Solvent contrast variation study of w/o AOT microemulsions using small-angle neutron scattering

R. Kawai-Hirai; M. Hirai; H. Iwase; S. Arai; M. Imai; Y. Matsushita

doi:10.1016/S0921-4526(97)00774-6

Solvent contrast variation study of w/o AOT microemulsions using small-angle neutron scattering

R. Kawai-Hirai, M. Hirai, H. Iwase, S. Arai, M. Imai, Y. Matsushita

Research output: Contribution to journal › Article › peer-review

Abstract

Recently, we showed that the hydrolysis of some esters catalyzed by α-chymotrypsin entrapped in sodium bis(2-ethylhexyl)sulfosuccinate (AOT) microemulsions is enhanced at low water-surfactant molar ratio W₀ (= [H₂O]/[AOT]) and that the internal interface structure and the oligomeric phase of the AOT microemulsions below this W₀ range would play an important role for the acceleration of the metabolic turnover. To clarify the relation between the appearance of superactivity and the internal structures of the AOT microemulsions, we have carried out small-angle neutron-scattering experiments. In this report, we treat the AOT/water/hexane or heptane system by using solvent-contrast variation method, and we discuss a change of the excluded volume of AOT molecule at low W₀ value.

Original language	English
Pages (from-to)	984-986
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	241-243
DOIs	https://doi.org/10.1016/S0921-4526(97)00774-6
Publication status	Published - 1997 Jan 1
Externally published	Yes

Keywords

AOT
Contrast variation
Microemulsion
Neutron small-angle scattering

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/S0921-4526(97)00774-6

Cite this

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title = "Solvent contrast variation study of w/o AOT microemulsions using small-angle neutron scattering",

abstract = "Recently, we showed that the hydrolysis of some esters catalyzed by α-chymotrypsin entrapped in sodium bis(2-ethylhexyl)sulfosuccinate (AOT) microemulsions is enhanced at low water-surfactant molar ratio W0 (= [H2O]/[AOT]) and that the internal interface structure and the oligomeric phase of the AOT microemulsions below this W0 range would play an important role for the acceleration of the metabolic turnover. To clarify the relation between the appearance of superactivity and the internal structures of the AOT microemulsions, we have carried out small-angle neutron-scattering experiments. In this report, we treat the AOT/water/hexane or heptane system by using solvent-contrast variation method, and we discuss a change of the excluded volume of AOT molecule at low W0 value.",

keywords = "AOT, Contrast variation, Microemulsion, Neutron small-angle scattering",

author = "R. Kawai-Hirai and M. Hirai and H. Iwase and S. Arai and M. Imai and Y. Matsushita",

year = "1997",

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doi = "10.1016/S0921-4526(97)00774-6",

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journal = "Physica B: Condensed Matter",

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T1 - Solvent contrast variation study of w/o AOT microemulsions using small-angle neutron scattering

AU - Kawai-Hirai, R.

AU - Hirai, M.

AU - Iwase, H.

AU - Arai, S.

AU - Imai, M.

AU - Matsushita, Y.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - Recently, we showed that the hydrolysis of some esters catalyzed by α-chymotrypsin entrapped in sodium bis(2-ethylhexyl)sulfosuccinate (AOT) microemulsions is enhanced at low water-surfactant molar ratio W0 (= [H2O]/[AOT]) and that the internal interface structure and the oligomeric phase of the AOT microemulsions below this W0 range would play an important role for the acceleration of the metabolic turnover. To clarify the relation between the appearance of superactivity and the internal structures of the AOT microemulsions, we have carried out small-angle neutron-scattering experiments. In this report, we treat the AOT/water/hexane or heptane system by using solvent-contrast variation method, and we discuss a change of the excluded volume of AOT molecule at low W0 value.

AB - Recently, we showed that the hydrolysis of some esters catalyzed by α-chymotrypsin entrapped in sodium bis(2-ethylhexyl)sulfosuccinate (AOT) microemulsions is enhanced at low water-surfactant molar ratio W0 (= [H2O]/[AOT]) and that the internal interface structure and the oligomeric phase of the AOT microemulsions below this W0 range would play an important role for the acceleration of the metabolic turnover. To clarify the relation between the appearance of superactivity and the internal structures of the AOT microemulsions, we have carried out small-angle neutron-scattering experiments. In this report, we treat the AOT/water/hexane or heptane system by using solvent-contrast variation method, and we discuss a change of the excluded volume of AOT molecule at low W0 value.

KW - AOT

KW - Contrast variation

KW - Microemulsion

KW - Neutron small-angle scattering

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U2 - 10.1016/S0921-4526(97)00774-6

DO - 10.1016/S0921-4526(97)00774-6

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SN - 0921-4526

VL - 241-243

SP - 984

EP - 986

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

ER -

Solvent contrast variation study of w/o AOT microemulsions using small-angle neutron scattering

Abstract

Keywords

ASJC Scopus subject areas

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