Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 34
·10598-10604
·
IF 6.641
Xukun Zhu,Aolin Li,Di Wu,Peng Zhu,Haiyan Xiang,Song Liu,Jian Sun,Fangping Ouyang,Yu Zhou,Xiang Xiong
Crystal phase-engineering of two-dimensional (2D) transition metal dichalcogenides (TMDs) shows remarkable potential for various electronic, optoelectronic and catalytic applications. Here, a few-layer 1T′–2H MoTe2 lateral homo-junction has been obtained by using a facile chemical vapor deposition (CVD) method. In this CVD growth process, the in-plane phase evolution of the MoTe2 film can be dynamically controlled via tuning the contact between the film and Te vapor. Moreover, a local large-scale reversible phase transition of MoTe2 film through heat treatment in a hydrogen atmosphere is reported. During this heat treatment, two types of phase transition from 1T′ to 2H are observed at 500 °C and 750 °C respectively. The mechanism of this reversible phase transition is analysed by first principles calculations. The fabricated 1T′–2H–1T′ homojunction devices demonstrate that the hole mobility of 2H-MoTe2 is comparable with the exfoliated samples. This work in dynamic phase control of MoTe2 provides a pathway to exploring structural transformation of 2D materials and manufacturing novel phase-change electronic devices.
研究领域:
材料科学
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物理化学
·
电子工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yan Sun,Aowen Chen,Jingdao Yang,Kun Zhang,Sikai Wang,Xuerong Xu,Luyue Niu,Yue Jing,Ci Wang,Jing Ren,Jianzhong Zhang
Expanding gain bandwidth into the L-band for erbium-doped fiber amplifiers (EDFAs) is a crucial strategy to overcome limitations in prevalent C-band focused commercial silica-based EDFAs, significantly boosting optical network transmission capacity. Herein, we synthesized Er 3+ -doped broadband near-infrared emission tellurite glasses utilizing the melt quenching process, systematically exploring the impact of ZnCl 2 on the glass structure and optical properties. The 82TeO 2 –3Nb 2 O 5 –15ZnCl 2 –3Er 2 O 3 (TNZ15) glass emerged as a standout candidate for broadband amplifiers around wavelength at 1.55 μm. With escalating ZnCl 2 concentration, a discernible red shift in the emission peak wave lines was observed, accompanied by an expansion of the full width at half maximum (FWHM) from 98 nm to 106 nm. Noteworthy characteristics of all samples included exceptional thermal stability and elevated near-infrared (NIR) transmittance. Application of the Judd-Ofelt (J-O) theory facilitated the calculation of J-O parameter intensity, providing deeper insights into the optical behavior of the materials. Finally, the evaluation of TNZ15 planar optical waveguides, employing the vertical top pumping mode of two 980 nm LEDs, encompassed both the C-band (1530–1565 nm) and the L-band (1565–1625 nm). The results underscore the potential of TNZ15 glass as a promising gain material for broadband optical amplifiers and lasers, offering valuable insights into the development of next-generation optical amplification technologies.
研究领域:
光学材料
·
光通信
·
物理学
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产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·Vol. 13
·期 17
·2500216
·
IF 7.2
Xin Wang,Le-Yang Dang,Xu Zhang,Jia-Qi Zhu,Gui-Gen Wang
Doping can effectively adjust the energy band structure of a semiconductor, thereby influencing its electrical and optical properties. In this study, density functional theory is employed to calculate the crystal structure, electronic configurations, energy bands, and optical properties of tellurium-doped Bi 2 O 2 Se (Bi 2 O 2 Se 1-x Te x ), demonstrating that Te substitution lowers the conduction band, reducing the bandgap. Then 2D Bi 2 O 2 Se 1-x Te x nanosheets are synthesized via organic ion template-guided solution growth method, with Te doping controlled by the Te/Se molar ratio. Optical spectroscopy confirmed that tellurium doping significantly modulates the electronic properties of Bi 2 O 2 Se. When the doping molar concentration is 30%, its bandgap decreases to 0.57 eV. Therefore, Bi 2 O 2 Se 1-x Te x nanosheet-based photodetector demonstrates obvious enhancement of the photoelectric response in the near-infrared region. Notably, Bi 2 O 2 Se 0.7 Te 0.3 photodetector demonstrates broadband photosensitivity across 650–1550 nm, with high responsivity of 32.87 A W −1 and enhanced detectivity of 8.89 × 10 9 Jones at 1060 nm. The device also features a short response time of 16.8/11 µs at 1550 nm. Moreover, the photo-response of the detector shows reliable working stability. Finally, the photodetector is utilized for single-pixel imaging, showcasing its high-contrast infrared light detection capability. These results indicate that Bi 2 O 2 Se 1-x Te x is a promising material for high-sensitivity infrared light detection applications.
