Science China-Physics Mechanics & Astronomy
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2022
·Vol. 65
·期 7
·1-7
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IF 5.203
Guo Hang,Tong Yu,Fan Haibo,Ye Qian,Zhang Jin,Wang Hongyue,Cao Fengren,Li Liang,Wang Hongqiang
Solution-processed perovskite wires are attractive candidates for photodetectors (PDs) due to their simple processibility as well as one-dimensional (1D) geometry with desirable charge carrier transport. However, the performance of the perovskite PDs is generally restricted by the charge carrier transport and extraction efficiency. Herein, we demonstrate that the charge transport and the consequent photodetection performance of MAPbI 3 perovskite wires can be effectively enhanced by incorporating nanocrystals (NCs) of GaAs—a semiconductor with high charge carrier mobility. Taking advantage of the pulsed laser irradiation technique, we successfully fabricate ligand-free GaAs NCs with a size of ∽7 nm and homogeneously embed them in MAPbI 3 perovskite wires through a simple solution-processed synthesis route. Compared with the pristine perovskite wires, the GaAs NCs modulated perovskite wires show improved charge carrier transport with the mobility rising from 1.13 to 3.67 cm 2 V −1 s −1 , and the resultant PD shows significant improvement in responsivity and detectivity. This study provides a new strategy for improving optoelectronic properties of halide perovskite materials and optimizing the device performance.
研究领域:
材料科学
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光电子学
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DOI
高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-9
·
IF 5.578
Lin Shisheng,Li Xiaoqiang,Wang Peng,Xu Zhijuan,Zhang Shengjiao,Zhong Huikai,Wu Zhiqian,Xu Wenli,Chen Hongsheng
MoS 2 is a layered two-dimensional semiconductor with a direct band gap of 1.8 eV. The MoS 2 /bulk semiconductor system offers a new platform for solar cell device design. Different from the conventional bulk p-n junctions, in the MoS 2 /bulk semiconductor heterostructure, static charge transfer shifts the Fermi level of MoS 2 toward that of bulk semiconductor, lowering the barrier height of the formed junction. Herein, we introduce hexagonal boron nitride (h-BN) into MoS 2 /GaAs heterostructure to suppress the static charge transfer and the obtained MoS 2 /h-BN/GaAs solar cell exhibits an improved power conversion efficiency of 5.42%. More importantly, the sandwiched h-BN makes the Fermi level tuning of MoS 2 more effective. By employing chemical doping and electrical gating into the solar cell device, PCE of 9.03% is achieved, which is the highest among all the reported monolayer transition metal dichalcogenide based solar cells.
研究领域:
材料科学
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能源科学
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半导体物理
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
·
IF 7.7
Yusong Zhang,Wei Shi,Huanlin Li,Yifan Li
Although chiral enantiomers have similar physical properties, they often exhibit diametrically opposite pharmacological activities and physiological functions. Therefore, research on its identification, analysis, and optical properties is of critical importance in fields such as biomedicine and life sciences. Current research on chiral substances based on traditional terahertz time-domain spectroscopy (THz-TDS) focuses mainly on absorption spectrum analysis, often neglecting their chiral characteristics and making it difficult to identify chirality. This paper investigates the optical properties of six typical chiral materials using a polarization THz-TDS based on a 2× 2 gallium arsenide photoconductive antenna. The experimental results show that chiral enantiomers exhibit consistent characteristic absorption peaks in the THz band, making it impossible to identify their chirality. Even chiral substances with different molecular structures can exhibit similar absorption peaks due to different vibration modes. The different responses of chiral substances to polarized light make the polarization parameters have molecular configuration sensitivity, and show differences that can be used for chiral recognition between enantiomers and between different chiral substances.
