ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Junhan Li,Chao Zhou,Shujia Wang,Jingwen Xu,Zhida Gao,Yong Zhang,Yan-Yan Song
Metal–organic frameworks (MOFs) offer unique chemical selectivity for surface-enhanced Raman scattering (SERS), yet their intrinsically weak light–matter coupling fundamentally limits sensitivity and has long hindered their practical deployment as plasmon-free SERS substrates. Here, we report a photonic-crystal strategy that fundamentally amplifies charge-transfer (CT)-mediated SERS in MOFs by exploiting slow photons at the photonic stop-band edge. Using UiO-66(Zr) nanocrystals as the model MOF, the assembled ordered MOF photonic crystals (PhCs) with tunable Bragg reflection are precisely aligned to the excitation wavelength. The resulting slow-light effect dramatically increases photon residence time and local electromagnetic field within the MOF pore domains. This slow-photon confinement synergistically couples with CT processes between MOFs and analyte molecules, resulting in a tenfold enhancement in SERS intensity compared with disordered MOF assemblies and an enhancement factor up to 5.15 × 10 8 without any plasmonic components. By leveraging the intrinsic band-structure tunability of MOFs, selective CT-SERS is further demonstrated across different molecular systems and environments. The optimized MOF-PhCs substrate enables ppb-level detection and multicomponent discrimination of lung-cancer-associated volatile organic compounds, which are digitally encoded into machine-readable Raman barcodes. This work establishes slow-photon-regulated MOF photonic crystals as a versatile platform for plasmon-free, chemically programmable, and functionally integrated SERS sensing.
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2026
·
IF 9.7
Xiaoyu Zhang,Zhi Yang,Mingyue Li,Min Li,Chengju Guo,Muhammad Saleem,Muhammad Zahid,Jianbao Liu,Shuai Qiu,Mei Liu
The application of surface-enhanced Raman spectroscopy (SERS) into gas sensing, particularly for breath-based diagnostics, is hindered by the challenge of simultaneously achieving high sensitivity, selectivity, and stability. This work introduces a synergistic enhancementarchitecture based on porous molybdenum oxide (MoO x ) nanobowl arrays to overcome this trilemma. This architecture is designed to couple electromagnetic field enhancement, efficient gas adsorption/concentration, and specific molecular recognition within a single unit cell. Finite element simulations confirm that the concave geometry creates densely packed electromagnetic hotspots, while the mesoporous structure induces gas vortices that prolong analyte residence time precisely within these enhancement zones. Functionalized with 4-aminothiophenol (4-ATP), the substrate achieves a detection limit of 0.95 ppb for 4-ethylbenzaldehyde (EBA), maintains high selectivity in complex simulated breath matrices, and exhibits remarkable long-term stability. This study proposes a potential design principle for next-generation, non-metal SERS platforms, supporting their potential in non-invasive early disease diagnosis.
✓ 已验证
产品关联
DOI
高影响因子
ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA
·
2014
·Vol. 152
·期 3
·248-257
·
IF 1.711
Pan Wang,Na Zhang,Li-Lin Zhou,Sheng-Yun Si,Chao-Liang Lei,Hui Ai,Xiao-Ping Wang
In many herbivorous insects, the attraction to suitable host plants is in part mediated by similar olfactory cues from different host plants. This study investigated the electrophysiological and behavioral responses of female Maruca vitrata Fabricius (Lepidoptera: Crambidae) to floral volatiles from two host plants, Vigna unguiculata (L.) Walpers and Lablab purpureus (L.) Sweet (both Fabaceae). Qualitative and quantitative differences were found between the odor profiles of two host plants by gas chromatography-mass spectrometry (GC-MS). Nine electroantennography-active compounds were detected in the headspace collections of the two host plants by means of coupled GC-electroantennographic detection. In a wind tunnel, female behaviors (upwind flight and source approach) were not affected by stimuli or their interaction with host plants, but the behaviors were influenced by host plants. A mixture of the nine bioactive compounds, including limonene, 1,3-diethylbenzene, benzaldehyde, acetophenone, 4-ethylbenzaldehyde, 1-(4-ethylphenyl)-ethanone, 2-methyl-3-phenylpropanal, 1H-indol-4-ol, and 1,1′-(1,4-phenylene)bis-ethanone mimicking L. purpureus (in a ratio of 0.4:9.7:2.4:5.7:78.1:4.8:100:0.6:30.3) attracted significantly more females approaching the sources compared with the mixture of compounds mimicking V. unguiculata (in a ratio of 0.3:1.4:1.6:3.7:50.8:3.2:100:4.2:16.7). Further bioassays revealed that a subtractive 4-component blend [limonene, 1,3-diethylbenzene, 4-ethylbenzaldehyde, and 1-(4-ethylphenyl)-ethanone in a ratio of 0.4:9.7:78.1:4.8] was essential for maximal attraction. Our study suggested that female M. vitrata might use similar odors from V. unguiculata and L. purpureus to locate suitable hosts and that an artificial lure, containing the major floral volatiles released by the two host plants, might be useful in exploring efficiency monitoring and/or control strategies of this moth in the field.
