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Systems and methods using metal nanostructures in spectrally selective absorbers

A metal nanostructure, nanostructure technology, applied in nanotechnology, nanooptics, nanotechnology, etc., can solve problems such as increasing costs

Inactive Publication Date: 2016-08-24
达特茅斯学院托管理事会
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, most of the CPS receivers have to work under vacuum, which adds additional cost
In addition, vacuum breakage also becomes a major failure mechanism for CSP systems

Method used

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  • Systems and methods using metal nanostructures in spectrally selective absorbers
  • Systems and methods using metal nanostructures in spectrally selective absorbers
  • Systems and methods using metal nanostructures in spectrally selective absorbers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment I

[0100] Embodiment I: Ni nanochain-Al 2 o 3 Spectrum Selective Solar Thermal Absorber

[0101] This embodiment constitutes figure 2 A particular embodiment of the absorber 200 optimized for use as a spectrally selective solar thermal absorber, wherein the metal nanoparticles 240 are Ni nanoparticles and thus the nanochains 230 are Ni nanochains. The matrix 220 is composed of Al with embedded Ni nanochains 2 o 3 metal ceramics. The diameter of the Ni nanoparticles is about 100 nm, which is small enough not to be resolved by short-wavelength infrared photons and mid-infrared photons from thermal radiation. The fabrication method described in this example is Figure 4 An embodiment of the method 400. Matrix material Al2 o 3 It is selected for its ability to withstand high temperatures. In addition, Al 2 o 3 is an inexpensive material commonly used in many different systems and applications. Other suitable matrix materials include aluminum nitride, silicon oxide, and s...

Embodiment II

[0125] Example II: Synthesis of Ni Nanochains Composed of Hollow Ni Nanoparticles

[0126] This example shows Figure 4 An embodiment of step 410 to form hollow Ni nanoparticles and their chains, which respectively constitute figure 2 and image 3 Embodiments of nanoparticles 240 and nanochains 230.

[0127] Hollow Ni nanoparticles and nanochains are used for passing through Ni(DS) 2 Nickel dodecyl sulfate (Ni(DS) 2 ) and NaH 2 PO 2 The oxidation-reduction reaction forms nano-sized Ni spheres by hydrothermal method. Figure 10 A general method 1000 for forming hollow Ni nanoparticles is shown. Ni(DS) that will be marked as 1010 2 dissolved in water to form spherical micellar templates 1020, and in OH - Ni 2+ Ions and H 2 PO 2- react to form Ni atoms 1030 . Next, as shown by reference 1040 , the Ni atoms aggregate and gradually develop into Ni hollow nanoparticles 1050 . Oh - The presence of plays an important role in the formation of shell structures rather tha...

Embodiment III

[0130] Example III: Oxidation-resistant, metal-nanostructure-based spectrally selective solar thermal absorber

[0131] In this example, it is disclosed for image 3 The system 300, Figure 4 The method of , and optionally method 700 ( Figure 7 ), method 1000( Figure 10 ), and / or method 1100 ( Figure 11 ) A method of making a spectrally selective solar thermal absorber. In this particular embodiment, the nanostrands (eg, nanostrands 240) are protected from oxidation. This has important implications for CSP systems where the presently disclosed antioxidant spectrally selective solar thermal absorbers can be incorporated under ambient atmosphere as opposed to being kept under vacuum. Nanoparticles may consist of hollow and / or solid nanoparticles. In certain embodiments, nanochains comprise a plurality of nanoparticles in the range of 2-10,000 nanoparticles. absorber manufacturing

[0132] Figure 12 shown for the fabrication of Ni nanoparticles or Ni nanochains based...

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Abstract

Solution-processed Ni nanochain-SiOx (x<2) and Ni nanochain-SiO2 selective solar thermal absorbers that exhibit a strong anti-oxidation behavior up to 600 degrees centigrade in air. The thermal stability is far superior to Ni nanoparticle-Al2O3 selective solar thermal absorbers. The SiOx (x<2) and SiO2 matrices are derived from hydrogen silsesquioxane (HSQ) and tetraethyl orthosilicate (TEOS) precursors, respectively. We find that both the excess Si and the stoichiometric SiO2 matrix contribute to antioxidation behavior. Methods of making the selective solar thermal absorbers are described. A system, and method of manufacture of the system, for spectrally selective radiation absorption includes a matrix that includes metal nanostructures, each metal nanostructure having spectrally selective radiation absorption properties, such that the matrix reflects a majority of light incident thereupon for wavelengths greater than a cutoff wavelength and absorbs a majority of light incident thereupon for wavelengths smaller than the cutoff wavelength.

Description

[0001] Cross References to Related Applications [0002] This application claims co-pending U.S. Provisional Patent Application Serial No. 61 / 858,492, filed July 25, 2013, and co-pending U.S. Provisional Patent Application Serial No. 62 / 020,969, filed July 3, 2014 The priority and benefit of each of these applications is hereby incorporated by reference in its entirety. [0003] Statement Regarding Commonwealth Funded Research or Development [0004] This invention was made with government support under Award No. 1315245 awarded by the National Science Foundation's SBIR program. The Government has certain rights in this invention. [0005] The name of the group for the joint research agreement [0006] This invention arose from work under a joint research agreement between Norwich Technologies, a Delaware corporation, and Dartmouth College, a higher education nonprofit corporation duly organized under the laws of New Hampshire (103c). field of invention [0007] The presen...

Claims

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Application Information

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IPC IPC(8): G02B5/22
CPCB82Y20/00F24S23/00F24S70/225G02B5/008G02B5/22H01L31/0547Y02E10/44Y02E10/52
Inventor 刘继峰王晓欣于霄白
Owner 达特茅斯学院托管理事会
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