JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Min Sun,Xujie Wang,Lingwei Bu,Yawen Fan,Zihan Guo,Yingying Shan,Xiao Zhu,Lei Hu,Zhengquan Yan
Herein, a novel Bi 3+ -doped Au-Ag quantum dot (Bi 3+ -Au-Ag QD) system was synthesized, by homogeneous reduction method using AgNO 3 , Bi(NO 3 ) 3 ·5 H 2 O and HAuCl 4 ·4 H 2 O as raw materials, for multi-channel detection of S 2− in agricultural foods. Owing to the strong interaction between S 2− and the Ag/Au components, trace amounts of S 2− led to the formation of Ag 2 S or Au 2 S sulphides on the surface of the Bi 3+ -Au-Ag QDs. This surface modification altered the intrinsic fluorescence property of QDs, and their catalytic ability to the oxidization of colourless 3,3′,5,5′-tetramethylbenzidine (TMB) into its blue oxide (oxTMB), resulting in noticeable changes in spectral responses, colour and RGB values. Under optimised experimental conditions, Bi 3+ -Au-Ag QDs were employed successfully for ‘turn-on’ fluorescence, UV–vis and smartphone-assisted red-green-blue (RGB) detection of S 2− in real agricultural food samples. The limits of detection –4.75 × 10 −10 , 6.48 × 10 −9 and 7.22 × 10 −9 mol·L −1 respectively, well met the safety threshold set by the World Health Organization.
研究领域:
分析化学
·
纳米技术
·
食品安全
·
环境监测
·
光学传感
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2026
·
IF 10.4
Tingting Yan,Shuping Gao,Jiaxin Yang,Zexi Gao,Weixuan Zhang,Hailing Gan,Zhiguo Li,Wenzhi Tang,Zhonghong Li
Wavelength-selection-free detection (412–715 nm) without prior spectral knowledge. • Automatic recognition enables sample-in-answer-out detection without calibration. • Miniaturized instrumentation (~200 g) achieved via RGB sensor and LED integration. • Cost reduction (thousands → ~$10) with 92.32–107.03% accuracy vs. lab instruments. • HSV-RGB algorithm enables user-friendly, decentralized detection in remote areas. Colorimetric analysis is widely used in food safety but limited in field deployment by bulky instruments and manual wavelength calibration. Herein, we present a portable, low-cost colorimetric device enabled by a bioinspired HSV-RGB fusion algorithm that autonomously identifies analytes and quantifies concentrations without user-defined parameters. Hue ( H ) served as a spectral fingerprint, and RGB values followed the Lambert-Beer law, which was validated across six wavelengths (412, 426, 486, 500, 630, and 715 nm). The device showed high linearity (R 2 > 0.99) with LODs of 6.25 ppb (pesticide), 0.027 mg mL −1 (glucose), and 0.03 μg mL −1 (phosphate), calculated via 3σ/slope, achieving sensitivity comparable to spectrophotometry. In real food samples, measured concentrations agreed with those from the reference spectrophotometric method within 92.32% to 107.03%, confirming its accuracy. Weighing ~200 g and costing ~$10, it enables sample-to-result detection and offers a field-deployable solution for on-site food safety monitoring, particularly in resource-limited settings.
