ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Juan Gao,Qin Gao,Jiangshun Huang,Xueli Geng,Pengzhan Li,Yihang Liu,Qiaofeng Yang,Hao Zhang,Mei Wang,Zhisong Xiao,Paul K. Chu,Ruifeng Lu,Anping Huang
Low-power and color-sensitive neuromorphic vision systems are critical to the next generation of intelligent devices. Here, we report a coral-inspired, lead-free synaptic device based on Cs3Bi2Br9 perovskite nanocrystals prepared by centrifugal casting into a porous thin film. The device exhibits wavelength-dependent plasticity under 405, 520, and 635 nm illumination without an external bias. By modulating the light wavelength and intensity, short-term and long-term synaptic plasticity are achieved to mimic excitatory, inhibitory, and saturating biological responses. Structural and spectroscopic analyses reveal that bromine vacancies play a key role in the dynamic modulation of carrier transport and plasticity evolution. The efficient preprocessing of RGB visual information significantly enhances recognition accuracy in artificial neural network devices. This wavelength-specific modulation of synaptic plasticity, a novel approach for color image preprocessing and recognition, is very promising for the advancement of neuromorphic systems.
研究领域:
神经形态工程
·
光电子学
·
材料科学
·
人工智能硬件
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Liang Huang,Ziyu Shi,Daquan Li,Chenxing Jiang,Xuexue Wang,Mei Huang,Jing Wang,Bin Su
Considering that hue-recognition has drawn increasing research interests for visual detection because of its high accuracy and flexible analysis modalities, the exploration of a rational hue-recognition sensing system is highly demanded. Here, we report a hue-recognition-based lateral flow immunoassay (HLFIA) by ratiometric modulation of emission from two nanoprobes, in which red-emitting ruthenium(II)-doped dendritic silica colloids and green-emitting gold nanoclusters function as reporter and reference, respectively. The HLFIA strip can generate a visually discernible green-to-orange-red color gradient alternation, enabling the naked-eye semiquantitative inspection of successive C-reactive protein (CRP) concentration and concentration intervals (0–50, 50–150, and 150–500 ng mL–1) with a visual detection limit of 10 ng mL–1. By integrating with a customized smartphone-based portable imaging device and RGB color space recognition, the precise quantification of CRP can be achieved with a linear range of 0–100 ng mL–1 and a limit of detection of 0.64 ng mL–1. The HLFIA strip is robust and validated for CRP detection in real serum, holding great promise for noninstrumental and deprofessionalized point-of-care immunoassay of biomarkers.
研究领域:
生物化学
·
纳米技术
·
医学诊断
·
即时检测
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Rui Li,Haoyu Feng,Shancan Wang,Di Zhuang,Youhong Wen,Jie Zhu
A double-layer film was developed with tannic acid (TA) co-pigmented purple potato anthocyanin extract (PAE)-agar as the inner layer, and K-carrageenan-oregano essential oil Pickering emulsion (OPE)/silver nanoparticles (TA-AgNPs) as the outer layer. Molecular docking and FT-IR results elucidated that intermolecular hydrogen bond was the main interaction between components in the agar-carrageenan matrix, with TA and PAE contributing to intensified anthocyanin color through π-π stacking. The incorporation of OPE/TA-AgNPs enhanced the film's hydrophobicity (WCA > 100 ° ) and UV–vis barrier (close to 0% at 200-320 nm, effectively impeding UVA, UVB, and UVC) properties and exhibited outstanding antioxidant (DPPH scavenging rate > 88%) and antimicrobial activities. This film showed a significant color change in the pH range of 2–12 (from pink to yellow) and a considerable sensitivity to volatile amines within 2 min. The films effectively alleviated beef spoilage (extending the shelf life of beef for 1d) and reflected the freshness of beef during storage. Additionally, the digital color information of the film was obtained by a smartphone combined with RGB values analysis to quantify the freshness of beef rapidly. Therefore, this study expands the application of food packaging films with freshness preservation and monitoring in the field of animal-derived food.
