~ 1.35 eV (direct)
||Rhenium sulphide, Bis(sulfanylidene)rhenium
|Classification / Family
Transition metal dichalcogenides (TMDCs), 2D semiconductor materials, Nano-electronics, Nano-photonics, Photovoltaic, Materials science
||Synthetic - chemical vapour transport (CVT)
Rhenium disulfide (ReS2) is a direct band gap semiconductor that has exhibited outstanding optoelectronic performance due to its weak interlayer coupling. Compared to black phosphorus (BP), ReS2 is a naturally-occurring yet extremely rare TMDC so it is environmentally stable which makes it an ideal candidate for applications in ambient conditions. ReS2 has been found to be a diamagnetic semiconductor, an n-type photovoltaic material with a 1.4 eV optical gap, and exhibits bi-axial optical and electrical properties.
Unlike most of the TMDCs, ReS2 has an unique structure with its in-plane 1D chains of Re atoms. These are arranged into linked parallelograms - forming Re4 “diamond” shapes along the b axis. Such a structure makes it an optically bi-axial material which shows exceptionally anisotropic electrical and optical behaviour for linearly-polarised light.
Exfoliated rhenium disulfide (ReS2) nanosheets are shown to have a strong near-infrared (NIR) absorbance, and could effectively be used in biomedical applications, such as CT imaging and chemo-photothermal cancer treatment. High-purity rhenium disulfide powder is great for obtaining ReS2 nanosheets by liquid exfoliation in mass production.
ReS2 nanosheets and nanoparticles are also used for the fabrication of field-effect transistors, energy storage devices (such as rechargeable batteries, photocatalytic and electrocatalytic hydrogen evolution reactions (HER).
Rhenium disulfide (ReS2) powder is obtained via the CVT method, with a purity in excess of 99.995% achieved.
Rhenium disulfide (ReS2) powder is suitable for liquid chemical exfoliation to prepare GeSe nanosheets and nanoparticles down to few-layer films. ReS2 powder is also used for preparation of mono-layer and few-layer films via chemical vapour deposition (CVD).
Literature and Reviews
Rhenium Dichalcogenides: Layered Semiconductors with Two Vertical Orientations, L. Hart et al., Nano Lett., 16, 1381−1386 (2016); DOI: 10.1021/acs.nanolett.5b04838.
- Liquid Exfoliation of Colloidal Rhenium Disulfide Nanosheets as a Multifunctional Theranostic Agent for In Vivo Photoacoustic/CT Imaging and Photothermal Therapy, Z. Miao et al., Small, 14, 1703789 (2018); DOI: 10.1002/smll.201703789.
- Single-Layer ReS2: Two-Dimensional Semiconductor with Tunable In Plane Anisotropy, Y. Lin et al., ACS Nano, 9 (11), 11249–11257 (2015); DOI: 10.1021/acsnano.5b04851.
- Sequential bottom-up and top-down processing for the synthesis of transition metal dichalcogenide nanosheets: the case of rhenium disulfide (ReS2), N. Al-Dulaimi et al., Chem. Commun., 52, 7878 (2016); DOI: 10.1039/c6cc03316d.
- Albumin-assisted exfoliated ultrathin rhenium disulfide nanosheets as a tumor targeting and dualstimuli-responsive drug delivery system for
a combination chemo-photothermal treatment, Q. Huang et al., RSC Adv., 8, 4624 (2018); DOI: 10.1039/c7ra13454a.
- Monolayer behaviour in bulk ReS2 due to electronic and vibrational decoupling, S. Tongay et al., Nat. Commun., 5:3252 (2014); DOI: 10.1038/ncomms4252.
- Chemical Vapor Deposition of Monolayer Rhenium Disulfi de (ReS2), K. Keyshar et al., Adv. Mater., 27, 4640–4648 (2015); DOI: 10.1002/adma.201501795.