Tellurium

Manufactured by Thermo Fisher Scientific

Tellurium is a metalloid element that is used in various laboratory equipment. It has a silvery-white appearance and is commonly used in the production of specialty alloys, electronic components, and optical devices. Tellurium's core function is to serve as a key component in certain types of laboratory equipment, but a detailed description of its intended use would require further research to maintain an unbiased and factual approach.

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Tellurium powder (7 citations)

6 protocols using tellurium

Fabrication of Bi-Sb-Te Thermoelectrics

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According to the nominal composition of Bi_0.4Sb_1.6Te₃₊_δ (δ = −0.03, −0.02, −0.01, 0, 0.01, 0.02, 0.03) are fabricated, raw materials, (bismuth (Bi, 99.99%; Alfa Aesar), antimony (Sb, 99.99%; Alfa Aesar), and tellurium (Te, 99.99%; Alfa Aesar)), were weighed and sealed into quartz tubes with the vacuum condition of 10⁻⁵ torr. Then, these tubes were heated up to 800 °C followed by furnace cooling after 10 h dwelling. 2 h of high‐energy ball milling on SPEX 8000M was used to crush the ingots into fine powders which were immediately condensed via spark plasma sintering (SPS) in an Φ12.7 mm graphite die at 400 °C with an axial pressure of 80 MPa for 5 min.

Qin H., Qu W., Zhang Y., Zhang Y., Liu Z., Zhang Q., Wu H., Cai W, & Sui J. (2022). Nanotwins Strengthening High Thermoelectric Performance Bismuth Antimony Telluride Alloys. Advanced Science, 9(14), 2200432.

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Platinum-Tellurium Catalyst Synthesis

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Platinum (99.98%), tellurium (99.999%) were purchased from Alfa-Aesar and stored in the glove box. Tetrabutylammonium tetrafluoroborate (TBAB), dimethyl sulfoxide (DMSO), potassium hydroxide (KOH), and Nafion solution (5 wt.%) were purchased from Sigma–Aldrich, Pt/C (20 wt.%) catalysts were purchased from Alfa Aesar, and pure Argon gas (Purity: 99.999 %), pure hydrogen gas (Purity: 99.999 %) were purchased from Chem-Gas Pte Ltd (Singapore). All chemical reagents were utilized as received without further purification. Water was purified through a Millipore system.

Li X., Fang Y., Wang J., Fang H., Xi S., Zhao X., Xu D., Xu H., Yu W., Hai X., Chen C., Yao C., Tao H.B., Howe A.G., Pennycook S.J., Liu B., Lu J, & Su C. (2021). Ordered clustering of single atomic Te vacancies in atomically thin PtTe2 promotes hydrogen evolution catalysis. Nature Communications, 12, 2351.

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Synthesis of Colloidal Nanocrystals

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Silver (I) iodide (AgI, 99.9%), tellurium (Te, 99.999%) was purchased from Alfa aesar. Indium (III) acetate (In(ac)₃, 99.99%), sulfur powder (S₈, 99.9%), oleic acid (OA, 99%), 1-octadecene (ODE, 99%), tris(trimethylsilyl)phosphine ((TMS)₃P, 99.9%), selenium (Se, 99.9%), and n-trioctylphosphine (TOP, 99%) were purchased from Uniam. Gallium (III) acetylacetonate (Ga(acac)₃, 99.99%), oleylamine (OAm, 70%), 1-dodecanethiol (DDT, ≥98%), diphenylphosphine (DPP, 98%), ethanol (>99.8%), and all solvents including toluene (anhydrous 99.8%), ethanol (anhydrous ≥99.5%) were purchased from Sigma-Aldrich. Gallium chloride (GaCl₃, 98%) was purchased from TCI. All chemicals, unless otherwise stated, were used as received.

Lee H.J., Im S., Jung D., Kim K., Chae J.A., Lim J., Park J.W., Shin D., Char K., Jeong B.G., Park J.S., Hwang E., Lee D.C., Park Y.S., Song H.J., Chang J.H, & Bae W.K. (2023). Coherent heteroepitaxial growth of I-III-VI2 Ag(In,Ga)S2 colloidal nanocrystals with near-unity quantum yield for use in luminescent solar concentrators. Nature Communications, 14, 3779.

