NEW JOURNAL OF CHEMISTRY
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2025
·
IF 2.5
Hao Zhong,Zhenyu Lin,Yongqiang Dong
For the first time, single-layer carbon dots (CDs) were used as capping agents to synthesize cuprous oxide nanosheets (Cu2O-NSs) as a high-performance surface enhanced Raman scattering (SERS) substrate, emphasizing their chemical enhancement mechanism. The Cu2O-NSs, synthesized using single-layer carbon dots as capping agents, exhibit uniform morphology and remarkable SERS activity, achieving an enhancement factor of 4.97 × 105 for crystal violet under 532 nm laser excitation. The SERS enhancement is primarily attributed to photoinduced charge transfer between the Cu2O-NSs and analyte molecules, as confirmed by energy-level alignment studies. The substrate demonstrates excellent signal homogeneity, batch-to-batch reproducibility, and long-term stability, with no significant signal attenuation over 60 days. These findings underscore the potential of Cu2O-NSs as a cost-effective and stable SERS substrate, with promising applications in chemical sensing and molecular detection.
研究领域:
材料科学
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分析化学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
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IF 13.273
Donghui Kou,Ruicheng Lin,Chang Li,Shufen Zhang,Wei Ma
Bioinspired adaptive coloring strategies advance the investigation of responsive photonic crystal (PC) colors for environmental visual sensing, but are being encumbered by inherent strong angle-dependent structural colors of their highly ordered photonic microstructures. Herein, imitating hexagonal pit array on the elytral surface of a male beetle- Chlorophila obscuripennis and utilizing optically isotropic features of the unique concave axisymmetric geometry, biomimetic micro-sized bowl-array enabled angle-independent and flexible one-dimensional PC colors are first demonstrated based on transfer printing technique which is certified as a facile, energy efficient and universal nanofabrication strategy. The photonic films assembled by functional copolymers and inorganic oxides are successfully transferred onto bowls on the surface of polydimethylsiloxane, exhibiting flexible and brilliant pixel array-like non-iridescent colors. Even after being twisted and stretched, water-washing and rubbing, the nanomaterial-based photonic films on the bowls still show glossy and stable angle-independent colors, presenting powerful strengths for practical visual sensing. In practical terms, functional copolymers based PC films on the bowls are developed as humidity and organic solvents colorimetric sensors free of angles with desirable sensitivity, remarkable durability and repeatability. And integrating photonic multilayered films with different response features, multi-mode pattern displays are realized. The remarkable sensing and display applications reflect the high values of the novel bowls enabled angle-independent photonic color building strategy.
研究领域:
材料科学
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光学工程
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生物仿生学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Mengnan Qu,Qinghua Liu,Fan Shi,Yanqing Lv,Hui Liu,Leihuan Mu,Xiaofeng Liu,Jinmei He
Three-dimensional (3D) polyurethane (PU) sponges featuring high mechanical elasticity, compressibility , and durability have emerged as an ideal substrate for building wearable strain sensors. However, the 3D porous structures easily soak up rain, water vapor , sweat, etc., and the constructed sensor’s long-term conductivity may be eroded by droplets and experience irreversible damage, rendering the preparation of a wearable flexible sponge sensor with environmental adaptation challenging. Here, by reducing the Ag particles in the carbon nanotube (CNT) suspension, forming a conductive filler Ag-CNTs, and combining with poly (vinylidene fluoride) (PVDF) solution, surface modification with polydimethylsiloxane (PDMS) solution, the PDMS/Ag-CNT-PVDF/PU sponge sensor with 3D conductive network and superhydrophobic structure was fabricated. The results revealed that this modified sponge had a wide strain detection range of 0–80 %, superior conductive sensitivity up to 4.24 kPa −1 in 0–20 kPa, and a fast and stable response time (170 ms) with great reproducibility over 1200 compression-resilience cycles. Furthermore, good superhydrophobicity endows the sensor with remarkable resistance to mechanical wear and chemical corrosion, which can be effectively used to detect human motion in high air humidity environment. This PDMS/Ag-CNTs-PVDF/PU sponge sensor is expected to be used as a practical, flexible wearable sensor and demonstrates potential application prospects in complex environments.
