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Hydrothermal Synthesis Au-Bi2Te3 Nanocomposite Thermoelectric Film with a Hierarchical Sub-Micron Antireflection Quasi-Periodic Structure.

Tian J, Zhang W, Zhang Y, Xue R, Wang Y, Zhang Z, Zhang D - Int J Mol Sci (2015)

Bottom Line: In this work, Au-Bi(2)Te(3) nanocomposite thermoelectric film with a hierarchical sub-micron antireflection quasi-periodic structure was synthesized via a low-temperature chemical route using Troides helena (Linnaeus) forewing (T_FW) as the biomimetic template.This method combines chemosynthesis with biomimetic techniques, without the requirement of expensive equipment and energy intensive processes.The heterogeneity of heat source density distribution of the Au-Bi(2)Te(3) nanocomposite thermoelectric film opens up a novel promising technique for generating thermoelectric power under illumination.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China. tianjunlong666@sjtu.edu.cn.

ABSTRACT
In this work, Au-Bi(2)Te(3) nanocomposite thermoelectric film with a hierarchical sub-micron antireflection quasi-periodic structure was synthesized via a low-temperature chemical route using Troides helena (Linnaeus) forewing (T_FW) as the biomimetic template. This method combines chemosynthesis with biomimetic techniques, without the requirement of expensive equipment and energy intensive processes. The microstructure and the morphology of the Au-Bi(2)Te(3) nanocomposite thermoelectric film was analyzed by X-ray diffraction (XRD), field-emission scanning-electron microscopy (FESEM), and transmission electron microscopy (TEM). Coupled the plasmon resonances of the Au nanoparticles with the hierarchical sub-micron antireflection quasi-periodic structure, the Au-Bi(2)Te(3) nanocomposite thermoelectric film possesses an effective infrared absorption and infrared photothermal conversion performance. Based on the finite difference time domain method and the Joule effect, the heat generation and the heat source density distribution of the Au-Bi(2)Te(3) nanocomposite thermoelectric film were studied. The heterogeneity of heat source density distribution of the Au-Bi(2)Te(3) nanocomposite thermoelectric film opens up a novel promising technique for generating thermoelectric power under illumination.

No MeSH data available.


Related in: MedlinePlus

Models for FDTD simulation of (a) T_FW; (b) adding a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array to the surface of the chitin (Au-Bi2Te3_Chitin) and (c) adding a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array to the surface of the HSAQS of the T_FW (Au-Bi2Te3_T_FW); (d) FDTD calculations for the absorption spectra of Au-Bi2Te3_T_FW, Au-Bi2Te3_Chitin and T_FW.
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ijms-16-12547-f004: Models for FDTD simulation of (a) T_FW; (b) adding a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array to the surface of the chitin (Au-Bi2Te3_Chitin) and (c) adding a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array to the surface of the HSAQS of the T_FW (Au-Bi2Te3_T_FW); (d) FDTD calculations for the absorption spectra of Au-Bi2Te3_T_FW, Au-Bi2Te3_Chitin and T_FW.

Mentions: To further demonstrate that the Au-Bi2Te3_T_FW combined Au-Bi2Te3 nanocomposite with the HSAQS of the T_FW possesses an excellent light absorption performance over a wide spectral range, the finite difference time domain method (FDTD) simulation was used. Models for FDTD simulation of T_FW and dimensions of d1–d8 and θ were offered in our previous work, which are based on careful observation and statistical analysis of several SEM and TEM images of T_FW [40]. The diameter of the Au nanosphere and Bi2Te3 nanosphere are set to 20 nm. In order to use FDTD to simulate the Au-Bi2Te3_Chitin, a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array were added to the surface of the chitin structured the FDTD simulation model. The FDTD simulation model of Au-Bi2Te3_T_FW was constructed by adding a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array to the surface of the HSAQS of the T_FW. From the FDTD calculations (Figure 4d), we can find that Au-Bi2Te3_T_FW exhibits an enhancement in absorption over a broadband infrared region, compared with the absorption spectra of T_FW. However, compared with the absorption spectra of T_FW, the Au-Bi2Te3_T_FW exhibits a lower absorption over the visible and near infrared light region, as the melanin/chitin composite possessed an excellent absorption performance over the visible light region [29,42]. These findings indicate that the Au-Bi2Te3 nanocomposite array can enhance infrared absorption over a broadband. Additionally, compared with the absorption spectra of Au-Bi2Te3_Chitin, that of Au-Bi2Te3_T_FW exhibits a more intensive absorption over the wavelength range over 300–2500 nm. These results demonstrate that Au-Bi2Te3 nanocomposite, integrated with the HSAQS, can achieve an enhanced broadband light absorption. These results of FDTD calculations are in excellent agreement with those observed experimentally, as shown in Figure 3 and Figure 4d.


