Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Zhou Jun,Zhang Guitao,Wang Wenhui,Chen Qian,Zhao Weiwei,Liu Hongwei,Zhao Bei,Ni Zhenhua,Lu Junpeng
Multiple structural phases of tellurium (Te) have opened up various opportunities for the development of two-dimensional (2D) electronics and optoelectronics. However, the phase-engineered synthesis of 2D Te at the atomic level remains a substantial challenge. Herein, we design an atomic cluster density and interface-guided multiple control strategy for phase- and thickness-controlled synthesis of α -Te nanosheets and β -Te nanoribbons (from monolayer to tens of μm) on WS 2 substrates. As the thickness decreases, the α -Te nanosheets exhibit a transition from metallic to n-type semiconducting properties. On the other hand, the β -Te nanoribbons remain p-type semiconductors with an ON-state current density (I ON ) up to ~ 1527 μA μm −1 and a mobility as high as ~ 690.7 cm 2 V −1 s −1 at room temperature. Both Te phases exhibit good air stability after several months. Furthermore, short-channel (down to 46 nm) β -Te nanoribbon transistors exhibit remarkable electrical properties (I ON = ~ 1270 μA μm −1 and ON-state resistance down to 0.63 kΩ μm) at V ds = 1 V.
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Nature Communications
·
2018
·Vol. 9
·期 1
·1-10
·
IF 12.353
Wen Xixing,Chen Chao,Lu Shuaicheng,Li Kanghua,Kondrotas Rokas,Zhao Yang,Chen Wenhao,Gao Liang,Wang Chong,Zhang Jun,Niu Guangda,Tang Jiang
Antimony selenide is an emerging promising thin film photovoltaic material thanks to its binary composition, suitable bandgap, high absorption coefficient, inert grain boundaries and earth-abundant constituents. However, current devices produced from rapid thermal evaporation strategy suffer from low-quality film and unsatisfactory performance. Herein, we develop a vapor transport deposition technique to fabricate antimony selenide films, a technique that enables continuous and low-cost manufacturing of cadmium telluride solar cells. We improve the crystallinity of antimony selenide films and then successfully produce superstrate cadmium sulfide/antimony selenide solar cells with a certified power conversion efficiency of 7.6%, a net 2% improvement over previous 5.6% record of the same device configuration. We analyze the deep defects in antimony selenide solar cells, and find that the density of the dominant deep defects is reduced by one order of magnitude using vapor transport deposition process.
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Frontiers of Environmental Science & Engineering
·
2024
·Vol. 18
·期 11
·1-13
·
IF 6.1
Chen Yuchao,Dong Kun,Zhang Yiming,Zheng Junjian,Jiang Minmin,Wang Dunqiu,Zhang Xuehong,Huang Xiaowu,Zhou Lijie,Li Haixiang
The slow growth rate of autotrophic bacteria and regulation of biofilm thickness are critical factors that limit the development of a hydrogen-based membrane biofilm reactor (H 2 -MBfR). The acyl-homoserine lactone (AHL) mediated quorum sensing (QS) system is a crucial mechanism regulating biofilm behavior. However, the AHLs that promote biofilm formation in autotrophic denitrification systems and their underlying mechanisms, remain unclear. This study explored the impact of AHL-mediated QS signaling molecules on biofilm development in H 2 -MBfR. This study revealed that C 14 -HSL and C 4 -HSL are potential signaling molecules that enhanced biofilm formation in long-term stable operating H 2 -MBfR. Subsequent short-term experiments with C 14 -HSL and C 4 -HSL confirmed their ability to increase bacterial adhesion to carrier surfaces by promoting the production of extracellular polymeric substances (EPS). Functional gene annotation indicated that exogenous C 14 -HSL and C 4 -HSL increased the abundance of signal transduction (increased by 0.250%–0.375%), strengthening the inter bacterial QS response while enhancing cell motility (increased by 0.24% and 0.21%, respectively) and biological adhesion (increased by 0.044% and 0.020%, respectively), thereby accelerating the initial bacterial attachment to hollow fiber membranes and facilitating biofilm development. These findings contribute to the understanding of microbial community interactions in H 2 -MBfRs and provide novel approaches for biofilm management in wastewater treatment systems.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 24
·11013-11025
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IF 4.682
Luo Guoqiang,Li Peibo,Hu Jianian,Guo Jingwei,Sun Yi,Shen Qiang
The purpose of this paper was to design an Al–Cu–Ag–C material system to address the deterioration of mechanical properties caused by intermetallic compounds generated during Al–Cu sintering. The in situ pyrolytic C layer was encapsulated on the surface of the raw material particles, which prevented Al–Cu diffusion and reduced the generation of intermetallic compounds. The microstructure of the Al–Cu–Ag–C composites illustrates that several alloy phases of Al 2 Cu, Al 4 Cu 9 , and Ag 2 Al are formed. The addition of Ag significantly improved the mechanical properties of the composite due to the formation of the Ag 2 Al phase and Cu–Ag solution. The tensile strength and compressive strength of Al–52Cu–3Ag–C are increased by 123.9% and 64.9% over Al–52Cu–C, and the strain is also considerably improved. The strength enhancement derived from the Orowan strengthening contributed by Ag 2 Al, and the solid solution strengthening contributed by Ag–Cu solid solution, respectively. The presence of Ag 2 Al also enhances the hardness of the composite.
