CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Tiansheng Gan,Wenhui Shang,Stephan Handschuh-Wang,Yaokang Zhang,Xuechang Zhou
Galvanic replacement reaction (GRR) holds immense potential for engineering metal nanostructures. This reaction allows for the formation of bimetallic hollow nanostructures in a single step, in which precise control of the reaction is necessary to customize the size, composition, and morphology. Whereas achieving trimetallic or multimetallic systems through sequential GRR is highly desirable, their synthesis remains challenging because of the high complexity of multistep GRR processes and the fact that they require precise control of the addition sequence and amount of metal precursors. Here, we introduce a simplified sequential GRR approach, namely, “living” galvanic replacement reaction (LGRR). The LGRR utilizes a liquid metal (LM) nanoreactor consisting of a chemically active LM core and a polydopamine (PDA) shell. The LM core undergoes stepwise reactions with various dissolved metal ions, leading to the nucleation and growth of reduced metal nanocrystals on the PDA shell within minutes at room temperature. Importantly, the LM core remains active (“living”), and the LGRR continues uninterrupted by both the deposited metals and the addition sequence of the metal precursors. We demonstrate that the LGRR of LM nanoreactors facilitates the stepwise growth of different metal nanocrystals when different metal precursors are added sequentially, resulting in the formation of diverse multimetallic nanostructures that possess a phase-segregated multimetallic shell surrounding an LM core. Furthermore, the LGRR of the LM nanoreactors also enables the rapid synthesis of nanoalloys within 5 min by simultaneously reducing different precursors.
研究领域:
材料科学
·
纳米技术
·
化学
·
冶金学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Kui Liang,Hailin Yang,Wenxun Guo,Jianlong Du,Lingyun Tian,Xiaofeng Wen
Silicon has been regarded as a promising alternative anode material for next-generation lithium ion batteries (LIBs) due to its high theoretical specific capacity of 3590 mAh g −1 (Li 3.75 Si formed at room temperature). In this work, nanoscale silicon has been synthesized via a simple and effective metathesis reaction in which SiCl 4 is the silicon source and Zn is the reductant and solvent, at a mild temperature of 500 °C. The preparation process is very simple, facile and low-cost. The as-prepared silicon particles are spherical with a diameter of 150–200 nm, and the delithiation capacity of the nanoscale silicon can reach 1747.7 mAh g −1 at a current density of 0.2 A g −1 .
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Xiaojuan Liu,Ningning Xu,Panpan Gai,Feng Li
Since melamine is a strong hazard to human health, the development of new methods for highly sensitive detection of melamine is highly desirable. Herein, a novel fluorescent biosensing strategy was designed for sensitive and selective melamine assay based on the recognition ability of abasic (AP) site in triplex towards melamine and signal amplification by Mg 2+ -dependent DNAzyme. In this strategy, the melamine-induced formation of triplex DNA was employed to trigger the strand displacement reaction (SDR). The SDR process converted the specific target recognition into the release and activation of Mg 2+ -dependent DNAzyme, which could catalyze the cleavage of fluorophore/quencher labeled DNA substrate (FQ), resulting in a significantly increased fluorescent signal. Under the optimal conditions, the fluorescent signal has a linear relationship with the logarithm of the melamine concentration in a wide range of 0.005–50 μM. The detection limit was estimated to be 0.9 nM (0.1ppb), which is sufficiently sensitive for practical application. Furthermore, this strategy exhibits high selectivity against other potential interfering substances, and the practical application of this strategy for milk samples reveals that the proposed strategy works well for melamine assay in real samples. Therefore, this strategy presents a new method for the sensitive melamine assay and holds great promise for sensing applications in the environment and the food safety field.