✓ 已验证
产品关联
DOI
高影响因子
Heliyon
·
2024
·
IF 3.4
Yimeng Ren,Longzhu Zhou,Yujie Shi,Yanan Yu,Weihai Xing,Qingyu Zhao,Junmin Zhang,Yueyu Bai,Jing Li,Chaohua Tang
Beef flavor profiles are strongly influenced by cooking methods and lipid composition. However, the effect of instant-boiling on the aroma of different beef slices was unclear. This study investigated the lipid profiles and instant-boiling volatile profiles of chuck tender (M. Supraspinatus ), sirloin (M. Longissimus dorsi ) and silverside (M. Biceps femoris ). Quantitative lipidomics identified 336 lipid molecular species, of which 84–112 were quantitatively different among the three beef slices. Sirloin had lower phosphatidylcholine, phosphatidylinositol, phosphatidylglycerol and free fatty acids than chuck tender and silverside. The unsaturated fatty acid acyl chains in phosphatidylethanolamine differed significantly. Solid phase microextraction-gas chromatography-olfactometry-mass spectrometry (SPME-GC-O-MS) identified hexanal, octanal, nonanal, decanal, (E)-2-octenal, (E)-2-nonenal, (E)-2-undecenal, (E,E)-2,4-nonadienal, (E,E)-2,4-decadienal, 1-octen-3-ol, 2-pentylfuran and acetoin as the aroma-active compounds of instant-boiled beef. Unsaturated free fatty acids and phosphatidylglycerols with unsaturated fatty acid residues positively correlated with the aroma-active compounds and might be crucial in flavor differences among the three beef slices. These findings provide greater understanding of the lipid and instant-boiling aroma-active compound profiles in chuck tender, sirloin and silverside, and reflect the suitability of different beef slices for instant-boiling from the aroma perspective.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Insects
·
2024
·Vol. 15
·期 11
·866
·
IF 2.7
Chen Wang,Dianxuan Wang,Fangfang Zeng,Liang Chen,Xinxin Zhao,Xi Zhu,Junji Yao,Yihan Li
Simple SummaryThe Indian meal moth,Plodia interpunctella(Hübner, 1813) (Lepidoptera: Pyralidae), exhibited significant differences in oviposition preference between normal-oleic peanuts (NOPs) and high-oleic peanuts (HOPs). In this study, we found key volatile organic compounds (VOCs) from NOP and HOP peanuts that were attractive or repellent toP. interpunctellafemales by gas chromatography/mass spectrometry (GC-MS), gas chromatography/electroantennographic detection (GC-EAD), and electroantennogram (EAG) analysis, as well as behavioral responses in Y-tube olfactometer and wind tunnel bioassays. The identification of key VOCs may provide a foundation for developing food-based attractants and repellents for pest control.The Indian meal moth,Plodia interpunctella(Hübner, 1813) (Lepidoptera: Pyralidae), a primary stored peanut insect pest, exhibited a significant difference in oviposition preference among normal-oleic peanuts (NOPs) and high-oleic peanuts (HOPs). Identifying key volatile organic compounds (VOCs) that are attractive or repellent toP. interpunctellais of great significance for the ecological management of pests. The profiles and contents of VOCs among NOP and HOP varieties were measured and compared, and key bioactive VOCs were further confirmed via an electroantennogram (EAG) analysis, as well as behavioral responses in Y-tube olfactometer and wind tunnel bioassays. Females prefer to lay eggs on NOP varieties more than on HOP ones. Acetophenone, nonanal, decanal, dodecane, 2,5-dimethylbenzaldehyde, and 4-ethyl-benzaldehy derived from tested peanuts elicited stronger antennal EAG responses. The results of the Y-tube olfactometer and wind tunnel bioassay showed that the relative high levels of nonanal, dodecane, and unique VOC acetophenone in NOP varieties have a significant attraction toP. interpunctella. Conversely, 4-ethyl-benzaldehyde and the unique VOC 2,5-dimethyl-benzaldehyde commonly found in HOP varieties exhibit notable repellent effects onP. interpunctella. These VOCs could contribute to the development of attractants or repellents derived from special peanut varieties for pest management.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zixuan Wang,Wei Ran,Juan Shen,Yuanyuan Cao,Zhongzhong Wang,Simeng Zhang,Rongzhang Hao
The detection of volatile organic compounds (VOCs) markers in exhaled breath based on surface-enhanced Raman scattering (SERS) technology is expected to become a non-invasive diagnosis method for lung cancer patients. However, the inherently low Raman scattering efficiency of trace VOCs in exhaled breath, coupled with the inadequate stability and uniformity of conventional Raman substrates, has hampered the practical application of SERS technologies for lung cancer biomarker detection. Additionally, the development of nanomaterials that simultaneously exhibit superior electromagnetic enhancement capabilities and efficient molecular enrichment functions remains a significant challenge. Herein, we have reported a size-effect-driven strategy for constructing Au nanocube (Au NC) @ zeolite imidazolate framework-8 (ZIF-8) core-shell nanoparticles. Tunability of Au NC@ZIF-8 shell thickness from 3 nm to 40 nm was achieved through cetyltrimethylammonium bromide (CTAB) concentration gradient control (0.5–2 mL) and ice bath kinetics control. This method requires no harsh conditions, featuring simple operation, mild reaction, and short synthesis time, successfully fabricating thin ZIF-8 shell layers with controllable structural properties. This unique architecture integrates the strong localized surface plasmon resonance (LSPR) effect of Au NCs with the porous adsorption capability of ZIF-8, realizing ultrasensitive detection of benzaldehyde (BA) with a limit of detection (LOD) of 2.5 ppb. As a straightforward approach for synthesizing homogeneous and controllable core-shell SERS-active nanoparticles, this method not only offers valuable insights for the preparation of analogous core-shell materials but also provides a robust material foundation and technical support for the non-invasive screening of lung cancer.
✓ 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）