查找使用阿拉丁产品的科研文献

3D microprinting of QR-code integrated hydrogel tactile sensor for real-time E-healthcare

Zi-Rong Li,Tian-Run Lv,Zhenxu Yang,Wen-Hai Zhang,Ming-Jie Yin,Ken-Tye Yong,Quan-Fu An

Stretchable strain sensors have the potential to significantly advance electronic healthcare (E-healthcare). However, current challenges, including a limited detection range, low sensitivity, aggregation of conductive nanoparticles, and the inherent rigidity of conductive polymers within hydrogel matrices, hinder their progress. In our study, we employed a dual approach: we tailored both physical and chemical bond densities and coupled them with conductive polymer nanoparticles. As a result, we developed a stretchable hydrogel strain sensor embedded with a quick response code. This innovation achieved an impressive detection range of up to 1500% and a high gauge factor of 16.6. By modifying the hydrogen bond strength and converting conductive polymer nanoparticles into linear polymer chains, we managed to enhance the sensor's stretchability to 2100%. Moreover, the incorporation of a quick response code enabled the sensor to simultaneously monitor in real-time and encode information. Thus, our sensor emerges as a robust contender for pioneering advancements in E-healthcare, potentially supporting intricate applications like rehabilitation progression tracking.

Thermally robust hierarchical nanofiber triboelectric yarns for efficient energy harvesting in firefighting E-textiles

Jing Yan,Haoxuan Wang,Kaibo Wang,Weimin Kang,Guang Yang

Textile-based triboelectric nanogenerators (TENGs) face challenges in achieving high performance and fulfilling functional requirement for special applications. This paper presents the development of a high-performance, thermally robust hierarchical polyimide (PI) nanofiber triboelectric yarns with a charge-trapping interlayer for application in firefighting E-textiles. The hierarchical nanofiber yarns, comprising a stainless-steel core electrode, a PI/MXene interlayer and PI outer tribo-layer, exhibit enhanced triboelectric performance due to the charge-trapping capabilities of MXene, which preventing the recombination of triboelectric and induced charges. When the MXene content in the charge-trapping interlayer reached 1 wt%, the corresponding TENG achieved its optimal output performance, with an output voltage of 153 V and a current of 13.13 μA and a peak power density of 0.84 W/m 2 under optimal conditions. It also demonstrates exceptional thermal stability, maintaining stable output at temperatures up to 400 °C. The integration of the TENG into E-textiles enables real-time monitoring of firefighters’ physical activities and location tracking, significantly enhancing their safety and operational efficiency in fire scenarios. Additionally, the TENG powers electroluminescent yarns, improving visibility in dense smoke and dust environments. This research opens new avenues for the application of smart wearable systems in high-temperature environments, providing effective strategies for ensuring the safety of firefighters in fire rescue operations.

Portable hydrogel kit based on Michael addition reaction for (E)-2-hexenal gas detection

Ziyu Gan,Jun Wang

Plants exhibit rapid responses to biotic and abiotic stresses by releasing a range of volatile organic compounds (VOCs). Monitoring changes in these VOCs holds the potential for the early detection of plant diseases. This study proposes a method for identifying late blight in potatoes based on the detection of (E) -2-hexenal, one of the major VOC markers released during plant infection by Phytophthora infestans . By combining the Michael addition reaction with cysteine-mediated etching of aggregation-induced emission gold nanoclusters (Au NCs), we have developed a portable hydrogel kit for on-site detection of (E) -2-hexenal. The Michael addition reaction between (E) -2-hexenal and cysteine effectively alleviates the etching of cysteine-mediated Au NCs, leading to a distinct fluorescence color change in the Au NCs, enabling a detection limit of 0.61 ppm. Utilizing the superior loading and diffusion characteristics of the three-dimensional structure of agarose hydrogel, our sensor demonstrated exceptional performance in terms of sensitivity, selectivity, reaction time, and ease of use. Moreover, quantitative measurement of (E) -2-hexenal was made easier by using ImageJ software to transform fluorescent images from the hydrogel kit into digital data. Such method was effectively used for the early detection of potato late blight. This study presents a low-cost, portable fluorescent analytical tool, offering a new avenue for on-site detection of plant diseases.

Gold-Polyaniline Supercapacitive Biosensor for Selective Detection of E. Coli DH 5α

Md. Abdul Khaleque,Md. Hasibul Hassan,Md. Romzan Ali,Md. Anwar Hossain,Mohamed Aly Saad Aly,Waleed Alahmad,Munawar Sultana,Md. Zaved H. Khan

