JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Xiaoyu Zhang,Yaoquan Gu,Binni Huang,Can Weng
The emerging field of structural coloration, using the intricate interactions between light and engineered micro/nanostructures, is increasingly recognized for its transformative potential in advanced sensing technologies, anti-counterfeiting measures, and intelligent displays. Especially the structural color generated by precise micro and nanostructures has a high sensitivity to external environmental changes and has great advantages for application in sensing. This study uses time-domain finite element modeling in tandem with comprehensive chromaticity analysis to investigates the progression of color transitions in polymer-based grating structures, with an emphasis on enhancing sensitivity to subtle chromatic variations. A polystyrene (PS) grating structure was fabricated by injection molding process to investigate the performance of organic vapor detection by grating structure on the experimental platform of gas detection. The investigative findings reveal that the grating depth significantly dictates the colorimetric response, overshadowing the influence of the duty cycle and spatial period. In acetone vapor atmosphere, the PS grating structure can achieve accurate color response as little as 1 min, and when the acetone structural color is fully reactive, the sensitivity can reach a maximum of Sg = 7.2 × 10 −4 ppm −1 , that demonstrated superior performance in detecting high concentrations of acetone vapor showcasing pronounced stability and consistent repeatability. These characteristics suggest its strong potential for deployment in reliable and robust sensing modalities.
研究领域:
材料科学
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光学工程
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传感器技术
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产品关联
DOI
PubMed
高影响因子
Scientific Reports
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2016
·Vol. 6
·期 1
·1-11
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IF 5.228
Leng Yumin,Fu Ling,Ye Liqun,Li Bo,Xu Xiumei,Xing Xiaojing,He Junbao,Song Yuling,Leng Chaoliang,Guo Yongming,Ji Xiaoxu,Lu Zhiwen
An in-situ reduction method has been reported to prepare gold nanoparticles (GNPs) of 40–110 nm by using the green reducing agents of proteins, which are activated by H 2 O 2 and the superoxide anion ( ). The protein of collagen turns HAuCl 4 to the aqueous Au(I) ainions, which are further reduced by other proteins to be highly monodispersed and spherical GNPs of different sizes. The GNPs reduced by different proteins are found to be with the exposed {100} facets, the distinctive UV-vis absorption spectra and various colors (See Fig. 1 ). By means of extracting the color responses, such as red, green and blue (RGB) alterations, an in-situ reduction method-based multidimensional sensing platform is fabricated in the process of GNPs synthesis. Without further modification of GNPs, nine common proteins are found to be well detected and discriminated at different concentrations. Moreover, this sensing platform also demonstrates great potentials in qualitative and semiquantitative analysis on the individuals of these proteins with high sensitivity. Furthermore, the validation of this multidimensional sensing platform has been carried out by analysis on the spiked proteins in human urine and the target proteins in complex matrix (e.g. lysozyme in human tear). ( a ) Schematic illustration of an in-situ reduction method to synthesize monodispersed and spherical GNPs by using proteins, the reducing power of which activated by H 2 O 2 and the superoxide anion ( ). ( b ) The distinctive colors of as-synthesized GNPs reduced by different proteins.
研究领域:
生物化学
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纳米医学
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分析化学
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产品关联
DOI
PubMed
高影响因子
TALANTA
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2016
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IF 4.035
Jie Tang,Peng Wu,Xiandeng Hou,Kailai Xu
A facile yet sensitive and selective method was proposed for Hg 2+ detection based on N-acetyl-L-cysteine(NAC)-induced colorimetric response of AuNPs. The proposed method can be easily performed by introducing the premixing of NAC and Hg 2+ into as-prepared citrate-capped AuNPs solution. A combination of experimental and theoretical studies was applied to illustrate the mechanism of this AuNPs colorimetric system. The strong interaction of NAC and AuNPs through Au–S bond could lead to the aggregation of AuNPs, but the formation of NAC-Hg-NAC complex decreased the affinity between NAC and AuNPs and resulted in an anti-aggregation effect. Therefore, the color of the AuNPs solution would progress from purple to red with the increase of Hg 2+ concentration. The proposed method had a high sensitivity with a limit of detection of 9.9 nM. Coexistent metal ions , including Cd 2+ , Mn 2+ , Al 3+ , Ag + , K + , Mg 2+ , Ca 2+ , Cr 3+ , Cu 2+ , Fe 3+ , Pb 2+ , Ni 2+ and Zn 2+ , did not interfere with the detection of Hg 2+ . This method can be used to monitor Hg 2+ in tap water.
