Optical Properties of a Core/Shell/Shell Shape Metal-Insulator-Metal Composite Nanoparticle for Solar Energy Absorption

2021 ◽  
Author(s):  
Caiyan Qin ◽  
◽  
Han Gong ◽  
Chunlei Sun ◽  
Xiaohu Wu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solar Energy ◽  
Energy Absorption ◽  
Shell Shape ◽  
Core Shell ◽  
Metal Composite ◽  
Metal Insulator ◽  
Metal Insulator Metal ◽  
Composite Nanoparticle

scholarly journals Chemical and optical properties of carbonaceous aerosols in Nanjing, eastern China: regionally transported biomass burning contribution

2019 ◽  
Vol 19 (17) ◽  
pp. 11213-11233 ◽  
Author(s):  
Xiaoyan Liu ◽  
Yan-Lin Zhang ◽  
Yiran Peng ◽  
Lulu Xu ◽  
Chunmao Zhu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Organic Carbon ◽  
Solar Energy ◽  
Energy Absorption ◽  
Biomass Burning ◽  
Eastern China ◽  
Water Soluble ◽  
Carbonaceous Aerosols ◽  
Southeastern China ◽  
Brown Carbon

Abstract. Biomass burning can significantly impact the chemical and optical properties of carbonaceous aerosols. Here, the biomass burning impacts were studied during wintertime in a megacity of Nanjing, eastern China. The high abundance of biomass burning tracers such as levoglucosan (lev), mannosan (man), galactosan (gal) and non-sea-salt potassium (nss-K+) was found during the studied period with the concentration ranges of 22.4–1476 ng m−3, 2.1–56.2 ng m−3, 1.4–32.2 ng m−3 and 0.2–3.8 µg m−3, respectively. The significant contribution of biomass burning to water-soluble organic carbon (WSOC; 22.3±9.9 %) and organic carbon (OC; 20.9±9.3 %) was observed in this study. Backward air mass origin analysis, potential emission sensitivity of elemental carbon (EC) and MODIS fire spot information indicated that the elevations of the carbonaceous aerosols were due to the transported biomass-burning aerosols from southeastern China. The characteristic mass ratio maps of lev∕man and lev∕nss-K+ suggested that the biomass fuels were mainly crop residuals. Furthermore, the strong correlation (p < 0.01) between biomass burning tracers (such as lev) and light absorption coefficient (babs) for water-soluble brown carbon (BrC) revealed that biomass burning emissions played a significant role in the light-absorption properties of carbonaceous aerosols. The solar energy absorption due to water-soluble brown carbon and EC was estimated by a calculation based on measured light-absorbing parameters and a simulation based on a radiative transfer model (RRTMG_SW). The solar energy absorption of water-soluble BrC in short wavelengths (300–400 nm) was 0.8±0.4 (0.2–2.3) W m−2 (figures in parentheses represent the variation range of each parameter) from the calculation and 1.2±0.5 (0.3–1.9) W m−2 from the RRTMG_SW model. The absorption capacity of water-soluble BrC accounted for about 20 %–30 % of the total absorption of EC aerosols. The solar energy absorption of water-soluble BrC due to biomass burning was estimated as 0.2±0.1 (0.0–0.9) W m−2, considering the biomass burning contribution to carbonaceous aerosols. Potential source contribution function model simulations showed that the solar energy absorption induced by water-soluble BrC and EC aerosols was mostly due to the regionally transported carbonaceous aerosols from source regions such as southeastern China. Our results illustrate the importance of the absorbing water-soluble brown carbon aerosols in trapping additional solar energy in the low-level atmosphere, heating the surface and inhibiting the energy from escaping the atmosphere.

scholarly journals Optical Properties of Plasma Dimer Nanoparticles for Solar Energy Absorption

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2722
Author(s):  
Chunlei Sun ◽  
Caiyan Qin ◽  
Han Zhai ◽  
Bin Zhang ◽  
Xiaohu Wu
Keyword(s):  
Optical Properties ◽  
Solar Energy ◽  
Energy Absorption ◽  
Visible Region ◽  
Thermal Conversion ◽  
Solar Thermal ◽  
Ag Nanoparticle ◽  
Absorption Bands ◽  
Resonance Band ◽  
Conversion Technology

Plasmonic nanofluids have excellent optical properties in solar energy absorption and have been widely studied in solar thermal conversion technology. The absorption of the visible region of solar energy by ordinary metal nanoparticles is usually limited to a narrow resonance band, so it is necessary to enhance the coupling effect of nanoparticles in the visible spectrum region to improve absorption efficiency. However, it is still a difficult task to improve solar energy absorption by adjusting the structure and performance of nanoparticles. In this paper, a plasma dimer Ag nanoparticle is proposed to excite localized surface plasmon resonance (LSPR). Compared with an ordinary Ag nanoparticle in the visible region, the plasmonic Ag dimer nanoparticle produces more absorption peaks and broader absorption bands, which can broaden solar energy absorption. By analyzing the electromagnetic field of the nanoparticle, the resonance mode of the plasma dimer is discussed. The effects of the geometric dimensions of the nanoparticle and the embedding of two spheres on the optical properties are studied. In addition, the effects of a trimer and its special structure on the optical properties are also analyzed. The results show that the proposed plasma dimer Ag nanoparticle has broad prospects for application in solar thermal conversion technology.