研究领域:
材料科学
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传感器技术
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生物医学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Lijia Zhao,Shuang Ma,Huan Wang,Zekun Chen,Ren Wang,Guiye Shan
Hydrogel-based flexible sensors have attracted significant attention in the fields of motion sensing. However, the construction of hydrogel substrate with long-term stability for humid and sweating conditions sensing still remains challenging. Herein, tannic acid-modified copper sulfide nanoparticles (TA-CuS NPs)-based multifunctional hydrogel with excellent adhesion, mechanical strength, swelling ability and antibacterial properties was developed as wearable sensor for sensitive and durable motion monitoring in moist environments. The hydrogel, containing abundant phenolic hydroxyl groups, allows dynamic cross-linking with sodium alginate (SA) and polyacrylamide (PAM), improving tensile strain to 1590 % and adhesion strength to 32 kPa. Meanwhile, its electrical conductivity increased from 0.02403 S·m −1 to 0.11432 S·m −1 , attributed to the formation of conductive pathways and interfacial interactions between TA-CuS NPs and polymer chains. Additionally, the incorporation of ions and hydrophilic functional groups within the hydrogel imparts superior swelling behavior and ionic conductivity, which facilitates sweat adsorption and stable signal transmission. Further, the peroxidase-like (POD)-like activity of TA-CuS NPs-based hydrogel promotes the generation of hydroxyl radicals (·OH), effectively inhibiting the growth of both Staphylococcus aureus (88.0 %) and Escherichia coli (93.8 %) within 24 h. As a result, this multifunctional flexible hydrogel-based sensor, endowed with sweat management and antibacterial capability can achieve the real-time and reliable human motion monitoring in wet scenarios with the working range of 0–500 %, and can further combine with designed integrated circuit and Bluetooth for wireless signals output. This designed wireless system allows for the recognition of various motions and provides early warnings of harmful motions, demonstrating the potential for practical application in the field of wearable sensing.
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高影响因子
Journal of Materials Chemistry C
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2025
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IF 5.1
Yu Fu,Liujingzhou Li,Chao Ye,Leitao Cao,Jinrong Yao,Xin Chen,Shengjie Ling,Zhengzhong Shao
Silk fibroin hydrogels offer attractive biocompatibility and optical clarity but suffer from water-induced fragility, freezing, and biofouling. Here, regenerated silk networks are enzymatically cross-linked and subsequently exchanged with choline-chloride deep eutectic solvents (DESs) containing glycerol and ethylene glycol to create transparent, ionically conductive SF-DES gels. DES infusion preserves the protein’s β-sheet framework while generating a more homogeneous nanonetwork and denser microstructure, increasing compressive modulus by up to 70% without altering protein concentration. The low volatility and depressed freezing points of DESs impart exceptional durability: the glycerol-based gel loses <5 % mass under 37 °C, RH 35% airflow for 7 days, remains unfrozen at −80°C, and the ethylene glycol-based gel maintains flexibility and conductivity of 0.013 mS cm⁻¹ at −40 °C. Choline-based electrolytes inhibit growth of Escherichia coli and Staphylococcus aureus, mitigating microbial degradation. Leveraging this combination of mechanical resilience, environmental stability, ionic conductivity, and antimicrobial activity, bendable indium-free capacitive touch sensors are fabricated that achieve centimeter-scale position resolution and rapid gesture tracking. The study establishes DES infiltration as a general, aqueous-compatible route to robust, multifunctional protein gels, opening opportunities for sustainable wearable electronics, biomedical interfaces, and extreme-environment sensing.
研究领域:
材料科学
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生物医学工程
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柔性电子学
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高分子科学
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可持续技术
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Siyu Zheng,Afei Liu,Xianhui Zhang,Wenhui Wu,Lihui Chen,Chunmei Lai,Yuekun Lai,Kai Liu
Most hydrogels rely heavily on cryoprotectants to enhance their anti-freezing capabilities; however, this approach is often accompanied by disadvantages such as altered network structures and the risk of cryoprotectant leakage in aqueous conditions. Given these challenges, an environmentally resilient diode-like hydrogel is developed, featuring a double-layer coating design inspired by the physiological characteristics of penguins. This design is achieved through plasma treatment and immersion in 3-aminopropyltriethoxysilane/butyl acetate and perfluoropolyether carboxylic acid/butyl acetate solutions, constructing a double-layer coating with stable interfacial strength. The coating not only enhances anti-dehydration performance but also imparts anti-freezing properties via N,N-dimethylformamide solution. By carefully regulating the coating thickness and polymerization duration, it has optimized the mechanical and electrical attributes of hydrogel, culminating in robust performance even at −80 °C. The hydrogel exhibits exceptional water retention capabilities, with a mere 33.4% water loss rate following 7 days of air drying. Moreover, the hydrogel demonstrates stable piezoionic output performance across various low-temperature environments, with tensile and compressive strengths of 1156 kPa and 3.45 MPa, respectively. This study presents a novel solution for the application of conductive hydrogels in smart wearable devices, underscoring their potential for use in extreme environments.