研究领域:
生物化学
·
食品安全
·
分析化学
✓ 已验证
DOI
高影响因子
SENSORS
·
2020
·Vol. 20
·期 5
·1331
·
IF 3.275
Yue Wang,Huan Feng,Haibo Li,Xinyi Yang,Hongmin Jia,Wenjun Kang,Qingtao Meng,Zhiqiang Zhang,Run Zhang
Quick and effective detection of biothiols in biological fluids has gained increasing attention due to its vital biological functions. In this paper, a novel reversible fluorescence chemosensor (L-Cu2+) based on a benzocoumarin-Cu2+ensemble has been developed for the detection of biothiols (Cys, Hcy and GSH) in human urine. The chemosensing ensemble (L-Cu2+) contains a 2:1 stoichiometry structure between fluorescent ligandLand paramagnetic Cu2+.Lwas found to exclusively bond with Cu2+ions accompanied with a dramatic fluorescence quenching maximum at 443 nm and an increase of an absorbance band centered at 378 nm. Then, the in situ generated fluorescence sluggish ensemble,L-Cu2+, was successfully used as a chemosensor for the detection of biothiols with a fluorescence “OFF-ON” response modality. Upon the addition of biothiols, the decomplexation ofL-Cu2+led to the liberation of the fluorescent ligand,L, resulting in the recovery of fluorescence and absorbance spectra. Studies revealed thatL-Cu2+possesses simple synthesis, excellent stability, high sensitivity, reliability at a broad pH range and desired renewability (at least 5 times). The practical application ofL-Cu2+was then demonstrated by the detection of biothiols in human urine sample.Keywords:chemosensor;biothiols;displacement;detection;urine samples
研究领域:
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOELECTROCHEMISTRY
·
2022
·
IF 5.76
Jinzhi Liu,Mengyan Wang,Chi Zhang,Gaiping Li,Qi Shen,Lina Zou
Herein, a “signal-on” electrochemical aptasensor based on dual-output toehold mediated strand displacement reaction (TMSDR) was developed to detect cytokeratin fragment antigen 21–1 (CYFRA 21–1). First, the methylene blue (MB) labeled signal probe (SP) was combined with a long template strand (TS) to form the three-strands duplex, which was immobilized on magnetic beads. The sequence of TS was innovatively designed with two toehold zones. Thus, with the presence of target DNA and Fuel strand (F), double SP and target were released through TMSDR. Besides, the released target could participate in the next cycle, achieving the further amplification. The released SP was selected by magnetic separation, then added to the gold electrode (GE) to hybridize with the hairpin DNA. Ultimately, the target can be detected by recording the current response of the MB. Under optimized conditions, the response peak current was linear with the concentration of CYFRA 21–1 in range from 10 pM to 1 μM with detection limit of 8.079 pM. The proposed signal amplification strategy was enzyme-free in homogenous solution and the using of magnetic beads improved the recognition efficiency and simplified the experimental steps, which endowed the sensor with super-sensitivity.
研究领域:
生物化学
·
医学检测
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
LANGMUIR
·
2017
·
IF 3.833
Sanjun Yang,Qiming Liu
An aligned Ag nanowire array was directly synthesized by galvanic replacement on curved poly(ethylene terephthalate) (PET) by using a Cu2O microcrystal as a reductant. A more orderly aligned nanowire array was obtained when the curvature radius was reduced. A second growth with different orientation produced Ag nanowire networks. The guided growth was also achieved when using Zn as a reductant or polystyrene as a substrate. This plain method with facile control over the orientation and density of the Ag nanowire array enriches the grow-in-place methodology and can potentially be applied to various fields.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Junhua Chen,Gu Shi,Chong Yan
A visual detection method was proposed for polychlorinated biphenyls (PCBs) detection using lateral flow test paper as the sensing platform. The aptamer sequence was used to recognize the target 3,3′,4,4′-tetrachlorobiphenyl (PCB77). The integration of Zn2+-dependent DNAzyme with toehold-mediated strand displacement reaction significantly improved the response signals. Gold nanoparticles were utilized as the signal tracers in the test paper, making the results visible directly by the naked eye. Under optimal conditions, the paper enables the visual detection of PCB77 as low as 10 pM without additional instrumentation. The assay displays a high selectivity for PCB77 against potential interfering molecules. The visual test paper is robust and has been applied to the detection of PCB77 in milk samples with good recovery and satisfactory accuracy. Using two different PCBs (PCB77 and PCB72) as inputs, we further fabricated OR and AND logic gates, which is conducive to the development of an intelligent detection strategy for PCBs monitoring. Given the attractive characteristics of disposability, low cost, logic operation, and intuitive output, the test paper shows great promise for on-site screening of PCBs in resource-limited areas.
研究领域:
分析化学
·
环境科学
·
生物传感
✓ 已验证
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 31
·期 11
·115301
·
IF 3.399
Muhammad Murtaza,Naveed Hussain,Lin Sen,Hui Wu
Synthesis of silver (Ag) nanoparticles with controllable morphology and with high purity remains challenging. In this work, single crystalline Ag nanoparticles with uniform morphology and high purity are successfully synthesized based on the replacement reaction between aqueous Ag nitrate (AgNO3) and solid copper (Cu) via jet. We further demonstrate that the developed jet method is facile and morphology-controllable. It is believed that diffusion limited aggregation and oriented attachment mechanisms are responsible for the formation of Ag nanostructures. The synthesized nanoparticles were characterized by different techniques. Finally, the Ag nanoparticles are successfully applied to prepare the conductive ink for flexible electronics and wearable equipment. Furthermore, the conductivity, flexibility and stability of the conductive material are measured. The conductive pattern exhibits lowest resistivity of 6.7 μΩ cm, showing the good conductivity of the prepared conductive material. In addition, the prepared conductive material is flexible in nature and exhibits stability over a long period.