scholarly journals High Tunability of Size Dependent Optical Properties of ZnO@M@Au (M = SiO2, In2O3, TiO2) Core/Spacer/Shell Nanostructure

2019 ◽  
Vol 2 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Gashaw Beyene Kassahun
Keyword(s):  
Optical Properties ◽  
Quantum Dot ◽  
Spectral Region ◽  
Shell Shape ◽  
Core Shell ◽  
Gold Content ◽  
Core Size ◽  
Static Approximation ◽  
Size Dependent ◽  
High Tunability

This theoretical work presents a comparative study of high tunability size dependent optical properties of quantum dot/wire triple layered core shell nanostructure based on the quasi-static approximation of classical electrodynamics embedded in a fixed dielectrics function of host matrix. In this paper, local field enhancement factor (LFEF), refractive index and optical absorbance of nanocomposite are analyzed by varying core size, thickness of spacer and shell as well as dielectrics function of the spacer for the size of the nanocomposite with the range of 20 nm to 40 nm. For both quantum dot and quantum wire triple layered core shell nanostructure (CSNS), there are two resonances in visible and near/in infrared spectral region with high tunability. When the shell thickness increase and therefore increasing the gold content, the surface plasmon resonance (SPR) at the outer interface shifts to higher energy (blue-shifted) and at the inner interface weak peaks and shifted to lower energy (red-shifted). All of three optical properties, depend on core size, dielectrics and thickess of spacer, thickness of shell, shape of composite and filling factor. For the same thickness of spacer and shell of the two configurations, cylindrical triple layered CSNS less pronounced and shifted to infrared red (IR) spectral region which is recommendable for biological and photocatalysis application.      

scholarly journals Designing a new optical biosensing platform based on an insulator-metal-insulatornanostructure

2021 ◽  
Vol 63 (6) ◽  
pp. 1-5
Author(s):  
Dinh Dat Pham ◽  
◽  
Tien Thanh Pham ◽  
Keyword(s):  
Optical Properties ◽  
Incident Light ◽  
Surrounding Medium ◽  
Attenuated Total Reflection ◽  
Free Electrons ◽  
Optical Biosensing ◽  
Metal Insulator ◽  
Visible Wavelength Range ◽  
Metal Insulator Metal ◽  
Calculation Results

The insulator-metal-insulator (IMI) structure is potential for the fabrication of biosensor platform devices because of its unique optical properties, especially surface plasmon resonance (SPR). In this study, the optical properties of the IMI structure in the visible wavelength range were calculated using the transfer matrix method. The results indicated that the IMI structure exhibited high absorbance at the proper wavelength due to the SPR. This phenomenon was resulted from the resonance of incident light and the free electrons in the metal surface. The SPR signal relied on the thickness of layers in the IMI structure and the refractive index of the surrounding medium. Based on calculation results, the IMI structure applied for the biosensor was designed and optimised with respects to optical properties. In addition, sensitivity calculation demonstrated that IMI structure was more sensitive than biosensor based on attenuated total reflection (ATR), SPR method while similar results were attained with the metal-insulator-metal (MIM) structure method.

scholarly journals Nonlinear Optical Properties of CdSe and CdTe Core-Shell Quantum Dots and Their Applications

2021 ◽  
Vol 9 ◽  
Author(s):  
Um e Kalsoom ◽  
Rongxing Yi ◽  
Junle Qu ◽  
Liwei Liu
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Light Emitting Diode ◽  
Nonlinear Refraction ◽  
Nonlinear Optical Properties ◽  
Shell Shape ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Core Shell

The strong nonlinear optical behavior of low-dimensional materials, such as quantum dots and core-shell quantum dots, has been a topic of intense research in recent years. As quantum dots have tunable emission via changes in their sizes, they are potentially useful in photo-electronics, photovoltaic nonlinear optics, light-emitting diode fabrication, and laser protections. Variation among core and shell shape and size, along with the chemical composition of quantum dots, define their enhanced nonlinear optical properties. Some specific nonlinear optical properties, such as nonlinear refraction, optical limiting, saturable absorption, reverse saturable absorption of CdTe and CdSe quantum dots (QDs), as well as core-shell QDs and their applications, were assessed in this paper.

Modeling, Fabrication, and Electrical Testing of Metal-Insulator-Metal Diode

2011 ◽  
Author(s):  
Terrance O'Regan ◽  
Matthew Chin ◽  
Cheng Tan ◽  
Anthony Birdwell
Keyword(s):  
Metal Insulator ◽  
Metal Insulator Metal
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