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CHINESE JOURNAL OF POLYMER SCIENCE
·
2022
·Vol. 40
·期 10
·1165-1172
·
IF 3.815
Liu Chang-Xu,Duan Li-Jie,Yan Nan,Jiang Wei
The hybrid Janus nanomaterials have captured considerable attention since the asymmetric structure can combine the properties of each component and display synergistic applications. However, the precise design of the specific hybrid Janus nanostructures still remains a formidable challenge. Here, we for the first time report the fabrication of novel and highly uniform inorganic/organic hybrid Janus nanotubes via disassembling the mesoporous inorganic nanoparticles (NPs)/polystyrene-block-poly(4-vinylpyridine) (PS- b -P4VP) hybrid sheets, which are generated through the in situ reduction of functional metal precursors on the prepared PS- b -P4VP mesoporous scaffolds. More importantly, the internal pore size of the hybrid Janus nanotubes can be precisely tuned by readily controlling the swelling time of the PS- b -P4VP sheet-like assemblies in a selective solvent for P4VP domains, thus generating the particular inorganic/organic hybrid Janus nanotubes with adjustable inner diameter size. We believe that our finding will provide an efficient and universal route to fabricate the particular inorganic/organic hybrid nanotubes for hierarchical functional devices and nanomaterials.
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npj Quantum Materials
·
2020
·Vol. 5
·期 1
·1-8
·
IF 6.562
Cheng Erjian,Xia Wei,Shi Xianbiao,Yu Zhenhai,Wang Lin,Yan Limin,Peets Darren C.,Zhu Chuchu,Su Hao,Zhang Yong,Dai Dongzhe,Wang Xia,Zou Zhiqiang,Yu Na,Kou Xufeng,Yang Wenge,Zhao Weiwei,Guo Yanfeng,Li Shiyan
Topological nodal-line semimetals (TNLSMs) are materials whose conduction and valence bands cross each other, meeting a topologically protected closed loop rather than discrete points in the Brillouin zone (BZ). The anticipated properties for TNLSMs, include drumhead-like nearly flat surface states, unique Landau energy levels, special collective modes, long-range Coulomb interactions, or the possibility of realizing high-temperature superconductivity. Recently, SrAs 3 has been theoretically proposed and then experimentally confirmed to be a TNLSM. Here, we report high-pressure experiments on SrAs 3 , identifying a Lifshitz transition below 1 GPa and a superconducting transition accompanied by a structural phase transition above 20 GPa. A topological crystalline insulator (TCI) state is revealed by means of density functional theory (DFT) calculations on the emergent high-pressure phase. As the counterpart of topological insulators, TCIs possess metallic boundary states protected by crystal symmetry, rather than time reversal. In consideration of topological surface states (TSSs) and helical spin texture observed in the high-pressure state of SrAs 3 , the superconducting state may be induced in the surface states, and is most likely topologically nontrivial, making pressurized SrAs 3 a strong candidate for topological superconductor.
