Surface structure tuning in alcohol melts by bulk additives

O. Gang; B. M. Ocko; X. Z. Wu; E. B. Sirota; M. Deutsch

doi:10.1016/s0927-7757(99)00392-1

Surface structure tuning in alcohol melts by bulk additives

O. Gang, B. M. Ocko, X. Z. Wu, E. B. Sirota, M. Deutsch

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

Surface freezing, i.e. the formation of a solid bilayer at the surface of a pure alcohol melt above the freezing temperature, was recently discovered. We demonstrate here that the structure of the bilayer can be influenced by specific bulk additives. Two different additives, able to form hydrogen bonds (water) and both hydrogen bonds and van der Waals interactions (α,ω-diols), are used. The surface layer's structure is studied by surface-specific X-ray methods. We find that water swells the bilayer by intercalation into its center at a molecular water:alcohol ratio of approx. 1:2. For the diolated alcohols a reversible monolayer-bilayer surface phase transition is observed, the first of its kind for surface-frozen layers. A continuous decrease of the molecular tilt with increasing diol concentration is also found for the tilted bilayer phases.

Original language	English
Pages (from-to)	55-61
Number of pages	7
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	164
Issue number	1
DOIs	https://doi.org/10.1016/s0927-7757(99)00392-1
State	Published - 30 Apr 2000
Event	The 15th European Chemistry at Interfaces Conference - Jerusalem, Isr Duration: 18 Oct 1998 → 22 Oct 1998

Bibliographical note

Funding Information:
The financial support of the work at Bar-Ilan University by Exxon Research and Engineering Co. is gratefully acknowledged, as is the beamtime allocation at beamline X22B, NSLS, BNL. Brookhaven National Laboratory is supported by the division of Materials Research, DOE, under contract DEAC02-98CH10886.

Funding

The financial support of the work at Bar-Ilan University by Exxon Research and Engineering Co. is gratefully acknowledged, as is the beamtime allocation at beamline X22B, NSLS, BNL. Brookhaven National Laboratory is supported by the division of Materials Research, DOE, under contract DEAC02-98CH10886.

Funders	Funder number
U.S. Department of Energy	DEAC02-98CH10886

Keywords

Bulk additives
Monolayer-bilayer surface phase transition
Pure alcohol melts
Surface freezing

Access to Document

10.1016/s0927-7757(99)00392-1

Cite this

@article{0e7a9131708248128053cdb61485f129,

title = "Surface structure tuning in alcohol melts by bulk additives",

abstract = "Surface freezing, i.e. the formation of a solid bilayer at the surface of a pure alcohol melt above the freezing temperature, was recently discovered. We demonstrate here that the structure of the bilayer can be influenced by specific bulk additives. Two different additives, able to form hydrogen bonds (water) and both hydrogen bonds and van der Waals interactions (α,ω-diols), are used. The surface layer's structure is studied by surface-specific X-ray methods. We find that water swells the bilayer by intercalation into its center at a molecular water:alcohol ratio of approx. 1:2. For the diolated alcohols a reversible monolayer-bilayer surface phase transition is observed, the first of its kind for surface-frozen layers. A continuous decrease of the molecular tilt with increasing diol concentration is also found for the tilted bilayer phases.",

keywords = "Bulk additives, Monolayer-bilayer surface phase transition, Pure alcohol melts, Surface freezing",

author = "O. Gang and Ocko, {B. M.} and Wu, {X. Z.} and Sirota, {E. B.} and M. Deutsch",

note = "Funding Information: The financial support of the work at Bar-Ilan University by Exxon Research and Engineering Co. is gratefully acknowledged, as is the beamtime allocation at beamline X22B, NSLS, BNL. Brookhaven National Laboratory is supported by the division of Materials Research, DOE, under contract DEAC02-98CH10886.; The 15th European Chemistry at Interfaces Conference ; Conference date: 18-10-1998 Through 22-10-1998",

year = "2000",

month = apr,

day = "30",

doi = "10.1016/s0927-7757(99)00392-1",

language = "אנגלית",

volume = "164",

pages = "55--61",

journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",

issn = "0927-7757",

publisher = "Elsevier",

number = "1",

}

TY - JOUR

T1 - Surface structure tuning in alcohol melts by bulk additives

AU - Gang, O.

AU - Ocko, B. M.

AU - Wu, X. Z.

AU - Sirota, E. B.

AU - Deutsch, M.

N1 - Funding Information: The financial support of the work at Bar-Ilan University by Exxon Research and Engineering Co. is gratefully acknowledged, as is the beamtime allocation at beamline X22B, NSLS, BNL. Brookhaven National Laboratory is supported by the division of Materials Research, DOE, under contract DEAC02-98CH10886.

PY - 2000/4/30

Y1 - 2000/4/30

N2 - Surface freezing, i.e. the formation of a solid bilayer at the surface of a pure alcohol melt above the freezing temperature, was recently discovered. We demonstrate here that the structure of the bilayer can be influenced by specific bulk additives. Two different additives, able to form hydrogen bonds (water) and both hydrogen bonds and van der Waals interactions (α,ω-diols), are used. The surface layer's structure is studied by surface-specific X-ray methods. We find that water swells the bilayer by intercalation into its center at a molecular water:alcohol ratio of approx. 1:2. For the diolated alcohols a reversible monolayer-bilayer surface phase transition is observed, the first of its kind for surface-frozen layers. A continuous decrease of the molecular tilt with increasing diol concentration is also found for the tilted bilayer phases.

AB - Surface freezing, i.e. the formation of a solid bilayer at the surface of a pure alcohol melt above the freezing temperature, was recently discovered. We demonstrate here that the structure of the bilayer can be influenced by specific bulk additives. Two different additives, able to form hydrogen bonds (water) and both hydrogen bonds and van der Waals interactions (α,ω-diols), are used. The surface layer's structure is studied by surface-specific X-ray methods. We find that water swells the bilayer by intercalation into its center at a molecular water:alcohol ratio of approx. 1:2. For the diolated alcohols a reversible monolayer-bilayer surface phase transition is observed, the first of its kind for surface-frozen layers. A continuous decrease of the molecular tilt with increasing diol concentration is also found for the tilted bilayer phases.

KW - Bulk additives

KW - Monolayer-bilayer surface phase transition

KW - Pure alcohol melts

KW - Surface freezing

UR - http://www.scopus.com/inward/record.url?scp=0343938537&partnerID=8YFLogxK

U2 - 10.1016/s0927-7757(99)00392-1

DO - 10.1016/s0927-7757(99)00392-1

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.conferencearticle???

AN - SCOPUS:0343938537

SN - 0927-7757

VL - 164

SP - 55

EP - 61

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

IS - 1

T2 - The 15th European Chemistry at Interfaces Conference

Y2 - 18 October 1998 through 22 October 1998

ER -

Surface structure tuning in alcohol melts by bulk additives

Abstract

Bibliographical note

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Cite this