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Yanlong Zhao,Fan Lan,Yunrui Li,Ya Huang,Fei Wang,Kangkang Wang,Rufan Zhang
The immense potential of electronic textiles for wearable applications has spurred extensive research into luminescent fibers suitable for smart textile displays. However, current electroluminescent (EL) fibers, while flexible and wearable, typically emit only a fixed color and have a 1D structure, which confines fiber-based displays to pre-designed patterns. Here, a coaxial hierarchical fiber structure is fabricated with an insulating polymer layer sandwiched between an EL core and an electrochromic (EC) shell based on carbon nanotube fibers. Acting as a dynamic optical filter with RGB tri-state switching capabilities, the EC shell can effectively modulate the optical properties of inner emitted lights via a low voltage, enabling a new “electroluminochromic” fiber with multicolor luminescence and rapid on-demand color switching. Moreover, electroluminochromic bare fibers can be woven with orthogonal electrodes at discrete gel polymer electrolyte junctions, forming individually addressable luminescent pixels. Using a warp-weft knitting approach and integration with the Internet of Things, this display textile can transmit information, exhibiting great potential for applications in smart displays and wearable electronic devices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Gongle Shen,Linling Zhong,Yuanhang Bi,Yifan Liu,Jiangqi Zhao,Xin Wen,Yifei Zhu,Lei Feng,Li Geng,Fan Yu,Changjun Hou,Xianfeng Wang
Considering the vital role of sulfide ions (S 2- ) in food safety, environmental pollution and public health, accurate and efficient detection of S 2- is of great importance. In this study, Er-MOFs with the structure of four-pointed star was successfully designed and synthesized using Er(III) as the metal center and TCPP as the ligand. It is found that host-guest effects occur between Er-MOFs and S 2- , blocking the ligand-to-metal charge transfer (LMCT) effect and O-H vibration. This progress leads to the fluorescence signal-on of Er-MOFs and the production of a brown color. In view of this, a Er-MOFs-based sensor was constructed for rapid and on-site monitoring of S 2- in water, which shows the triple-signal outputs including fluorescence, absorbance and smartphone-based RGB analysis with high sensitivity and selectivity. More importantly, the successful measurement of S 2- in real water samples with satisfactory recoveries from 96.26 % to 104.03 %, demonstrating the practicality and effectiveness of Er-MOFs for S 2- recognition. Overall, this assay exhibits the promising applications for S 2- measurement in the fields of environmental pollution and food safety.
研究领域:
材料科学
·
环境科学
·
食品安全
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2016
·Vol. 3
·期 8
·1082-1090
·
IF 4.532
Min Li,Xiaoyang Liu,Li Liu,Bing Ma,Benxian Li,Xudong Zhao,Wenming Tong,Xiaofeng Wang
A series of Yb3+/Tm3+ co-doped β-NaYF4 (β-NaYF4:Yb,Tm) crystals have been successfully synthesized via the molten salt synthesis (MSS) method. A unique strong green emission of Tm3+ was observed, which cannot be obtained by any other method. The red, green and blue (RGB) light emissions have been obtained simultaneously in the presence of a single activator (Tm3+). The influencing factors of crystal growth have been studied in detail, in order to understand the change of the transition probabilities of Tm3+. Subsequent studies indicate that the RGB light emissions of Tm3+ can be effectively tuned by varying the concentration of sensitizers (Yb3+ and Mn2+) and the reaction time. Consequently, the effective multicolor upconversion (UC) luminescence was obtained, especially a strong white light, which was not obtained in the β-NaYF4:Yb,Tm system earlier. To our knowledge, it is the first time that the UC properties in the β-NaYF4:Yb,Tm system have been investigated by altering the transition probabilities at the same energy level of Tm3+.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Xiujuan Li,Ziyu Han,Dong Wang,Yi Luan
Polymer-stabilized cholesteric liquid crystals (PSCLCs) are promising materials for reflective displays owing to their wavelength-selective reflection and bistable optical properties. However, the fabrication of full-color PSCLC devices typically relies on multilayer assembly or repeated alignment processes, leading to complicated fabrication, long processing times, and limited patterning precision. Herein, we report an etching-guided chiral diffusion strategy for fabricating single-layer RGB PSCLC devices. Selective laser etching spatially defines chiral polymer reservoirs, enabling localized release and diffusion of chiral molecules into the cholesteric liquid crystal layer for precise modulation of the helical pitch. By programming the chiral diffusion profiles, red, green, and blue reflective domains with distinct structural colors are generated within a single PSCLC layer, enabling spatially patterned multicolor displays. Furthermore, the wavelength-selective reflection characteristics of the cholesteric structure allow the integration of spectrally encoded optical encryption and anti-counterfeiting functions. A full-color reflective prototype device with independently addressable pixels is further demonstrated, achieving electrically controlled dynamic pattern switching through a partitioned driving matrix. This work presents a simple and versatile strategy for fabricating single-layer RGB PSCLC devices, providing a platform for reflective displays, optical information encryption, and anti-counterfeiting applications.