Bacterial identification is challenging due to several problems, such as low sensitivity, poor selectivity, and the lack of quantitative methods. To address these obstacles, a gold nanoparticles (AuNPs)@Polyaniline (PANI)/Phage electrode was developed. The bacteriophage was immobilized on the AuNPs@PANI modified electrode, serving as an electrochemical biosensor of Escherichia coli (E. coli) DH5 $\alpha$ . In application, this biosensor can detect of E. coli DH5 $\alpha$ within a dynamic range of 10–107 CFUmL-1 with the detection limit of 1.0 CFUmL-1. Modified AuNPs@ PANI/Phage electrode exhibits a signal/noise ratio equal to 3.0, but only AuNPs@ PANI displayed 1.025 in [Fe(CN)6]3−/4− This biosensor selectively detected of E. coli DH5 $\alpha$ bacteria in the presence of comparable concentrations of different bacterial strains. In addition, the modified electrode exhibited supercapacitive behavior during electrochemical characterization and showed a high specific capacitance of 782.61 Fg-1 at 1.0 Ag-1 and 94.7% retention over 10 000 GCD cycles. Further analysis was conducted using galvanostatic charge-discharge to measure capacitance and self-discharge to assess capacity retention over time, and the Dunn method to analyze the charge storage mechanism within the electrode material. In conclusion, the developed nanostructure displayed dual electrochemical behavior as a supercapacitor and biosensor. This is the first reported PANI functionalized capacitive-controlled electrodes for bacterial detection. The fabrication and detection process for a single glass carbon electrode (GCE)/AuNPs@PANI pernigraniline salt (PANI-PS)/Phage/E. coli electrode requires ~90 min, with an estimated material cost of U.S. ${\$}$ 5.28 per electrode. Furthermore, smartphone-based testing confirmed portable, realtime detectionwith <1.5% deviation, indicating promise for multichannel clinical biosensing.

Experimental and Theoretical Research on the Saturated Liquid Thermal Conductivity of HFO-1336mzz(E)

Guo Haowen,Wu Xilei,Zhuang Yuan,Guo Zhikai,Han Xiaohong,Chen Guangming

With the development of the alternative refrigerant technology, the thermophysical properties of hydrofluoroolefin (HFO) refrigerants have attracted much attention. Among these thermophysical properties, the thermal conductivity of refrigerants is a key parameter of phase change and convective heat transfer process of refrigeration cycle and also an important basis for the selection of alternative refrigerants. Therefore, studies on the thermal conductivity of refrigerants are of great significance. At present, many studies emphasized on the thermal conductivity of refrigerants, but there is no public report on the investigation of the saturated liquid thermal conductivity of HFO-1336mzz(E). On the basis of the current state, the thermal conductivities of HFO-1336mzz(E) by means of the general models were first predicted, then the thermal conductivities of the saturated liquid phase of HFO-1336mzz(E) in the temperature range of 253.15–353.15 K were measured based on the transient hot wire method. A comparison of prediction and experimental data was developed, and a special equation of the saturated liquid thermal conductivity for HFO-1336mzz(E) was recommended.

Enhancement of E-Peroxone process with waste-tire carbon composite cathode for tinidazole degradation

Xu Anlin,Liu Wanqun,Chu Leping,Zhang Yunhai,He Yide,Zhang Yongjun

The cathode is the key component in the electro-peroxone process (E-Peroxone), which is popularly constructed with carbon materials. This study developed an innovative method to fabricate a cathode with waste-tire carbon (WTC) whose performance was evaluated for the degradation of tinidazole (TNZ), an antibiotic frequently detected in water. It was found that the addition of WTC in the cathode can significantly promote the yield of H 2 O 2 and the current efficiency: around 2.7 times that of commercial carbon black at the same loading. The critical influencing factors were studied, including the current density, ozone concentration, initial pH value, chlorine ions and initial TNZ concentration. The scavenger tests demonstrated the possible involvement of •OH and ⁠ . Some transformation products of TNZ were identified with UPLC-MS and the degradation pathway was proposed accordingly. These results demonstrated the potential of WTC for developing E-Peroxone cathodes. The cathode with WTC generated more H 2 O 2 than a commercial carbon black cathode. Reaction conditions including current density, O 3 dose, pH values, initial TNZ concentration and electrolyte were studied. The main reactive oxygen species were probably •OH and ⁠ . Transformation products were identified and a degradation pathway was proposed.

Z/E Effect on Phase Behavior of Main-Chain Liquid Crystalline Polymers Bearing AIEgens

Jing Wang,Qian Jiang,Shuang Cao,Chenchen Sun,Yuping Zhang,Yuan Qiu,Hong Wang,Guochuan Yin,Yonggui Liao,Xiaolin Xie

The structure–property relationship of luminescent liquid crystalline polymers (LLCPs) with AIEgens has attracted much attention. However, the effect of the AIEgen configuration on the properties is still unclear because of the difficulty in designing LLCPs with a single configuration. In addition, it is expected that this effect can be amplified through constructing the AIEgen on the backbone of LLCPs. Herein, for the first time, we have synthesized two kinds of main-chain polyesters with a single configuration of an AIEgen, E-PM7 and Z-PM7, via melt polycondensation. Interestingly, E-PM7 shows two coexisting phases of rectangular columnar and smectic liquid crystalline phases, whereas Z-PM7 exhibits no liquid crystalline properties. Moreover, E-PM7 with AIE behavior and liquid crystalline properties can be used to prepare fluorescent patterns printed on flexible films and glass substrates through the photocyclization of AIE units, which endows this kind of material with promising applications ranging from anti-counterfeiting to information storage.