研究领域:
材料科学
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凝聚态物理
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光学工程
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2018
·
IF 6.042
Hongyan He,Xiuhong Peng,Ying Yu,Zeming Shi,Mo Xu,Shijun Ni,Ying Gao
Photochemical vapor generation (PVG) is emerging as a promising analytical tool for Te determination, thanks to its efficient matrix separation, and simple and green procedure. However, the low PVG generation efficiency of Te is the bottleneck for its wide application in environmental samples containing trace Te. Herein, we reported a high efficient PVG for Te determination by synergistic effect of ferric ion and nano-TiO2. The analytical sensitivity was enhanced approximately 15-fold for Te(IV) in the presence of both ferric ions and nano-TiO2, comparing to conventional PVG. Besides, the use of nano-TiO2 can provide Te(VI) and Te(IV) an equal and high PVG efficiency in the presence of ferric ions, owned to the high photocatalytic performance of TiO2 under short-wavelength UV irradiation (254 and 185 nm). Under the optimized experimental conditions, a detection limit of 1.0 ng L–1 was obtained. The precision of replicate measurements was 2.3% (RSD, n = 7) at 0.5 μg L–1 for Te(IV). The methodology was validated by successful determination of Te in surface waters and two standard reference sediment samples. To our best knowledge, this is the first report of the synergistic enhancement of transitional metal ions and nano-TiO2 in PVG, which possesses potential for highly sensitive determination of vapor-forming elements.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-12
·
IF 23.655
Yang Peng,Zha Jiajia,Gao Guoyun,Zheng Long,Huang Haoxin,Xia Yunpeng,Xu Songcen,Xiong Tengfei,Zhang Zhuomin,Yang Zhengbao,Chen Ye,Ki Dong-Keun,Liou Juin J.,Liao Wugang,Tan Chaoliang
The growth of high-quality single-crystalline Te nanobelts is reported by introducing atomically flat hexagonal boron nitride (h-BN) nanoflakes into the chemical vapor deposition system as the growth substrate.
The field-effect transistor based on Te grown on h-BN exhibits an ultrahigh hole mobility up to 1370 cm 2 V −1 s −1 at room temperature.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
Device
·
2023
·
IF 0
Haoting Ying,Manzhang Xu,Xiaotong Xu,Liaoyong Wen,Zheng Liu,Xuewen Wang,Xiaorui Zheng,Wei Huang
The ongoing demand for the miniaturization of integrated circuits has incentivized research in low-dimensional semiconductors. Bulk tellurium (Te) naturally contains a 1D atomic chain architecture, but the performance of Te nanodevices is limited by synthesis strategy and lithographic techniques, which hamper their applications in nanoelectronics. In this work, we use non-invasive scanning probe lithography to fabricate high-performing Te field-effect transistors (FETs) using specially synthesized 1D Te nanoribbons. Ambipolar Te conduction is achieved with electron and hole conductivity mobilities exceeding 5 × 10 4 and 1.3 × 10 3 cm 2 V −1 s −1 for temperatures below 80 K, with on/off ratios of over 10 8 and 10 6 , respectively. A p-n diode on a Te homojunction is constructed via a dual-gate configuration with a rectification ratio of over 10 7 . The single Te FET is demonstrated to perform seven basic logic operations, i.e., as an AND, OR, XOR, NOT, NAND, NOR, and XNOR gate.
