Time−Temperature Integrator Based on the Dewetting of Polyisobutylene Thin Films

Annalisa Calò, Pablo Stoliar, Francesco Cino Matacotta, Massimiliano Cavallini and Fabio Biscarini

Langmuir 2010, 26(8), 5312–5315.


This work reports the application of a patterned thin film of polyisobutylene (PIB) irradiated with an electron beam as a time−temperature integrator, i.e., a device that is able to record the thermal history of a product. The device is fabricated by irradiation with an electron beam of regions of a PIB thin film to different doses of electrons. A different dewetting behavior occurs at these regions upon thermal exposure, depending on the dose. The experimental results are quantified by means of a model of dewetting based on nucleation and growth of holes in a strong slippage regime.