RhS2

/Tag: RhS2

Pressure-induced structural and electronic transitions, metallization, and enhanced visible-light responsiveness in layered rhenium disulphide

2018-06-07T16:33:21+00:00 June 7th, 2018|Categories: Publications|Tags: |

Author(s): Pei Wang, Yonggang Wang, Jingyu Qu, Qiang Zhu, Wenge Yang, Jinlong Zhu, Liping Wang, Weiwei Zhang, Duanwei He, and Yusheng ZhaoTriclinic rhenium disulphide (ReS2) is a promising candidate for postsilicon electronics because of its unique optic-electronic properties. The electrical and optical properties of ReS2 under high pressure, however, remain unclear. Here we present a joint experimental and theoretical study on the st…[Phys. Rev. B 97, 235202] Published Thu Jun 07, 2018

Published in: "Physical Review B".

Publisher Correction: Ultrafast quantum beats of anisotropic excitons in atomically thin ReS<sub>2</sub>

2018-03-22T10:34:01+00:00 March 22nd, 2018|Categories: Publications|Tags: |

Publisher Correction: Ultrafast quantum beats of anisotropic excitons in atomically thin ReS2Publisher Correction: Ultrafast quantum beats of anisotropic excitons in atomically thin ReS<sub>2</sub>, Published online: 22 March 2018; doi:10.1038/s41467-018-03558-5Publisher Correction: Ultrafast quantum beats of anisotropic excitons in atomically thin ReS2

Published in: "Nature Communications".

Liquid Exfoliation of Colloidal Rhenium Disulfide Nanosheets as a Multifunctional Theranostic Agent for In Vivo Photoacoustic/CT Imaging and Photothermal Therapy

2018-02-22T08:31:29+00:00 February 22nd, 2018|Categories: Publications|Tags: |

Abstract Near-infrared light-mediated theranostic agents with superior tissue penetration and minimal invasion have captivated researchers in cancer research in the past decade. Herein, a probe sonication-assisted liquid exfoliation approach for scalable and continual synthesis of colloidal rhenium disulfide nanosheets, which is further explored as theranostic agents for cancer diagnosis and therapy, is reported. Due to high-Z element of Re (Z = 75) and significant photoacoustic effect, the obtained PVP-capped ReS2 nanosheets are evaluated as bimodality contrast agents for computed tomography and photoacoustic imaging. In addition, utilizing the strong near-infrared absorption and ultrahigh photothermal conversion efficiency (79.2%), ReS2 nanosheets could also serve as therapeutic agents for photothermal ablation of tumors with a tumor elimination rate up to 100%. Importantly, ReS2 nanosheets show no obvious toxicity based on the cytotoxicity assay, serum biochemistry, and histological analysis. This work highlights the potentials of ReS2 nanosheets as a single-component theranostic nanoplatform for bioimaging and antitumor therapy. Rhenium disulfide nanosheets, a typical two-dimensional layered transition metal dichalcogenide prepared by a probe sonication-assisted liquid exfoliation approach, were explored as theranostic agents for computed tomography and photoacoustic imaging-guided photothermal therapy.

Published in: "Small".

Tuning the Electronic and Photonic Properties of Monolayer MoS2 via In Situ Rhenium Substitutional Doping

2018-02-16T08:28:40+00:00 February 16th, 2018|Categories: Publications|Tags: , , , |

Abstract Doping is a fundamental requirement for tuning and improving the properties of conventional semiconductors. Recent doping studies including niobium (Nb) doping of molybdenum disulfide (MoS2) and tungsten (W) doping of molybdenum diselenide (MoSe2) have suggested that substitutional doping may provide an efficient route to tune the doping type and suppress deep trap levels of 2D materials. To date, the impact of the doping on the structural, electronic, and photonic properties of in situ-doped monolayers remains unanswered due to challenges including strong film substrate charge transfer, and difficulty achieving doping concentrations greater than 0.3 at%. Here, in situ rhenium (Re) doping of synthetic monolayer MoS2 with ≈1 at% Re is demonstrated. To limit substrate film charge transfer, r-plane sapphire is used. Electronic measurements demonstrate that 1 at% Re doping achieves nearly degenerate n-type doping, which agrees with density functional theory calculations. Moreover, low-temperature photoluminescence indicates a significant quench of the defect-bound emission when Re is introduced, which is attributed to the MoO bond and sulfur vacancies passivation and reduction in gap states due to the presence of Re. The work presented here demonstrates that Re doping of MoS2 is a promising route toward electronic and photonic engineering of 2D materials. This work demonstrates in situ rhenium (Re) doping of synthetic monolayer MoS2 with ≈1 at% Re on r-plane sapphire. Electronic measurements elucidate that 1 at% Re doping achieves nearly degenerate n-type doping, which agrees with density functional theory calculations. Low-temperature photoluminescence measurements reveal suppression of defect emission induced by Re

Published in: "Advanced Functional Materials".

Unraveling the Raman Enhancement Mechanism on 1T′-Phase ReS2 Nanosheets

2018-02-07T08:30:59+00:00 February 7th, 2018|Categories: Publications|Tags: , |

Abstract 2D transition metal dichalcogenides materials are explored as potential surface-enhanced Raman spectroscopy substrates. Herein, a systematic study of the Raman enhancement mechanism on distorted 1T (1T′) rhenium disulfide (ReS2) nanosheets is demonstrated. Combined Raman and photoluminescence studies with the introduction of an Al2O3 dielectric layer unambiguously reveal that Raman enhancement on ReS2 materials is from a charge transfer process rather than from an energy transfer process, and Raman enhancement is inversely proportional while the photoluminescence quenching effect is proportional to the layer number (thickness) of ReS2 nanosheets. On monolayer ReS2 film, a strong resonance-enhanced Raman scattering effect dependent on the laser excitation energy is detected, and a detection limit as low as 10−9m can be reached from the studied dye molecules such as rhodamine 6G and methylene blue. Such a high enhancement factor achieved through enhanced charge interaction between target molecule and substrate suggests that with careful consideration of the layer-number-dependent feature and excitation-energy-related resonance effect, ReS2 is a promising Raman enhancement platform for sensing applications. Here the Raman enhancement mechanism on distorted 1T ReS2 nanosheets is demonstrated, where combined Raman and photoluminescence studies with the introduction of an Al2O3 dielectric layer unambiguously reveal that Raman enhancement on ReS2 materials is from a charge transfer process rather than from an energy transfer process.

Published in: "Small".

Some say, that 2D Research is the best website in the world.