研究领域:
半导体器件
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纳米电子学
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微电子学
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DOI
Laser & Photonics Reviews
·
2022
·Vol. 16
·期 11
·2200338
·
IF 10.947
Jidong Liu,Qiaoyan Hao,Haibo Gan,Peng Li,Benxuan Li,Yudi Tu,Jingting Zhu,Dianyu Qi,Yang Chai,Wenjing Zhang,Fei Liu
Photodetectors based on two-dimensional (2D) van der Waals heterostructures (vdWHs) have demonstrated great potential in modern nanotechnologies across a wide range of applications. However, due to the severe interface recombination of the photogenerated electron–hole pairs and various absorption edges of constituent layers, they would suffer from low carrier collection efficiency, and the spectral response range of each constituent layer is indistinguishable. Herein, tellurium (Te) nanoflakes with broadband photoresponse are synthesized to construct type-I InSe/Te vdWHs photodetector, which exhibits an ultralow reverse dark current of 3 × 10 −14 A and an ultrahigh current rectification ratio of 10 8 . Moreover, considerable photovoltaic effect of the heterostructure device is observed under illumination, attaining a light on/off ratio of up to 10 5 , a high specific detectivity of 1.77 × 10 11 Jones, and a fast response time of 320 µs. Based on type-I band alignment, the Te layer can collect the photogenerated holes from the InSe layer to suppress the recombination of photogenerated carriers. More importantly, the spectral response of the InSe/Te heterostructure photodetector can be selectively modulated by the InSe layer. This work demonstrates that band alignment engineering of 2D vdWHs holds great potential for developing high-performance self-powered photodetectors.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
SPECTROSCOPY LETTERS
·
2015
·
IF 0.852
Jidong Yang,Shaopu Liu,Linlin Wang,Chenxia Hao,Huiping Gong,Yizhong Shen,Youqiu He
A novel glutathione-capped cadmium telluride quantum dots-based fluorescence “off–on” sensor was designed and applied for highly sensitive and selective monitoring of histidine in aqueous solution. To provide a platform for histidine detection, manganese ion was first employed as an effective quencher to decrease the fluorescence of glutathione-capped cadmium telluride quantum dots because of the binding of manganese ion to glutathione on the surface of quantum dots and the electron transfer from the photoexcited glutathione-capped cadmium telluride quantum dots to manganese ion. Due to its high binding affinity with manganese ion, histidine can make the manganese ion to be dissociated from the surface of glutathione-capped cadmium telluride quantum dots to form more stable complex with histidine in solution, and set free the luminescent glutathione-capped cadmium telluride quantum dots, thereby recovering the fluorescence of glutathione-capped cadmium telluride quantum dots. Experimental results showed that the recovered fluorescence intensity was directly proportional to the concentration of histidine in the range of 0.006 to 465.0 µg mL−1 with a correlation coefficient (R) of 0.9977, and the detection limit (3σ/K) was 1.82 ng mL−1. Relevant experiments also revealed that the fluorescence sensor gives excellent selectivity for histidine over other common amino acids. To further investigate perfect analysis performance, this sensor was utilized to determine histidine in synthetic samples with satisfactory results.
研究领域:
分析化学
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生物医学
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产品关联
DOI
高影响因子
Journal of the American Chemical Society
·
2023
·
IF 15
Ze Chen,Shengnan Wang,Zhiquan Wei,Yiqiao Wang,Zhuoxi Wu,Yue Hou,Jiaxiong Zhu,Yanbo Wang,Guojin Liang,Zhaodong Huang,Ao Chen,Donghong Wang,Chunyi Zhi
Chalcogens, especially tellurium (Te), as conversion-type cathodes possess promising prospects for zinc batteries (ZBs) with potential rich valence supply and high energy density. However, the conversion reaction of Te is normally restricted to the Te2–/Te0 redox with a low voltage plateau at ∼0.59 V (vs Zn2+/Zn) rather than the expected positive valence conversion of Te0 to Ten+, inhibiting the development of Te-based batteries toward high output voltage and energy density. Herein, the desired reversible Te2–/Te0/Te2+/Te4+ redox behavior with up to six-electron transfer was successfully activated by employing a highly concentrated Cl–-containing electrolyte (Cl– as strong nucleophile) for the first time. Three flat discharge plateaus located at 1.24, 0.77, and 0.51 V, respectively, are attained with a total capacity of 802.7 mAh g–1. Furthermore, to improve the stability of Ten+ products and enhance the cycling stability, a modified ionic liquid (IL)-based electrolyte was fabricated, leading to a high-performance Zn∥Te battery with high areal capacity (7.13 mAh cm–2), high energy density (542 Wh kgTe–1 or 227 Wh Lcathdoe+anode–1), excellent cycling performance, and a low self-discharge rate based on 400 mAh-level pouch cell. The results enhance the understanding of tellurium chemistry in batteries, substantially promising a remarkable route for advanced ZBs.
