CHEMICAL COMMUNICATIONS
·
2025
·
IF 4.2
Shu Li,Chuanhe Ma,Fushuai Li,Jinchun Jiang,Hailong Wang
In this study, we successfully synthesized Cs3MnBr5 films via vapor deposition for the first time using CsBr and MnBr2 raw materials. The optimal deposition temperature is 900°C, achieving a maximum PLQY of 63.5%, an emission peak at 520 nm and a FWHM of 31.9 nm. Additionally, TG and DSC measurements indicate the films possess excellent thermal stability up to 600°C.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Dianyu Jin,Chenxi Huang,Yue Xing,Wenzhe Fu,Wenrui Lai,Li Wang,Hualing Zeng,Kai Wu,Xiang Shao
Two-dimensional (2D) T-phase vanadium disulfide (T-VS 2 ), with its intrinsic ferromagnetism, semi-metallicity, and considerable chemical activity, holds great potential for a variety of applications in catalysis, device integration, and energy storage. However, research on the controlled growth of 2D T-VS 2 has remained limited, particularly deficient in phase control, thickness engineering, and crystallinity optimization. In this study, we systematically explore the influence of growth parameters of a chemical vapor deposition (CVD) method on the synthesis of T-VS 2 nanosheets. Specifically, we observe that properly lowering the growth temperature can facilitate the increase in sheet size, increasing the vanadium precursor concentration effectively manipulates the thickness of the T-VS 2 nanosheets, and prolonged reaction time leads to flipping of the nanosheets. What’s more, the morphology control of T-VS 2 is influenced by temperature, V source supply, and H 2 supply, leading to transitions between trapezoidal, truncated triangular, and hexagonal shapes. By carefully balancing these key parameters, a controllable growth strategy for T-VS 2 can be established. These results are drawn from the growth study on an atomically smooth SrTiO 3 (100) substrate and validated further on the Al 2 O 3 (0001) surface, which registers its scalability and generalizability and hence provides a foundation for the construction of various T-VS 2 -based nanostructures or nanodevices.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 3
·990-996
·
IF 3.442
Yin Hang,Zhang Xudong,Lu Jiangwei,Geng Xuemin,Wan Yanfen,Wu Mingzai,Yang Peng
Chemical vapor deposition (CVD)-grown 2D materials like MoS 2 and WS 2 have been widely used for research and application. Here, we study substrates’ effects on CVD-grown MoS 2 and WS 2 . The morphology, crystalline quality and optical properties have been modified while changing substrates, which can be derived from lattice matching between 2D materials and substrate, defect/impurities on the interface and conductance/transparency of different substrates. The results provide suggestion for further study in CVD growth of 2D materials and device fabrications.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
npj 2D Materials and Applications
·
2017
·Vol. 1
·期 1
·1-8
·
IF 0
Zhu Dancheng,Shu Haibo,Jiang Feng,Lv Danhui,Asokan Vijayshankar,Omar Omar,Yuan Jun,Zhang Ze,Jin Chuanhong
Understanding the microscopic mechanism is fundamental for function-oriented controlled chemical vapor deposition growth of two-dimensional (2D) materials. In this work, we reveal the growth kinetics of 2D MoS 2 by capturing the nucleation seeds, evolving morphology, edge structure, and edge terminations at the atomic scale during chemical vapor deposition growth using the transmission electron microscopy and scanning transmission electron microscopy. The direct growth of few-layer and mono-layer MoS 2 onto graphene-based transmission electron microscopy grids helped us to perform the subsequent transmission electron microscopy characterization without any solution-based transfer. Two seeding centers are observed: (i) Mo-oxysulfide (MoO
x
S 2− y
) nanoparticles either in multi-shelled fullerene-like structures or as compact nanocrystals for the growth of fewer-layer MoS 2 ; (ii) Mo-S atomic clusters. In the early stage growth, irregular polygons with two primary edge terminations, S-Mo Klein edges and Mo zigzag edges, appear approximately in equal numbers. The morphology evolves into a near-triangle shape in which Mo zigzag edges predominate. Results from density-functional theory calculations are consistent with the inferred growth kinetics, and thus support the growth mechanism we proposed. In general, the growth mechanisms found here should also be applicable in other 2D materials, such as MoSe 2 , WS 2 and WSe 2 .