研究领域:
分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
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2019
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IF 5.839
Jingrong Liu,Hualin Wang,Min Guo,Linlin Li,Minmin Chen,Suwei Jiang,Xingjiang Li,Shaotong Jiang
This study was to design a novel wide pH–sensing colorimetric film of κ-carrageenan incorporated with extract from Lycium ruthenicum Murr. (Car-LRM) for food freshness monitoring. The structure, basic properties (thermal stability, mechanical, barrier and antioxidant activity), and release kinetics of LRM from the films were investigated. Attentions were centered on colorimetric response of films and their applications for freshness monitoring of milk and shrimps. A low incorporation of LRM (no more than 2.5%) led to an enhancement in thermal stability and water vapor barrier of films to a certain extent. At above level of incorporation, LRM could be well-distributed in Car matrix by the interactions of hydrogen bonds. In addition to good antioxidant activity , the film displayed colorimetric response at a wide range of pH (2−10) and the color change was reversible. The release of LRM from films followed Fickian's law which was controlled by diffusion mechanism rather than swelling mechanism. The successful applications of Car-LRM2.5 for the freshness monitoring of milk and shrimps indicate that Car-LRM2.5 may have great potential for monitoring the freshness of milk and aquatic products.
研究领域:
食品科学
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材料科学
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产品关联
DOI
高影响因子
Nanomaterials
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2022
·Vol. 12
·期 5
·736
·
IF 5.719
Yarong Xue,Mingfen Wei,Dingyi Fu,Yuqing Wu,Bo Sun,Xianghui Yu,Lixin Wu
We report a unique phenomenon, the opposite color response of a giant polyoxometalate, (NH4)42[Mo132O372(CHCOO)30] (H2O)72([Mo132]), to the existing states of human papillomavirus (HPV) major capsid protein, L1-pentamer (L1-p), and virus-like particles (VLPs). The color responses originate from the different assembly forms between [Mo132] and the capsid protein. The latter were inspected and separated by using CsCl gradient centrifugation, and validated in detail by sodium dodecyl sulfate-polyacrylamide gel-electrophoresis (SDS-PAGE), dynamic light scattering (DLS), and transmission electron microscopy (TEM) imaging. Furthermore, the intrinsic mechanisms were investigated in-depth by using XPS-based semi-quantitative analysis and well-designed peptides, revealing the critical points of L1 that determine the charge–transfer ratio between Mo(V) to Mo(VI), and consequently, the levels of [Mo132] hypochromic in different assemblies. Such a unique phenomenon is significant as it supplies a colorimetry approach to distinguish the existing states of the HPV capsid protein and would be significant in the quality assay of the HPV vaccine and existing states of other viruses in the future.Keywords:colorimetric discrimination;giant polyoxometalate;HPV capsid protein;hypochromic of molybdate clusters;opposite color response
研究领域:
化学
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病毒学
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材料科学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2025
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IF 7.7
Mengjie Li,Tingting Han,Huiwen Liu,Juan Xu,Chong Sun,Yongzhi Zhu,Weimin Xu,Daoying Wang
In this work, an intelligent and sensitive polyvinyl alcohol-acidochromic chitosan (PVA-ACS) nano-sensing label was developed for visually monitoring meat freshness. Based on the synthesis of 1-hydroxy-4-[4-(ethylsulfurate sulfonyl)-phenylazo]-naphthalene (HESPN), ACS was prepared through hydrogen bonding between the sulfonic acid groups in HESPN structure and the hydroxyl groups in chitosan (CS). Herein, PVA was used as the functional matrix and electrospinning technology was employed in this process. The chemical structure, surface morphology, mechanical properties, hydrophilicity, thermal stability, and biocompatibility of PVA-ACS nano-sensing label were investigated. Moreover, the PVA-ACS nano-sensing label exhibited sensitive color responsiveness and reversible color switching, and the properties enabled the naked-eye inspection of meat freshness during production, processing and transportation. Furthermore, a strategy incorporated the nano-sensing labels with a smartphone was developed to record color information in conjunction with the color recognition software (ColorColl). This work provided a valuable perspective for real-time freshness monitoring with high satisfaction and efficiency, opening new possibilities for meat quality grading.