Targeting threonine deaminase with chiral Au NPs: A novel strategy for E. coli inhibition

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.

A novel Pseudomonas gessardii strain LZ-E simultaneously degrades naphthalene and reduces hexavalent chromium

Haiying Huang,Kejia Wu,Aman Khan,Yiming Jiang,Zhenmin Ling,Pu Liu,Yong Chen,Xuanyu Tao,Xiangkai Li

Combined pollutants with polycyclic aromatic hydrocarbons (PAHs) and heavy metals have been identified as toxic and unmanageable contaminates. In this work, Pseudomonas gessardii strain LZ-E isolated from wastewater discharge site of a petrochemical company degrades naphthalene and reduces Cr(VI) simultaneously. 95% of 10   mg   L −1 Cr(VI) was reduced to Cr(III) while 77% of 800   mg   L −1 naphthalene was degraded when strain LZ-E was incubated in BH medium for 48   h. Furthermore, naphthalene promotes Cr(VI) reduction in strain LZ-E as catechol and phthalic acid produced in naphthalene degradation are able to reduce Cr(VI) abiotically. An aerated bioreactor system was setup to test strain LZ-E’s remediation ability. Strain LZ-E continuously remediated naphthalene and Cr(VI) at rates of 15   mg   L −1   h −1 and 0.20   mg   L −1   h −1 of 800   mg   L −1 naphthalene and 10   mg   L −1 Cr(VI) addition with eight batches in 16   days. In summary, strain LZ-E is a potential applicant for combined pollution remediation.

E-Synapse Based on Lead-Free Organic Halide Perovskite (CH3NH3)3Sb2Cl9 for Neuromorphic Computing

Ziquan Ni,Yangbin Zhu,Songman Ju,Zhongwei Xu,Fengqing Tian,Hailong Hu,Tailiang Guo,Fushan Li

Robust Superhydrophobic E-Textiles Based on a Low-Wetting Conductive Interface for Health Management

Peng Jun,Jia Jiru,Tang Jinglei,Tang Jicheng,Wang Chaoxia

Functional e-textiles have garnered increasing attention in both academic and commercial domains. However, the development of e-textiles that simultaneously exhibit efficient electrothermal physiotherapy, effective electromagnetic interference (EMI) shielding, and reliable sensing capabilities remains a significant challenge. In this study, a robust superhydrophobic e-textile is developed through the fabrication of a three-dimensional interlocked conductive coating comprising MWNTs, MXene, and AgNWs, along with a low-wettability surface interface. The low-wettability interface imparts pronounced superhydrophobicity, for which the water contact angle is 155.2°, effectively protecting the conductive components from exfoliation and chemical damage. The integration of the MWNTs/MXene/AgNWs conductive coating with the prestretching process endows the superhydrophobic e-textile with exceptional strain-sensing performance, characterized by high sensitivity (414.8), rapid response time (40 ms), and a low detection threshold (0.1%). Furthermore, the formation of the interlocked conductive coating confers excellent electrical conductivity of up to 1826 S·m–1, enabling remarkable EMI shielding effectiveness (45.4 dB) and electrothermal performance (102.3 °C at 4.0 V). These results indicate that the developed superhydrophobic e-textile holds significant potential for utilization in fields such as EMI shielding, electrothermal physiotherapy, and motion tracking.

Removal of Ciprofloxacin from Wastewater by Ultrasound/Electric Field/Sodium Persulfate (US/E/PS)

Xiao Ma,Zhenjun Wang

Ciprofloxacin (CIP), as a common antibiotic used in human clinical and livestock farming, is discharged into natural water bodies and its concentration has increased in the last years. Its stable chemical structure is difficult to remove by conventional techniques. Residual ciprofloxacin in the environment has become an emerging micropollutant that promotes the generation of resistance genes of bacteria and endangers ecosystem balance and human health. Removal of ciprofloxacin from water by the system of ultrasound/electric field/sodium persulfate (US/E/PS) was investigated. Firstly, CIP degradation affects by different oxidation methods, such as ultrasonic oxidation, electro-oxidation, and persulfate oxidation, and their four combined oxidation methods (ultrasound-activated persulfate oxidation, electro-activated persulfate oxidation, ultrasound-enhanced electro-oxidation, and ultrasound-enhanced electro-activated persulfate oxidation), on the target contaminants were compared. Secondly, the influences of parameters on the CIP degradation by an ultrasound-enhanced electro-activation-persulfate reaction system were investigated. Thirdly, the possible free radical species in the ultrasound-enhanced electro-activation-sulfate reaction system were identified and the dominant free radical species in the system were analyzed. Finally, the samples of CIP in the US/E/PS system were tested by liquid mass spectrometry, and the possible intermediate products and degradation path were speculated. The results indicate that the US/E/PS system is of great potential application value in the removal of organic pollution and environmental purification.Keywords:ultrasound;antimicrobial drug;degradation;ciprofloxacin