研究领域:
材料科学
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柔性电子学
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可穿戴传感器
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能量收集
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仿生材料
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DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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2025
·Vol. 122
·期 13
·e2419507122
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IF 9.1
Vincent Mukwaya,Xiaolei Yu,Shuo Yang,Stephen Mann,Hongjing Dou
Liquid–liquid phase separation (LLPS) has been achieved in various cytomimetic (protocell) models, but controlling molecular condensation using noninert crowders to systematically alter protocell function remains challenging. Intracellular ATP levels influence protein–protein interactions, and dysregulation of ATP can alter cellular crowding dynamics, thereby disrupting the normal formation or dissolution of condensates. Here, we develop a membranized protocell model capable of endogenous LLPS and liquid–gel-like phase separation through precise manipulation of intermolecular interactions within semipermeable polysaccharide-based microcapsules (polysaccharidosomes, P-somes), prepared using microtemplate-guided assembly. We demonstrate that intraprotocellular diffusion-mediated LLPS can be extended into the liquid–gel-like domain by the uptake of the biologically active crowder ATP, resulting in a range of modalities dependent on the fine-tuning of molecular condensation. Endogenous enzyme activity in these crowded polysaccharidosomes is enhanced compared to free enzymes in solution, though this enhancement diminishes at higher levels of intraprotocellular condensation. Additionally, increased molecular crowding inhibits intraprotocell DNA strand displacement reactions. Our findings introduce an expedient and optimized approach to the batch construction of membranized protocell models with controllable molecular crowding and functional diversity. Our mix–incubate–wash protocol for inducing endogenous LLPS in membranized protocells offers potential applications in microreactor technology, environmental sensing, and the delivery and sustained release of therapeutics.
研究领域:
生物物理学
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合成生物学
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化学工程
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分子生物学
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DOI
PubMed
高影响因子
DYES AND PIGMENTS
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2022
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IF 5.122
Xiaozhen Xiao,Guiqiang Yang,Anbei Chen,Zhiyu Zheng,Chao Zhang,Yang Zhang,Liqiong Liao
In this work, deformable and chromatic hydrogel triggered by multi-stimuli was fabricated. This hydrogel was composed of N-isopropylacrylamide (NIPAAm), acryl-6-aminocaproic acid (A6ACA), and spiropyran (SP) derivatives, which possessed ferric ion (Fe 3+ ) and temperature-triggered shape deformations properties as well as chromatic behavior. Under ultraviolet light irradiation, the SP isomer in the hydrogel transformed to the merocyanine (MC) isomer, and the hydrogel showed the characteristic UV–Vis absorption peak of MC at 540 nm. The hydrogel revealed the selective chromatic response to Fe 3+ with the disappearance of the absorption peak of MC. Using ionoprinting technology, the hydrogel deformed programmatically in the presence of Fe 3+ . Moreover, owing to the anisotropic structure of the chromatic hydrogel, it realized reversible bending deformation triggered by temperature. The behaviors of hydrogels in response to dual stimuli (Fe 3+ and temperature) were further investigated, and the hydrogel showed programmable, spatiotemporal, and complex deformation behaviors , accompanying by the color change. This hydrogel will have great application potential in soft robotics, soft actuators, and environmental sensors.
研究领域:
材料科学
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化学
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软体机器人
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环境科学
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DOI
高影响因子
Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 48
·8170-8179
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IF 4.776
Yu Cheng,Chao Huang,Dian Yang,Kai Ren,Jie Wei
Bilayer-type hydrogel composites that respond to multiple stimuli provide a useful approach for manufacturing soft actuators and intelligent sensors. In this study, we propose two types of bilayer hydrogel composites (referred to as “N” type and “D” type). The “N” type and the “D” type separately consist of poly(N-isopropylacrylamide) (PNIPAM) and poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) bilayer hydrogels, with acrylamide (AM) as the co-monomer. The “N” type hydrogel composite exhibits oriented bending as temperature increases or as environmental salt concentration increases. The “D” type also presents oriented bending as temperature increases. Additionally, it demonstrates bending and changes color based on the pH of the surrounding solution, since it is doped with an acid-based pH-indicator. In a demonstration, we present several straight rods composed of a mixture of “N” and “D” type hydrogel composites that are able to morph into the letters “SOS” under environmental changes (temperature or pH). This can be used as a visual environmental indicator, or as an alarm. Furthermore, we show structures composed of a mixture of “N” and “D” composites imitating the flexible motions of a ballet dancer or a Tai Chi master. These mixed bilayer polymer composites may be used for applications in soft robotics, biomimetic devices, and environmental sensors.
