Selenium powder

Manufactured by Thermo Fisher Scientific

Sourced in United States

Selenium powder is a high-purity chemical element used in various laboratory applications. It is a non-metallic mineral that exhibits semiconductor properties. Selenium powder is a yellow-gray, odorless, and crystalline solid material.

Automatically generated - may contain errors

Lab products found in correlation

Close spelling variants of this product

Selenium (75 citations)

22 protocols using selenium powder

Synthesis of Single-Crystalline TaSe3 by CVT

Check if the same lab product or an alternative is used in the 5 most similar protocols

The single-crystalline TaSe₃ was prepared by the CVT method (as described in Figure 1a). For the growth of TaSe₃, stoichiometric amounts of tantalum powder (0.42 g, Alfa Aesar, 99.97%, Haverhill, MA, USA) and selenium powder (0.58 g, Alfa Aesar, 99.999%, Haverhill, MA, USA), with iodine (10 mg, Sigma Aldrich, 99.999%, Saint Louis, MO, USA) as a transport agent, were placed in a quartz tube (18 × 1 cm) that was subsequently evacuated and sealed. After that, the tube was placed in a home-made two-zone tube furnace. The reaction zone was slowly heated to 670 °C, and maintained at constant temperature for 10 days to allow for the compound synthesis. Similarly, the temperature of the growing zone was maintained at 600 °C (heating rate: 200 °C/h). Finally, the furnace was switched off, and cooled down to room temperature (cooling rate: 50 °C/h).

Kim B.J., Jeong B.J., Oh S., Chae S., Choi K.H., Nasir T., Lee S.H., Lim H.K., Choi I.J., Hong M.K., Yu H.K., Lee J.H, & Choi J.Y. (2019). Thickness-Dependence Electrical Characterization of the One-Dimensional van der Waals TaSe3 Crystal. Materials, 12(15), 2462.

+ Open protocol

+ Expand

Synthesis of Cadmium Oleate Nanoparticles

Check if the same lab product or an alternative is used in the 5 most similar protocols

Zinc acetate (99.99 % trace metals basis), oleic acid (technical grade, 90%), 1-octadecene (ODE, 90%), and Trioctylphosphine (TOP, 90%) were purchased from Sigma-Aldrich. Cadmium oxide (CdO, 99.9%), 1-octadecene (ODE, 90%), selenium powder (Se,100mesh,99.99%), and sulfur powder (S,99.98% trace metals basis) were purchased from Alfa-Aesar. Cadmium oleate is prepared by adding 1 mmol CdO into 1 mL oleic acid and 3 mL ODE, followed by heating to 200 °C for 30 min in Ar flow.

Chen X., Lin X., Zhou L., Sun X., Li R., Chen M., Yang Y., Hou W., Wu L., Cao W., Zhang X., Yan X, & Chen S. (2023). Blue light-emitting diodes based on colloidal quantum dots with reduced surface-bulk coupling. Nature Communications, 14, 284.

+ Open protocol

+ Expand

Synthesis and Characterization of Antimony-Selenium-Sulfur Materials

Check if the same lab product or an alternative is used in the 5 most similar protocols

Antimony powder (100 mesh, 99.5%; Sigma-Aldrich, St. Louis, Missouri), selenium powder (100 mesh, 99.99%; Alfa Aesar, Heysham, UK), sulfur powder, 1,2-ethanedithiol (EDT, >98%; Alfa Aesar), ethylenediamine (en, >99%; Acros Organics, Geel, Belgium). All the reagents were used without additional purification.
Glass substrates were cleaned by immersion in freshly prepared Piranha solution (4 : 1 vol 98% H₂SO₄ : 30% H₂O₂; CAUTION: exothermic reaction) and then dried under an N₂ stream. Fluorine-doped tin oxide (FTO) glass substrates (FTO glass TEC 15A, 2.2 mm thick; XOPFisica) were cut, cleaned by sequential sonication in acetone, isopropanol, Alconox solution, and deionized (DI) water for 30 minutes each, dried under an N₂ stream, and treated in a UV-ozone cleaner (Ossila Ozone Cleaner) for 20 minutes. An Au-coated Si wafer was prepared by depositing 10 nm of Ti followed by 100 nm of Au with a VST e-beam evaporator.

Vashishtha A., Vana O, & Edri E. (2021). Solvent composition regulates the Se : Sb ratio in antimony selenide nanowires deposited from thiol–amine solvent mixtures. Nanoscale Advances, 4(3), 772-781.

+ Open protocol

+ Expand

Colloidal Synthesis of Semiconductor Nanoparticles

Check if the same lab product or an alternative is used in the 5 most similar protocols

Selenium powder (Se, 99.999%), cadmium oxide
(CdO, 99.95%), 1-octadecane (ODE, 90%), oleic acid (OA, 90%), tri-n-octyl phosphine (TOP, 90%), and poly(methyl methacrylate)
(PMMA, average MW 350 000) were purchased from Alfa Aesar.
Tributylphosphine (TBP, 95%), sulfur powder (99.99%), and oleylamine
(80–90%) were purchased form Aladdin-reagent. Solvents such
as toluene, ethanol, and acetone were used as received.

