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Issue 19, 2012
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End-of-life indicators based on temperature switchable nanobombs

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Abstract

Nano-gas generators were synthesized by encapsulating azo-components into hydrophobic polymer particles. The dispersions of azo-components were subsequently thermally decomposed and could be reacted with either hydrophilic or hydrophobic dyes, which were located in the continuous and dispersed phases, respectively. Both systems displayed an irreversible switch in color upon temperature increase, yielding a new class of thermochromic materials. The mechanism and kinetics of the reaction between the azo-component and copper(II) phthalocyanine were monitored by EPR spectroscopy. The dispersions were also spin-coated on glass substrates and a significant change of turbidity occurred upon heating due to the gas generation in the films.

Graphical abstract: End-of-life indicators based on temperature switchable nanobombs

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Supplementary files

Article information


Submitted
17 Jan 2012
Accepted
07 Mar 2012
First published
13 Apr 2012

J. Mater. Chem., 2012,22, 9909-9920
Article type
Paper

End-of-life indicators based on temperature switchable nanobombs

A. Hamberger, A. Popa, R. M. Rossi, D. R. Kattnig, D. Hinderberger, K. Landfester and D. Crespy, J. Mater. Chem., 2012, 22, 9909
DOI: 10.1039/C2JM30333G

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