ACS Applied Nano Materials
·
2025
·
IF 5.5
Tengfei Wang,Qing Pang,Boyu Liu,Hongyu Wang
In recent years, molybdenum diselenide (MoSe2) nanomaterials have been proven to be promising electromagnetic wave (EMW) absorbers, attributed to the formation of a heterogeneous interface between the 2H semiconductor phase and the 1T metal phase during its preparation. However, the difficulty in precisely controlling the two-phase ratio and the complexity of the process hinder its further development. In this work, we constructed a simple phase engineering strategy based on the regulation of reducing agent concentration, achieving a regulation of the 1T phase proportion in defective 1T/2H-MoSe2 nanomaterials (ranging from 67.91 to 41.45%) by accurately adjusting the amount of NaBH4 added. The findings indicate that the material exhibits excellent microwave absorption performance when the 1T phase proportion reaches 53.55% (1T/2H-MoSe2-2), demonstrating a minimum reflection loss (RLmin) of −40.0 dB, and the effective absorption bandwidth (EAB) covers 6.08 GHz (11.92–18.0 GHz) when the thickness is 2.6 mm. The enhancement in performance results from a synergistic balance mechanism established by the abundant 1T-2H heterogeneous interface, which induces interfacial polarization loss, along with a moderately enhanced conductive loss in the 1T/2H-MoSe2-2 nanomaterial. Furthermore, radar cross-section (RCS) simulation results confirm the dramatic dissipation ability of absorbers for EMW in practical applications. This strategy paves the way for designs of interfaces and the control of the performance of absorbing nanomaterials based on transition-metal dichalcogenides (TMDs).
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zhiwei Wang,Xiang Zhao,Fangzhen Hong,Hao Wang,Heng Lei,Zhiming Chou,Jiandong Zheng
The development of room-temperature (RT) formaldehyde sensors is significant for indoor air quality monitoring. In this contribution, titanium (Ti)-incorporated 1T/2H molybdenum disulfide (MoS2) phase heterostructures were prepared via a facile hydrothermal method. Compared with 1T/2H MoS2, the as-prepared 1T/2H Mo1–xTixS2 nanosheets showed a boosted RT formaldehyde sensing performance, which was attributed to the enhanced gas adsorption and charge transfer processes induced by Ti incorporation and could be regulated by tuning the Mo/Ti ratio in Mo1–xTixS2. In addition, the Ti-incorporated phase heterostructures with an optimized 1T concentration showed further improved gas-sensing properties compared to the highly metallic or semiconducting nanosheets with the same chemical composition, which exhibited an obvious response of 0.035% to 1 ppm formaldehyde with an excellent limit of detection as low as 39 ppb, good repeatability, and short response and recovery times. Moreover, flexible gas sensors based on the optimized nanosheets showed well-maintained responses under moderately bent conditions. Our findings demonstrate that the creation of phase heterostructures with tunable compositions and phases may provide more opportunities to tailor their sensing properties.
研究领域:
材料科学
·
环境监测
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MICROENCAPSULATION
·
2016
·
IF 1.631
Xunan Zhang,Wei Zong,Ying Hu,Nan Luo,Wenlong Cheng,Xiaojun Han
In order to increase the loading efficiency of drug carriers, here we demonstrated a microfluidic method to fabricate an asymmetric vesicle, which contains trichloro(1H,1H,2H,2H-perfluoroocty-l)silane (TPS) inner leaflet and lipid outer leaflet. The asymmetric vesicle was characterised by fluorescence microscopy and Fourier transform infra-red spectrum. In vitro cytotoxicity of the vesicles carrying 5-fluorouacil (5-FU) has also been studied.
