Chem
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2017
·
IF 0
Haili Qin,Tan Zhang,He-Nan Li,Huai-Ping Cong,Markus Antonietti,Shu-Hong Yu
Synthetic materials capable of self-healing when damaged have attracted increasing attention and have been developing rapidly because of their many potential applications. Despite great achievements, there is an urgent need to advance the mechanical properties and reduce the time for healing simultaneously because of limited branch functionality and poor polymer mobility. Here, we report robust and smart hydrogels prepared using multi-vinyl-modified gold nanoparticles through a thiolate-gold coordination interaction as large crosslinkers. As a result of efficient energy dissipation from dynamic gold crosslinks with enhanced branching, hydrogels exhibit excellent elasticity with increased mechanical strength at high elongation, even when notched. Combined with thiolate-gold interaction as a healing motif and a notable optothermal effect of nanoparticles, hydrogels deliver rapid self-healing with optimal efficiency of nearly 96% under near-infrared irradiation in 1 min. These properties may shed light on promising applications for this kind of hydrogel in biomedicine and engineering.
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DOI
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ping Zhang,Qing Sui,Zhiqiang Liu,Chengyv Hu,Chunjing Li,Xiaodan Guo,Jinhui Wang,Guofa Cai
The stretchable electrochromic modulator is one of the most promising energy-saving optoelectronic devices that can be integrated into smart portable and wearable electronics. A lot of focus has been on developing transparent conductive electrodes of stretchable electrochromic modulators, but they generally suffer from poor chemical stability, low photoelectric balance, and unsatisfactory deformability. To address this challenge, we first develop Ag@Au nanowires (NWs) micromesh-based stretchable transparent conductive electrodes (STCEs) using a self-assembled approach, which displays superior photoelectric performance (8.5 Ω sq -1 with a transmittance of 81.5 %), good chemical stability in harsh electrolyte environment (acidic and alkaline) as well as robust mechanical stability (bending, folding, stretching and twisting). As a demonstration, the grown WO 3 on Ag@Au NWs-based STCEs can deliver good electrochromic stability even after bending over 1000 cycles and stretching to 50 %. Moreover, highly soft Zn//WO 3 and polyaniline (PANI)//WO 3 electrochromic modulators were assembled using flexible Ag@Au micromesh STCEs, which still retain uniform electrochromism in neutral and acidic electrolytes respectively. Definitionally, the strategy of in-situ grown Au shell on the surface of AgNWs micromesh provides an innovative solution to fabricate high-performance STCEs for the related portable smart wearable electronic devices.
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高影响因子
Coatings
·
2025
·Vol. 15
·期 4
·458
·
IF 2.8
Zifeng Zhu,Yiming Zhao,Yongming Ruan,Xuexiang Weng,Gesmi Milcovich
This study presents an easy and rapid two-step electrodeposition method for the synthesis of a novel hierarchical dendritic AuPt bimetallic nanocomposite electrode. Ascorbic acid served as both a reducing and directing agent, while a roughened carbon substrate facilitated the formation of the unique dendritic nanostructure. The structural and compositional properties of the synthesized material were comprehensively characterized using X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), selected area electron diffraction (SAED), and transmission electron microscopy (TEM). The resulting nanocomposite exhibited a significantly enhanced specific surface area of 6.97 m2g−1, compared to commercial Pt/C. Electrochemical investigations demonstrated superior electrocatalytic activity and durability for methanol oxidation in the prepared AuPt nanocomposite electrode, suggesting its promising potential for fuel cell applications.
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DOI
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Si-Ting Liu,Jia-Yi Zhang,Yu Zhou,Zhen-Long Dou,Cong-Cong Zhang,Si-Jing Ding,Qu-Quan Wang,Li Zhou
This paper presents a mechanistic study on the synthesis of Janus Mn:Ag2Se-Au heterogeneous nanostructures based on a step-by-step protocol. The extinction spectra and morphological observations exhibit interrelated data that elucidate the initial formation and subsequent evolution of growing Mn-doped Ag2Se domains onto Au nanoparticles. The size and morphology of the Mn:Ag2Se-Au can be adjusted by changing the amount of AgNO3. In addition, excessive Se source will generate a sparse Se shell around the Janus Mn:Ag2Se-Au. The characteristic plasmon resonance and photoluminescence attributes of Janus Mn:Ag2Se-Au render it a promising candidate for applications in the fields of sensing and imaging.
