MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
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2020
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IF 3.085
Wanying Liu,Yabo Zhu,Xiaokuan Ban,Shasha Wang,Hua Zhu
In this study, a new method is proposed for the preparation of Ag/black phosphorus composite in an anhydrous system. Before the preparation, black phosphorus (BP) bulk is firstly preprocessed by a wet ball milling method combined with sodium hydroxide, so that BP can be functionalized and a large proportion (80%) of micro-multilayer BP flakes (MBP) with hydroxyl groups can be used. Then the addition of ethylene glycol and polyvinylpyrrolidone into the synthesis system prevents agglomeration of hydroxylated MBP flakes and enables the uniform distribution of Ag + on BP flakes, thereby yielding an Ag/MBP composite with Ag nanoparticles uniformly dispersed on BP flakes. XRD , Raman, and XPS results indicate that the BP with its lattice structure is retained in Ag/MBP. In fact, neither Ag nor hydroxylated MBP shows photocatalytic activity ; however, in the presence of Ag/MBP, methyl orange (MO) is completely degraded within 85 min under irradiation with light of wavelength 300–2500 nm. The well dispersed Ag nanoparticles enhance the absorption of high-intensity light and facilitate the transfer of photogenerated e − from BP, finally facilitating the separation of h + and e − . Superoxide radical (·O 2 − ) and holes (h + ) are identified to be the active radicals directly involved in the degradation of MO.
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SENSORS AND ACTUATORS B-CHEMICAL
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2020
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IF 7.1
Xinyu He,Chuang Ge,Xiangquan Zheng,Bin Tang,Li Chen,Shunbo Li,Li Wang,Liqun Zhang,Yi Xu
The rapid detection of alpha-fetoprotein (AFP) in serum is of great significance in the early diagnosis of hepatocellular carcinoma (HCC). A novel six-channel microfluidic SERS chip integrated with Ag/Au nanocomposites (NCs) for rapid SERS identification of AFP in serum was proposed in this work. Automatic injection was realized by negative pressure formed by specially designed PDMS module on the SERS chip. The serum samples originating from 60 HCC patients and 60 healthy people were measured by SERS on the designed microchip under the optimized conditions. The SERS spectra of serum samples from normal people and patients were collected and analyzed by Principal Component Analysis (PCA) which separated the characteristic Raman peaks of AFP of the two groups into two distinct clusters. Linear Discriminate Analysis (LDA) based on the PCA generated features differentiated the patients’ sera SERS spectra from the normal sera SERS spectra with a classification accuracy of 96.25% and a blind sample test accuracy of 95%. It is shown that the proposed microfludic SERS chip for AFP SERS test in serum can rapidly and efficiently identify HCC patients. It is of great research value and practical prospect in the fields of disease diagnosis and screening.
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FOOD CHEMISTRY
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2020
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IF 6.306
Huirong He,Da-Wen Sun,Hongbin Pu,Lunjie Huang
Aflatoxin B1 (AFB1) as the most toxic mycotoxin in contaminated food can greatly threaten human health, and sensitive and selective detection of AFB1 is thus highly desired. An ultrasensitive surface-enhanced Raman spectroscopy (SERS) aptasensor was developed for AFB1 detection in peanut oil samples. SH-cDNA modified Fe 3 O 4 @Au nanoflowers acted as capture probes, SH-Apt modified [email protected] nanospheres and commercial Cy3-Apt were used as reporter probes. Strong SERS signals of reporter probes were produced due to the recognition of AFB1 aptamer and its complementary strand (SH-cDNA). With the preferred binding of AFB1 aptamer to AFB1, reporter probes were released from capture probes, causing a linear decrease in SERS intensity. Therefore an ultralow detection limit of 0.40 pg·mL −1 in a wide linear range of 0.0001–100 ng·mL −1 was obtained and the sensibility of this SERS aptasensor was higher than that of the Cy3-Apt based SERS aptasensor. In addition, an excellent selectivity in interfering toxins and satisfactory recoveries of 96.6–115% in peanut oil samples were obtained, proving this aptasensor is a promising analytical tool in AFB1 detection.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2019
