Aqueous chemical synthesis of tellurium nanowires using a polymeric template for thermoelectric materials

One-Pot Hydrothermal Synthesis of Thin Tellurene Nanosheet and Its Formation Mechanism

“…Among them, the A 1 mode is attributed to the chain expansion mode due to each atom movement in the basal plane. And the other two E modes are separated into the predominately bond-bending E 1 -TO mode from the rotation of the a-axis and the bond-stretching E 2 mode from an asymmetric stretching mainly along the c-axis [11,17]. These sharp, broad Raman peaks of Te indicating synthesized productions are highly crystalline and pure in accordance with EDS and XRD results.…”

“…Te nanomaterials have a peculiar chiralchain crystal lattice structure and intriguing features such as superior carrier mobility [5][6][7], strong light absorption capacity [6,8], high ductility [9], and good environmental stability [1]. Various Te nanostructures have been successfully synthesized using ionic liquid microwave-assisted synthesis [10], vapor phase growth [11,12], solution phase synthesis [13][14][15][16], and surfactant-assisted growth [17,18]. A number of synthesis methods favor the 1D nanostructure due to its inherent structural anisotropy.…”

A p-type multi-wall carbon nanotube/Te nanorod composite with enhanced thermoelectric performance

“…34 Our XPS data is consistent with such results. 4 This implies that the Te nanorods were successfully synthesized by the chosen fabrication process, which was further conrmed by FE-SEM and EDS analyses, the details of which are provided in the following sections.…”

“…Nowadays, tellurium (Te) and its alloys are widely used as thermoelectric devices due to its outstanding Seebeck coefficient. [3][4][5][6] Te is a ptype semiconductor with a narrow band gap (a direct band gap of approximately 0.35 eV at room temperature 7 ) and a high Seebeck coefficient ($400 mV K À1 at room temperature 8,9 ). However, Te is not entirely suitable to achieve a high power factor because Te has a relatively low electrical conductivity ($10 S m À1 at room temperature 10 ).…”

Enhanced growth of tellurium nanowires under conditions of macromolecular crowding

“…These building-block particles (monomers) were produced under mild alkaline conditions via chemical reduction of the sodium tellurite precursor (Na 2 TeO 3 ) by the reducing agent hydrazine (N 2 H 4 ) or its protonated form hydrazinium cation (N 2 H 5 + ), which then turn into inert products in an irreversible process: 14,15 Te nanocrystals preferentially grow into one-dimensional nanowires (NWs) with unlimited length and narrow sizedistribution in diameter under well-controlled physical conditions. 16,17 Their crystalline form has a trigonal structure (t-Te), which consists of helical chains of covalently bound atoms, and is bundled together by weak secondary interactions. 18 The unique feature of the longitudinal growth tendency is a consequence of the crystal structure and selective surface stabilization implemented by various additives, which effectively constrain the pathways of crystal growth by preventing undesired polymorphism or aggregation as a result of steric stabilization of crystal facets.…”