Like other TMDC family members, tungsten disulfide (WS2) has a two-dimensional structure. It consists of a layer of hexagonally-arranged tungsten atoms positioned between two layers of hexagonally-arranged sulphur atoms.
Individual layers are held together by Van der Waals forces. This makes it possible for single to few-layer ultra-thin films to be prepared from bulk crystals using mechanical exfoliation techniques. The primitive unit cell of WS2 consists of one tungsten atom and two sulphur atoms, arranged in a trigonal prismatic configuration.
With a photoluminescence (PL) quantum yield that is almost two orders of magnitude higher at room temperature than MoS2, WS2 is one of the most popular 2D semiconducting TMDCs materials, and is widely explored for applications in light-emitting devices, solar cells, and photodetectors.
General Information
| CAS number | 12138-09-9 |
| Chemical formula | WS2 |
| Molecular weight | 247.97 g/mol |
| Bandgap | 1.4 - 2.01 eV [1] |
| Synonyms | Tungsten sulphide, Tungsten sulfide, Tungsten (IV) sulfide |
| Classification / Family | Transition metal dichalcogenides (TMDCs), 2D semiconductor materials, Nano-electronics, Nano-photonics, Materials science |
Product Details
| Form | Single Crystal |
| Preparation | Synthetic - Chemical Vapour Transport (CVT) |
| Purity | ≥ 99.999% |
| Structure | Hexagonal |
| Electronic properties | 2D semiconductor |
| Melting point | 1250 °C (lit.) |
| Colour | Black |
Chemical Structure
Applications
In the form of single or few-layer thin films, exfoliated WS2 nanosheets find applications ranging from light emitters, field effect transistors (FETs) and photovoltaics. Like many other TMDCs, they are actively used in condensed matter physics and photonics research.
Synthesis
Tungsten disulfide WS2 is manufactured using chemical vapour transport (CVT) crystallisation, with crystals having a purity in excess of 99.999%.
Usage
Tungsten disulfide WS2 can be used to prepare monolayer and few-layer WS2 by mechanical or liquid exfoliation.
Viscoelastic transfer of 2D material using PDMS
MSDS Documentation
Tungsten disulfide crystal MSDS sheet
Pricing
| Size | Product code | Size description* | Quantity (EA) | Price |
| Small | M2110A10 | >10 mm2 | 1 | £396.00 |
| Medium | M2110A25 | >25 mm2 | 1 | £637.00 |
| Large** | M2110A00 | >100 mm2 | 1 | £1320.00 |
*typical representative size, areas/dimensions may vary
**item with a lead time of 2-3 weeks, please contact for more information
Literature and Reviews
- Controlled Synthesis and Transfer of Large-Area WS2 Sheets: From Single Layer to Few Layers, A. Elı´as et al., ACS Nano, 7 (6), 5235–5242 (2013); DOI: 10.1021/nn400971k.
- Extraordinary Room-Temperature Photoluminescence in Triangular WS2 Monolayers, H. R. Gutiérrez et al., Nano Lett., 13 (8), 3447–3454 (2013); DOI: 10.1021/nl3026357.
- Controlled Growth of High-Quality Monolayer WS2 Layers on Sapphire and Imaging Its Grain Boundary, Y. Zhang et al., ACS Nano, 7 (10), 8963–8971 (2013); DOI: 10.1021/nn403454e.
- Photosensor Device Based on Few-Layered WS2 Films, N. Perea-López et al., Adv. Funct. Mater., 23, 5511–5517 (2013); DOI: 10.1002/adfm.201300760.
- Direct Chemical Vapor Deposition Growth of WS2 Atomic Layers on Hexagonal Boron Nitride, M. Okada et al., ACS Nano, 8 (8), 8273–8277 (2014); DOI: 10.1021/nn503093k.
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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就是蛋白质分子的小片断
是氨基酸形成的
求助各位前辈，我最近在合成的化合物水溶性很好，非常好，以至于可以随便溶解在水里，它的六氟磷酸盐也可以随意溶解在水里（大于50uM），细胞成像实验显示它根本进不去细胞，求问有没有啥方法包裹一下让它进去？我搜了一下文献，感觉多数是把脂溶性特别好的东西包裹一下弄进去的，也许是搜索姿势不对没找到我需要的答案，**点拨啊！！！
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。
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：
1、碳的氧化物,如CO和CO2.
2、碳酸及其盐,如CaCO3.
3、金属碳化物,如CaC2.
4、拟卤素及其化合物,如(CN)2与KSCN.
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.