·Vol. 31
·期 3
·2231-2239
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IF 2.195
Zhao Gao-yu,Le Meng-ting,Zeng Gui-ju,Zhang Yu,Li Jin-hai
A new and rapid synthetic method toward polymer phenylethnylcopper (PPECu) nanowires is developed. PPECu nanowires have been firstly fabricated through using ascorbic acid instead of methanol as reducing agent. The preparation time of PPECu can be decreased from 48 to 2 h, even at a lower temperature. Ag/PPECu nanocomposites were prepared by the in situ reaction of PPECu and Ag (NH 3 ) + 2 ions with different concentrations. Ag/PPECu photocatalysts showed high visible-light H 2 production activity, which originated from the combined action of electrons transfer, sacrificing reagent and SPR effect of Ag nanoparticles.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2019
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IF 3.375
Jixing Cui,Rezwana Yeasmin,Yuanyuan Shao,Haiping Zhang,Hui Zhang,Jesse Zhu
There is an increasing interest to enhance resistance to pathogens on the powder-coated surface. Traditional silver antimicrobial agents are hard to endure high curing temperature and lead to the yellowness of the surface appearance. Commercial sources usually cut down silver loading (less than 2.5 wt %) to avoid the color change and this will result in a low inhibitory effect and poor durability. To improve the antimicrobial performance and maintain the appearance, Ag+, Cu2+, and Zn2+ ternary inorganic antimicrobial agents on Linde A zeolite supports were prepared in this study. The silver content of this agent is increased to 8–10 wt % and the coated surface exhibits high antimicrobial efficiency. The coating appearance shows a little adverse color change (ΔE = 1.47) when adding 2 wt % amount of agent. The reduction rate of this agent was over 99.99% after 6 h for Escherichia. coli, Staphylococcus aureus, and Candida albicans according to the ASTM E2180-07 standard, and the paint film can maintain over 99% reduction rate even for 11 cleaning cycles. X-ray photoelectron spectroscopy results show that Cu2+ is the main reduced ion during the curing process, which protects Ag+ from reduction. The leaching test confirms Zn2+ increases the number of extra exchangeable cations, which can prolong the antimicrobial durability. The selected molar ratio of Ag+, Cu2+, and Zn2+ is 1:2:3 according to quantitative study. Moreover, the addition of fillers and pigments was slightly increased the color change of the coated surface.
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WATER ENVIRONMENT RESEARCH
·
2019
·Vol. 92
·期 5
·713-721
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IF 1.24
Yunhai Zhang,Shuangxi Zhou,Xin Su,Jimin Xu,Guangze Nie,Yongjun Zhang,Yide He,Shuili Yu
A p-type TiO 2 with Ti vacancies (D-TiO 2 ) was synthesized by a facile solvothermal treatment, and Ag/TiO 2 with different Ag loading amount was prepared through a photo-reduction deposition method. The samples were characterized through scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The adsorption and photocatalytic characteristics of tetrabromobisphenol A (TBBPA) on D-TiO 2 and Ag/TiO 2 were investigated. The adsorption of TBBPA on Ag/TiO 2 was significantly enhanced and was five times greater than that of pure TiO 2 . The increase in pH significantly inhibited the adsorption of TBBPA. The 2%-Ag/TiO 2 nearly completely degraded TBBPA in 10 min under UV–Vis light (λ > 360 nm), and the apparent reaction rate constant ( k app ) reached 0.63 min −1 . The significantly enhanced UV–Vis light catalytic properties of the Ag/TiO 2 in comparison with that of TiO 2 were attributed to the increased adsorption capacity and electron transfer ability of the Ag/TiO 2 . Free radical trap experiments results showed that holes and superoxide radicals play a major role in the catalytic degradation of TBBPA by Ag/TiO 2 . Moreover, the Ag/TiO 2 catalyst exhibits high stability during TBBPA degradation even after three cycles. Practitioner points Ti-defected TiO 2 and Ag/TiO 2 were synthesized using a solvothermal and photo-reduction deposition, respectively. Ag/TiO 2 exhibited outstanding adsorption and photocatalytic activity for TBBPA removal under UV–Vis light. Holes and superoxide radicals play a major role in the photocatalytic degradation of TBBPA.
