Octylamine (OcAm, 99.0%), oleic acid (HOA, ≥99%) and cadmium chloride (CdCl2, 99.99%) were purchased from Sigma-Aldrich/Merck. Selenourea (99.97%) and analytical grade hexane (99.99%, anhydrous) were purchased from Alfa Aesar. Ethanol (99.9%, extra dry) was purchased from Acros. Tetrachloroethylene (TCE, ≥99.9%, anhydrous) was purchased from Merck-Millipore. Octylamine was dried via freeze–pump–thawing for three times. All other reagents were used as received without further purification.
Selenourea
Manufactured by Thermo Fisher Scientific
Selenourea is a chemical compound with the formula (H2N)2CSe. It is a white crystalline solid that is used as a laboratory reagent. Selenourea has a core function as a source of selenium in chemical reactions and processes.
Automatically generated - may contain errors
Lab products found in correlation
Octylamine, by Merck Group (1 mentions)
Cadmium chloride, by Merck Group (1 mentions)
Ethanol, by Thermo Fisher Scientific (1 mentions)
Tetrachloroethylene, by Merck Group (1 mentions)
Oleic acid, by Merck Group (1 mentions)
Chromasolv for hplc, by Merck Group (1 mentions)
Oleylamine, by Merck Group (1 mentions)
Diethylamine, by Merck Group (1 mentions)
N propylamine, by Merck Group (1 mentions)
N octylamine, by Merck Group (1 mentions)
Di n octylamine, by Merck Group (1 mentions)
Phenethylamine, by Merck Group (1 mentions)
N dodecylamine, by Merck Group (1 mentions)
Cd oac 2 2h2o, by Merck Group (1 mentions)
Tri n octylphosphine top, by Merck Group (1 mentions)
Squid vsm 7t, by Quantum Design (1 mentions)
Ppms16t, by Quantum Design (1 mentions)
4 protocols using selenourea
1
Synthesis of Cadmium Selenide Nanocrystals
2
Synthesis of Semiconductor Nanocrystals
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Di-n-octylamine (+98%), di-n-pentylamine
(99%), di-n-propylamine (99%), diethylamine (>99.5%),
phenethylamine
(≥99%), n-dodecylamine (≥99%), n-octylamine (+99%), n-pentylamine (+99%), n-propylamine (+98%), Cd(OAc)2·2H2O (>98%), trin-octylphosphine (TOP) (97%), and
oleylamine
(or cis-9-octadecenylamine, technical grade, 70%) were obtained from
Sigma-Aldrich. Selenourea (99.9%, metal basis) was obtained from Alpha
Aesar. All were used as received and stored under N2. Toluene
was obtained from Sigma-Aldrich (CHROMASOLV for HPLC, ≥99.9%).
Transmission electron microscopy (TEM) sample grids (Cu with holey
carbon film) were obtained from Ted Pella, Inc.
All synthetic
procedures were conducted under dry N2, except the final
washing steps, which were conducted in the ambient atmosphere. The
reaction mixtures were not stirred. The synthetic products were generally
stored as reaction mixtures, after addition of TOP (see below).
(99%), di-n-propylamine (99%), diethylamine (>99.5%),
phenethylamine
(≥99%), n-dodecylamine (≥99%), n-octylamine (+99%), n-pentylamine (+99%), n-propylamine (+98%), Cd(OAc)2·2H2O (>98%), trin-octylphosphine (TOP) (97%), and
oleylamine
(or cis-9-octadecenylamine, technical grade, 70%) were obtained from
Sigma-Aldrich. Selenourea (99.9%, metal basis) was obtained from Alpha
Aesar. All were used as received and stored under N2. Toluene
was obtained from Sigma-Aldrich (CHROMASOLV for HPLC, ≥99.9%).
Transmission electron microscopy (TEM) sample grids (Cu with holey
carbon film) were obtained from Ted Pella, Inc.
All synthetic
procedures were conducted under dry N2, except the final
washing steps, which were conducted in the ambient atmosphere. The
reaction mixtures were not stirred. The synthetic products were generally
stored as reaction mixtures, after addition of TOP (see below).
3
Synthesis of WSe2-PVP Nanoparticles
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Selenourea (Reagent grade −99.97%) and tungsten hexachloride (WCl6) were obtained from Alfa Aesar. PVP was available from Sinopharm Chemical Reagent Co., Ltd. N and was used to fabricate different types of WSe2‐PVP NPs. PVA (The viscosities of PVA‐1, PVA‐2, and PVA‐3 are 2.8, 3.3, and 5.0 mpa.s, respectively) and other commercial cryoprotectant such as DMSO, glycerol, hetastarch (HES), biological sugars were purchased from Aladdin Ltd.
4
Synthesis and Characterization of (Li1-xFex)OHFeSe
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The (Li1−xFex)OHFeSe single
crystals were synthesized by the hydrothermal ion-exchange method7 . First, 6 g LiOH (J&K, 99% purity) was
dissolved in 15 ml deionized water in a teflon-linked stainless-steel
autoclave (volume 50 ml). Then, 0.6 g iron powder (Aladdin
Industrial, 99% purity), 0.3 g selenourea (Alfa Aesar,
99% purity) and several pieces of
K0.8Fe2−xSe2 single
crystals were added to the solution. After that, the autoclave was sealed and
heated up to 120 °C followed by staying for 40 to
50 h. Finally, the
(Li1−xFex)OHFeSe single
crystals can be obtained by leaching. The DC magnetization measurement was
carried out with a SQUID-VSM-7T (Quantum Design) with a resolution of 5
× 10−8 e.m.u. The resistivity
measurement was done on a PPMS-16T (Quantum Design) with the standard four-probe
method.
crystals were synthesized by the hydrothermal ion-exchange method7 . First, 6 g LiOH (J&K, 99% purity) was
dissolved in 15 ml deionized water in a teflon-linked stainless-steel
autoclave (volume 50 ml). Then, 0.6 g iron powder (Aladdin
Industrial, 99% purity), 0.3 g selenourea (Alfa Aesar,
99% purity) and several pieces of
K0.8Fe2−xSe2 single
crystals were added to the solution. After that, the autoclave was sealed and
heated up to 120 °C followed by staying for 40 to
50 h. Finally, the
(Li1−xFex)OHFeSe single
crystals can be obtained by leaching. The DC magnetization measurement was
carried out with a SQUID-VSM-7T (Quantum Design) with a resolution of 5
× 10−8 e.m.u. The resistivity
measurement was done on a PPMS-16T (Quantum Design) with the standard four-probe
method.
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