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
Physica Status Solidi-Rapid Research Letters
·
2019
·Vol. 13
·期 7
·1900063
·
IF 3.729
Di Wu,Jiao Shi,Xiaoming Zheng,Jinxin Liu,Weidong Dou,Yongli Gao,Xiaoming Yuan,Fangping Ouyang,Han Huang
One-dimensional (1D) atomically thin crystals have attracted considerable interest due to their unique properties and potential applications. Herein, the chemical vapor deposition (CVD) growth of molybdenum disulfide (MoS 2 ) nanoribbons on sapphire(0001) supported monolayer MoS 2 flakes without catalysts as well as the characterizations by means of Raman and photoluminescence (PL) spectroscopy, optical microscopy (OM), atomic force microscopy (AFM), and scanning transmission electron microscopy (STEM). The Raman and PL results is reported, as well as OM images reveal that such MoS 2 nanoribbons grow on monolayer MoS 2 flakes. STEM and selected area electron diffraction (SAED) results reveal that they are grown along the 〈 10 1 ¯ 0 〉 direction with atomically sharp edges. Controlled experiments show that the deficiency of sulfur vapor at the beginning of growth induced 1D MoO x S 2− x crystals as precursors. The subsequent sulfurization changes them into MoS 2 nanoribbons. These findings provide a facile approach to MoS 2 nanoribbons and enrich the horizon of the preparation of nanostructured transition metal dichalcogenides.
研究领域:
材料科学
·
纳米科技
·
表面科学
·
凝聚态物理
·
低维材料
✓ 已验证
DOI
高影响因子
NANO
·
2019
·
IF 1.293
Hongxiao Zhao,Yong Yan,Xiaohui Song,Aodi Dong,Jian Su,Huimin Jia
Constructing van der Waals (vdW) heterostructures with various-layered two-dimensional (2D) materials is attractive to design various materials and devices. For controllable fabrication of vdW heterostructures, it is very important to make the growth process clear. In this work, SnS 2 /MoS 2 vertical heterostructures were synthesized by the one-step chemical vapor deposition (CVD) method. The bottom MoS 2 triangle layers can be partially or completely covered by SnS 2 layers. The interlayer charge separation was also observed in the heterostructures by photoluminescence (PL) spectroscopy. The growth mechanism of SnS 2 /MoS 2 vertical heterostructures was also discussed for the first time. MoS 2 triangle layers form on the substrates at first and then grow a top layer of SnS 2 . This study will provide an important and practical method, as a guidance to prepare high-quality vertical heterostructures.
✓ 已验证
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Jie Zhang,Tianyu Liu,Liangjie Fu,Gonglan Ye
As an emerging material, exfoliated molybdenum disulfide (MoS 2 ) has an excellent performance in catalysis, electronics and adsorption. However, the application performance of exfoliated MoS 2 is limited by the strong adhesion between MoS 2 layers and the low colloidal stability of MoS 2 in water. In this study, for the first time, nanosized ultrathin MoS 2 was successfully synthesized on exfoliated montmorillonite (MMT) by CVD method. Two reaction mechanisms were found when using flow gas with or without H 2 . The introduction of H 2 promotes the growth of MoS 2 crystals and reduces nucleation density. The MoS 2 /MMT showed excellent performance in dye degradation.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 64
·59816-59822
·
IF 3.289
Song Hao,Bingchu Yang,Yongli Gao
The fracture behavior of two-dimensional polycrystalline molybdenum disulfide (MoS2) films is essential to device performance and has attracted tremendous attention in recent years. Here, we investigate the mixed intergranular and transgranular fracture behaviors of CVD-grown polycrystalline MoS2 atomic layers using multiple techniques. The underlying mechanism is proposed to be that micro-cracks initially nucleate at grain boundary junctions and propagate along with the grain boundaries, resulting in intergranular fracture behavior. On the other hand, as-existed sulfur vacancies serve as crack nuclei and propagate along energy preference directions through Mo–S bond breaking, resulting in transgranular fracture behavior. Lattice shrinking induced compressive, rather than tensile strain is residual in fractured MoS2 microflakes, which enlarges the corresponding bandgap by ∼200 meV. Our work deepens the understanding of the fracture behaviors of polycrystalline MoS2 atomic layers and demonstrates a promising method to engineer the strain in MoS2-like atomically-thin materials to further tune their physical properties.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2017
·Vol. 10
·期 2
·752-757
·
IF 7.367
Xiangling Tian,Rongfei Wei,Shanshan Liu,Yeming Zhang,Jianrong Qiu
