CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jie Ren,Hongbo Xia,Yue Wu,Yaqun Han,Shufen Zhang,Suli Wu
Mie resonant structural colors have recently emerged as a promising approach for large-scale and high-precision material appearance design to replace plasmonic structures. However, Mie resonant structural colors are still limited in the gamut of red because high-order multipoles such as electric and magnetic quadrupoles (EQ, MQ) usually exist in blue band when the electric dipole (ED) and magnetic dipole (MD) located in red band. Here we achieved pure red Mie resonant structural color based on ZnO spheres. Both simulation and experimental results proved that the dipole resonance and quadrupole resonance can be separated effectively by decreasing the refractive index of the resonator. By comparing different materials, ZnO is the most suitable material to generate a pure red color. Further, by controlling the distance of ZnO spheres on the substrate, high-order multipole resonance was inhibited completely and pure red Mie resonant structural color was achieved. In addition, by tuning the size of ZnO spheres, bright purple, blue, green, yellow, orange, and red colors were also realized. Finally, complex patterns can be easily made by the spraying method. This work opens new perspectives on full-color Mie resonant structural colors.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2022
·Vol. 87
·期 9
·3953-3964
·
IF 3.693
Yuan Li,Cijian Li,Meiyu Chen,Zunying Liu,Mingyong Zeng,Yaqin Hu
Sous-vide cooking is a highly praised method used to cook muscle foods because of its desired effect of providing better sensory properties by maintaining texture. In this study, we further explored the effect of water on texture by revealing the mechanisms of moisture migration. Low field nuclear magnetic resonance (LF-NMR) showed that the nonflowing water in sous-vide cooking hairtail was 2.36 ± 0.33% higher than that in traditional cooking. Magnetic resonance imaging (MRI) was used to clarify the law of moisture migration induced by temperature, and the moisture migration of the sous-vide cooking hairtail was slower during the holding heating stage. The microstructure explained the change rules of the texture. The degree of change was consistent with the moisture migration level. Digitalizing analysis quantitatively verified the effect of sous-vide cooking on the hairtail microstructure. The low moisture migration rate of sous-vide cooking resulted in a less damaged microstructure of the hairtail, manifesting as a desirable texture. Practical Application LF-NMR and MRI showed that sous-vide hairtails exhibited a lower moisture migration rate. The holding heating stage only slightly changed the microstructure of the hairtail. The digitalizing analysis confirmed the moisture migration mechanisms. Heat-induced protein denaturation was closely related to the water state.
研究领域:
食品科学
·
生物物理学
✓ 已验证
DOI
高影响因子
TALANTA
·
2017
·
IF 4.162
Ting Li,Yong Liao,Xiaoyan Jiang,Di Mu,Xiandeng Hou,Chunchun Zhang,Pengchi Deng
The chemical shifts of several important endogenous phosphorus compounds under different pH conditions were explored, including adenosine-5′-triphosphate, adenosine-5′-diphosphate, adenosine-5′-monophosphate, phosphorylcholine and phosphorylethanolamine. Their 31 P NMR and 1 H NMR chemical shifts were all pH-sensitive in the similar pH range. Two dimensional (2D) 1 H– 31 P NMR spectra were found helpful to identify these endogenous phosphorus markers in biological samples from rather complicated NMR spectra. Herein, for the first time, a pH sensor based on 2D 1 H– 31 P NMR was established and applied to biological samples analysis with pH values determined in good agreement with those by potentiometric method . Apart from being simple, green, rapid and less sample-consuming, information concerning both the endogenous phosphorus markers and pH status could be attained in a single NMR run, which demonstrated the great potential of this method in rare sample analysis and even disease diagnosis.
研究领域:
生物化学
·
医学诊断
✓ 已验证
DOI
PubMed
高影响因子
VIBRATIONAL SPECTROSCOPY
·
2020
·
IF 1.917
Zhe Wang,Qi Wang,Chunxia Liu,Fangyu He,Zhiguo Song,Qiubei Qiu,Jun Yan,Weiwei Zhu
Polyphenols are a kind of vital biologically active substances in fruits and vegetables. In this study, with the reductive ability in the alkaline solution, eight polyphenols[(-)-Epigallocatechin gallate (EGCG), (-)-Epigallocatechin (EGC), (-)-Epicatechin gallate (ECG), (-)-Epicatechin (EC), (-)-Gallocatechin gallate (GCG), (-)-Gallocatechin (GC), (+)-Catechin (C) and Gallic acid (GA)] could produce silver nanoparticles(AgNPs) with [Ag(NH 3 ) 2 ] + . It was found that the AgNPs had intense surface plasmon resonance bands at 415 nm and RRS spectra signals at 450 nm, which were linearly related to the concentration of polyphenols. It was used for the spectrophotometric and RRS spectra determination of the former eight polyphenols with low detection limits. The developed method was applied for the determination of polyphenols in tea and products.