Hydrothermal Synthesis Au-Bi2Te3 Nanocomposite Thermoelectric Film with a Hierarchical Sub-Micron Antireflection Quasi-Periodic Structure.

Tian J, Zhang W, Zhang Y, Xue R, Wang Y, Zhang Z, Zhang D - Int J Mol Sci (2015)

Models for FDTD simulation of (a) T_FW; (b) adding a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array to the surface of the chitin (Au-Bi2Te3_Chitin) and (c) adding a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array to the surface of the HSAQS of the T_FW (Au-Bi2Te3_T_FW); (d) FDTD calculations for the absorption spectra of Au-Bi2Te3_T_FW, Au-Bi2Te3_Chitin and T_FW.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4490460&req=5

ijms-16-12547-f004: Models for FDTD simulation of (a) T_FW; (b) adding a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array to the surface of the chitin (Au-Bi2Te3_Chitin) and (c) adding a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array to the surface of the HSAQS of the T_FW (Au-Bi2Te3_T_FW); (d) FDTD calculations for the absorption spectra of Au-Bi2Te3_T_FW, Au-Bi2Te3_Chitin and T_FW.
Mentions: To further demonstrate that the Au-Bi2Te3_T_FW combined Au-Bi2Te3 nanocomposite with the HSAQS of the T_FW possesses an excellent light absorption performance over a wide spectral range, the finite difference time domain method (FDTD) simulation was used. Models for FDTD simulation of T_FW and dimensions of d1–d8 and θ were offered in our previous work, which are based on careful observation and statistical analysis of several SEM and TEM images of T_FW [40]. The diameter of the Au nanosphere and Bi2Te3 nanosphere are set to 20 nm. In order to use FDTD to simulate the Au-Bi2Te3_Chitin, a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array were added to the surface of the chitin structured the FDTD simulation model. The FDTD simulation model of Au-Bi2Te3_T_FW was constructed by adding a layer of Au nanosphere array and a layer of Bi2Te3 nanosphere array to the surface of the HSAQS of the T_FW. From the FDTD calculations (Figure 4d), we can find that Au-Bi2Te3_T_FW exhibits an enhancement in absorption over a broadband infrared region, compared with the absorption spectra of T_FW. However, compared with the absorption spectra of T_FW, the Au-Bi2Te3_T_FW exhibits a lower absorption over the visible and near infrared light region, as the melanin/chitin composite possessed an excellent absorption performance over the visible light region [29,42]. These findings indicate that the Au-Bi2Te3 nanocomposite array can enhance infrared absorption over a broadband. Additionally, compared with the absorption spectra of Au-Bi2Te3_Chitin, that of Au-Bi2Te3_T_FW exhibits a more intensive absorption over the wavelength range over 300–2500 nm. These results demonstrate that Au-Bi2Te3 nanocomposite, integrated with the HSAQS, can achieve an enhanced broadband light absorption. These results of FDTD calculations are in excellent agreement with those observed experimentally, as shown in Figure 3 and Figure 4d.

Bottom Line: In this work, Au-Bi(2)Te(3) nanocomposite thermoelectric film with a hierarchical sub-micron antireflection quasi-periodic structure was synthesized via a low-temperature chemical route using Troides helena (Linnaeus) forewing (T_FW) as the biomimetic template.This method combines chemosynthesis with biomimetic techniques, without the requirement of expensive equipment and energy intensive processes.The heterogeneity of heat source density distribution of the Au-Bi(2)Te(3) nanocomposite thermoelectric film opens up a novel promising technique for generating thermoelectric power under illumination.

View Article: PubMed Central - PubMed

Affiliation: State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China. tianjunlong666@sjtu.edu.cn.

ABSTRACT
In this work, Au-Bi(2)Te(3) nanocomposite thermoelectric film with a hierarchical sub-micron antireflection quasi-periodic structure was synthesized via a low-temperature chemical route using Troides helena (Linnaeus) forewing (T_FW) as the biomimetic template. This method combines chemosynthesis with biomimetic techniques, without the requirement of expensive equipment and energy intensive processes. The microstructure and the morphology of the Au-Bi(2)Te(3) nanocomposite thermoelectric film was analyzed by X-ray diffraction (XRD), field-emission scanning-electron microscopy (FESEM), and transmission electron microscopy (TEM). Coupled the plasmon resonances of the Au nanoparticles with the hierarchical sub-micron antireflection quasi-periodic structure, the Au-Bi(2)Te(3) nanocomposite thermoelectric film possesses an effective infrared absorption and infrared photothermal conversion performance. Based on the finite difference time domain method and the Joule effect, the heat generation and the heat source density distribution of the Au-Bi(2)Te(3) nanocomposite thermoelectric film were studied. The heterogeneity of heat source density distribution of the Au-Bi(2)Te(3) nanocomposite thermoelectric film opens up a novel promising technique for generating thermoelectric power under illumination.

No MeSH data available.


Related in: MedlinePlus