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JOURNAL OF MATERIALS SCIENCE
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2019
·Vol. 55
·期 4
·1475-1488
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IF 3.442
Huo Hang,Jiang Yanqiu,Zhao Tingting,Wang Zhe,Hu Yanjing,Xu Xianzhu,Lin Kaifeng
Noble metal nanoparticles are widely applied in the catalytic reactions with projected superior activity and selectivity. Usually, the surface atomic species function as active sites, and tailoring the size of the nanoparticles can control the catalytic activity of metal nanoparticles. However, it is still of great challenge to synthesize ultra-small metallic nanoparticles owing to the Ostwald ripening. Herein, confinement of molecularly imprinted cavities strategy was utilized to quantitatively load ultra-small Ag nanoparticles in the mesoporous silica matrix. The average particle size of the Ag nanoparticles was calculated to be around 2 nm, and these nanoparticles were uniformly dispersed in the skeleton of silica matrix without blocking the mesopores. The contents of Ag nanoparticles can be accurately adjusted according to the incorporated organosilica in the mesoporous silica matrix. As expected, the supported Ag nanoparticles exhibited highly efficient catalytic performance towards 4-nitrophenol hydrogenation reactions and showed considerable recycling stability without loss of Ag species.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2019
·
IF 3.218
Haibao Zhang,Guang Li,Xingyou Tian,Lin Chen,Hua Wang,Kang Zheng
Ag nanosheet hierarchical clubbed micro/nanostructured arrays (HCMNs) were prepared through two-step electrodeposition method on an ITO conduction glass coated ZnO seed layer (ZSL), the clubbed arrays were formed by the Ag nanosheets electrodeposited on the ZnO nanorods . Such arrays exhibit excellent surface-enhanced Raman scattering (SERS) performance including high activity and sensitivity, biological solubility and stability, and can be used as SERS substrate for trace analysis and detection of some chemicals. It was proved that their SERS detecting limit of R6G solution can be to10 −12 M, indicating the practical applications based on the SERS effect of noble-metal/semiconduct composite micro/nanostructured arrays.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Xinke Wang,Xue-xia Jia,Yonghui Wang,Shuang Li,Shuyue Ren,Yu Wang,Dianpeng Han,Kang Qin,Xueyu Chang,Huanying Zhou,Zhixian Gao
Ochratoxin A (OTA) is a potent carcinogen, and is among the most dangerous mycotoxins in agricultural products. In this study, an ultrasensitive dual-mode immunosensor was developed for naked-eye and fluorescence detection of OTA based on Ag-doped core–shell nanohybrids (Ag@CSNH). Complete antigen-labeled Ag@CSNH (CA-Ag@CSNH) were used as a competitive bind and dual-mode probe. The diffused doping structure of CA-Ag@CSNH provided improved stability, color and fluorescence quencher performance. Antibodies modified magnetic beads were used as a capture probe. The competitive binding between OTA and CA-Ag@CSNH produced both color change and fluorescence quenching. Ultraviolet and fluorescence intensitie correlated linearly with OTA concentration ranges of 0.03–3 ng/mL and 10–10000 pg/mL, and limits of detection of 0.0235 ng/mL and 0.9921 pg/mL, respectively. The practical applicability of proposed strategy was demonstrated by analysis of OTA in spiked corn, soybean and flour samples. This study offers a new insight on multi-mode platforms for various applications.