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高影响因子
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
·
2024
·
IF 2.5
He Wang,Haidu Yuan,Jianhao Zhang,Wenjing Yan
Bacterial infections are becoming a significant threat to global human health due to the growing prevalence of biofilm-related infections and the rise in antibiotic resistance. D/ l -cysteine functionalized chiral gold nanoparticles (D/P-Au NPs or L/P-Au NPs) have demonstrated a potent antibacterial effect against E. coli , while the mechanism remains to be elucidated through additional research. Threonine deaminase (TD) is a crucial enzyme involved in branched-chain amino acid (BCAA) biosynthesis in E. coli and is involved in cysteine's antimicrobial effects. This study investigated the interaction between chiral Au NPs (D/P-Au NPs or L/P-Au NPs) and TD as well as its effect on enzyme activity. It demonstrates that chiral Au NPs interact with TD through hydrophobic forces, forming a ground state complex that induces changes in the secondary structure of TD and reduces enzyme activity in a concentration-dependent manner. We found that the exogenous supplementation of isoleucine and valine (2 mg/mL) significantly reduced the antibacterial activity of chiral Au NPs, especially for L/P-Au NPs. The proteomics results indicate that the expression of ilvA and ilvB was down-regulated after L/P-Au NPs treatment, which would interfere with the synthesis of BCAAs. These results demonstrate that chiral Au NPs cause cell death of E. coli partly due to inhibition of TD enzyme activity and the synthesis of branched-chain amino acids.
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PubMed
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Yunsheng Shang,Xue Zhang,Xuemei Wang,Jin Yang,Xinxin Shi,Lu-Lu Qu,Yingqiu Gu
Noble metal aggregates have received increasing interest in environmental monitoring and biological analysis as SERS substrates due to their high sensitivity. Depositing nanoparticles onto oxide support presents an effective approach for assembling noble metals. In this study, Au@Fe 2 O 3 composite substrates were utilized for SERS detection. Low detection limits for 4-MBA (LOD 4-MBA = 4.79 × 10 −9 M) and MB (LOD MB = 3.36 × 10 −9 M) demonstrate this SERS technique has high sensitivity. The target molecule signal did not show a significant decline, indicating good temporal stability of the substrate. The synergistic effects arising from the electromagnetic enhancement from closely spaced Au NPs, chemical enhancement from Fe 2 O 3 , and enrichment by an external magnetic field endow the Au@Fe 2 O 3 composite substrate with outstanding SERS performance. Moreover, the Au@Fe 2 O 3 composite substrates have been successfully used to detect 4-ATP and 4-NTP in water, which has exhibited outstanding detection capability. (LOD 4-ATP = 7.25 × 10 −9 M, LOD 4-NTP = 1.85 × 10 −9 M).
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高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Wenjing Wang,Qi Tang,Tianrong Yu,Xing Li,Yang Gao,Jing Li,Yi Liu,Li Rong,Zhigang Wang,Hongchen Sun,Hao Zhang,Bai Yang
Nanocomposites based on hollow Au nanostructures have gained considerable attention in theranostics applications because of their unique plasmonic structures and attractive physicochemical properties. The exploration of feasible and facile methods for constructing multifunctional nanocomposites combined with bioactive molecules is greatly needed for the development of multifunctional theranostics platforms. In this work, resveratrol, a natural polyphenol with antioxidant activity and cancer-chemopreventive propertyies is employed as the reducing agent cum coating agent for the surfactant-free preparation of Au@resveratrol hollow NPs (Au@Res HNPs). The as-prepared Au@Res HNPs were found to present good photothermal performance and chemical inhibition for cancer therapy. In vitro experiments indicated that the Au@Res HNPs can block cell cycles to inhibit cell division and lead to cell apoptosis after 808-nm laser irradiation. Because no toxic surfactants are introduced, the current protocol avoids the tedious surfactant separation and surface modification processes that are necessary for most theranostics materials.
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PubMed
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2011
·Vol. 11
·期 12
·10320-10323
·
IF 1.352
Yan Shancheng,Xu Xin,Sheng Yun,Sun Huabin,Wu Jiansheng,Tang Lihua
A novel disposable biosensor is developed based on gold nanoparticles modified CdS nanorod arrays. The ordered CdS nanorod arrays firstly have been synthesized by a simple hydrothermal method. Then, the CdS nanorod arrays are modified by gold nanoparticles, which are directly fabricated
into an electrode for detection of cytochrome c (Cyc) in solution without any pretreatment. The modified CdS nanorod arrays biosensor with the immense surface area and high electrical conductivity shows a good sensitivity and linear range. This method may be used to construct other electrochemical
biosensors using aligned nanorod/nanowire films.
