Diameter and composition modulated bismuth telluride nanowires by galvanic displacement reaction of segmented NiFe nanowires

Electric Field-Assisted Additive Manufacturing Polyaniline Based Composites for Thermoelectric Energy Conversion

“…[22][23][24], In the previous work [22,23], Ni-Fe alloy was used as the raw material. But in this work, Ni and Co nanoparticles were used as the precursors to form core shell particles due to the better con trollability.…”

Bamboo-like Te Nanotubes with Tailored Dimensions Synthesized from Segmental NiFe Nanowires as Sacrificial Templates

“…Segmental NiFe nanowires with Ni-rich and Fe-rich components were prepared by electrodeposition method utilizing porous AAO membranes for use as a sacrificial material. 9,22 The length of each segment was controlled by varying the plating time. The plating electrolyte was composed of 0.9 M FeCl 2 , 0.6 M NiCl 2 , 1.0 M CaCl 2 , and 0.03 M L-ascorbic acid in deionized water with adjusted pH of 0.7.…”

“…Composition of the Ni-rich segment was Ni 70 Fe 30 and that of Fe-rich segment was Ni 21 Fe 79 , as was reported previously. 22 The nanowires were suspended by dissolving the templates. The dissolving solution for AAO was 1 M NaOH and that for polycarbonate was 99.5% 1-methyl-2-pyrrolidinone.…”

“…GDR is a spontaneous electrochemical reaction driven by the difference between the redox potentials of the sacrificial material and the ions in the electrolyte at nearly ambient conditions without the aid of an external power source. [7][8][9][10][18][19][20][21][22][23][24][25] Tellurium is a p-type semiconductor with a narrow band gap of 0.35 eV at room temperature. 1-D Te nanostructures have been found to exhibit excellent properties in electrical and optical devices such as room temperature gas sensors, thermoelectric devices, piezoelectric devices, and photo-conductors.…”

Synthesis and Thermoelectric Characterization of Lead Telluride Hollow Nanofibers

“…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.…”