Galvanically Displaced Ultralong PbxSeyNiz Hollow Nanofibers with High Thermopower

Zhang, Miluo; Kim, Jiwon; Kim, Seil; Park, Hosik; Jung, Hyunsung; Ndifor-Angwafor, Nche George; Lim, Jae‐Hong; Choa, Yong‐Ho; Myung, Nosang V.

doi:10.1021/cm4041067

Cited by 8 publications

(13 citation statements)

References 35 publications

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“…In addition, the large disparity in the size of the larger fiber diameter may cause the larger error bars in the fiber diameters. The same phenomenon has been observed in previous work (Zhang et al, 2014 ). The wall thickness of the PbTe nanofibers were estimated assuming the inner diameters of hollow PbTe nanofibers were the same as the outer diameter of Co nanofibers.…”

Section: Resultssupporting

confidence: 91%

“…Large error bars were observed for all the conditions, which might be attributed to the inhomogeneity in the reactions due to the mass transfer limitation. The highest Pb content in the lead chalcogenide nanofibers (i.e., PbSe and PbTe) galvanically displaced from the sacrificial materials that have a similar redox potential ( i.e ., Ni and Co) (Zhang et al, 2014 ) was around 45 at.%. GDR of PbTe from Co has been studied by Chang et al ( 2014 ).…”

Section: Resultsmentioning

confidence: 99%

“…However, limited works are reported on the synthesis of metal chalcongenide nanofibers because of difficulty to prepare solutions. Therefore, synthesis of a few millimeter chalcogenide nanofibers has been realized by combining electrospinning with an additional process called the galvanic displacement reaction (Xiao et al, 2007b ; Chang et al, 2010a , b , 2014 ; Hangarter et al, 2010 ; Jung et al, 2010 , 2012 ; Park et al, 2010 , 2013 ; Rheem et al, 2010 ; Suh et al, 2012 , 2013 ; Elazem et al, 2013 ; Jeong et al, 2013 ; Liu et al, 2013 ; Wu et al, 2014 , 2015 ; Zhang et al, 2014 ), by which the electrospun nanofibers can be converted to desired hollow metal chalcogenides spontaneously. Several hollow nanofibers of chalcogens and metal chalcogenides [e.g., Te (Lee et al, 2011 ; Jeong et al, 2013 ), Ag 2 Te (Park et al, 2015 ; Zhang et al, 2015 ), and Pb x Se y Ni z (Zhang et al, 2014 )] have been successfully synthesized by this method in our group.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Thermoelectric Characterization of Lead Telluride Hollow Nanofibers

et al. 2018

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Lead telluride (PbTe) nanofibers were fabricated by galvanic displacement of electrospun cobalt nanofibers where their composition and morphology were altered by adjusting the electrolyte composition and diameter of sacrificial cobalt nanofibers. By employing Co instead of Ni as the sacrificial material, residue-free PbTe nanofibers were synthesized. The Pb content of the PbTe nanofibers was slightly affected by the Pb2+ concentration in the electrolyte, while the average outer diameter increased with Pb2+ concentration. The surface morphology of PbTe nanofibers was strongly dependent on the diameter of sacrificial nanofibers where it altered from smooth to rough surface as the Pb2+ concentration increased. Some of thermoelectric properties [i.e., thermopower (S) and electrical conductivity(σ)] were systematically measured as a function of temperature. Energy barrier height (Eb) was found to be one of the key factors affecting the thermoelectric properties–that is, higher energy barrier heights increased the Seebeck coefficient, but lowered the electrical conductivity.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and Thermoelectric Characterization of Lead Telluride Hollow Nanofibers

et al. 2018

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“…Reproduced with permission. [ 267 ] Copyright 2014, American Chemical Society. c) Schematic representations of the formation mechanism of DM‐CNT/PANI and CNT/PANI nanofibers: the enlarged part shows the highly ordered arrangement of the PANI backbone chains on the surface of the CNTs.…”

Section: Thermoelectric Electrospun Fibersmentioning

confidence: 99%

Thermoactive Smart Electrospun Nanofibers

Liguori

Pandini²,

Rinoldi

et al. 2022

Macromol. Rapid Commun.

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The recent burst of research on smart materials is a clear evidence of the growing interest of the scientific community, industry, and society in the field.The exploitation of the great potential of stimuli-responsive materials for sensing, actuation, logic, and control applications is favored and supported by new manufacturing technologies, such as electrospinning, that allows to endow smart materials with micro-and nanostructuration, thus opening up additional and unprecedented prospects. In this wide and lively scenario, this article systematically reviews the current advances in the development of thermoactive electrospun fibers and textiles, sorting them, according to their response to the thermal stimulus. Hence, several platforms including thermoresponsive systems, shape memory polymers, thermo-optically responsive systems, phase change materials, thermoelectric materials, and pyroelectric materials, are described and critically discussed. The difference in active species and outputs of the aforementioned categories is highlighted, evidencing the transversal nature of temperature stimulus. Moreover, the potential of novel thermoactive materials are pointed out, revealing how their development could take to utmost interesting achievements.

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“…For better understanding, four sheets of parallel Ag 2 Te NWs films on a paper substrate and three sheets of films with a clover-like shape were selected, as shown in Figure 3 c. The SEM images ( Figure 3 d,e) of the formed film reveal a porous structure of interlaced glass fiber sheet, and the substrate is hardly covered by the Ag 2 Te NWs. Different from the abovementioned method, another technique of synthesizing ultra-long Ag x Te y nanofibers was carried out via combining the electrospinning with galvanic displacement reaction (GDR), by putting electrospun Ni nanofibers [ 43 ] into TeO 2 , AgNO 3, and HNO 3 solution at room temperature. Thus, the branched and continuous Ag x Te y nanofibers facilitate the regulation of concentrated Ag + for electrolytes.…”

Section: Inorganic Synthetic Fibersmentioning

confidence: 99%

Inorganic Thermoelectric Fibers: A Review of Materials, Fabrication Methods, and Applications

Xin

Basit²,

Li³

et al. 2021

Sensors

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Thermoelectric technology can directly harvest the waste heat into electricity, which is a promising field of green and sustainable energy. In this aspect, flexible thermoelectrics (FTE) such as wearable fabrics, smart biosensing, and biomedical electronics offer a variety of applications. Since the nanofibers are one of the important constructions of FTE, inorganic thermoelectric fibers are focused on here due to their excellent thermoelectric performance and acceptable flexibility. Additionally, measurement and microstructure characterizations for various thermoelectric fibers (Bi-Sb-Te, Ag2Te, PbTe, SnSe and NaCo2O4) made by different fabrication methods, such as electrospinning, two-step anodization process, solution-phase deposition method, focused ion beam, and self-heated 3ω method, are detailed. This review further illustrates that some techniques, such as thermal drawing method, result in high performance of fiber-based thermoelectric properties, which can emerge in wearable devices and smart electronics in the near future.

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Galvanically Displaced Ultralong Pb_xSe_yNi_z Hollow Nanofibers with High Thermopower

Cited by 8 publications

References 35 publications

Synthesis and Thermoelectric Characterization of Lead Telluride Hollow Nanofibers

Synthesis and Thermoelectric Characterization of Lead Telluride Hollow Nanofibers

Thermoactive Smart Electrospun Nanofibers

Inorganic Thermoelectric Fibers: A Review of Materials, Fabrication Methods, and Applications

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