Pricing
Size | Product code | Size description* | Quantity (EA) | Price |
Small | M2144A10 | >10 mm2 | 1 | £396.00 |
Medium | M2144A25 | >25 mm2 | 1 | £637.00 |
*typical representative size, areas/dimensions may vary
General Information
CAS number | 12143-72-5 |
Chemical formula | TaS2 |
Molecular weight | 245.07 g/mol |
Bandgap | n/a |
Synonyms | Dithioxotantalum, Tantalum (IV) sulfide, Bis(sulfanylidene)tantalum |
Classification / Family | Transition metal dichalcogenides (TMDCs), 2D charge density wave (CDW) materials, Nano-electronics, Nano-photonics, Superconductivity, Photovoltaic, Materials science |
Product Details
Form | Single Crystal |
Preparation | Synthetic - Chemical Vapour Transport (CVT) |
Purity | ≥ 99.999% |
Structure | Hexagonal (2H) |
Electronic properties | 2D CDW materials |
Melting point | > 1,300 °C |
Appearance | Dark brown |
General Description
Tantalum disulfide (TaS2) crystals have stacked layers, in which sheets of transition metal atoms lie between the chalcogen atom sheets in an S-Ta-S sequence. In each sheet, atoms are closely packed in a hexagonal pattern. The chemical bonding within the layer is covalent, while individual layers are bound by van der Waals (vdWs). This makes intercalation between layers possible and allows layers to be peeled off by exfoliation.
Layered TaS2 exhibits a unique combination of valuable structural, mechanical, and electronic phases. 1T and 2H phases are the most representative structures. The distinction between two phases can be the S-Ta-S coordinated situations, which are recognised as octahedral coordination (1T) and prismatic coordination (2H).
Bulk 2H-TaS2, exhibits a charge density wave (CDW) transition at 70K and a superconductivity transition at 0.8K [1].
Applications
2H-Tantalum disulfide has been used for the investigation of fundamental physical phenomena such as CDW associated with the dimensionality effect. Metallic 2H-TaS2 has also been proven to be an efficient electrocatalyst for the hydrogen evolution reactions (HER), with a performance that is comparable to platinum, owing to its abundant active sites concentrated at edges and basal-planes, as well as the self-optimising morphological change of 2H-TaS2.
Synthesis
Tantalum disulfide is manufactured using chemical vapour transport (CVT) crystallisation, with crystals having a purity in excess of 99.999%.
Usage
Tantalum disulfide single crystals can be used to prepare mono- and few-layer TaS2 by mechanical or liquid exfoliation.
Literature and Reviews
- Enhanced superconductivity in atomically thin TaS2, E. Navarro-Moratalla et al., Nat. Commun., 7:11043 (2016); DOI: 10.1038/ncomms11043.
- Enhanced superconductivity upon weakening of charge density wave transport in 2H-TaS2 in the two-dimensional limit, Y. Yang et al., Phys. Rev., 98, 035203 (2018); DOI: 10.1103/PhysRevB.98.035203.
- Toward Exploring the Structure of Monolayer to Few-layer TaS2 by Efficient Ultrasound-free Exfoliation, Y. Hu et al., Nanoscale Res. Lett., 13:20 (2018); DOI 10.1186/s11671-018-2439-z.
- Three-dimensional resistivity and switching between correlated electronic states in 1T-TaS2, D. Svetin et al., 7:46048 (2017); DOI: 10.1038/srep46048.
To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.
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如题,之前没做过药代,老师给了一个600+Da的五肽,想测下药代动参数,看文献推荐上述两种方法,但是不知道选哪种更好,lcms前处理会不会影响小肽。
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有机的是有机化合物的简称,它指的是含碳化合物.
但是,有四大类常见物质一般不作为有机物处理:
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2、碳酸及其盐,如CaCO3.
3、金属碳化物,如CaC2.
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水的化学式为H2O,它不含有碳元素,故不是有机物.
但若所描述的水不是化学意义的水,而是自然界存在的天然水,那么,水中会溶有一定量的有机物.