The authors used cesium tungsten oxide as a near-infrared absorber that heats a hydroxypropyl cellulose hydrogel locally, switching it between clear and opaque to form a display. Carbon nanotubes were added to speed heating and cooling. Tungsten is a component of a device, not a measured exposure.
Key numbers
This paper reports no numerical findings relevant to tungsten exposure.
Methods (brief)
Composite hydrogels were prepared and their photothermal response under near-infrared laser irradiation and their optical switching times were measured.
Evidence fitness
Off-topic for dietary exposure: a display materials paper that does not support dietary exposure or toxicity claims for tungsten.
Limitations
No release, migration or biological measurements of tungsten.
Related evidence
Update history
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