Spontaneous Transformation of Stabilizer‐Depleted Binary Semiconductor Nanoparticles into Selenium and Tellurium Nanowires

Tang, Zhiyong; Wang, Ying; Sun, Kai; Kotov, Nicholas A.

doi:10.1002/adma.200400894

Cited by 142 publications

(182 citation statements)

References 53 publications

Supporting

Mentioning

165

Contrasting

Order By: Relevance

“…The distance between two neighboring lattice fringes in Figure 2B is about 0.58 nm, corresponding to the Te (006) crystal planes and suggesting the growth direction for Te nanowires is along c-axis, which is mainly due to the anisotropic crystal structure in hexagonal Te phase. 22,23 19,24 Notably, the concentration and the amount of hydrazine have been found to significantly impact the composition of the final product as well as the size and the density of the Te nanowires and Bi 2 Te 3 plates. Using anhydrous hydrazine in the reaction will only lead to the formation of pure Bi 2 Te 3 nanowires with a much thinner diameter, which is consistent with our previous report.…”

mentioning

confidence: 99%

Design Principle of Telluride-Based Nanowire Heterostructures for Potential Thermoelectric Applications

et al. 2012

View full text Add to dashboard Cite

We present a design principle to develop new categories of telluride-based thermoelectric nanowire heterostructures through rational solution-phase reactions. The catalyst-free synthesis yields Te−Bi 2 Te 3 "barbell" nanowire heterostructures with a narrow diameter and length distribution as well as a rough control over the density of the hexagonal Bi 2 Te 3 plates on the Te nanowire bodies, which can be further converted to other telluride-based compositionalmodulated nanowire heterostructures such as PbTe−Bi 2 Te 3 . Initial characterizations of the hot-pressed nanostructured bulk pellets of the Te−Bi 2 Te 3 heterostructure show a largely enhanced Seebeck coefficient and greatly reduced thermal conductivity, which lead to an improved thermoelectric figure of merit. This approach opens up new platforms to investigate the phonon scattering and energy filtering.

show abstract

mentioning

confidence: 99%

Design Principle of Telluride-Based Nanowire Heterostructures for Potential Thermoelectric Applications

et al. 2012

View full text Add to dashboard Cite

show abstract

“…26 Other methods for wet chemical synthesis of 1D tellurium nanostructures are also reported. [27][28][29] However, the vapor phase synthesis of Te nanotubes is not common. In a particular case, it results in the formation of tubular structures of Te with micrometer diameters.…”

Section: Introductionmentioning

confidence: 99%

“…This anisotropic structure induces Te toward 1D growth. 3,[21][22][23][24][25][26][27][28][29][30][31][32] Mayer and Xia reported the synthesis of Te nanotubes with hexagonal cross sections by reducing orthotelluric acid in ethylene glycol. 3 Wei et al synthesized Te nanotubes by a solvothermal process using N,N-dimethylformamide as a solvent and porous silica (MCM-41) as a growth assisting agent.…”

Section: Introductionmentioning

confidence: 99%

“…It has been considered to be an excellent candidate for use in future high-efficiency photoconductors, thermoelectric, and piezoelectric devices. 3,[21][22][23][24][25][26][27][28][29][30][31][32] Many functional materials can be easily synthesized by the reaction of tellurium with other elements. The crystal structure of Te is highly anisotropic with covalently bonded atoms forming unique helical chains.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Single Crystalline Tellurium Nanotubes with Triangular and Hexagonal Cross Sections

et al. 2005

View full text Add to dashboard Cite

Single crystalline tellurium (Te) nanotubes with triangular cross sections were successfully synthesized for the first time by a simple approach of vaporizing tellurium metal and condensing the vapor in an inert atmosphere onto a suitable substrate. Tellurium gas was evaporated by heating at 350°C and was condensed on the Si (100) substrate at 150-200°C, in the downstream of argon (Ar) gas at a flow rate of 25 sccm for 10 min. This led to the production of nanotubes of triangular cross section along with some hexagonal ones. The formation of the nanotubes was highly dependent upon the structure of the substrate surface, Ar gas flow rate, and the deposition temperature. When the substrate is Si (111) or sapphire (0001) or when the argon flow rate is increased to 500 sccm, nanowires and nanorods were exclusively formed. Irrespective of the morphologies, all the observed Te nanostructures grew in a regular [0001] direction. The facile approach to nanotubes with a triangular cross section may facilitate some new applications as well as stimulate theoretical studies pertaining to the stability of this high-energy configuration.

show abstract

“…Previous reports on the synthesis of Te and Se nanomaterials [29][30][31] did not relate to the chirality or chiroptical activity of the nanostructures, and there were no attempts to direct their handedness. Here, in addition to lattice chirality of nanocrystals, the overall shape of Te nanocrystals is made chiral, to achieve a new level of control over chirality.…”

mentioning

confidence: 99%

Enantioselective control of lattice and shape chirality in inorganic nanostructures using chiral biomolecules

et al. 2014

View full text Add to dashboard Cite

A large number of inorganic materials form crystals with chiral symmetry groups. Enantioselectively synthesizing nanostructures of such materials should lead to interesting optical activity effects. Here we report the synthesis of colloidal tellurium and selenium nanostructures using thiolated chiral biomolecules. The synthesis conditions are tuned to obtain tellurium nanostructures with chiral shapes and large optical activity. These nanostructures exhibit visible optical and chiroptical responses that shift with size and are successfully simulated by an electromagnetic model. The model shows that they behave as chiral optical resonators. The chiral tellurium nanostructures are transformed into chiral gold and silver telluride nanostructures with very large chiroptical activity, demonstrating a simple colloidal chemistry path to chiral plasmonic and semiconductor metamaterials. These materials are natural candidates for studies related to interactions of chiral (bio)molecules with chiral inorganic surfaces, with relevance to asymmetric catalysis, chiral crystallization and the evolution of homochirality in biomolecules.

show abstract

Spontaneous Transformation of Stabilizer‐Depleted Binary Semiconductor Nanoparticles into Selenium and Tellurium Nanowires

Cited by 142 publications

References 53 publications

Design Principle of Telluride-Based Nanowire Heterostructures for Potential Thermoelectric Applications

Design Principle of Telluride-Based Nanowire Heterostructures for Potential Thermoelectric Applications

Synthesis of Single Crystalline Tellurium Nanotubes with Triangular and Hexagonal Cross Sections

Enantioselective control of lattice and shape chirality in inorganic nanostructures using chiral biomolecules

Contact Info

Product

Resources

About