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Materials Today Physics
·
2023
·
IF 11.5
Xinyu Wang,Qingbo Xu,Jingchao Wang,Peng Wang,Yanyan Zhang
Cracking of conductive coatings is a primary cause of the poor durability of conductive fabrics. To address this, an Ag/MXene colloidal solution was prepared, which was stable owing to the evenly dispersed Ag particles on the MXene sheet structure. A cotton fabric sample was then coated with Ag/MXene using a dipping method, which resulted in excellent electrical conductivity. Finally, the Ag/MXene conductive coating on the polydimethylsiloxane (PDMS)-covered fabric significantly improved the conductive durability of the fabric. The finished cotton fabric exhibited excellent conductive properties, with a surface resistance of 13.9 ± 0.3 Ω/sq. In addition, the finished cotton fabric exhibited excellent mechanical durability against bending, folding, and strain. Therefore, finished cotton fabrics with excellent electrical conductivity and durability have great potential for application in wearable textiles and flexible sensors.
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DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Zeyu Zheng,Hui Xu,Jialin Wen,JiFeng Chen,Zhu Mao,Pengli Zhu,Rong Sun,Weijing Wu,Junbiao Peng
To meet the higher requirements posed by high-power chips on packaging materials, designing and fabricating a multi-functional integrated composite is an effective solution. In this work, the diamond/Ag hybrid filler was prepared (in-suit growth) using the “Ball milling-Heating” approach in the absence of any solvent or external force. Furthermore, the nano-micro hybrid filler was combined with the inherently high thermal conductivity liquid crystal epoxy resin to create composites through a hot-press curing. In this process, there is a synergistic interaction between fillers and matrix and Ag nanoparticles serve as bridging elements in nano-scale. Ultimately, the hybrid filler with a nano-microstructure effectively constructs “phonon-electronic-phonon” pathways in the liquid crystal epoxy matrix . When the hybrid filler content reached 80 wt%, the composites demonstrated a range of integrated advantages including high thermal conductivity (4.65 W/m·K), low coefficient of thermal expansion (CTE), high volume resistivity, and excellent thermal stability. The era of high-power devices is approaching, and this study offers a novel perspective on the application of epoxy-based composite materials in the realm of advanced packaging.
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SENSORS AND ACTUATORS A-PHYSICAL
·
2026
·
IF 5.1
Lulu Wang,Hui Wang,Mingyang Wang,Bokun Chang,Haojie Gao,Shihui Yu
Ultra-stable, transparent, skin-conformable SnO₂@Ag NWs temperature sensors. • Sensors show a working range (30–130°C) and high sensitivity (TCR=0.31%°C⁻¹). • Excellent stability under chemical corrosion, 300 thermal cycles, and 3000 bends. • Sensors exhibit rapid response (1.5 s) and recovery (1.2 s). • Applied for monitoring human skin temperature and respiratory status. Skin-conformable temperature sensors with high stability and sensitivity are essential for electronic skin and real-time health monitoring. However, achieving high stability while preserving sensitivity and a broad linear working range remains a challenge. Herein, we report a novel, highly stable resistive temperature sensor based on an all-solution-processed SnO₂@Ag core-shell nanowire composite, embedded in an ultrathin polyvinylidene fluoride (PVDF) substrate (~5.1 μm) via laser direct writing. The conformal SnO₂ shell (~2 nm) protects Ag NWs from degradation without compromising conductivity and transparency. The resulting sensor exhibits high optical transparency (89.5% at 550 nm), a linear temperature sensing range of 30–130 °C, a temperature coefficient of resistance (TCR) of 0.31% °C⁻¹ , and a temperature resolution of 0.5 °C. Notably, the sensor demonstrates stable resistance after 300 thermal cycles (30–80 °C) and 3000 bending cycles, with a maximum hysteresis error of 1.73% over the full range, highlighting its mechanical and thermal robustness. Furthermore, the core-shell structure imparts robust resistance to moisture, oxidants, and salt solutions, ensuring reliable operation in harsh environments. As a proof-of-concept, the sensor enables precise, skin-conformal measurement of human body temperature, and offers a rapid response/recovery time of 1.5 s/1.2 s for respiratory pattern monitoring, showing its significant potential for electronic skin applications. Download: Download high-res image (153KB) Download: Download full-size image
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