研究领域:
药学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Cheng Li,Jing Liu,Hua Zhang,Luwei Zou,Xilong Zhou,Jialong Li,Zhihui Chen,Xiao Wang,Weigao Xu,Zheng Peng,Xiaolong Chen,Yu Zhou
Two-dimensional photovoltaic-type devices operate by artificially stacked heterostructures with atomically thin p-n junctions or non-centrosymmetric layers, in which photogenerated carriers are separated under built-in or internal electric fields. However, their photocurrent conversion efficiency is restricted by small electric field strength and large carrier recombination, which poses a major limitation with the requirement of specific 2D materials. Herein, large-area centrosymmetric 2H-stacked bilayer MoS 2 with low defect density was synthesized by slow-kinetic chemical vapor deposition and showed a remarkable photovoltaic response (0.13 mA/W at 520 nm) with a small vertical barrier of 23.2 mV. The local energy levels and doping effects derived from Raman spectroscopy and Kelvin probe force microscopy revealed the resulting sharp slope of interfacial band bending, which explains the efficient separation of photogenerated carriers by precise work function differences. A higher asymmetric barrier of 139.6 mV resulted in enhanced photocurrents in the 405–1064 nm and achieved a maximum responsivity of 0.51 mA/W at 520 nm as well as a consistent six-fold enhancement at 638 nm (0.04 to 0.24 mA/W). Our research reveals an enhanced physical mechanism with low-defect-density centrosymmetric 2D materials as photovoltaic-type layers by tuning interfacial barriers for optoelectronic devices.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2024
·
IF 2.4
Nazeer Sana,Han Jingwei,Qi Junjie
Due to the fact that fossil fuels are limited and the world’s energy demand is rising, economic catalysts with exceptional stability and efficiency must be produced right now. MoS 2 ’s successfully increased catalytic activity by interfacial coupling and phase engineering. The 1T/2H-MoS 2 /Ni 3 S 2 composite was effectively created in this study by adding Ni 3 S 2 material on top of 1T/2H-MoS 2 (Mo: S = 1:4). The effects of varying concentrations of Ni 3 S 2 on hydrogen evaluation reaction characteristics are examined using the hydrothermal technique. The composite sample with an appropriate amount of Ni 3 S 2 has the best hydrogen evolution performance when compared to samples with other amounts of Ni 3 S 2 . The sample’s overpotential at 1 M KOH is 124 mV at 10 mAcm −2 , and its Tafel slope is 138.0 mVdec −1 . In addition, the sample exhibits good air stability and hydrogen evolution stability. Also, to accelerate the kinetics of hydrogen evolution and encourage H 2 O dissociation in an alkaline environment, Ni 3 S 2 efficiently stimulates MoS 2 ’s inert base surface, creates a rich coupling boundary, and greatly enhances the performance of electrocatalytic hydrogen evolution. Graphical abstract
研究领域:
材料科学
·
电化学
·
催化作用
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2026
·
IF 17.3
Xuwu Xiao,Cheng Cheng,Cuizhi Chen,Lituo Zheng,Dong Wei,Mingdeng Wei,Zhensheng Hong
Photobatteries promise a revolutionary approach to both harvesting and storing solar energy; however, their development has been limited by rapid carrier recombination and the absence of interfaces to direct charge flow effectively. Here, we construct an in-plane 1T/2H-MoS2 heterostructure chemically connected onto carbon nanotubes (CNTs) that integrate metallic 1T-MoS2, semiconducting 2H-MoS2, and conductive CNTs into a multi-interface framework. This architecture generates a built-in electric field across the 1T/2H-MoS2 junction and provides continuous directional pathways for rapid electron extraction and transfer. Ultrafast transient absorption spectroscopy identifies long-lived charge-separated states with a prolonged carrier lifetime (τ2 ≈ 731 ps) in the 1T/2H-MoS2 heterostructure, more than double that of 2H-MoS2@CNTs. Meanwhile, Kelvin probe force microscopy reveals a pronounced light-induced potential gradient (∼75 mV), providing direct nanoscale evidence of efficient carrier extraction. These synergistic effects promote efficient charge separation and transport, enabling superior photoassisted lithium-ion storage. The 1T/2H-MoS2@CNTs-based lithium-ion photobattery demonstrates an increased storage capacity from 493.7 to 624.9 mAh g–1 at 0.5 A g–1 under illumination and a maximum photoconversion and storage efficiency of 6.62%, achieving an external voltage-free self-charging process. This study underscores rational multi-interface engineering to effectively integrate light harvesting and electrochemical storage for self-charging energy systems.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Jiahao Yao,Haiyang Liu,Qingming He,Kai Chen,Yaping Wu,Xu Li,Chunmiao Zhang,Zhiming Wu,Junyong Kang
Two-dimensional (2D) 2H-1 T′ heterojunctions based on transition-metal dichalcogenides have attracted great attention due to their special interface structures and novel properties. Understanding the growth mechanism and the interface structures is essential for their controllable growth. In this work, we successfully synthesize lateral and vertical MoS 2 /ReS 2 heterojunctions by using a two-step chemical vapor deposition (CVD) method, and deeply explore the evolution of the structure. It is found that the growth mode of heterojunction undergoes a transition from lateral epitaxy to vertical stacking under a high Re/S ratio during the growth. Furthermore, the interface structure is greatly determined by the edge shape of MoS 2 core. Two kinds of structures, with the b-axis of 1 T′ ReS 2 shell parallel to the (1 0 0) and (0 1 0) plane of MoS 2 core respectively, are observed. Meanwhile, by comparing with MoS 2 monolayer, MoS 2 /ReS 2 heterostructures possess a reduced emission intensity due to the carrier transfer. This work provides a robust and controllable strategy for the synthesis of heterostructures with different phase structures.
