Photoinduced variable stiffness of spiropyran-based composites

E. Samoylova; L. Ceseracciu; M. Allione; A. Diaspro; A. C. Barone; A. Athanassiou

doi:10.1063/1.3662401

Photoinduced variable stiffness of spiropyran-based composites

E. Samoylova^*, L. Ceseracciu, M. Allione, A. Diaspro, A. C. Barone, A. Athanassiou

^*Corresponding author for this work

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

8 Scopus citations

Abstract

A quantitative demonstration of reversible stiffness upon appropriate light stimulus in a spiropyran-polymeric composite is presented. The polymeric films containing 3 wt. of the photochromic spiropyran were irradiated with alternating ultraviolet and visible light and the storage modulus was measured. A reversible change in modulus of about 7 was observed. The modulus change was attributed to an interaction of the polar merocyanine with the polymeric chains and/or to a variation of effective free volume induced by merocyanine aggregates formed in the polymer upon ultraviolet irradiation. The effect is fully reversed when the merocyanine isomers turn back to the spiropyran state after visible irradiation.

Original language	English (US)
Article number	201905
Journal	Applied Physics Letters
Volume	99
Issue number	20
DOIs	https://doi.org/10.1063/1.3662401
State	Published - Nov 14 2011
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3662401

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title = "Photoinduced variable stiffness of spiropyran-based composites",

abstract = "A quantitative demonstration of reversible stiffness upon appropriate light stimulus in a spiropyran-polymeric composite is presented. The polymeric films containing 3 wt. of the photochromic spiropyran were irradiated with alternating ultraviolet and visible light and the storage modulus was measured. A reversible change in modulus of about 7 was observed. The modulus change was attributed to an interaction of the polar merocyanine with the polymeric chains and/or to a variation of effective free volume induced by merocyanine aggregates formed in the polymer upon ultraviolet irradiation. The effect is fully reversed when the merocyanine isomers turn back to the spiropyran state after visible irradiation.",

author = "E. Samoylova and L. Ceseracciu and M. Allione and A. Diaspro and Barone, {A. C.} and A. Athanassiou",

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language = "English (US)",

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T1 - Photoinduced variable stiffness of spiropyran-based composites

AU - Samoylova, E.

AU - Ceseracciu, L.

AU - Allione, M.

AU - Diaspro, A.

AU - Barone, A. C.

AU - Athanassiou, A.

PY - 2011/11/14

Y1 - 2011/11/14

N2 - A quantitative demonstration of reversible stiffness upon appropriate light stimulus in a spiropyran-polymeric composite is presented. The polymeric films containing 3 wt. of the photochromic spiropyran were irradiated with alternating ultraviolet and visible light and the storage modulus was measured. A reversible change in modulus of about 7 was observed. The modulus change was attributed to an interaction of the polar merocyanine with the polymeric chains and/or to a variation of effective free volume induced by merocyanine aggregates formed in the polymer upon ultraviolet irradiation. The effect is fully reversed when the merocyanine isomers turn back to the spiropyran state after visible irradiation.

AB - A quantitative demonstration of reversible stiffness upon appropriate light stimulus in a spiropyran-polymeric composite is presented. The polymeric films containing 3 wt. of the photochromic spiropyran were irradiated with alternating ultraviolet and visible light and the storage modulus was measured. A reversible change in modulus of about 7 was observed. The modulus change was attributed to an interaction of the polar merocyanine with the polymeric chains and/or to a variation of effective free volume induced by merocyanine aggregates formed in the polymer upon ultraviolet irradiation. The effect is fully reversed when the merocyanine isomers turn back to the spiropyran state after visible irradiation.

UR - http://www.scopus.com/inward/record.url?scp=81855169587&partnerID=8YFLogxK

U2 - 10.1063/1.3662401

DO - 10.1063/1.3662401

M3 - Article

AN - SCOPUS:81855169587

SN - 0003-6951

VL - 99

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 20

M1 - 201905

ER -

Photoinduced variable stiffness of spiropyran-based composites

Abstract

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