Hu L., Xu T., Zhu H., Ma C, & Chen G. (2019). Luminescence Change of CdS and CdSe Quantum Dots on a Ag Film. ACS Omega, 4(10), 14193-14201.

+ Open protocol

+ Expand

Synthesis of Chalcogenide Nanocrystals

Check if the same lab product or an alternative is used in the 5 most similar protocols

Cadmium oxide (99.99%), sulfur powder (99.98%), and oleylamine (70%) were purchased from Aldrich. Selenium powder (200 mesh, 99.999%), 1-octadecence (90%), octadecylamine (97%), dioctylamine (96%), oleic acid (90%), and octadecane (90%) were purchased from Alfa-Aesar. Tributylphosphine (95%) was purchased from Aladdin. Hexane, toluene, aceton, and methanol were purchased from Sinopharm Chemical Reagents. All chemicals were used directly without any further purification.

Lv B., Zhang H., Wang L., Zhang C., Wang X., Zhang J, & Xiao M. (2018). Photon antibunching in a cluster of giant CdSe/CdS nanocrystals. Nature Communications, 9, 1536.

+ Open protocol

+ Expand

Synthesis of Cadmium Selenide Nanocrystals

Check if the same lab product or an alternative is used in the 5 most similar protocols

Cadmium oxide (CdO, 325 mesh, 99.5%) and selenium powder (Se, 325 mesh, 99.5%) were purchased from Alfa Aesar (China) Chemicals Co., Ltd. Cadmium stearate (Cd(St)₂) was purchased from Shanghai Debo Chemical Technology Co., Ltd. Octadecylphosphonic acid (ODPA, 98%) was purchased from EPSILON CHIMIE (Brittany, France). Hexylphosphonic acid (HPA, 98%) was purchased from IRRITANT. 1-Octadecene (ODE, >90%), zinc diethyldithiocarbamate (Zn(DDTC)₂, >99%), hexyldecylamine (HDA, >95%), sulfur (S, 98.5%), and trioctylphosphine (TOP, 85%) were purchased from TCI (Shanghai) Development Co., Ltd. Trioctylphosphine oxide (TOPO, 98%) was purchased from Shanghai Macklin Biochemical Co., Ltd. Ethanol (AR) and dimethylbenzene were purchased from Tianjin Damao Chemical Reagent Co., Ltd. Silicone resin (Dow Corning-6662) was from Dow Corning. Lu₃Al₅O₁₂:Ce (LuAG:Ce) phosphor was from Grirem Advanced Materials Co., Ltd. All chemicals were used directly without further purification unless otherwise stated. Table 1 shows the information of the purchased chemicals.

Chen Y., Xing W., Liu Y., Zhang X., Xie Y., Shen C., Liu J.G., Geng C, & Xu S. (2020). Efficient and Stable CdSe/CdS/ZnS Quantum Rods-in-Matrix Assembly for White LED Application. Nanomaterials, 10(2), 317.

+ Open protocol

+ Expand

Synthesis of Colloidal Nanocrystals

Check if the same lab product or an alternative is used in the 5 most similar protocols

Styrene (≥ 99.0%), divinylbenzene (DVB, 80%), azobisisobutyronitrile (AIBN, 98%), tin(II) 2-ethylhexanoate (92.5–100%), ε-caprolactone (97%), poly(ethylene glycol) (PEG, M_W 2,500), trioctylphosphine oxide (TOPO, 99%), 1-octadecene (ODE, 90%), toluene (≥ 99.7%), m ethanol (≥ 99.8%), isopropanol (≥ 99.8%), oleylamine (OLA, 70–80%), 1-octanethiol (98.5%) and acetone (≥ 99.5%) were obtained from Sigma Aldrich Co. Polyvinylpyrrolidone (PVP, M_W 40,000), cadmium oxide (CdO, 99.998%), selenium powder (200 mesh, 99.999%) and oleic acid (OA, 90%) were purchased from Alfa Aesar. toluene, ethanol and n-heptane (all spectr. grade) as well as n-hexane (≥ 99%) were obtained from Merck KGaA. ethanol (abs., 99.9%) and dichloromethane (HPLC grade) were obtained from Chemsolute. Benzyldimethyloctadecylammonium chloride (OBDAC, 98.9%) was purchased from HPC Standards GmbH, Nile red (NR) from Fluka Analytical, n-octadecylphosphonic acid (ODPA, > 99%) from PCI Synthesis and tri-n-octylphosphine (TOP, 99.7%) as well as deuterated chloroform (99.8 atom%) from ABCR. All solvents used for the optical measurements were of spectroscopic grade and all chemicals were employed as received without further purification.

Scholtz L., Eckert J.G., Elahi T., Lübkemann F., Hübner O., Bigall N.C, & Resch-Genger U. (2022). Luminescence encoding of polymer microbeads with organic dyes and semiconductor quantum dots during polymerization. Scientific Reports, 12, 12061.