研究领域:
材料科学
·
纳米技术
·
凝聚态物理
·
半导体器件
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 9
·6015-6024
·
IF 3.9
Li Zhi-Yue,Li Long-Xiang,Xie Yi-Qin,Sun Hui,Lu Si-Rong,Bao Chun-Hao,Zhang Han,Chen Ting-Yong
Two-dimensional materials are attractive in electronics, energy and optics due to their fascinating physical properties. Appropriate fabrication methods and optimized process parameters are critical for improving crystal quality and achieving precise control over the structure and properties of these materials. Here, 2H-NbSe 2 single crystals were synthesized via a chemical vapor transport (CVT) process using iodine as the transport agent in a dual-zone tube furnace. The structural, chemical compositions, electrical, and magneto-transport properties of the synthesized crystals were comprehensively investigated. X-ray diffraction (XRD) and transmission electron microscopy (TEM) confirmed that the crystals were well-crystallized in a single-phase hexagonal lattice configuration, consistent with the typical van der Waals layered characteristics. The Raman spectra displayed characteristic peaks for NbSe 2 . The atomic ratio of Nb: Se in the crystals was approximately 1:2. The residual resistivity ratio ( RRR ) value (18), transition temperature ( T C ≈ 7 K) and transition width (Δ T ) of 0.26 K obtained from temperature-dependent resistance measurements indicate good crystal quality. Magneto-transport measurements revealed a distinct anisotropy between in-plane and out-of-plane magnetic field directions, resulting in typically different upper critical fields ( H c 2 ). This work presents a straightforward and effective iodine-assisted CVT method for growing high-quality NbSe₂ crystals, offering fundamental and technological significance for the growth and application of two-dimensional materials.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Changjiang Nie,Mingming Yin,Ye Zhao,Chuanwen Zhao,Butian Zhang,Xinxin Song,Xin Yi,Youwei Zhang,Liang Luo,Shun Wang
Two-dimensional layered MoS2 has attracted tremendous attention because of its unique physical and chemical properties and promising application prospects. To further expand its applications to areas such as gas sensing, biosensing, drug delivery, and photothermal therapy, surface functionalization has been employed to engineer its properties according to multiple perspectives. Herein, we demonstrate a scalable surface modification method to generate functionalized MoS2 flakes by the step-by-step covalent assembly of lipoic acid (LA) and fluorescein isothiocyanate (FITC) molecules. In our approach, reactive disulfide-containing LA molecules were first chemically bonded to the sulfur vacancies (SVs) of MoS2 surfaces. FITC was then linked to MoS2 through LA by a condensation reaction between the amino group of FITC and the carboxyl group of LA. It was demonstrated that the initial LA functionalization enhanced the electronic mobility via the filling of SVs, and the second-step functionalization with FITC induced electron doping of MoS2. Moreover, the covalent attachment of FITC decorated the PL spectrum of MoS2 with an additional green fluorescence at ∼530 nm. This strategy is a universal route to construct a versatile platform for chemical modification of functional groups and provides new opportunities of controlling the electronic and optical properties of transition-metal dichalcogenides.
