LANGMUIR
·
2021
·
IF 3.882
Hui Yuan,Hsiu-Wei Cheng,Laura LE Mears,Renliang Huang,Rongxin Su,Wei Qi,Zhimin He,Markus Valtiner
Osteoarthritis is a prevalent degenerative joint disease characterized by progressive articular cartilage loss and destruction. The resultant increase in friction causes severe pain. The collagen I matrix (COL I) has been used clinically for cartilage repair; however, how COL I acts at cartilage surfaces is unclear. Here, we studied adsorption and lubrication of synovial fluid components, albumin, γ-globulin, and the phospholipid DPPC, on COL I under physiological conditions using surface plasmon resonance and an in situ sensing surface force apparatus. Our results revealed COL I had poor lubrication ability, a fairly high coefficient of friction (COF, μ = 0.651 ± 0.013), and surface damage under a 7 mN load. DPPC formed an improved lubricating layer on COL I (μ = 0.072 ± 0.016). In sharp contrast, albumin and γ-globulin exhibited poor lubrication with an order of magnitude higher COF but still provided benefits by protecting COL I from wear. Hence, DPPC on COL I may help optimize COL I implantation design.
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DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 16
·2200724
·
IF 10.05
Jun-Hua Wei,Yong-Wei Yu,Jian-Bin Luo,Zhi-Zhong Zhang,Dai-Bin Kuang
Anti-counterfeiting has become a serious issue around the global world; fluorescence-based tags are praised for the low-cost and facile decryption process. However, the high-level anti-counterfeiting application requires incorporating multifunctional luminescent materials with response to different excitation sources. Herein, a dimeric Cu(I)-halide-clusters-assembled single-crystal (AEP) 2 Cu 2 I 6 ·2I·2H 2 O (AEP = N -aminoethylpiperazinium) concerning a high down-conversion photoluminescence quantum yield (PLQY) value of near unity is reported (λ ex = 305 nm), which can also be activated by the near-infrared light and X-ray. The ultrafast spectroscopy and density functional theory calculations reveal that the broad-band emission originates from the recombination of self-trapped excitons. Remarkably, the high PLQY and excellent attenuation capability for X-ray confers an outstanding light yield of 55 650 photons MeV −1 to (AEP) 2 Cu 2 I 6 ·2I·2H 2 O, which is 5.25 times higher than the standard bismuth germaniumoxide scintillator. Such multi-light-stimulus response endows (AEP) 2 Cu 2 I 6 ·2I·2H 2 O with great application potential in anti-counterfeiting, solid-state lighting devices, and digital radiography.
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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.
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INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Zhenzhong Wang,Yiping Du,Chao Wang,Lin Ma,Chen Li,Taifeng Lin,Jiawen Xiao,Zhengguang Yan
Hybrid copper(I) halides have garnered a significant amount of attention as potential substitutes in luminescence and scintillation applications. Herein, we report the discovery and crystal growth of new zero-dimensional compounds, (C2H8N)3Cu2I5 and (C2H8N)4Cu2Br6. The bromide and iodide have a triclinic structure with space group P1̅ and an orthorhombic structure with space group Pnma, respectively. (C2H8N)3Cu2I5 exhibits cyan emission peaking at 504 nm with a photoluminescence quantum yield (PLQY) of 34.79%, while (C2H8N)4Cu2Br6 shows yellowish-green emission peaking at 537 nm with a PLQY of 38.45%. The temperature-dependent photoluminescence data of both compounds were fitted to theoretical models, revealing that nonradiative intermediate states significantly affect thermal quenching and antiquenching. Electron–phonon interactions, the origin of emission line width broadening and peak shifting, were also investigated via fittings. The scintillation properties of (C2H8N)3Cu2I5 were evaluated, and an X-ray imaging device was successfully fabricated using (C2H8N)3Cu2I5. This work demonstrates the potentiality of copper halides in lighting and X-ray imaging applications.
