Controlling water evaporation through self-assembly

Research output: Contribution to journalArticle

Standard

Controlling water evaporation through self-assembly. / Roger, Kevin; Liebi, Marianne; Heimdal, Jimmy; Pham, Quoc Dat; Sparr, Emma.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 113, No. 37, 13.09.2016, p. 10275-10280.

Research output: Contribution to journalArticle

Harvard

APA

CBE

MLA

Vancouver

Author

RIS

TY - JOUR

T1 - Controlling water evaporation through self-assembly

AU - Roger, Kevin

AU - Liebi, Marianne

AU - Heimdal, Jimmy

AU - Pham, Quoc Dat

AU - Sparr, Emma

PY - 2016/9/13

Y1 - 2016/9/13

N2 - Water evaporation concerns all land-living organisms, as ambient air is dryer than their corresponding equilibrium humidity. Contrarily to plants, mammals are covered with a skin that not only hinders evaporation but also maintains its rate at a nearly constant value, independently of air humidity. Here, we show that simple amphiphiles/water systems reproduce this behavior, which suggests a common underlying mechanism originating from responding self-assembly structures. The composition and structure gradients arising from the evaporation process were characterized using optical microscopy, infrared microscopy, and smallangle X-ray scattering. We observed a thin and dry outer phase that responds to changes in air humidity by increasing its thickness as the air becomes dryer, which decreases its permeability to water, thus counterbalancing the increase in the evaporation driving force. This thin and dry outer phase therefore shields the systems from humidity variations. Such a feedback loop achieves a homeostatic regulation of water evaporation.

AB - Water evaporation concerns all land-living organisms, as ambient air is dryer than their corresponding equilibrium humidity. Contrarily to plants, mammals are covered with a skin that not only hinders evaporation but also maintains its rate at a nearly constant value, independently of air humidity. Here, we show that simple amphiphiles/water systems reproduce this behavior, which suggests a common underlying mechanism originating from responding self-assembly structures. The composition and structure gradients arising from the evaporation process were characterized using optical microscopy, infrared microscopy, and smallangle X-ray scattering. We observed a thin and dry outer phase that responds to changes in air humidity by increasing its thickness as the air becomes dryer, which decreases its permeability to water, thus counterbalancing the increase in the evaporation driving force. This thin and dry outer phase therefore shields the systems from humidity variations. Such a feedback loop achieves a homeostatic regulation of water evaporation.

KW - Cnrs, institut national polytechnique de toulouse, université Paul sabatier

KW - Evaporation

KW - Gradient

KW - Homeostatic

KW - Laboratoire de génie chimique

KW - Regulation

KW - Self-assembly

KW - Université de toulouse

UR - http://www.scopus.com/inward/record.url?scp=84987657365&partnerID=8YFLogxK

U2 - 10.1073/pnas.1604134113

DO - 10.1073/pnas.1604134113

M3 - Article

VL - 113

SP - 10275

EP - 10280

JO - Proceedings of the National Academy of Sciences

JF - Proceedings of the National Academy of Sciences

SN - 1091-6490

IS - 37

ER -