Journal
NANO ENERGY
Volume 32, Issue -, Pages 195-200Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2016.12.031
Keywords
Absorption; Spectrum selective; Plasmonic; Self-assembly; Tunable bandwidth
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Funding
- State Key Program for Basic Research of China [2015CB659300, 2012CB921501, 2013CB632703]
- National Natural Science Foundation of China [11321063, 11574143, 11204139, 11174137, 91221206, 11274160, 51271092]
- Natural Science Foundation of Jiangsu Province [BK20150056, BK20151079, BK20130555]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Qing Lan Project of Jiangsu Province and the Fundamental Research Funds for the Central Universities
- Scientific Research Foundation of Graduate School of Nanjing University [2015CL01]
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Plasmonic nanostructures enable manipulation of light ranging from ultraviolet, visible to infrared regime based on steering on a variety of optical resonances. For various applications such as biomedical sensing, photodetectors and solar energy conversion, it is desirable to fabricate plasmonic absorbers with finely tuned bandwidth. In this work, for the first time, we report that spectrum-selective plasmonic absorbers with flexibly tuned bandwidth can be fabricated by a convenient self-assembly process. The plasmonic absorbers demonstrate an extraordinary absorption (above 90%) with absorption cutoff wavelengths flexibly tuned from visible (similar to 550 nm) to infrared (similar to 2500 nm). The pronounced absorption can be ascribed to plasmon hybridization of the close-packed gold nanoparticles, while optical cutoff effect of the gold-particle-assembly built nanotube leads to the tunable absorption edge. These tunable plasmonic absorbers also demonstrate excellent high temperature stability (up to 1073 K) with a thin alumina protection coating and applications for solar steam generation. Therefore, the plasmonic absorbers with tunable absorption bandwidth and thermal stability can serve as promising candidates for various solar energy conversion applications, such as solar steam generation, photocatalysis, etc.
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