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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

(a,c)  intensity distribution maps of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW, respectively; (b,d) heat source density maps of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW, respectively. The wavelength of the incident light is fixed under 980 nm.
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ijms-16-12547-f005: (a,c) intensity distribution maps of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW, respectively; (b,d) heat source density maps of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW, respectively. The wavelength of the incident light is fixed under 980 nm.

Mentions: Based on the FDTD method and the Joule effect [45], we discuss the heat generation of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW under illumination. Based on the FDTD method, theintensity distribution has been simulated. Moreover, theintensity distribution maps of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW are shown in Figure 5a,c, respectively, in which the wavelength of the incident light is fixed under 980 nm. From Figure 5a, we can find that a more intensive electric field intensity is located in the adjacent regions between two nanospheres, providing electric field hotspots, especially in the interparticle region. This finding demonstrates that the adjacent interaction of the Au-Bi2Te3 nanocomposites can substantially enhance the electric field in the adjacent region. As shown in Figure 5c, the intensive electric field distributed on the surface of the Au-Bi2Te3 nanocomposites, which covered the surface of the ridges of the HSAQS, and is distributed in between two ridges of the HSAQS. These findings demonstrate that the periodic triangular roof-type ridges form the periodic antireflection structure, which focuses light into the scale interior, and that the HSAQS can trap light effectively [40]. In addition, the Au-Bi2Te3 nanocomposites and the adjacent interaction of the Au-Bi2Te3 nanocomposites integrated with the HSAQS can further enhance the light absorption. When a plasmonic structure is under illumination, the heat source density arises from the Joule effect, and that the heat source density can be expressed as a function of the electric field [45]:(2)h(r→)=ωε0Im(εω)/E(r→)/2where ω is the angular frequency of the light, is the permittivity of the material, andis the electric field. Based on theintensity distribution (Figure 5a,c) obtained by FDTD simulation, we study the heat source density distribution of the Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW, respectively (Figure 5b,d). As shown in Figure 5b, the heat arises mainly from the photothermal material (Au NPs and Bi2Te3 NPs). In addition, more intensive heat source density distributes on the adjacent region between two plasmonic structures. This finding demonstrates that the coherent coupling between adjacent resonant systems enhance hot power yield. As shown in Figure 5d, the heat arises from the photothermal material (Au NPs and Bi2Te3 NPs), which covers the surface of the HSAQS of the T_FW. Additionally, we can find that the most of hot power yields of the Au-Bi2Te3_T_FW arise from the photothermal materials covering the surface of the ridges of the T_FW. Because the heat source density on the surface of the ridges of the T_FW are more intensive compared with the intensity of heat source density on the surface of the windows of the T_FW. In addition, the intensity of the heat source density on the surface of the windows of the T_FW decreased with the increased the depth of the window, as shown in the inset of Figure 5d. These findings demonstrate that the heat source density distribution of the Au-Bi2Te3_T_FW under illumination, is clearly nonuniform. Under illumination, the nonuniformity of the heat source density distribution of the TE film (Au-Bi2Te3_T_FW) will be beneficial to generate electrical power. Consequently, the Au-Bi2Te3_T_FW can potentially be used to generate electrical power from the solar thermal energy or micro region themoelectric energy production illuminated by infrared, due to the nonuniformity of the heat source density distribution of the TE film.


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)

(a,c)  intensity distribution maps of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW, respectively; (b,d) heat source density maps of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW, respectively. The wavelength of the incident light is fixed under 980 nm.
© Copyright Policy
Related In: Results  -  Collection

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

ijms-16-12547-f005: (a,c) intensity distribution maps of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW, respectively; (b,d) heat source density maps of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW, respectively. The wavelength of the incident light is fixed under 980 nm.
Mentions: Based on the FDTD method and the Joule effect [45], we discuss the heat generation of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW under illumination. Based on the FDTD method, theintensity distribution has been simulated. Moreover, theintensity distribution maps of Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW are shown in Figure 5a,c, respectively, in which the wavelength of the incident light is fixed under 980 nm. From Figure 5a, we can find that a more intensive electric field intensity is located in the adjacent regions between two nanospheres, providing electric field hotspots, especially in the interparticle region. This finding demonstrates that the adjacent interaction of the Au-Bi2Te3 nanocomposites can substantially enhance the electric field in the adjacent region. As shown in Figure 5c, the intensive electric field distributed on the surface of the Au-Bi2Te3 nanocomposites, which covered the surface of the ridges of the HSAQS, and is distributed in between two ridges of the HSAQS. These findings demonstrate that the periodic triangular roof-type ridges form the periodic antireflection structure, which focuses light into the scale interior, and that the HSAQS can trap light effectively [40]. In addition, the Au-Bi2Te3 nanocomposites and the adjacent interaction of the Au-Bi2Te3 nanocomposites integrated with the HSAQS can further enhance the light absorption. When a plasmonic structure is under illumination, the heat source density arises from the Joule effect, and that the heat source density can be expressed as a function of the electric field [45]:(2)h(r→)=ωε0Im(εω)/E(r→)/2where ω is the angular frequency of the light, is the permittivity of the material, andis the electric field. Based on theintensity distribution (Figure 5a,c) obtained by FDTD simulation, we study the heat source density distribution of the Au-Bi2Te3_Chitin and Au-Bi2Te3_T_FW, respectively (Figure 5b,d). As shown in Figure 5b, the heat arises mainly from the photothermal material (Au NPs and Bi2Te3 NPs). In addition, more intensive heat source density distributes on the adjacent region between two plasmonic structures. This finding demonstrates that the coherent coupling between adjacent resonant systems enhance hot power yield. As shown in Figure 5d, the heat arises from the photothermal material (Au NPs and Bi2Te3 NPs), which covers the surface of the HSAQS of the T_FW. Additionally, we can find that the most of hot power yields of the Au-Bi2Te3_T_FW arise from the photothermal materials covering the surface of the ridges of the T_FW. Because the heat source density on the surface of the ridges of the T_FW are more intensive compared with the intensity of heat source density on the surface of the windows of the T_FW. In addition, the intensity of the heat source density on the surface of the windows of the T_FW decreased with the increased the depth of the window, as shown in the inset of Figure 5d. These findings demonstrate that the heat source density distribution of the Au-Bi2Te3_T_FW under illumination, is clearly nonuniform. Under illumination, the nonuniformity of the heat source density distribution of the TE film (Au-Bi2Te3_T_FW) will be beneficial to generate electrical power. Consequently, the Au-Bi2Te3_T_FW can potentially be used to generate electrical power from the solar thermal energy or micro region themoelectric energy production illuminated by infrared, due to the nonuniformity of the heat source density distribution of the TE film.

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