研究领域:
生物医学光学
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分析化学
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太赫兹技术
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分子物理
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DOI
高影响因子
OPTICAL MATERIALS
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2024
·
IF 3.8
Zhi Yang,Shufang Ma,Yu Shi,Xiaodong Hao,Lin Shang,Bin Han,Bocang Qiu,Bingshe Xu
Nanowires (NWs)-based heterojunction photodetectors (PDs) have been widely applied in the fields of remote sensing, night vision, environmental monitoring, and optical communications with high light absorption coefficient and photoelectric conversion efficiency. Here, S-GaAs NWs/Si heterojunction was developed to form a broadband self-powered PDs by growing GaAs NWs on Si substrate through the sulfur-catalyzed assisted chemical vapor deposition (CVD) technology. Compared with the pure GaAs NWs, the sulfur-assisted catalysts could not only inhibit Ostwald ripening of Au seeds to improve the crystalline quality of NWs but also form a thin Ga–S bond passivation layer to reduce surface defects and enhance the optoelectronic performance of the PDs. The fabricated GaAs NWs/Si heterojunction PDs exhibit excellent performances with the large responsivity of 10.3 mA W −1 and high detectivity of 9.59 × 10 12 cm Hz 1/2 W −1 . Additionally, the designed PDs have the broadband wavelength photoresponse from visible to near infrared and fast response speed (rise/fall time of 3.8/21.8 ms). Importantly, the develop strategy of hybrid heterojunction PDs can be extended to other semiconductor materials for facilitating the practical application of high-performance optoelectronic devices .
研究领域:
半导体材料
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纳米电子学
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光电子学
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凝聚态物理
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功能材料
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器件物理
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DOI
高影响因子
Cell Reports Physical Science
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2025
·
IF 7.3
Xiao-Kai Gong,Xiao-Song Zhang,Qian Li,Xing-Yao Zhao,Li-Na Kong,En-Ze Jin,Bao-Zeng Zhou,Jian-Ping Xu,Lan Li
Lead-free perovskites are becoming a focal point in the quest for non-toxic and stable materials for optoelectronic applications. Despite this interest, achieving blue light excitation from the lead-free halide double perovskite Cs 2 AgInCl 6 at room temperature remains a significant challenge, hindering their commercial viability. Here, we address this issue by synthesizing the rare earth lead-free double perovskite Cs 2 Ag 0.6 Na 0.4 In 0.8 Bi 0.2 Cl 6 :Yb, which demonstrates visible/near-infrared (NIR) light emission at 598 and 1,000 nm upon blue light excitation at room temperature. We show that this excitation stems from complex interactions between energy level splitting induced by Yb and self-trapped exciton energy levels. Notably, we observe that under blue excitation, the photoluminescence intensity increases with temperature. Furthermore, Cs 2 Ag 0.6 Na 0.4 In 0.8 Bi 0.2 Cl 6 :Yb is integrated into a blue-light-emitting diode, enhancing the conversion efficiency of GaAs solar cells as a down-shifting layer. Ultimately, this research opens new avenues for developing eco-friendly, efficient materials with significant implications for sustainable technology.
研究领域:
材料科学
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光电子学
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固态物理
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无机化学
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纳米技术
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光子学
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可再生能源
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产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2019
·Vol. 34
·期 4
·781-786
·
IF 0.605
Gao Peng,Chen Lilin,Wu Bo,Zhang Qiming,Xue Chao,Hou Chengyi,Sun Qiang
An optimal structure design of the lattice mismatched GaInP/GaInAs/Ge solar cell with high photoelectric conversion efficiency was proposed. Two-dimensional Bi 2 Te 3 and Sb 2 Te 3 nanosheets were prepared by solvothermal synthesis method used as thermoelectric (TE) functional materials, which is further hybrid with high conductive reduced graphene oxide (rGO) and carbon nanotubes (CNTs). TE film was then fabricated based on above materials. The power factor of the n -type TE film is 19.31 μW/mK 2 , and the power factor of the p -type TE film is 97.40 μW /mK 2 . The flexible TE device was integrated with flexible solar cell. Compared with the single photovoltaic (PV) cell, the efficiency of the as-prepared flexible integrated device measured under the AM1.5 illumination is significantly improved. The efficiency of the two parallel tests is increased from 27.26% and 26.59%, to 29.11% and 28.92%, respectively. The increasing ratio reaches 6.7%–8.8%.
