Atomic-level molybdenum oxide nanorings with full-spectrum absorption and photoresponsive properties

Yong Yang, Yang Yang, Shuangming Chen, Qichen Lu, Li Song, Yen Wei and Xun Wang ()
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Yong Yang: Tsinghua University
Yang Yang: Tsinghua University
Shuangming Chen: University of Science and Technology of China
Qichen Lu: Tsinghua University
Xun Wang: Tsinghua University

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract Superthin nanostructures, particularly with atomic-level thicknesses, typically display unique optical properties because of their exceptional light–matter interactions. Here, we report a facile strategy for the synthesis of sulfur-doped molybdenum oxide nanorings with an atomic-level size (thickness of 0.5 nm) and a tunable ring-in-ring architecture. These atomic-level nanorings displayed strong photo-absorption in both the visible and infrared-light ranges and acted as a photothermal agent. Under irradiation with an 808 nm laser with an intensity of 1 W/cm2, a composite of the nanorings embedded in polydimethylsiloxane showed an ultrafast photothermal effect, delivering a local temperature of up to 400 °C within 20 s, which to the best of our knowledge is the highest temperature by light irradiation reported to date. Meanwhile, the resulting nanorings were also employed as a photoinitiator to remotely induce a visible-light shape memory response, self-healing, reshaping performance and reversible actuation of dynamic three-dimensional structures. This study demonstrates an advancement towards controlling atomic-level-sized nanostructures and achieving greatly enhanced optical performances for optoelectronics.

Date: 2017
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DOI: 10.1038/s41467-017-00850-8

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