研究领域:
食品科学
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生物材料
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纳米技术
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智能传感
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包装工程
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食品安全
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高分子化学
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肉品质量控制
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产品关联
DOI
高影响因子
Current Research in Food Science
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2022
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IF 6.269
Yang Lin,Cong Li,Ping Shao,Ligang Jiang,Bilian Chen,Mohamed A. Farag
Anthocyanins (ACNs) as one category of water-soluble flavonoid pigments are increasingly employed in pH sensing indicator applications for monitoring food freshness. Nevertheless, considering that anthocyanins are sensitive to environmental factors, their practical applications in food industries are still rather limited. In order to improve the stability of anthocyanins and capitalize upon their application in pH-color responsive intelligent packaging, this study aims to graft octanoic aid onto raspberry anthocyanins catalyzed by immobilized Candida antarctica lipase B (Novozymes 435). Structural analyses based on Fourier transform infrared spectroscopy (FTIR), UV–Vis, liquid chromatography-mass spectrometry (LC-MS), and nuclear magnetic resonance (NMR) revealed that octanoic acid was regioselective grafted onto the 6-OH position of its glucoside. The acylation efficiency of C3G by octanoic acid up to 47.1%. The octanoic acid moiety was found to improve lipophilicity, antioxidant activity and stability of C3G. In addition, acylated derivative also maintained the pH-color response characteristics of nature ACNs and exhibited excellent NH 3 response properties. These results indicated that acylated anthocyanins exhibit potential application as intelligent packaging indicator for monitoring food freshness.
研究领域:
食品科学
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化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
FOOD HYDROCOLLOIDS
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2024
·
IF 11
Yuan Wu,Bing-hang Li,Miao-miao Chen,Liu Bing
Due to the highly porous (≈ 96%), lower density (50.71±2.07 mg/cm 3 ) structure of aerogels, which gives them excellent adsorption and release of substances. Furthermore, aerogel-based intelligent, active food packaging may have higher sensitivity than film-based packaging, thus arousing the interest of researchers. In this study, an aerogel was prepared from gelatin, gum Arabic, curcumin, and nisin (GG-cur@Nisin) to achieve the dual functions of spoilage detection and freshness preservation. Scanning electron microscopy observations verified that an interpenetrating polymer network was formed in GG-cur@Nisin. Infrared spectroscopy and X-ray diffraction showed that curcumin and nisin were physically embedded in the aerogel matrix and that van der Waals forces were the main intermolecular interactions. The GG-cur@Nisin aerogels displayed lower density (50.71 ± 2.07 mg/cm 3 ), higher water vapor absorption capacity (0.20 g/g), and lower solubility than films of identical composition. The water contact angle results also showed that the aerogels (90.3° ∼ 92.7°) have more hydrophobic surfaces than the films (51.5° ∼ 61.1°). The GG-cur@Nisin aerogel performed better than the corresponding film in the colorimetric response to 2500 ppm ammonia solution and displayed a sensitive color change to spoilage in shrimp and pork. When used as padding material, the GG-cur@Nisin aerogel can extend the shelf life of pork at 25 °C by up to 6 h. Therefore, the aerogels developed in this study have great potential to ensure food quality and inspire new ideas for intelligent, active packaging.