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ACS Materials Letters
·
2024
·
IF 9.6
Jian Chen,Shining Geng,Xuanyu Zhang,Xin Pan,Congcong Chen,Ruiqian Li,Junqian Wen,Chen Sun,Rui Chen,Zewen Xiao,Lingling Mao
The design and construction of new phosphors with significantly different emission colors are key areas in solid-state lighting technologies. Hybrid copper(I) iodides are excellent candidates with multicolor luminescence due to their remarkable structural diversity, superior luminescence performance, and highly tunable optical characteristics. Here, we synthesize and characterize a series of new 0D isomeric copper iodides, namely, Cu4I4(3-trifluoromethylpyridine)4. The emission center [Cu4I4] cubane coordinates with a sterically hindered 3-trifluoromethylpyridine ligand to form four 0D isolated copper iodide clusters, which show ligand-configuration-dependent photoluminescence. The four polymorphs emit blue, green, yellow, and pure white-light, respectively, with high photoluminescence quantum yields (PLQYs) in the range of 80–95%. Time-resolved photoluminescence spectra of all compounds show long averaged decay lifetime up to 10 μs. Density functional theory calculations reveal the electronic structures and the emission characteristics at excited states, illustrating the structure–emission relations. Our results demonstrate that the ligand configurations and orientations have strong impact on the distortion of [Cu4I4] cubane at the excited state, leading to different energy transitions and emission colors. This work provides a new design strategy for multicolor luminescent phosphors and presents the first example of pure white-light emission in a copper(I) iodide system with a near-unity PLQY.
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高影响因子
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
·
2021
·
IF 0.896
Chanchan Xu,Lu Lu,Le Lv,Yuzhe Li,Fang Lin,Yunxu Yang,Feng Lin,Chaoyun Luo,Dawei Luo,Wei Liu
Single crystals of a zero-dimensional (0 D) copper (I) complex 0 D-CuBr(3-picoline)3 (1) has prepared at room temperature. Each molecule of 1 contains one copper ion, which coordinates to three organic ligands and one Br anion. The strong metal-to-ligand charge transfer (MLCT) along with the halide-to-metal charge transfer (XLCT) makes 1 an extremely strong green emitter with near-unity quantum efficiency, exhibiting potential application as lighting materials.Single crystals of a new zero-dimensional (0D) copper (I) complex 0D-CuBr(3-picoline)3 has prepared at room temperature. It serves as an extremely strong green-yellow emitter with near unity quantum efficiency, exhibiting potential application as lighting materials.
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高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2016
·
IF 2.357
Jianhua Zhu,Chenxin Ouyang,Shumin Xiao,Yongyi Gao
This work reports the recent study on the microwave sintering (MS) versus conventional sintering (CS) of NiCuZn ferrites, with particular interests in the densification evolution. NiCuZn ferrite powders were synthesized through the solid state reaction route . Densification behaviors of ferrite samples under the two types of thermal sources were monitored in real-time. Meanwhile, the influences of additives (1 wt% BSZ glass or 1 wt% Bi 2 O 3 ) on the densifications were also investigated. Both constant heating rate (CHR) and master sintering curve (MSC) models were used to evaluate the sintering activation energy ( Q ). Results demonstrated that the microwave-enhanced diffusion mainly occurs at the intermediate sintering stage. The Q -value estimated by MSC method agreed well with that from CHR method. With the influence of microwave electromagnetic field, the activation energy of NiCuZn ferrites was decreased by roughly 100–150 kJ/mol. In addition, doping a small amount of additives could improve densification degree and reduce the minimal energy to activate diffusion mechanisms .
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高影响因子
PHYSICS LETTERS A
·
2024
·
IF 2.3
Ting-ting Yan,Ran Jiang,Dong-yang Xi,Long Ma,Dan-dan Zhang,Yi-fei Xu
This study investigated the structural stability of 1-methylhydantoin (1-MH, C 4 H 6 N 2 O 2 ) Form-I at room temperature using Raman spectroscopy and a diamond anvil cell (DAC) for high-pressure experiments. Two phase transitions were identified at pressures of 0.6–1.7 GPa and 3.4–6.7 GPa. After complete release of pressure, the spectrum aligned with the Raman spectrum at ambient pressure, indicating reversibility of the phase transition. Analysis of Hirshfeld surface energy and fingerprints was conducted to assess changes in intermolecular interactions, revealing that the phase transitions are associated with rearrangements in the hydrogen-bonded network.