研究领域:
材料科学
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电化学
·
能源存储
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Ling Li,Ningqiang Shi,Xiangqian Jiang,Weiping Chen,Chuncheng Ban,Jiandong Hao
Energy recovery and reuse, industrial waste heat, and thermal energy recovery and conversion in emerging electronic devices are topics of widespread interest. Flexible composite thermoelectric (TE) films have become the key to TE conversion, and many studies and synthesis methods related to them have made great progress. However, little research has been performed on the corresponding composites of typical TE materials with low-dimensional nanotubular materials, particularly modulation of the overall TE properties using doped low-dimensional nanotubular materials. In this work, high-quality bismuth telluride (Bi2Te3) nanowires and boron nitride nanotubes (BNNTs) were prepared using electrolytic deposition and high-temperature catalytic deposition, respectively. Bi2Te3–BNNTs composite films were prepared using a solvent hot pressing method. The Bi2Te3–BNNTs composite film conductivity reached 179.6 S/cm at room temperature (300 K), the corresponding Seebeck coefficient was 171.4 μV/K, and the power factor (PF) was 52.8 nW/mK2. Carbon doping of BNNTs resulted in carbon–boron nitride nanotubes (BCNNTs), and Bi2Te3–BNNTs composite films were prepared. The Bi2Te3–BCNNTs composite films obtained a conductivity of 4629.6 S/cm, at room temperature (300 K), a corresponding Seebeck coefficient of 181.2 μV/K, and a PF of 1520.0 nW/mK2. This study has important reference value for the application of TE conversion. Moreover, the electrical conductivity decreased by no more than 10% after 400 cycles of bending tests, and the electrical conductivity showed signs of recovery after repressing thermally, which undoubtedly proves that Bi2Te3–BCNNTs composite films have good flexibility and thermal stability, and this has contributed to the application and promotion of flexible thermoelectric materials.
研究领域:
材料科学
·
能源工程
·
纳米技术
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产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 22
·5242
·
IF 4.2
Chunlei Li,Shun Li,Long Zhao,Jianming Zhang
Harnessing waste heat from environmental or industrial sources presents a promising approach to eco-friendly and sustainable chemical synthesis. In this study, we introduce a thermoelectrocatalytic (TECatal) system capable of utilizing even small amounts of heat for hydrogen peroxide (H2O2) production. We developed a nanohybrid structure, combining carbon nanotubes (CNTs) and Bi2Te3nanoflakes (Bi2Te3/CNTs), through a one-pot synthesis method. Bi2Te3, as a thermoelectric (TE) material, generates charge carriers under a temperature gradient via the Seebeck effect, enabling them to participate in surface redox reactions. However, the rapid recombination of these charge carriers greatly limits the TECatal activity. In the Bi2Te3/CNTs nanohybrid system, the introduction of CNTs substantially enhances the efficiency of H2O2production, as the strong bonding between CNTs and Bi2Te3, along with the excellent conductivity of CNTs, facilitates charge carrier separation and transport, as confirmed by TE electrochemical tests. This study underscores the significant potential of thermoelectric nanomaterials for converting waste heat into green chemical synthesis.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Dewei Ma,Panli Zhu,Jun Huang,Xiuhua Cao
The research on low-temperature lead-free glass is of great significance for the miniaturization, integration and intelligence of current electronic products, as well as environmental protection. In this article, we report the preparation of low-temperature lead-free B 2 O 3 -BaO-ZnO-SiO 2 -Al 2 O 3 -TeO 2 glasses by a melt-quenching technique. With the increase of TeO 2 content in glass, the glass transition temperature and melting temperature of sintered glass powder decrease, while its wettability and acid corrosion resistance show an increasing trend. The application of glass powder in the sintering experiment of terminal electrode slurry further proves this viewpoint. Compared with the poor sintering performance of the slurry with TeO 2 -free glass powder, the slurry containing TeO 2 glass powder forms a very dense sintered solid, and the sintered slurry is tightly bonded to the ceramic substrate .
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）