研究领域:
材料科学
·
化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2019
·
IF 13.903
Yan Liu,Bin Zhou,Sheng Liu,Qingshan Ma,Wen-Hua Zhang
One-dimensional nanotubes are very useful for achieving excellent performance in lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) due to the fact that tubular structures can effectively alleviate the structural strain and shorten the ion diffusion length during repeated cycling. In this work, we report a Cu2Sb-mediated growth strategy to controllably fabricate highly uniform Sb nanotubes (NTs), as well as Cu@Cu2Sb and Cu2Sb@Sb composite NTs, via a facile galvanic replacement reaction using Cu nanowires (NWs) as sacrificial templates. Benefiting from their structural merits, the Sb NTs manifest excellent sodium storage performance with superior rate performance (286 mAh g–1 at 10 A g–1) and extraordinary cycling stability (342 mAh g–1 after 6000 cycles at 1 A g–1). Furthermore, a full cell with Sb NTs as anode and Na3(VOPO4)2F as cathode exhibits a high energy density (252 Wh kg–1) and high output voltage (2.7 V), revealing their significant application promise in the next-generation SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2021
·
IF 4.821
Qiao Xu,Ke Liu,Jingjing Jin,Xinfeng Zhang
The assay of biomarker proteins is of critical importance for disease diagnosis. In this work, we have designed a cascaded strand displacement reaction system for detection of low abundant biomarker protein in serum samples. The proposed binding-induced strand displacement conversion system, first converts a protein recognition event into the output of the DNA (cDNA) catalyst, and then the output cDNA catalytically load the reporter DNAzyme onto magnetic beads based on catalyzed hairpin assembly (CHA) reaction. The high density of the hairpin DNA on a magnetic bead surface results in an over 20-fold improvement in the reaction efficiency of CHA, compared with conventional CHA. In addition, the magnetic beads are able to efficiently separate the serum sample matrix that could remarkably affect the DNAzyme-catalyzed chemiluminescent (CL) reaction. This type of magnetic biosensor allows for the detection of 0.5 pM target protein in serum samples, whereas when using homogenous CHA biosensors, the CL signal for 2 nM PDGF-BB is seriously inhibited by the serum matrix. Since the sensing system integrates the protein recognition, signaling, signal amplification and matrix separation functions, it is promising for the assay of proteins in biological samples.
研究领域:
生物化学
·
分子诊断
·
纳米医学
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2024
·Vol. 26
·期 5
·2763-2772
·
IF 9.3
Lei Guo,Shuaibo Gao,Zuojun Hu,Yongxin Wu,Fangzhao Pang,Huayi Yin,Dihua Wang
Green metal-electrode batteries call for the clean production of s-block metals. Herein, we developed an electrolysis–displacement–distillation (EDD) approach for producing s-block metals with low-carbon emissions and no chlorine gas evolution. The clean production stems from the choice of a molten NaCl–Na2CO3 electrolyte to prevent chlorine gas evolution, an inert nickel-based anode to produce oxygen, and a liquid metal cathode to make the cathodic product (e.g., Na–Sn) sit at the bottom of the electrolytic cell. Later, M–Sn (M = Li, Mg, Ca, Sr, and Ba) alloys were successfully prepared by a displacement reaction between the Na–Sn alloy and molten NaCl–LiCl, NaCl–MgCl2, NaCl–CaCl2, NaCl–SrCl2, or NaCl–BaCl2 with a displacement efficiency of >96.0%. Furthermore, Li, Mg, Ca, Sr, and Ba metals were separated from M–Sn alloys using vacuum distillation with a separation rate of >95.0%. We achieved a current efficiency of 81.0% for the electrolytic production of 100 kg of a liquid Na–Sn alloy, which holds promise to produce s-block metals at a large scale.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2023
·
IF 5.7
Yu Xiongtao,Bai Silan,Wang Lishi
In this work, gold nanoparticles@Ti3C2 MXenes nanocomposites with excellent properties were combined with toehold-mediated DNA strand displacement reaction to construct an electrochemical circulating tumor DNA biosensor. The gold nanoparticles were synthesized in situ on the surface of Ti3C2 MXenes as a reducing and stabilizing agent. The good electrical conductivity of the gold nanoparticles@Ti3C2 MXenes composite and the nucleic acid amplification strategy of enzyme-free toehold-mediated DNA strand displacement reaction can be used to efficiently and specifically detect the non-small cell cancer biomarker circulating tumor DNA KRAS gene. The biosensor has a linear detection range of 10 fM −10 nM and a detection limit of 0.38 fM, and also efficiently distinguishes single base mismatched DNA sequences. The biosensor has been successfully used for the sensitive detection of KRAS gene G12D, which has excellent potential for clinical analysis and provides a new idea for the preparation of novel MXenes-based two-dimensional composites and their application in electrochemical DNA biosensors.
研究领域:
生物医学工程
·
分子诊断学
·
纳米技术
✓ 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）