研究领域:
材料科学
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软体机器人
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环境传感
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2025
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IF 6.7
Xiaoxia Han,Songying Qu,Zhanghong Zhou,Rui Zhao,Sui-Dong Wang,Hao Wu
Photoelectrochemical (PEC) biosensing has experienced a notable surge in recent years, while the introduction of plasmonic metal precursors with specific recognition functions into the detection interface remains a nascent area of study. Here, a thermally treated zeolitic imidazolate framework-8 (ZIF-8) decorated with zinc oxide nanorods, incorporating silver ions (Ag+@ZnO/ZIF-8-T), is constructed for the PEC detection of formaldehyde (HCHO) in biological systems. The ZnO/ZIF-8-T photoanode exhibits an unprecedented ability to harvest visible light, with significantly enhanced photoelectric signals compared to its ZnO and ZnO@ZIF-8 counterparts. Upon exposure to HCHO analytes, the incorporated Ag+ ions are in situ transformed into plasmonic Ag nanoparticles sensitized on the ZnO/ZIF-8-T surface, modulating the photoinduced electron injection as revealed by operando transient photovoltage spectroscopy. The proposed PEC platform demonstrates rapid, exclusive, and sensitive HCHO detection with a detection limit of 50 nmol·L–1. This work introduces a new strategy of employing plasmonic metal ions as recognition nodes to couple analyte specificity with photoinduced charge-transfer modulation, opening new avenues for the design of advanced PEC biosensors.
研究领域:
光电化学
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环境传感
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纳米材料
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生物传感器
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2025
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IF 5.2
Chunli Li,Zikai Zheng,Shiren Huang,Sujin Zheng,Linyun Zeng,Masrur Khodiev,Utkirjon Holikulov,Mekhrdod S. Kurboniyon,Chunyan Zhou,Jialiang Pan,Xinguo Zhang
Carbon dots (CDs), as emerging fluorescent carbon nanomaterials, boast exceptional optical properties and hold significant potential for various applications. In this study, novel dual-emissive red carbon dots (R-CDs) were synthesized from o -phenylenediamine (oPD) and 2, 2′-dithiobisbenzoic acid (DTSA) in ethanol, exhibiting emission wavelengths at 600 and 650 nm and a high photoluminescence quantum yield (QY) of 30.64 %. Notably, R-CDs exhibit excellent photostability, solvent-dependent fluorescence, and excitation wavelength-independent fluorescence properties. Based on liquid chromatography-mass spectrometry (LC-MS) and the 1 H nuclear magnetic resonance spectra ( 1 H NMR), the luminescent mechanism of R-CDs was systematically investigated to verify that 5,14-dihydroquinoxalinolo[2,3-b] phenazine (DHQP) is the fluorophore of R-CDs and a possible structural formation pathway has been proposed. For application testing, R-CDs demonstrated high sensitivity and selectivity toward Pb 2+ and Fe 3+ , exhibiting good linearity in the concentration ranges of 0–40 μM and 0–60 μM, with the detection limits (LOD) of 0.086 μM and 0.265 μM, respectively. Due to their polarity sensitivity, R-CDs can function as fluorescent sensors for detecting water content in organic solvents. Meanwhile, according to the sensitivity of R-CDs to Fe 3+ , an on-off-on fluorescent sensor was developed to detect F − , L-cys and EDTA with LOD of 9.446, 0.413 and 0.078 μM, respectively. Therefore, this study not only develops novel dual-emissive red carbon dots, but also establishes the foundation for the subsequent advancement of fluorescent sensors.
研究领域:
材料科学
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分析化学
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纳米技术
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环境传感
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荧光光谱学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Yang Gao,Mingyang Sun,Hanhan Liu,Chenyi Su,Tuo Zhang,Hao Zhang,Chenyan Lv
Protein-templated gold nanoclusters (Au NCs) are promising fluorescent nanomaterials owing to their biocompatibility, stability, and eco-friendly synthesis. CMd, a cysteine-rich subunit of the barley α-amylase/trypsin inhibitor tetramer, is well-suited as a protein template due to its high thiol content. However, native CMd (nCMd) interacts with polyphenolic compounds, potentially altering its structure and function. To enable direct comparison, recombinant CMd (rCMd) was heterologously expressed in E. coli . Spectroscopic analyses (UV–Vis, fluorescence, CD, and FTIR) revealed pronounced structural differences: nCMd displayed extensive polyphenol binding and markedly lower surface hydrophobicity. Both proteins were further employed as templates for gold nanoclusters (Au NCs) synthesis. rCMd-Au NCs exhibited a higher fluorescence quantum yield (∼8.2 %) and enabled ultrasensitive Hg 2+ detection with a detection limit of 2.95 nM (3σ). The rCMd-Au NCs probe also achieved reliable visual detection of Hg 2+ in Chinese herbal medicines, including Astragalus and Codonopsis . Overall, this study demonstrates the impact of polyphenol binding on CMd structural and functional properties and expands the application potential of CMd-based systems in bioanalytical sensing.
研究领域:
纳米技术
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生物化学
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分析化学
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植物生物化学
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环境传感
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DOI
高影响因子
危险品化学品经营许可证（带存储）