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Colloidal Synthesis of Quantum Dots

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Oleic acid (OA, 90%), 1-octadecene (ODE,
90%), trioctylphosphine (TOP, 90%), 1,8-octanedithiol (8DT, ≥
97%), cadmium chloride (CdCl₂, 99.99%), indium chloride
(InCl₃, ≥ 99.999%), zinc chloride (ZnCl₂, 99.999%) and lithium perchlorate (LiClO₄, 99.99%) were
purchased from Sigma-Aldrich. Cadmium oxide (CdO, 99.998%) and tellurium
(Te, −18 + 60 mesh, 99.999%) were purchased from Alfa Aesar.
The indium-doped tin oxide substrates (ITO, film thickness ∼100
nm, R_sq ≤ 20 Ω/cm²) were obtained from PGO Germany. Anhydrous acetone (≥99.8%)
was purchased from VWR chemicals. Anhydrous methanol (MeOH, 99.8%),
1-butanol (BuOH, 99.8%), toluene (99.8%), and acetonitrile (99.99%)
were all obtained from Sigma-Aldrich. Before use, the OA was degassed
at 100 °C for 1 h, and the acetonitrile was dried by an Inert
Technology PureSolv Micro Solvent Purification System. All other chemicals
were used as-received. Cadmium and tellurium compounds are toxic and
carcinogenic and should be handled with care.

van der Stam W., du Fossé I., Grimaldi G., Monchen J.O., Kirkwood N, & Houtepen A.J. (2018). Spectroelectrochemical Signatures of Surface Trap Passivation on CdTe Nanocrystals. Chemistry of Materials, 30(21), 8052-8061.

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Synthesis of 1T' and 2H MoTe2

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1T′-MoTe₂ was prepared using a stoichiometric mixture of elemental molybdenum (Sigma Aldrich, 99.95%) and tellurium (Alfa Aesar, 99.999%). The powders were sealed under a vacuum pressure of 4.5 × 10⁻² mbar in a quartz ampoule which was carefully shaken in order to homogenize the mixture. The nanocrystalline phase was prepared by heating at 400 °C for 16 h before being allowed to cool to room temperature. The materials were reground and reannealed using the same heating protocols before being characterised. 2H-MoTe₂ was synthesised by reannealing 1T′-MoTe₂ at 700 °C (temperature ramp of 5 °C per min) for 24 h and cooling naturally to room temperature.

McGlynn J.C., Dankwort T., Kienle L., Bandeira N.A., Fraser J.P., Gibson E.K., Cascallana-Matías I., Kamarás K., Symes M.D., Miras H.N, & Ganin A.Y. (2019). The rapid electrochemical activation of MoTe2 for the hydrogen evolution reaction. Nature Communications, 10, 4916.

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Synthesis of Colloidal Nanocrystals

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Octadecene (ODE, Alpha Aesar, 90%), cadmium acetate dihydrate (Cd(OAc)₂.2H₂O,Sigma-Aldrich, 98%), cadmium oxide (CdO, Strem Chemicals, 99.99%), myristic acid (Aldrich, >99%), oleic acid (OA, Alpha Aesar 90%), trioctylphosphine (TOP, Alpha Aesar, 90%), selenium (Strem Chemicals 99.99%), sulfur (Sigma-Aldrich), tellurium (Alpha Aesar, 18 + 60 mesh, 99.999%), hexane (VWR Chemicals), ethanol absolute (VWR Chemicals), methanol (VWR Chemicals)

Dabard C., Guilloux V., Gréboval C., Po H., Makke L., Fu N., Xu X.Z., Silly M.G., Patriarche G., Lhuillier E., Barisien T., Climente J.I., Diroll B.T, & Ithurria S. (2022). Double-crowned 2D semiconductor nanoplatelets with bicolor power-tunable emission. Nature Communications, 13, 5094.

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