研究领域:
分析化学
·
生物化学
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2017
·
IF 13.858
Fen Liu,Ningdong Feng,Qiang Wang,Jun Xu,Guodong Qi,Chao Wang,Feng Deng
The detailed structure–activity relationship of surface hydroxyl groups (Ti–OH) and adsorbed water (H2O) on the TiO2 surface should be the key to clarifying the photogenerated hole (h+) transfer mechanism for photocatalytic water splitting, which however is still not well understood. Herein, one- and two-dimensional 1H solid-state NMR techniques were employed to identify surface hydroxyl groups and adsorbed water molecules as well as their spatial proximity/interaction in TiO2 photocatalysts. It was found that although the two different types of Ti–OH (bridging hydroxyl (OHB) and terminal hydroxyl (OHT) groups were present on the TiO2 surface, only the former is in close spatial proximity to adsorbed H2O, forming hydrated OHB. In situ 1H and 13C NMR studies of the photocatalytic reaction on TiO2 with different Ti–OH groups and different H2O loadings illustrated that the enhanced activity was closely correlated to the amount of hydrated OHB groups. To gain insight into the role of hydrated OHB groups in the h+ transfer process, in situ ESR experiments were performed on TiO2 with variable H2O loading, which revealed that the hydrated OHB groups offer a channel for the transfer of photogenerated holes in the photocatalytic reaction, and the adsorbed H2O could have a synergistic effect with the neighboring OHB group to facilitate the formation and evolution of active paramagnetic intermediates. On the basis of experimental observations, the detailed photocatalytic mechanism of water splitting on the surface of TiO2 was proposed.
研究领域:
材料科学
·
催化化学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2018
·
IF 3.129
Shasha Cheng,Tan Zhang,Xiaohui Wang,Yukun Song,Huihui Wang,Haitao Wang,Peiqiang Yang,Mingqian Tan
Water and lipid changes play important roles for the quality formation of salted duck eggs . In the present study, low-field nuclear magnetic resonance (LF-NMR) and magnetic resonance imaging (MRI) were introduced to monitor water and lipid dynamics of duck egg during salting as nondestructive methods . Four proton pools with different mobilities in fresh duck egg matrix were identified by LF-NMR transverse relaxation, and salting significantly changed the proton mobility due to the gelation of egg yolk, release of lipid and watery of egg white . MRI showed high density of proton with lower mobility and higher mobility in egg yolk and white, respectively, and the brighter region of egg yolk in T 1 images continuously decreased from vitelline membrane to center. The variations in the relaxation parameters and MRI images have a close relationship with other quality characteristics of duck eggs induced by salt. Therefore, LF-NMR and MRI could provide information about water and lipid dynamics of duck eggs during salting, and have great potential for quality assurance in salted duck eggs as a fast and non-destructive method.
研究领域:
食品科学
·
生物物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF MAGNETIC RESONANCE
·
2021
·
IF 2.229
Fenfen Wang,Sanath K. Ramakrishna,Pingchuan Sun,Riqiang Fu
Direct polarization using a single pulse is the simplest excitation scheme in nuclear magnetic resonance (NMR) experiments, capable of quantifying various compositions in many materials applications. However, this single-pulse excitation generally gives rise to NMR spectra with a severely distorted baseline due to the background signals arising from probe components and/or due to the radio-frequency (RF) acoustic ringing, especially in low-γ nuclei and wide-line NMR. In this work, a triple-pulse excitation scheme is proposed to simultaneously suppress the background signals and eliminate the RF acoustic ringing. The acoustic ringing is cancelled through subtraction in any two consecutive scans by alternating the receiver phase while keeping the phase of the pulse right before acquisition the same. While the triple-pulse scheme generates an additional flip-angle dependent scaling to the traditional single-pulse excitation profile in such a way that the scaling is one when the flip-angle is ∼90° but becomes almost zero when the flip-angle is very small. Therefore, the background signals arising from the materials outside the sample coil experiencing a very small fraction of the RF flip-angles can be effectively suppressed. Various samples containing 1 H and quadrupolar nuclei ( 17 O, 25 Mg, and 23 Na) have been used to demonstrate the effectiveness of this newly proposed triple-pulse excitation in terms of suppressing the background signals and eliminating the acoustic ringing effects.
研究领域:
物理学
·
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Shiqi Hu,Weicheng Shi,Yu Chen,Jinming Yuan,Xin Xiong,Tingting Liu,Shilei Ding,Wei Xiao,Yaofei Chen,Gui-Shi Liu,Zhe Chen,Lei Chen,Yunhan Luo
Surface plasmon resonance (SPR), generally including propagating SPR (PSPR) and localized SPR (LSPR), has attracted wide attention due to the uniqueness of the strong evanescent field. The PSPR has the merit of high sensitivity over the LSPR, but lacks flexibility to tune resonant wavelength and serves limited application. Here we revisit the fundamental PSPR wavevector matching theory and construct a three-dimensional (3D) tuning hypersurface for the parameters of resonant wavelength, incident angle, and surrounding refractive index , which provides the performance tuning guide map. With assistance of the hypersurface, a hypersurface-tuning PSPR (HT-PSPR) sensor is designed with high sensitivity and ultra-wide detection range. Experiments demonstrate that the sensor can selectively tune the resonance and render the sensitivity to a theoretical upper limit of ∼10 5 nm/RIU, or an ultra-wide detection range of 0.518 RIU, which satisfies the requirement for most gas and liquid sensing applications. Using D -biotin as the detection sample of small molecule (MW=244 Da), the HT-PSPR sensor achieves an ultra-low detection limit down to 27.5 fM. The hypersurface-tuning has created an intrinsic, universal and flexible method for tuning PSPR at the desired resonant wavelength, sensitivity and detection range, which is expected to find great significance in SPR design and applications.