研究领域:
材料科学
·
化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
CHINESE CHEMICAL LETTERS
·
2021
·Vol. 33
·期 5
·2611-2616
·
IF 6.779
Lin Wang,Xinzhe Li,Chengjie Pei,Cong Wei,Jie Dai,Xiao Huang,Hai Li
The properties of two-dimensional (2D) materials are highly dependent on their phase and thickness. Various phases exist in tin disulfide (SnS 2 ), resulting in promising electronic and optical properties . Hence, accurately identifying the phase and thickness of SnS 2 nanosheets is prior to their optoelectronic applications . Herein, layered 2H-SnS 2 and 4H-SnS 2 crystals were grown by chemical vapor transportation and the crystalline phase of SnS 2 was characterized by X-ray diffraction, ultralow frequency (ULF) Raman spectroscopy and high-resolution transmission electron microscope . As-grown crystals were mechanically exfoliated to single- and few-layer nanosheets , which were investigated by optical microscopy, atomic force microscopy and ULF Raman spectroscopy . Although the 2H-SnS 2 and 4H-SnS 2 nanosheets have similar optical contrast on SiO 2 /Si substrates, their ULF Raman spectra obviously show different shear and breathing modes, which are highly dependent on their phases and thicknesses. Interestingly, the SnS 2 nanosheets have shown phase-dependent electrical properties. The 4H-SnS 2 nanosheet shows a current on/off ratio of 2.58 × 10 5 and excellent photosensitivity, which are much higher than those of the 2H-SnS 2 nanosheet. Our work not only offers an accurate method for identifying single- and few-layer SnS 2 nanosheets with different phases, but also paves the way for the application of SnS 2 nanosheets in high-performance optoelectronic devices .
研究领域:
材料科学
·
凝聚态物理
·
纳米科技
·
光电子学
·
表面与界面科学
✓ 已验证
DOI
高影响因子
ACS Nano
·
2024
·
IF 15.8
Jin Wang,Jia Han,Shu Chen,Jie Li,Yangzhou Wang,Chuanyi Wu,Qianshuo Wang,Zihan Wang,Fei Chen,Wen Wan
van der Waals-layered niobium diselenide (NbSe2) intercalated by d-electron transition metals is an ideal test bed for the exploration of their diversiform evolution of ground states. These intercalations are mostly viewed as ordered structures aligned with periodicities of their host materials that enable control of the electronic phases via gradually changing of intercalation ratios. Here, we present the structure and superconductivity in tungsten (W)-intercalated 2H-NbSe2 crystals, which reveals an order to disorder distribution of W atoms with increasing confined intercalating amounts, leading to an approximate V-shape suppression of superconductivity. Aided by density functional theory calculations, we demonstrate that the local magnetic moment around W intercalants induced by the charge redistribution gives rise to the quick superconductivity suppression in 2H-NbSe2 below a certain dilute amount (W% = 0.06). Simultaneously, W intercalants also induce structural aberration due to aggregation effects and inhibit the generation of an ordered structure in 2H-NbSe2, resulting in a recovery of its superconductivity. The alteration of structure and electronic phases in 2H-NbSe2 via intercalation of nonmagnetic transition metals in the van der Waals gap enables the exploration of combined magnetic quantum criticality, superconductivity, and other related electronic correlations.
研究领域:
凝聚态物理
·
材料科学
·
超导物理
·
量子材料
·
电子结构理论
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Zhijun Wang,Yingjing Liu,Yao Deng,Hailei Wang,Shuting Han,Yinfeng Wang,Xiaoxue Zhang,Xuexia Liu
Noble metals offer a wide range of potential catalysis applications, particularly in fuel cells and supercapacitors. The decoration strategy is a promising efficient strategy to address the limited structural flexibility and enhance the performance of noble metal electrode materials. Herein, we report a facile method to synthesize the nanocomposites with Pt nanoclusters (NCs) decorated on the surface of 2H-MoS2 nanosheets (Pt NCs@2H-MoS2). Fortunately, Pt NCs@2H-MoS2 demonstrates excellent catalytic activity and stability toward the hydrogen evolution reaction (HER) in alkaline solutions, along with satisfactory electrochemical characteristics for supercapacitors (SCs). Specifically, a low overpotential of 61.2 mV at 10 A g–1 and 98% retention after 10 h can be achieved for the HER, which is comparable to the commercial Pt/C catalysts. When used as electrode materials for supercapacitors, a high specific capacitance of 284 F g–1 can be achieved at a scan rate of 5 mV s–1 in 1 M KOH. Consequently, these results demonstrate that the noble metal-decorated transition metal materials strategy offers significant potential for economically and sustainably electrochemical applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）