+ Open protocol

+ Expand

Synthesis of Chalcogenide Nanocrystals

Check if the same lab product or an alternative is used in the 5 most similar protocols

Cadmium acetate dihydrate (Cd(OAc)₂•2H₂O 99.999%, Alfa Aesar), tellurium powder (99.99%, Alfa Aesar), selenium powder (99.99%, Alfa Aesar), oleylamine (OLA, 90%, Aldrich), tri-n-octylphosphine (TOP, 90%, Aldrich), octylamine (OTA, 99%, Aldrich), ethylacetate (99.5%, Tianjin Zhiyuan Chemical), and nitrogen gas (N₂, 99.99%, Chengdu Taiyu gas Co. Ltd.) were used as received without further purification unless stated otherwise. Toluene (AR grade, Chengdu Kelong Chemical) was distilled and further dried with MgSO₄ (99%, Tianjin Zhiyuan Chemical). Oleylamine (OLA) was stored in a freezer, while the other chemicals were stored under an ambient environment.

Gao D., Hao X., Rowell N., Kreouzis T., Lockwood D.J., Han S., Fan H., Zhang H., Zhang C., Jiang Y., Zeng J., Zhang M, & Yu K. (2019). Formation of colloidal alloy semiconductor CdTeSe magic-size clusters at room temperature. Nature Communications, 10, 1674.

+ Open protocol

+ Expand

Synthesis and Characterization of ZrSe3 Crystals

Check if the same lab product or an alternative is used in the 5 most similar protocols

The ZrSe₃ crystals were synthesized via a CVT method [27 (link)]. The starting materials were zirconium powder (Zr, 100 mesh, purity >96%, Sigma Aldrich, Burlington, VT, USA), selenium powder (Se, 200 mesh, purity 99.999%, Alfa Aesar, Tewksbury, MA, USA), and iodine (I₂, flakes, purity 99.8%, Sigma Aldrich, Burlington, VT, USA) as the transport agent. The Zr and Se powders with molar ratio of 1:3 were homogeneously mixed and sealed under vacuum in a closed quartz ampoule with an I₂ concentration of 5 mg/mL. The ampoule was heated in a tube furnace at 1173 K for 120 h, followed by furnace cooling for 15 h. The as-synthesized product was shiny silver flakes. A dense ZrSe₃ pellet for thermal property measurements was prepared by grinding the ZrSe₃ crystals and cold-pressing the powder under 63 MPa at room temperature, followed by annealing at 1173 K for 24 h in a vacuum-sealed quartz tube. The liquid-phase exfoliation was performed by sonicating the ZrSe₃ crystals in acetone for 4 h.

Xu Y., Guo S, & Chen X. (2022). Crystal Growth and Thermal Properties of Quasi-One-Dimensional van der Waals Material ZrSe3. Micromachines, 13(11), 1994.

+ Open protocol

+ Expand

Synthesis of Selenium Stock Solution

Check if the same lab product or an alternative is used in the 5 most similar protocols

Deionized water (18.2 MΩ) was obtained from an Aries Filter Works Reverse Osmosis System. Cadmium chloride (CdCl₂, 99.99 %, trace metals basis), thioglycolic acid (TGA, ≥98 %), sodium borohydride (NaBH₄, ≥98.0 %) and selenium powder (99.999 %, metal basis) were obtained from Alfa Aesar. Dimethyl sulfoxide (DMSO, 99.9 %) was purchased from VWR. Nitric Acid (HNO₃, 67–70 %, trace metal grade, OmniTrace) and HCl (trace metal grade, 34–37 %, Fisher Scientific) were used for the selenium stock solution preparation. A 3:1 solution of aqua regia was prepared using HCl (37 %, Sigma-Aldrich) and nitric acid (65 %, J.T. Baker), respectively. A 5.0 N sodium hydroxide (NaOH) solution was prepared by diluting NaOH (10.0 N standardized solution), purchased from Alfa Aesar. The solutions in each synthetic protocol were purged with 99.99 % pure nitrogen gas obtained from Linde Gas Corporation. Selenium stock solution was prepared by dissolving 4.0 g of selenium powder in 8.0 mL of concentrated HNO₃ in a 125-mL Erlenmeyer flask. The solution was heated in order to evaporate the excess of acid. One hundred (100 mL) of 10 % v/v HCl was then added to reduce Se(VI) to Se(IV). The final concentration of the stock solution was adjusted to 0.5 M.

Rodriguez-Torres M.R., Velez C., Zayas B., Rivera O., Arslan Z., Gonzalez-Vega M.N., Diaz-Diestra D., Beltran-Huarac J., Morell G, & Primera-Pedrozo O.M. (2015). Cytocompatibility of direct water synthesized cadmium selenide quantum dots in colo-205 cells. Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, 17(6), 266.

+ Open protocol

+ Expand

About PubCompare

Our mission is to provide scientists with the largest repository of trustworthy protocols and intelligent analytical tools, thereby offering them extensive information to design robust protocols aimed at minimizing the risk of failures.

We believe that the most crucial aspect is to grant scientists access to a wide range of reliable sources and new useful tools that surpass human capabilities.

However, we trust in allowing scientists to determine how to construct their own protocols based on this information, as they are the experts in their field.

Ready to get started?

Revolutionizing how scientists
search and build protocols!