Solid-state high-power photo heat output of 4-((3,5-Dimethoxyaniline (cas 10272-07-8))-diazenyl)-2- imidazole/graphene film for thermally controllable dual data encoding/reading

Add time:07/26/2019    Source:sciencedirect.com

Solid-state high-power heat output at a relatively low temperature is a core problem for photo thermal batteries (PTB) films because of the fundamental contradiction between fast heat release and low-rate isomerization. To overcome this problem, imidazole-containing azoheteroarene (i-Azo-h) is introduced into a graphene-templated assembly for low-temperature time-resolved heat release. Intramolecular pull-push electronic interaction of i-Azo-h in the assembly film results in high-rate and high-degree trans-cis isomerization compared with azobenzene. The uniform i-Azo-h/graphene PTB film reaches very high power density (2380 W kg−1) and high energy density (105 Wh kg−1). A “tortoise”-like integrated system is designed as a high-power photo-heat source to realize a reversible and controllable temperature rise up to 3.3–4.1 °C on the “back” with a temperature gradient of the “leg.” Results show that heat release rate at 60 °C and under room-temperature green-light irradiation at 535 nm are higher than those at 45 °C, indicating controllability in time-resolved temperature rise. Based on these results, a thermally controllable dual encoding/reading strategy based on reversible time-resolved thermochromic-patterned display is developed for the first time. Dual encoding/reading information (response time or a specific pattern) can be selectively changed by optimizing isomerization degree or stimulus.

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