研究领域:
食品科学
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材料科学
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包装技术
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产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
·
2019
·
IF 5.839
Min Guo,Hualin Wang,Qian Wang,Minmin Chen,Linlin Li,Xingjiang Li,Shaotong Jiang
Recently, colorimetric films with antibacterial or antioxidant activity have received growing attentions. In this work, novel intelligent double-layer fiber mats were developed via electrospinning technique for pork freshness monitoring and preservation. The mats are composed of a layer of pullulan-purple sweet potato extract (PL-PSPE) and a layer of zein-glycerol-carvacrol (ZN-GL-CA). The colorimetric response and antibacterial activity were respectively dependent on the mats of PL-PSPE and ZN-GL-CA, while the antioxidant activity was ascribed to both of them. The distinguishable color changes of PSPE at pH 2–12 endowed the mats with a wide pH–sensing range. Each component of PL-PSPE and ZN-GL-CA were hydrogen bonded. An appropriate presence of GL (no more than 20%) could improve the thermal stability of the fibers. The releases of PSPE and CA from fiber matrix were controlled and followed Fickian diffusion mechanism. In addition to the reversible and high sensitive color change, the mats showed good antibacterial and antioxidant activities, which could extend the shelf life of pork by 24 h at 25 °C. This study demonstrated the great potential of [email protected] in food freshness monitoring and preservation.
研究领域:
食品科学
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材料科学
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生物技术
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产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Peng Dai,Wenyun Su,Zhaokun Xian,Xiangfu Wei,Shengchang Tang,Guangyong Huang,Cuimin Sun,Wei Han,Ling Zhu,Hui You
Developing a rapid fabrication method for crack-free opal films is a significant challenge with broad applications. We developed a microfluidic platform known as the “filter paper-enhanced evaporation microfluidic chip” (FPEE-chip) for the fabrication of photonic crystal and inverse opal hydrogel (IOPH) films. The chip featured a thin channel formed by bonding double-sided adhesive poly(ethylene terephthalate) with a polymethyl methacrylate cover and a glass substrate. This channel was then filled with nanosphere colloids. The water was guided to evaporate rapidly at the surface of the filter paper, allowing the nanospheres to self-assemble and accumulate within the channel under capillary forces. Experimental results confirmed that the self-assembly method based on the FPEE-chip was a rapid platform for producing high-quality opal, with centimeter-sized opal films achievable in less than an hour. Furthermore, the filter paper altered the stress release mechanism of the opal films during drying, resulting in fewer cracks. This platform was proven capable of producing large-grain, crack-free opal films of up to 30 mm2 in size. We also fabricated crack-free IOPH pH sensors that exhibited color and size responsiveness to pH changes. The coefficient of variation of the gray color distribution for crack-free IOPH ranged from 0.03 to 0.07, which was lower than that of cracked IOPH (ranging from 0.07 to 0.14). Additionally, the grayscale peak value in 1 mm2 of the crack-free IOPH was more than twice that of the cracked IOPH at the same pH. The FPEE-chip demonstrated potential as a candidate for developing vision sensors.
研究领域:
材料科学
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纳米技术
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传感器
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微流控
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光子学
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DOI
PubMed
高影响因子
Polymer Chemistry
·
2020
·Vol. 11
·期 22
·3762-3767
·
IF 5.342
Li Zhang,Shuanghong Li,Yanan Sun,Keren Xiao,Gang Song,Pingan Lu,Shutao Yin,Kunlun Huang,Zhiyi Yao
Flavin mononucleotide (FMN) is well known as a cofactor of riboflavin and plays key roles in metabolisms. Self-assembly is one of the most important approaches for maintaining the biological functions of FMN. In this work, a supramolecular self-assembly nano-system driven by non-covalent interactions between a water-soluble polythiophene (PMT-1) and FMN is constructed in 100% aqueous solution. In this system, π-stacked nano-aggregates have been formed and the self-assembly process of PMT-1 and FMN has been explored through UV-Vis, fluorescence, and circular dichroism (CD) spectroscopy. The synergistic effect of non-covalent interactions containing electrostatic, hydrophobic and π–π interactions is proposed to account for the formation of PMT-1/FMN nano-superstructures. Furthermore, colorimetric responses of PMT-1 promote the sensing applications of this approach for the rapid and visual detection of FMN. It features wide detection range, fast response, high sensitivity and selectivity. The LOD in buffer and actual sample could be as low as 1.1 and 32 nM, respectively.
研究领域:
材料科学
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分析化学
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纳米技术
·
光谱学
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DOI
高影响因子
危险品化学品经营许可证（带存储）