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2020
·Vol. 13
·期 6
·809-816
·
IF 2.596
Rui Li,Yanan Sun,Lihua Jin,Xiaohong Qiao,Cong Li,Yehua Shen
With the rapid development of point-of-care (POC) technologies, development of sensitive method featured with fast analysis and affordable devices has become an emerging requirement for practical applications. In this study, we introduced a smartphone-based RGB analysis system for the sensitive detection of acid phosphatase (ACP) enzyme activity. In the presence of ACP, L-ascorbic acid 2-phosphate (AAP) can be converted into ascorbic acid (AA), which can reduce Ag+ to Ag0 and format the Au@Ag core–shell nanostructure. This morphology change of the Au@Ag core–shell would trigger a significant color variation (pink to yellow). A good linear relationship between the RGB model parameter and the concentration of ACP could be obtained with a detection limit of 0.1 U L−1. Moreover, this sensing strategy is suitable for the detection of ACP in practical serum samples. Thus, this simple but powerful protocol has great potential application for on-site detection of ACP in future complex biological samples.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Guan Jie,Ma Jianhang,Zhou Likuan,Zou Yihao,Ye Lingbin,Hou Wenjun,Zhang Pan-ke,Dai Xingliang,Zhang Hao,Talapin Dmitri V.,Wang Yuanyuan
Optical patterning of quantum dots is essential for the fabrication of light-emitting diodes displays. However, current patterning methods either require inert environments or compromised quantum dots optical properties under ambient conditions. Here, we report a photoresist-free strategy enabling direct quantum dot patterning in air by using triphenylphosphine, a cost-effective, commercially available molecule that functions simultaneously as a surface ligand, photoinitiator, and oxidation protector. Under light exposure, triphenylphosphine reacts with atmospheric oxygen to trigger solubility changes, allowing precise patterning with resolutions up to 9534 dpi. The resulting devices exhibit external quantum efficiencies of 21.6% (blue), 25.6% (green), and 20.2% (red). We further demonstrate full-color active-matrix quantum dots light-emitting diodes displays by integrating the patterned red, green and blue quantum dots with thin-film transistor backplanes. This work offers a scalable, non-destructive, and environmentally compatible patterning solution for industrial display technologies.
研究领域:
材料科学
·
光电子学
·
显示技术
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2025
·
IF 14.1
Guannan Zhang,Zhao Sun,Zhuofei Gan,Chuwei Liang,Liyang Chen,Hongbo Mo,Yuanzhi Jiang,Mingjian Yuan,Aleksandra B. Djurišić,Ji Tae Kim,Wen-Di Li
Halide perovskite single crystals have demonstrated enormous potential for next-generation integrated optoelectronic devices. However, there is a lack of a facile method to realize the controllable growth of large-scale, high-quality, and high-resolution perovskite single crystal arrays on diverse types of substrates, which hinders their application in practical scenarios. Here, a one-step wettability-guided blade coating approach is reported for the rapid in situ crystallization of large-scale, multicolor, and sub-100 nm perovskite single-crystal arrays in the ambient environment. By this strategy, the physical dimensions of perovskite single crystals can be precisely regulated from 90 to 260 nm, with a size variation coefficient < 10% and an area of over 900 mm 2 . All three typicalhalogen perovskites for multi-color luminescence, CsPbX 3 (X = Cl, Br, I) and their mixtures (Cl/Br or Br/I systems), are appliable to this fabrication process through the demonstration of complex RGB patterns with remarkable photoluminescence properties. Moreover, various rigid substrates such as silicon oxide (SiO 2 ), silicon (Si), and glass can also be used to construct the wettability-constrast templates where perovskite crystal nucleate and grow. After that, the perovskite single-crystal arrays or complex patterns can be transferred onto flexible substrates, for instance, COC. This method combines convenient solution processing with conventional photolithography to prepare the high-resolution, large-area, and superior-quality perovskite single crystal arrays in a high-throughput manner, showing great potential in the integration of perovskite nano-optoelectronic devices and chips.