研究领域:
可再生能源
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材料科学
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热电技术
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光伏技术
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纳米科技
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DOI
高影响因子
Journal of Materials Chemistry B
·
2026
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IF 6.2
Ning Wang,Xingzhi Han,Xueying Bai,Zixin Liang,Xinyi Xu,Liuqi Sang,Li Li,Jing Hu,Qun Zhang,Xiaoping Qian
Nanovaccines for co-delivering antigens and adjuvants have demonstrated certain efficacy in cancer immunotherapy. However, these vaccines are challenged by poor biocompatibility, insufficient targeting ability, and attenuated performance in the immunosuppressive tumor microenvironment (TME). In this study, we successfully constructed a cancer cell membrane (CCM)-coated nanovaccine loaded with an active component from traditional Chinese medicine, gambogic acid (GA), using a magnesium/aluminum layered double hydroxide (LDH) as the functional carrier (CCM-LDH@GA). CCM serves as a source of tumor-associated antigens, endowing the nanovaccine with homologous targeting ability and a prolonged circulation time, while the LDH carrier enables efficient loading of GA and facilitates pH-responsive release in the acidic TME, thereby enhancing the therapeutic efficacy of GA while effectively addressing its drawbacks, which include poor solubility, low tumor selectivity, and potential toxicity. In vivo studies in a CT26 colorectal cancer mouse model showed that CCM-LDH@GA exhibits efficient tumor targeting and remodels the immunosuppressive TME by promoting dendritic cell maturation, inhibiting macrophage M2 polarization, and activating T cells, thereby inducing a robust antitumor response. In addition, the combination of the nanovaccine with immune checkpoint inhibitors achieves synergistic therapeutic efficacy with a favorable safety profile. In conclusion, this study presents a robust nanovaccine platform capable of eliciting potent antitumor immunity, demonstrating significant potential for clinical translation in cancer immunotherapy.
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DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Yue Wang,Xuezhong Li,Zihao Lou,Yong-Fang Shi
A new quaternary chalcogenide in A–MIIIA–MIVA–Q System, CsGaGe3S8, was synthesized via a high-temperature solid-state reaction. It crystallizes in the monoclinic system (space group P21/c) and features 2D ∞2 [(Ga/Ge)8S16]²⁻ layers with Cs⁺ ions in the interlayer regions. The material exhibits excellent thermodynamic stability (up to 600 °C) and a broad UV–Vis–IR transmission range (0.33–23 μm), with a band gap of 3.38 eV and birefringence of 0.043 at 546 nm. Compared to AgGaS2, CsGaGe3S8 offers a wider transmission range and larger birefringence, making it a promising candidate for infrared birefringent crystals. First-principles calculations further elucidate its structure-property relationship.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Pengshen Jing,Qian Chen,Haifeng Ke,WenHui Xu,Yanhong Ni,Chun Mao,Runzhi Deng
In the fields of neuroscience and medicine, the accurate capture and quantitative analysis of dopamine (DA) levels in the blood are of great clinical significance for the early diagnosis of neurological dysfunctions and other pathological conditions. In this study, we developed a laccase (La) sensor based on micromotor technology to accurately detect DA content in blood. Firstly, the magnesium-based micromotor was used to endow the sensor with autonomous motion performance, which significantly increased the contact frequency between La and DA molecules in blood. Secondly, the micromotor-loaded Fe 3 O 4 /PPY/La magnetic nanoparticles provide an efficient electrical signal transmission interface for La, while the presence of polypyrrole (PPY) prevented electrode passivation caused by La. In addition, we used magnetic to collect Fe 3 O 4 /PPY/La after capture and tested it by differential pulse voltammetry. Finally, thanks to the excellent catalytic performance and high selectivity of La, the effective recognition and detection of DA in blood samples were realized, and an efficient electrochemical detection method was developed. This innovative detection scheme has a wide linear detection range and high sensitivity, which is expected to provide a more accurate diagnostic tool for health problems related to DA abnormalities, so as to better cope with and prevent related diseases.