研究领域:
光学
·
传感器
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Xinxi Zeng,Bingcheng Luo,Han Zhang,Xiaoqing Xi,Bo Li,Ji Zhou
Electric field-induced antiferromagnets with ultrahigh resonant frequencies without current flow in insulating materials is highly desired. This paper reports the terahertz (THz) responses of Γ 4 in rare-earth orthoferrite GdFeO 3 ceramics, which were manipulated using thickening and thermal methods. As the thickness was increased, the noise was greatly reduced, and increased peak heights of both the ferromagnetic resonances and antiferromagnetic resonances were observed. For the thermal control of THz responses in GdFeO 3 , the resonant frequencies of both the ferromagnetic resonances and antiferromagnetic resonances experienced a blue shift , and their peak heights increased. The detected shifts of the responses were determined by the changes in thermodynamic potential . Moreover, macroscopic properties were collected to verify the coexistence of ferromagnetism and antiferromagnetism .
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Biao Zhao,Yingxian Xue,Yixiao Li,Min Li,Zuxing Zhang,Xuming Zhang,Aoqun Jian
Improving the sensitivity of surface plasmon resonance (SPR) sensors is a crucial field of research, as it enables the detection of lower concentrations of analytes and smaller biomolecular interactions. This study developed a novel Fano resonance (FR) sensor with exceptional sensitivity and figure of merit ( FOM ) by combining graphene oxide (GO) with a plasmonic silver film-polydimethylsiloxane (PDMS) hybrid nanostructure. The results demonstrated that the FR-GO sensor achieved an average refractive index (RI) sensitivity of 33.6 μm/RIU, representing a 20.53 % improvement over the FR sensor (27.9 μm/RIU). Additionally, the FOM increased by 36.25 %, reaching a maximum of 2383.82 RUI −1 , which was two orders of magnitude higher than traditional SPR sensors. To evaluate its practical application, the sensor was used to detect carcinoembryonic antigen (CEA), a tumor biomarker. The proposed sensor exhibited a measurement sensitivity of 5.2 nm/(ng/ml) and a limit of detection ( LOD ) of 63.5 pg/ml. Furthermore, the method demonstrated good selectivity, reproducibility, and stability. The enhanced sensitivity and FOM of this sensor design have the potential to advance early disease detection and biomolecular interaction studies.
研究领域:
生物传感
·
医学检测
·
纳米材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 23
·12944-12950
·
IF 2.936
Yang Su,Li-Na Hao,Kun Liu,Jun Zhang,Liang Dong,Yunjun Xu,Yang Lu,Hai-Sheng Qian
Upconversion core–shell nanoparticles have attracted a large amount of attention due to their multifunctionality and specific applications. In this work, based on a NaGdF4 sub-10 nm ultrasmall nanocore, a series of core–shell upconversion nanoparticles with uniform size doped with Yb3+, Er3+ and NaDyF4 shells with different thicknesses were synthesized by a facile sequential growth process. NaDyF4 coated upconversion luminescent nanoparticles showed an obvious fluorescence quenching under excitation at 980 nm as a result of energy resonance transfer between Yb3+, Er3+ and Dy3+. NaGdF4:Yb,Er@NaDyF4 core–shell nanoparticles with ultrathin layer shells exhibited a better T1-weighted MR contrast.
研究领域:
材料科学
·
医学影像
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYST
·
2022
·Vol. 147
·期 24
·5687-5693
·
IF 5.227
Yuyuan Zhang,Jing Lei,Wei Liu,Yan Jin,Baoxin Li
Various CRISPR/Cas12a-based biosensing systems have been developed in the past few years, and most of these systems used Taqman probes to report signals through fluorescence resonance energy transfer (FRET). In this study, we explored chemiluminescence resonance energy transfer (CRET) as the readout mode for CRISPR/Cas12a-based biosensing. The chemiluminescence (CL) reaction of bis(2,4,6-trichlorophenyl) oxalate (TCPO) and H2O2 was used to excite the fluorophore dye of the Taqman probe. Different from FRET, CRET does not need external excitation light, which can effectively avoid autofluorescence and photobleaching. The detection limit of this CRET readout mode was estimated to be 10 pM for target DNA, which was about 8 times lower than that of the widely used FRET readout mode. These results suggest that CRET can serve as a rapid, sensitive and simple readout mode of CRISPR/Cas12-based biosensing, and can further enrich the toolbox of CRISPR/Cas12-based biosensing.
研究领域:
分子生物学
·
生物化学
·
诊断学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）