研究领域:
材料科学
·
光学工程
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2023
·
IF 6.6
Jialing Tan,Jiayin Liu,Juanjuan Sun,Yunjie Yin,Chaoxia Wang
Thermally responsive photonic crystals (TRPCs) are intelligent responsive materials that can dynamically coordinate electromagnetic wave transmission, translating thermal stimuli into optical signals and structural color changes. However, it remains a big challenge to develop a robust TRPC, because of the thermochromic mechanism of unstable dramatic volume change that collapses photonic crystal (PC) structure. We demonstrate a highly robust and flexible TRPC film inspired by the chameleon, combining thermochromic dyes (TDs) with PC for a synergistic response. There is only negligible color fluctuation even after 2000 color-change cycles, attributing to no lattice parameter change during the thermal stimulus. Moreover, both positive (transparency to opaque color) and negative (opaque color to transparency) TDs are introduced into TRPC, implementing a full-color RGB thermally-responsive system. The response of the positive-TRPC and negative-TRPC temperatures were 32.0 and 50.5 °C, respectively. A TRPC film with environmental adaptability was designed, which offers a promising route to anti-counterfeiting, steganography and smart window.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2025
·
IF 3.3
Yingyi Wu,Yanchun Li,Qian Guo,Yang Chen,Dongming Song,Aifeng Jiang
Diethylene glycol dinitrate(DEGDN) propellant, as a key material for the power source of weapon systems, the research on its aging characteristics is of great significance for ensuring the safety and reliability of weapons. This study systematically analyzed the thermal reaction mechanism of DEGDN propellant using the thermogravimetry-differential scanning calorimetry-quadrupole mass spectrometry (TG-DSC-QMS), and investigated the changes in the components of DEGDN propellant under humidity and temperature aging conditions by using high-performance liquid chromatography (HPLC). The results show that during the humidity and temperature aging process, the main aging characteristics of the DEGDN propellant are the continuous loss of nitrate ester plasticizers. Among them, the consumption rate of DEGDN is the fastest, followed by nitroglycerin. Further research revealed a significant linear correlation between the color change of the extraction solution and the loss of components in the propellant. Based on this, this study established a quantitative relationship model between the content of DEGDN and the RGB parameters of the propellant solution, providing a new idea and feasible research direction for the rapid detection of propellant components.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Aggregate
·
2025
·
IF 13.7
Bin Liu,Genghong Huang,Yaling Wang,Huijie Bai,Suping Jia,Fu-de Ren,Xinghong Zhang
Carbon dots (CDs) have emerged as a promising platform for constructing optoelectronic devices. However, the synthesis of multicolor CDs with high quantum yield (QY) and the elucidation of their luminescence mechanisms remain challenges. Here, we successfully synthesize RGB-CDs by precisely controlling the ratio of o -phenylenediamine and phytic acid. The QYs of the RGB-CDs are up to 60.3%, 68.7%, and 19.0%, respectively. Experimental data and DFT calculations reveal that the fluorescence emission of the RGB-CDs originates from molecule state (5,14-dihydroquinoxalino[2,3- b ] phenazine), carbon core state, and clusteroluminescence state induced by the through-space interactions of heteroatom groups, respectively. Moreover, leveraging the outstanding fluorescence properties of the RGB-CDs, we fabricate both a white light-emitting diode (WLED) with an ultra-high color rendering index of 98 and a luminescent solar concentrator achieving a high power conversion efficiency of 1.6%. Finally, we integrate a self-powered lighting system combining the WLED and LSC, which provides approximately 6 h of continuous illumination to a 0.1 W WLED after a single day's charging. Our results demonstrate a facile method for preparing multicolor CDs with high QYs, enabling their use as phosphor sources for various optoelectronic device applications.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）