becomes rapid, which has previously excluded experiments. Here, we have utilized a methodology of ultrafast calorimetry by determining the temperature jump from femtosecond X-ray pulses after heating with an infrared laser pulse and with a sufficiently long time delay between the pulses to allow measurements at constant pressure. Evaporative cooling of ∼15-µm diameter droplets in vacuum enabled us to reach a temperature down to ∼228 K with a small fraction of the droplets remaining unfrozen. We observed a sharp increase in Cp, from 88 J/mol/K at 244 K to about 218 J/mol/K at 229 K where a maximum is seen. The Cp maximum is at a similar temperature as the maxima of the isothermal compressibility and correlation length. From the Cp measurement, we estimated the excess entropy and self-diffusion coefficient of water and these properties decrease rapidly below 235 K.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Nyckelord
- supercooled water
- specific-heat capacity
- fragile-to-strong transition
- liquid liquid critical point
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Pathak, Harshad
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Späh, Alexander
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Esmaeildoost, Ni ...
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Sellberg, Jonas ...
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Kim, Kyung Hwan
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Perakis, Fivos
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Amann-Winkel, Ka ...
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Ladd-Parada, Mar ...
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Koliyadu, Jayana ...
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Lane, Thomas J.
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Yang, Cheolhee
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Lemke, Henrik Ti ...
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Oggenfuss, Alexa ...
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Johnson, Philip ...
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Deng, Yunpei
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Zerdane, Serhane
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Mankowsky, Roman
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Beaud, Paul
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Nilsson, Anders
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- NATURVETENSKAP
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NATURVETENSKAP
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och Den kondenserade ...
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- NATURVETENSKAP
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NATURVETENSKAP
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och Kemi
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Stockholms universitet
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Kungliga Tekniska Högskolan