Telluride-based nanorods and nanosheets: synthesis, evolution and properties

Abstract

We report for the first time the synthesis of single crystalline In 2 Te 3 nanosheets. Te nanorods were first produced by controlling the reaction kinetics and then In 2 Te 3 nanosheets nucleated at the body of Te nanorods in the presence of organic surfactant. The self-assembly and the certain directional growth process of In 2 Te 3 on the body of Te nanorods resulted in an ordered nanostring-cluster which subsequently gave split In 2 Te 3 nanosheets. The transformation can be attributed to the developed facets and organic surfactants which can greatly enlarge the lateral dimensions and produce nanosheets. The morphology evolution from nanorods to nanosheets is demonstrated with experimental evidence collected via SEM, TEM and XRD studies. The synthesis of nanorods/nanosheets will supply additional opportunities for the exploration of novel fundamental properties of telluride based chalcogenides materials. Initial hydrogen storage results pave the way for utilizing telluride-based nanostructures for gas storage and gas sensing properties. Also, the photoresponse properties of indium telluride offers good knowledge for the fabrication of nanoscale electronic and optoelectronic devices.

Au@HgxCd1-xTe core@shell nanorods by sequential aqueous cation exchange for near-infrared photodetectors

“…[22][23][24][25] Telluride based NCs have attracted a great deal of attention for their potential applications in quantum devices, [26][27][28][29] sensing [30][31] and thermoelectric devices. [32][33] In particular, CdTe, HgTe as well as Hg x Cd 1-x Te NCs with narrow band gaps are considered as promising candidates for optoelectronic and particularly infrared photodetector materials. [13,[34][35][36][37][38] Compared to well-studied application of isotropic semiconductor QDs or NCs on optoelectronic devices, rod-like structure materials may exhibite extrodinary optical properties due to the polarized properties.…”

Low‐Dimensional Te‐Based Nanostructures

“…Anhydrous hydrazine can only induce the growth of pure Bi 2 Te 3 nanowires, but 0.4 mL hydrazine hydrate (N 2 H 4 ·H 2 O 80%) would lead to the growth of Bi 2 Te 3 nanoplates on the surface of the Te nanowires. Our group systematically researched the growth process of Te–In 2 Te 3 nanowire–nanosheet heterostructures synthesized by controlling reaction kinetics 25. From scanning electron microscopy (SEM) images ( Figure A), it is seen that the morphology of the product is strongly dependent on the temperature and reaction duration.…”

“…B) a,c,e) are the EDS, high‐resolution TEM image, and SAED pattern of the nanosheet in the In 2 Te 3 –Te heterostructure, respectively; b,d,f) are the corresponding images of the nanorod in the In 2 Te 3 –Te heterostructure. Reproduced with permission 25. Copyright 2012, Royal Society of Chemistry.…”

Colloidal lead iodide nanorings

“…In order to construct nanosheet-based devices, shape, size and composition control is essential. Various techniques like exfoliation of layered structures,16,17 solvothermal methods,18,19 chemical vapor deposition,20,21 and direct colloidal synthesis in a flask have proven to be effective 22,23. However, it is still challenging to prepare uniform and single crystalline sheets without any domain formation in the whole sheet.…”