We present optical spectroscopy (photoluminescence and Raman spectrum) studies of monolayer transition metal dichalcogenide MoSe2, with spatial location, temperature and excitation power dependence. The investigated spectra show location-dependent behavior with an increase in photoluminescence and Raman intensity and a blue-shift in photoluminescence peak position in the inner region. The observed behaviors of a large shift in the photoluminescence peak position at the edge and biexciton emissions in the inner region confirm that the monolayer MoSe2 crystals grow from nucleation centers during the CVD process. Temperature activated energy and dependence of the peak position are attributed to residual oxygen during the growth. Investigating this information provides a basis for precisely controlling the synthesis of TMDCs and their application in advanced optoelectronics.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
凝聚态物理
✓ 已验证
DOI
高影响因子
Nanoscale Horizons
·
2022
·Vol. 7
·期 7
·743-751
·
IF 11.684
Xing Xin,Jiamei Chen,Yanmei Zhang,Mao-Lin Chen,Youzhe Bao,Weizhen Liu,Yichun Liu,Haiyang Xu,Wencai Ren
The synthesis of large-scale monolayer single-crystal MX2 (M = Mo, W; X = S, Se), a typical transition metal dichalcogenide (TMD), is the premise for their future applications. Compared with insulating substrates such as SiO2 and sapphire, Au is more favourable for the fast growth of TMDs by chemical vapor deposition (CVD). Recently, large-scale single-crystal WX2 was successfully grown and transferred on Au. In sharp contrast, the growth and transfer for monolayer MoX2 is still very challenging, because Au has a higher solubility of Mo and stronger interaction with MoX2 than WX2. Compared with the most studied MoS2, MoSe2 is superior in many aspects because of the narrower band gap and tunable excitonic charging effects. However, the synthesis of large-scale single-crystal MoSe2 on Au has not been reported so far. Here, a pre-alloying CVD method was developed to solve the problems for the growth and non-destructive transfer of MoX2. It has realized the ultrafast growth (30 s) of submillimeter-scale (560 μm) single-crystal MoSe2 for the first time. As-grown samples are strictly monolayers with good optical and electrical properties, which can be easily transferred without sacrificing Au foils by the electrochemical bubbling method. It was found that pre-alloying not only passivates the energetically active sites on Au but also weakens the interaction between Au and MoSe2, which is responsible for the ultrafast growth and easy transfer of MoSe2. This method is also universal for the fast growth and non-destructive transfer of other 2D TMDs.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-9
·
IF 4.259
Wang Xiaodan,Gao Delan,Li Mingji,Li Hongji,Li Cuiping,Wu Xiaoguo,Yang Baohe
The development of electrochemical biosensors for the simultaneous detection of ascorbic acid (AA), dopamine (DA), uric acid (UA), tryptophan (Trp), and nitrite ( \({{\rm{NO}}}_{2}^{-}\) ) in human serum is reported in this work. Free-standing graphene nanosheets were fabricated on Ta wire using the chemical vapor deposition (CVD) method. CVD graphene, which here served as a sensing platform, provided a highly sensitive and selective option, with detection limits of AA, DA, UA, Trp, and \({{\rm{NO}}}_{2}^{-}\) of 1.58, 0.06, 0.09, 0.10, and 6.45 μM (S/N = 3), respectively. The high selectivity of the electrode is here explained by a relationship between the bandgap energy of analyte and the Fermi level of graphene. The high sensitivity in the oxidation current was determined by analyzing the influence of the high surface area and chemical structure of free-standing graphene nanosheets on analyte adsorption capacity. This finding strongly indicates that the CVD graphene electrode can be used as a biosensor to detect five analytes in human serum.
研究领域:
生物医学工程
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2026
·
IF 4.3
Kaitao Chen,Zewen Lin,Rui Huang,Jie Song,Haixia Wu,Li Xia,Zhenxu Lin,Yi Zhang,Hongliang Li,Yanqing Guo,Huihong Lin,Yandan Wu,Danqing Liu,Youming Lu,Paul K. Chu
Uncontrolled crystallization of halide perovskites during chemical vapor deposition (CVD) remains a critical barrier to producing high-performance perovskite films for optoelectronics. Herein, an external electric field is introduced during CVD to precisely regulate CsPbBr 3 film growth. Electric-field-assisted growth leads to suppressed instantaneous supersaturation, elevated nucleation energy barriers, and reduced nucleation density, resulting in the formation of uniform, compact films with significantly enlarged grain sizes. These structural improvements yield a lower trap density, enhanced carrier mobility, and reduced non-radiative recombination compared to the untreated samples. Photodetectors constructed with the optimized films have substantially better optoelectronic properties, manifested by a responsivity of about 62 A/W, a specific detectivity surpassing 10 12 Jones, and a broad linear dynamic range of 118 dB. Moreover, they show a −3 dB bandwidth of ∼250 Hz and significantly faster response time, outperforming devices without electric field assistance. The results reveal a scalable and effective strategy to tailor perovskite crystallization by electric field engineering, enabling the fabrication of high-performance optoelectronic devices.
✓ 已验证
产品关联
DOI
高影响因子
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