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Product Code M2151C1-1g
Price £350 ex. VAT

Low price, high purity 2D metal titanium(IV) selenide powder and crystals

For the development of next-generation electronics, optoelectronics, and nanotechnology

Technical Data | MSDS | Structure | Literature and Reviews | Related Products | Resources and Support

Titanium(IV) selenide (also known as titanium diselenideTiSe2), CAS number 12067-45-7, is a family member of Group IV transition metal dichalcogenides (TMDCs), and is of great interest as one of the typical charge density wave (CDW) materials. It is known that the CDW characteristics of TiSe2 can be changed; they are typically suppressed. In some cases, this leads to superconductivity or magnetic order by applying high pressure or intercalation. 

TiSe2 has an octahedral crystal structure (1T, space group D3d) with van der Waals stacked layers. In its bulk form, 1T-TiSe2 undergoes a phase transition from a semimetal (1 × 1 × 1 normal phase) to a commensurate CDW (2 × 2 × 2 CDW) at around 200 K. Recent discoveries have demonstrated that superconductivity in TiSe2 can be induced either by field-effect doping of few-layer TiSe2, or copper doping to form CuxTiSe2. In both cases, the suppression of the CDW is considered essential to achieve superconductivity.

TiSe2 has an electronic structure near the Fermi energy level comparable to that of a semiconductor. Its valence and conduction bands overlap slightly through an indirect gap. Rather interestingly,  TiSehas an exotic ground state, the 'excitonic insulator' phase.

High Purity 12067-45-7

High Purity

≥99.999% Crystal Purity

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Low Cost 12067-45-7

Low Cost

Low Cost Titanium(IV) Selenide

Different Forms of Titanium(IV) Selenide

Powder & Crystal

Different Forms of Titanium(IV) Selenide

We supply low price titanium(IV) selenide in several different forms for a range of applications.

Titanium(IV) selenide powder

Titanium(IV) Selenide Powder

Can be used for preparation of titanium(IV) selenide nanoplates and ultrathin films

Sold by weight

≥99.995% purity

From £350

Titanium(IV) selenide crystals by size

Titanium(IV) Selenide Crystals by Size

Can be used to produce single or few-layer titanium(IV) selenide sheets via mechanical or liquid exfoliation

Small (≥10 mm2) or medium (≥25 mm2) crystals available*

≥99.999% purity

From £520

*Typical representative size, areas/dimensions may vary

Bulk single titanium(IV) selenide crystal is most commonly used as sources from which single or few-layer sheets can be obtained via either mechanical or liquid exfoliation. 

Titanium(IV) selenide powder can also be used to prepare TiSe2 nanosheets and nanoparticles by liquid-exfoliation (normally assisted by sonication). 

Technical Data

CAS Number 12067-45-7
Chemical Formula TiSe2
Molecular Weight 205.79 g/mol
Bandgap N/A
Preparation Synthetic - Chemical Vapour Transport (CVT)
Structure Octahedral (1T)
Electronic Properties Semimetal, Charge Density Waves (CDW)
Melting Point N/A
Colour Dark brown
Synonyms Titanium Diselenide (TiSe2), Bis(selanylidene)titanium
Classification / Family Transition metal dichalcogenides (TMDCs), Charge Density Wave (CDW), Superconductivity, Nano-electronics, Nano-photonics, Photovoltaic, Materials science

Product Details

Form Purity
Powder ≥99.995%
Crystal ≥99.999%

Pricing Table

Product Code Form Size/Weight* Price
M2151C1 Powder 1 g £350
M2151A10 Crystal Small (≥10 mm2) £520 ea.

*Typical representative size, areas/dimensions may vary

Shipping is free for qualifying orders.

MSDS Documents

Titanium disufide powder MSDSTitanium(IV) selenide powder

Titanium disufide crystal MSDSTitanium(IV) selenide crystal

Structure of Titanium(IV) Selenide

TiSe2 has an octahedral crystal structure (1T, space group D3d) with van der Waals stacked layers. Monolayer TiSe2 consists of stacked Se–Ti–Se atomic layers, in which Ti and Se atoms are strongly bound within the layer. Ti atom is located in the center of the octahedral, which is the inversion symmetry point.

TiSe2 crystal structure
Top and side view of single-layer titanium(IV) selenide (1T-TiSe2)

Literature and Reviews

  • Enhancing charge-density-wave order in 1T-TiSe2 nanosheet by encapsulation with hexagonal boron nitride, L. Li et al., Appl. Phys. Lett. 109, 141902 (2016); doi: 10.1063/1.4963885.
  • Unveiling the charge density wave inhomogeneity and pseudogap state in 1T-TiSe2, K. Zhang et al., Sci. Bull., 63, 426–432 (2018); doi: 10.1016/j.scib.2018.02.018.
  • Unconventional Charge-Density-Wave Transition in Monolayer 1T‑TiSe2, K. Sugawara et al., ACS Nano, 10, 1341−1345 (2016); DOI: 10.1021/acsnano.5b06727.

We stock a wide range of 2D materials available to purchase online. Please contact us if you cannot find what you are looking for.

Resources and Support

Viscoelastic Transfer of 2D Material Using PDMS

Viscoelastic transfer using polydimethylsiloxane (PDMS) stamps is one of the methods used for the deterministic placement of 2D materials and the fabrication of van der Waals heterostructures. It relies on the viscoelasticity of PDMS, which behaves as an elastic solid on short time scales, but as a viscous fluid on long time scales.

Learn more...
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