研究领域:
食品科学
·
材料科学
·
生物技术
·
包装工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Bioscience
·
2024
·
IF 4.8
Qian Zhao,Xinhui Xie,Liye Chen,Jiahao Wu,Ziping Jiang,Xingbo Shi
Aflatoxin B1 (AFB1), one of the most toxic mycotoxins, is commonly found in various food. This study develops a dual-mode biosensor integrating smartphone analysis and dark-field microscopy (DFM) observation for AFB1 detection based on the disintegration of core-shell Ag@Au nanoparticles (Ag@Au NPs). Employing a sandwich assay format, AFB1 aptamer assembled Ag@Au NPs are anchored on 96-well plate and disintegrated by nitric acid. Thereafter, the Ag core is etched, releasing Ag + that serve as colorimetric signal regulators upon the introduction of the glutathione-manganese dioxide nanosheets-3,3′,5,5′-tetramethylbenzidine substrate. The color signal is analyzed using a smartphone based on red-green-blue value analysis. Furthermore, the collapsed Au shell releases individual Au NPs that serve as dark-field scattering nanoprobes, producing a high-intensity green dark-field scattering signal under DFM observation. The detection limit (3.67 fg/mL) is 199/8174/2180-fold lower than those of colorimetric signal, commercial enzyme-linked immunosorbent assay kit, and high-performance liquid chromatography, respectively. Overall, smartphone analysis enables on-site preliminary screening without sophisticated instrumentation. DFM observation allows the ultra-sensitive quantitative detection in a laboratory. The proposed dual-mode biosensor will not only reduce false-positive/negative rate through the bidirectional signal readout, but also offer a practical, stable, and ultrasensitive strategy for AFB1 detection in food.
研究领域:
食品科学
·
分析化学
·
纳米技术
·
生物技术
·
显微镜技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Po Hu,Shuai Zhou,Yang Wang,Jianhua Xu,Sa Zhang,Jiajun Fu
The luminescent self-healing materials have a significant prospect in optical device applications such as biosensing, multicolor displays, and high-level anti-counterfeiting. Herein, a novel printable, room-temperature self-healing and full-color-tunable luminescent composites were developed through the noncovalent binding of physically cross-linked p(HFBM- co -SBMA)/EMITFSI and excitation-orthogonalized RGB-switchable UCNPs. According to a strategy of Selective photon capture (SPC), the RGB-switchable core-sextuple-shell UCNPs were first established for red/green/blue-switchable luminescence under three different excitations (980/808/1550 nm) and even full-color output through the combination of 980/808/1550 nm light. The copolymer p(HFBM- co -SBMA), pre-synthesized via free radical polymerization, was incorporated with ionic liquid EMITFSI to formulate room-temperature self-healing material owing to ion–dipole interactions between EMITFSI and p(HFBM- co -SBMA). Afterward, the integration of 30 wt% EMITFSI copolymer and fluothane-modified UCNPs resulted in the formation of the final full-color-tunable luminescent self-healing composites, which not only exhibited superior Young’s modulus and healing efficiency than some previously reported room-temperature self-healing materials, but also realized full-color-tunable emissions under ternary 980/808/1550 nm excitations. Significantly, the luminescent self-healing composites, which also exhibited colorless character and high transmittance, could be employed as printable inks for making various luminescent patterns (including clock, flower, and QR code) on flexible substrates via convenient and cost-effective screen-printing technique. As the results of proofs of concept, these luminescent patterns displayed fantastic viewing capability and highly secured property, which showed enormous potential of the proposed luminescent self-healing composites in flexible panchromatic display and high-security-level anti-counterfeiting. To our knowledge, this work provides the strategy for constructing full-color-tunable self-healing luminescent composites for the first time. Undoubtedly, the well-designed luminescent self-healing materials will provide new insights and guidance for exploiting the new generation of flexible optical devices, especially multicolor displays and anti-counterfeiting devices.
研究领域:
材料科学
·
光学
·
纳米技术
·
显示技术
·
防伪技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）