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 9
·4024
·
IF 4.9
Jing Xue,Xianzhang Jiang,Anjing Li,Jiaxin Li,Xiaoyun Su,Jianzhong Huang,Lina Qin
Understanding the molecular mechanisms of cellobiohydrolase I (CBHI), a key enzyme in cellulase complexes, is crucial for developing efficient enzymes for the degradation of lignocellulosic biomasses (LCB). Building on our previous discovery thatChaetomium thermophilumCBHI (C-CBH) exhibits significantly higher specific activity thanTrichoderma reeseiCBHI (T-CBH), systematic domain-swapping experiments were conducted to elucidate the structural determinants of catalytic efficiency in CBHI. Herein, the carbohydrate-binding modules (CBM) of the CBHIs fromTrichoderma reesei(T-CBH) andChaetomium thermophilum(C-CBH) were interchanged and to obtain two chimeric mutants TC-CBH and CT-CBH. These four CBHs were expressed inT. reesei, and the enzyme properties were analyzed. Comparative characterization revealed that while module exchange preserved native temperature/pH adaptability, it significantly altered substrate specificity and catalytic performance. The CT-CBH variant was identified as the most efficient biocatalyst, exhibiting four key advantages over T-CBH: (1) protein expression levels that far exceed those of T-CBH, (2) specific activity enhanced by 2.6-fold (734.5 U/μM vs. 282.5 U/μM on MU-cellobiose), (3) superior degradation capacities for filter paper (1.6-fold) and xylan, and (4) improved binding affinity for crystalline cellulose. These findings establish cross-species domain engineering as a viable strategy for creating high-performance cellulases, providing both mechanistic insights and practical solutions for lignocellulose degradation.
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2021
·
IF 2.495
Liyan Wang,Cihan Lou,Ming Zhao,Bing Zhao,Huaping Zhao,Wenhui Ma,Aiqi Wang,Xu Wang,Ning Wang,Yifei Li
A small-molecule fluorescent probe ( BNBC ) based on naphthalene for cascade recognition of Hg 2+ and I – in 50% CH 3 CN/H 2 O solution. The sensitive and selective binding behaviors of BNBC were investigated by fluorescence spectroscopy. With the addition of metal ions , the fluorescent probe BNBC showed high sensitivity and selective ratiometric detection of Hg 2+ , which was attributed to the excimer-monomer emissions of naphthalene . Moreover, the BNBC -Hg 2+ complex showed a selective fluorescence “turn-off” for I – via the formation of three-component ensemble.
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高影响因子
POLYMER SCIENCE SERIES B
·
2021
·Vol. 63
·期 3
·272-279
·
IF 1.049
Liangliang Yang,Liu Fang,Zhao Qun
Abstract The antibacterial properties of chitosan and self-repairing properties of collagen-I play important roles in the medical field. New types of collagen-I/chitosan/methyl vinyl silicone rubber materials have been synthesized by blending and grafting copolymerization. The effects of chitosan contents on mechanical and antibacterial properties of collagen-I/chitosan/methyl vinyl silicone rubber were investigated, while the morphology and molecular structure were observed and analyzed. It was determined that the antibacterial and self-repairing properties of collagen-I/chitosan/methyl vinyl silicone rubber were better than those of methyl vinyl silicone rubber. Additionally, the optimal contents of chitosan and collagen-I were determined to be 5 wt % and 5 mg/mL, respectively.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 193
·期 1
·15
·
IF 5.3
Zhang Yan,Yan Yuting,Huang Yue
An innovative electrochemical biosensor is proposed for the sensitive detection of ofloxacin (OFL) by integrating exonuclease I (Exo I)–assisted recognition-transduction strategy into the MXene/AuNP-enhanced electrochemical platform. Through ingenious design, the presence of OFL triggers the competitive displacement reaction and enables Exo I to hydrolyze the released single-stranded DNA probe containing the sequence of Pb 2+ -DNAzyme, protecting the signal probes on the electrode surface from DNAzyme cleavage, which eventually brings about a remarkable electrochemical signal positively related to the concentration of OFL. MXene/AuNPs with excellent conductivity, large specific surface area, and good chemical stability are employed as the electrode substrate to efficiently accelerate charge transfer and increase the loading capacity for signal probes, leading to the enhancement of signal output and endowing the biosensor with high sensitivity, rapid response, and fine robustness. Taking advantage of OFL recognition–initiated Exo I hydrolysis to DNAzyme, the electrochemical platform with “signal-off/on” mode can detect OFL with good specificity and reduced background interference. Benefiting from the synergistic effect of the involved sensing elements, the developed electrochemical biosensor achieves a low detection limit of 0.47 pg mL −1 with a broad linear range and exhibits satisfactory detection performance in real food samples, indicating potential practical applicability in food safety monitoring. Graphical
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DOI
PubMed
高影响因子
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