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Cell Death Discovery
·
2024
·Vol. 10
·期 1
·1-11
·
IF 6.1
Zheng Guopei,Shi Jiahao,Li Qian,Jin Xiaoliang,Fang Yan,Zhang Zhe,Cao Qin,Zhu Lili,Shen Jianfeng
BRCA1-associated protein 1 (BAP1) acts as a tumor suppressor and can affect the cell cycle, tumor immunity, and cellular metabolism through multiple pathways. In melanoma, BAP1 mutations promote tumor cell glycolysis, leading to increased lactate production. The tumor microenvironment with high lactate levels is often associated with immunosuppression and tumor progression. The inhibitory effect of BAP1 on glycolysis has been found in a variety of tumors, but the specific mechanism by which BAP1 inhibits lactate production still needs to be elucidated. In this study, we show that BAP1 can interact directly with lactate dehydrogenase (LDHA), causing LDHA to accumulate in the nucleus. Conversely, BAP1 deletion leads to the accumulation of LDHA in the cytoplasm, catalyzing the production of lactate from pyruvate that results in increased lactate levels inside and outside the cell. By elucidating the interaction between BAP1 and LDHA and the subsequent effects on lactate production in melanoma cells, this work provides insights into the mechanism of BAP1-mediated metabolic regulation. Furthermore, it may provide novel directions for the clinical treatment of BAP1-mutant melanoma.
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PubMed
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Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-12
·
IF 12.264
Chen Zhe,Wang Panpan,Ji Zhenyuan,Wang Hua,Liu Jie,Wang Jiaqi,Hu Mengmeng,Huang Yan
A 2.4 V high-voltage flexible aqueous ZIB was fabricated, and superiors performances were achieved: extremely flat charging/discharging voltage plateaus (1.9/1.8 V), the smallest plateau voltage gap of 0.1 V, high energy density of 120 Wh kg −1 , high power density of 3700 W kg −1 , and excellent rate capability of 25 C.
The battery posed application potential in wearable electronics with extreme safety against tough destructions including hammering, sewing, punching, and soaking.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2016
·Vol. 18
·期 9
·1-10
·
IF 2.101
Zhong Benbin,Zu Xihong,Yi Guobin,Huang Hailiang,Zhang Minghai,Luo Hongsheng
In this paper, well-ordered Au nanoparticle arrays on silicon substrates were employed as efficient metal-enhanced fluorescence (MEF) substrates for investigating the fluorescence properties of the conjugated polymer poly(3-hexylthiophene) (P3HT). The ordered Au nanoparticle arrays were fabricated by block copolymer self-assembly technology, and the particle sizes were controlled by adjusting the molar ratios of HAuCl 4 precursor to vinyl pyridine units. The approach is economical and suitable to fabricate large-area MEF substrates. The results about fluorescence properties of P3HT showed that the fluorescence intensities of the P3HT films were improved on ordered Au nanoparticle arrays compared to those on bare silicon substrate and were significantly enhanced with the Au nanoparticle sizes increasing. The mechanism is based on localized surface plasmon resonances, coupling and propagating surface plasmons, and the emission enhancement mainly resulted from the increase of the excitation rate. This work provides a new way to prepare efficient MEF substrates for high-performance fluorescence-based devices.
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JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY
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2016
·
IF 3.031
Xiaobo Xie,Zhenpeng Wang,Yafeng Li,Lingpeng Zhan,Zongxiu Nie
A liquid sampling-atmospheric pressure afterglow microplasma ionization (LS-APAG) source is presented for the first time, which is embedded with both electrospray ionization (ESI) and atmospheric pressure afterglow microplasma ionization (APAG) techniques. This ion source is capable of analyzing compounds with diverse molecule weights and polarities. An unseparated mixture sample was detected as a proof-of-concept, giving complementary information (both polarities and non-polarities) with the two ionization modes. It should also be noted that molecular mass can be quickly identified by ESI with clean and simple spectra, while the structure can be directly studied using APAG with in-source oxidation. The ionization/oxidation mechanism and applications of the LS-APAG source have been further explored in the analysis of nonpolar alkanes and unsaturated fatty acids/esters. A unique [M + O – 3H]+ was observed in the case of individual alkanes (C5–C19) and complex hydrocarbons mixture under optimized conditions. Moreover, branched alkanes generated significant in-source fragments, which could be further applied to the discrimination of isomeric alkanes. The technique also facilitates facile determination of double bond positions in unsaturated fatty acids/esters due to diagnostic fragments (the acid/ester-containing aldehyde and acid oxidation products) generated by on-line ozonolysis in APAG mode. Finally, some examples of in situ APAG analysis by gas sampling and surface sampling were given as well.
