Epidermal photonic devices for quantitative imaging of temperature and thermal transport characteristics of the skin

Li Gao, Yihui Zhang, Viktor Malyarchuk, Lin Jia, Kyung In Jang, R. Chad Webb, Haoran Fu, Yan Shi, Guoyan Zhou, Luke Shi, Deesha Shah, Xian Huang, Baoxing Xu, Cunjiang Yu, Yonggang Huang, John A. Rogers*

*Corresponding author for this work

Research output: Contribution to journalArticle

130 Scopus citations

Abstract

characterization of temperature and thermal transport properties of the skin can yield important information of relevance to both clinical medicine and basic research in skin physiology. Here we introduce an ultrathin,compliant skin-like,or € epidermal € photonic device that combines colorimetric temperature indicators with wireless stretchable electronics for thermal measurements when softly laminated on the skin surface. The sensors exploit thermochromic liquid crystals patterned into large-scale, pixelated arrays on thin elastomeric substrates; the electronics provide means for controlled, local heating by radio frequency signals. Algorithms for extracting patterns of colour recorded from these devices with a digital camera and computational tools for relating the results to underlying thermal processes near the skin surface lend quantitative value to the resulting data. Application examples include non-invasive spatial mapping of skin temperature with milli-Kelvin precision (±50 €‰mK) and sub-millimetre spatial resolution. Demonstrations in reactive hyperaemia assessments of blood flow and hydration analysis establish relevance to cardiovascular health and skin care, respectively

Original languageEnglish (US)
Article number4938
JournalNature communications
Volume5
DOIs
StatePublished - 2014

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ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Gao, L., Zhang, Y., Malyarchuk, V., Jia, L., Jang, K. I., Chad Webb, R., Fu, H., Shi, Y., Zhou, G., Shi, L., Shah, D., Huang, X., Xu, B., Yu, C., Huang, Y., & Rogers, J. A. (2014). Epidermal photonic devices for quantitative imaging of temperature and thermal transport characteristics of the skin. Nature communications, 5, [4938]. https://doi.org/10.1038/ncomms5938