研究领域:
神经科学
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医学
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生物传感技术
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产品关联
DOI
PubMed
高影响因子
Asia-Pacific Journal of Chemical Engineering
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2025
·
IF 1.6
Qian Wang,Xinglin Li,Yulin Xie,Lingli Zhou,Lin Chen,Lei Gong,Zhengzhong Zhou
Starch sugars are widely used in various fields, and precise control of their molecular weight may further enhance their application value. This study developed a controllable pore-size enzyme membrane reactor (EMR) to produce starch sugars with target molecular weight. Firstly, polyimide membranes were modified with multiamino compounds to create active sites for subsequent enzyme immobilization. The sieving performance of these modified membranes was analyzed using polyethylene glycol (PEG) of different molecular weights. Next, glutaraldehyde was grafted onto the membrane surface to provide active sites for starch enzyme immobilization. By adjusting the pore size of the EMR, controlled production of starch sugars with specific molecular weights was achieved. Finally, the effects of different operating pressures and flow rates on the sugar production efficiency of the EMR were investigated. This study not only provides guidance for the controlled production of starch sugars but also offers insights into the controllable preparation of EMRs.
研究领域:
生物工程
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食品科学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Hong Zhang,Xin Zhang,Bo Wang,Bo Ren,Xiaodong Yang
Food spoilage leads to plenty of food being wasted every year. Safe and multifunctional food preservation packaging is urgently required to prevent food from contamination. Chitosan/gallic acid/Fe 3+ (CSGA-Fe 3+ ) composite films were synthesized by incorporating gallic acid (GA) and Fe 3+ into a chitosan solution. The integration of GA forms covalent and hydrogen bonds with chitosan, whereas Fe 3+ addition establishes metal-ligand interactions with both chitosan and GA, resulting in a film characterized by a multi-crosslinked network structure. This multi-crosslinked system substantially enhanced the material's mechanical properties and increased resistance to oxidation and ultraviolet degradation. The data indicate that the mechanical strength of chitosan/gallic acid (CSGA) films, with an inclusion of 0.3 mmol of GA, improved by 37.5 % over pure chitosan (CS) films. Moreover, the mechanical strength of the CSGA-Fe 3+ films saw a significant increase of 124.2 %, escalating from 1.32 MPa to 17.72 MPa. Additionally, the free radical scavenging capacities of the CSGA and CSGA-Fe 3+ films rose by 279.4 % and 255.0 %, respectively, compared to the pure CS film. The UV-blocking efficacy of the CSGA-Fe 3+ films, evaluated at 365 nm, reached 84.9 %. The water contact angle of the CSGA-1.5Fe 3+ film increased by 18.08 % compared to the CS film. This study provides innovative ideas to promote the broader application of safe and multifunctional chitosan-based composite films in food preservation packaging.
研究领域:
食品科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Yang Shi,Pei Liu,Zhenluo Yuan,Xiaojiao Wang,Qiuming Peng,Shumin Han,Yanping Fan,Baozhong Liu
The exploitation of high-performance catalysts is essential for practical application of hydrogen production technology by ammonia borane (AB) hydrolysis. In this work, we reported an uncomplicated approach to exploit high-performance catalysts for hydrogen production from AB hydrolysis. Using the reducibility of AB, the Ru 0 /Mo 2 C MXene catalyst was synthesized using Mo 2 C MXene as carrier to hydrogen production from AB hydrolysis. The combination of Mo 2 C MXene and Ru nanoparticles exhibited remarkable catalytic performance. The TOF value was 868.6 min −1 and the hydrogen production rate reached as high as 210,464 mL min −1 g Ru −1 at 298 K. Moreover, the Ru 0 /Mo 2 C MXene catalyst showed good durability and continuously produce hydrogen for more than 4 h with a turnover number (TON) of 41293. Characterization analysis revealed that Mo 2 C MXene regulated the coordination environment of Ru, forming electron-rich Mo 2 C MXene and electron-deficient Ru sites. And excellent catalytic activity is benefiting from the enhanced interaction between Mo 2 C MXene and Ru nanoparticles, promoting the effective activation and dissociation of the reactants, which resulted in the improvement of the performance of AB hydrolysis. This work offers an innovative approach to synthesize efficient AB hydrolysis catalysts for hydrogen production.
研究领域:
材料科学
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催化化学
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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）