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PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Zeai Huang,Yaolin Chen,Jundao Wu,Wenwen Xie,Xiaoting He,Minzhi Ma,Kazuhiro Sayama,Ying Zhou
Production of peroxodisulphate (S2O82–) on powdered photocatalysts is a promising way to obtain high-value-added chemicals using solar energy; however, it is still suffering from low efficiency. In the present work, we fabricated bimetallic Au core and Pt shell nanoparticle-loaded WO3 (Au@Pt/WO3) photocatalyst for enhanced production of S2O82–, which is 1.7 times that of Pt nanoparticle-loaded WO3 (Pt/WO3), and was reported to be the best catalyst for S2O82– production. A further study demonstrated that the electronic interaction of Pt was successfully modulated by the core–shell nanoparticle architecture, and the core–shell nanoparticle structure between Au and Pt improved the formation of the surface chemical state of Pt to be metallic Pt, proposed as the active site for oxygen reduction. Besides, the core–shell nanoparticle structure also exposed a large amount of Pt on the surface of the substrate. As a result, Au@Pt/WO3 showed significantly enhanced photocatalytic activity of S2O82– with a quantum efficiency of 5.2% at 420 nm, whereas Pt–Au bimetallic alloy nanoparticle-loaded WO3 with a large amount of surface PtOx and exposed both Au and Pt on the surface showed very low activity. This work provides insights into the bimetallic Pt nanoparticle-loaded WO3 for enhanced photocatalytic activity.
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高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zilun Tang,Jianyu Wu,Xiaofeng Yu,Rui Hong,Xihong Zu,Xiaofeng Lin,Hongsheng Luo,Wenjing Lin,Guobin Yi
In this work, Au nanoparticle (AuNP) arrays on shape memory polyurethane (SMPU) substrates serve as flexible materials for tunable localized surface plasmon resonance (LSPR). AuNP arrays prepared by diblock copolymer self-assembly are transferred from rigid silicon wafers onto flexible SMPU substrates with ultrasonic treatment rather than peeling off directly. The resultant AuNP array SMPU films have excellent mechanical properties and stable thermodynamic properties. The LSPR arising from AuNP arrays is increased by negative bending on SMPU substrates, whereas the LSPR is decreased by positive bending. Besides, upon uniaxial tension, the vertical LSPR is increased first then decreased, whereas the parallel LSPR is similar, resulting in the overall LSPR of AuNP arrays being increased first and then decreased with the mechanical uniaxial tension of SMPU. Moreover, the resultant AuNP array SMPU films exhibit excellent flexibility, stability, and homogeneity in practical surface-enhanced Raman scattering (SERS) application. This approach of incorporating AuNP arrays on SMPU substrates for tuning plasmonic properties have great potential applications in SERS, fluorescence enhancement, and newly optoelectronic materials.
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PubMed
高影响因子
Russian Journal of Non-Ferrous Metals
·
2022
·Vol. 63
·期 1
·46-56
·
IF 0.691
He Puqiang,Xianzhi Hu,Futing Zi,Chaowu Wang
Abstract Effective gold recovery from thiosulfate leaching solution is important for the development of non-cyanide gold leaching technology. Herein, a novel functionalised activated carbon (denoted as AC-SH) that can effectively adsorb Au(I) from thiosulfate solution was synthesised using an environment-friendly route via the solid-phase reaction of activated carbon with 2-mercaptobenzoxazole. In the batch experiments, the effects of contact time, solution pH, temperature, and initial Au(I) concentration on the adsorption performance of AC-SH were investigated. Langmuir isotherm and pseudo-second-order kinetic models suitably described the adsorption of Au(I). Additionally, FT-IR, SEM, EDS, and XPS data revealed that AC-SH was successfully synthesised and Au(I) adsorption on AC-SH proceeded through chelation with Au(I) via the S‑containing functional group. The BET analysis result of AC shows that it is a mesoporous material (average pore diameter 2.193 nm). Additionally, Au-loaded AC-SH could be substantially desorbed (>95% recovery) using a concentrated thiosulfate solution. Herein, an economical, simple, and easy-to-implement method for the effective recovery of Au(I) from thiosulfate solution is described, which is expected to advance the development and application of non-cyanide Au extraction technology.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 15
·12983-12990
·
IF 2.22
Yang Bingqian,Yu Yawei,Qiao Jingyuan,Yuan Lefan,Hu Xiulan
Au/CuO nanoparticles with a size range of 20–40 nm directly synthesized by solution plasma method in water have been successfully applied to the non-enzyme detection of glucose. The electrocatalytic activities of Au/CuO nanoparticles toward glucose were evaluated in an alkaline solution by cyclic voltammetry and real-time current method. Research results demonstrate that the biosensor modified by Au/CuO catalysts has a fast reaction time (< 3 s) and low detection limit (0.22 µM). There are two specific linear ranges of 0.22 µM–1 mM and 3 mM–18 mM, with the sensitivities of 172.45 µA mM −1 cm −2 and 63.66 µA mM −1 cm −2 , respectively. Moreover, it also exhibited remarkable current response, good stability (87% after 50 days), superior reproducibility, and excellent selectivity in interfering species (such as D-fructose, ascorbic acid and uric acid). Therefore, the Au/CuO nanoparticles directly synthesized by solution plasma method can be implemented to the enzyme-free detection of glucose.
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