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MICROCHIMICA ACTA
·
2023
·Vol. 191
·期 1
·1-8
·
IF 5.7
Che Dou,Cao Xitao,Chen Chong,Yan Hui
The rapid detection of Pseudomonas aeruginosa ( P. aeruginosa ) is of great significance for the diagnosis of medical infection. In view of the above, a novel aptasensor based on fluorescence resonance energy transfer (FRET) was developed. It contained aptamer-coupled upconversion nanoparticles (UCNPs-apt) as a donor (excitation 980 nm) and molybdenum disulfide (MoS 2 ) nanosheets as an acceptor. The upconversion fluorescence aptamer system was investigated to obtain the optimal parameters of MoS 2 concentration, the incubation time of UCNPs-apt/MoS 2 and P. aeruginosa , and pH. Based on the optimal parameters, a linear calibration equation (emission 654 nm) with a wide detection range 8.7 × 10 ~ 8.7 × 10 7 cfu/mL, a high coefficient of determination R 2 0.9941, and a low limit of determination (LOD) 15.5 cfu/mL were established. The method was validated with P. aeruginosa infected foci of mouse wound. The advantage of this aptasensor is that analysis results can be obtained within 1.5 h, which was much faster than that of the standard method (18–24 h). Furthermore, combined with a portable instrument, it can be used as a point-of-care testing for the early detection of P. aeruginosa infection, which is useful for selecting the correct antibiotics to achieve good therapeutic effects. Additionally, it also has a broad application prospect in food and environmental areas. Graphical abstract
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Journal of Translational Medicine
·
2024
·Vol. 22
·期 1
·1-13
·
IF 6.1
Li Jing,Wang Xiaochen,Bai Jie,Wei Huangzhao,Wang Wenbo,Wang Shuai
Background Hypertension influences the inflammatory pathological changes in the retina. The function of the inflammasomes is significant. To see if Sirtuin 1 (SIRT1) regulates angiotensin II (Ang II)-induced hypertensive retinopathy and inflammation by modulating NOD-like receptor thermal protein domain associated protein 3 (NLRP3) inflammasome activation and the potential protective effects of fucoidan (FO) in mouse retinal vascular endothelial cells (mRECs) and mice retina. Methods The diagnosis of hypertensive retinopathy was made after three weeks of Ang II infusion (3000 ng/kg/min). One day prior to the commencement of Ang II infusion, the mice were treatment with NLRP3 inhibitor MCC950 (10 mg/kg/day, intraperitoneal injections) or FO (300 mg/kg/day, oral gavage). A blood pressure was recorded. Hematoxylin and eosin (H&E) staining was used to conduct pathological alterations, dihydroethidium bromide (DHE) was utilized to assess oxidative stress damage in the retina, and fluorescence angiography was used to identify vascular disorders in the eye. Using immunohistochemical labeling, NLRP3 expression was found. Reactive protein and mRNA expression levels in mouse retina and cells were assessed using Western blot and real-time quantitative polymerase chain reaction (RT-qPCR). Results NLRP3 inflammasome activation and SIRT1 decrease were brought about by Ang II infusion. Retinopathy and dysfunction were lessened by MCC950 target-induced NLRP3 inflammasome activation, while overexpression of SIRT1 had the opposite impact on NLRP3 inflammasome activation, indicating that SIRT1 functions as an upstream regulator of NLRP3 activity. FO may improve SIRT1 expression and decrease NLRP3 activation in retinopathy and dysfunction brought on by Ang II, and the effects were consistent across both in vivo and in vitro models. Conclusions SIRT1 adversely regulates the NLRP3 inflammasome pathway, which in turn increases Ang II-induced inflammation and hypertensive retinopathy. FO may mitigate Ang II-induced retinopathy and dysfunction via modulating the expression of SIRT1/NLRP3. This implies practical approaches to the management of hypertensive retinopathy.
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