SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yuyu Peng,Xinyin Zhang,Chunyan Wang,Xin Peng,Jia Huo,Kelei Pang,Xiwang Li,Xiaofeng Zhou
Rapid and sensitive detection of cortisol, which is essential for diagnosing adrenal and stress-related disorders, has been achieved through the development of a surface-enhanced Raman scattering (SERS) sensor. This sensor integrates molecularly imprinted polymers (MIPs) with silver core-gold shell nanoparticles (Ag@AuNPs) to provide a selective and sensitive means of cortisol detection. By leveraging the surface plasmon resonance (SPR) effect, the sensor is able to amplify SERS signals, while the MIPs offer specific recognition sites for cortisol. Fabricated using a straightforward two-step process that involves chronoamperometry and self-polymerization, the Ag@AuNPs functionalized with MIP (Ag@Au/MIP) sensor is both easy to prepare and highly reproducible. The Ag@AuNPs increases the effective surface area, optimizing the electromagnetic field and significantly boosting the sensor's sensitivity. The sensor demonstrates a strong affinity for cortisol, exhibiting a linear detection range from 100 pM to 0.1 mM and a detection limit as low as 10 pM. Furthermore, it shows excellent specificity against potential interferences and maintains its stability and anti-interference ability in artificial saliva. By providing a rapid, cost-effective, and user-friendly platform for cortisol detection, this Ag@Au/MIP-based SERS sensor holds great promise for clinical diagnosis, health monitoring, and point-of-care testing applications.
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DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 30
·期 6
·065502
·
IF 3.404
Feng Zhang,Xiaojie Wang,Hui Tang,Xu Jie,Xuemei Jiang,Weili Wei
Fatty acids (FAs) are important dietary sources of fuel for animals and structural components for cells. The number, position and configuration of olefins in the alkyl chains play important roles in the impacts of FAs on human health. Currently, structural profiling of FAs in edible oils and fats is an important issue in nutrition industries and food safety. Due to the lack of distinct functional groups, it is extremely difficult to discriminate FAs with structural differences by facile and in situ sensing methods. A few chemosensors have been developed for shape selective sensing of FAs, but their capability and performance were still limited. Herein, for the first time, we proposed a multichannel Au nanosensor for visual and pattern-generating inspection of FAs based on the highly selective binding ability of Ag+ to olefinic bonds and Ag+ regulable color variation of Au nanoparticles. As a result, the nanosensor showed good selectivity for five FAs with subtle structural difference as low as 5 nM. By further deriving three channel signals in respect of color and color depth, a signature-like signal pattern could be generated by principal component analysis for each FA and even different FA mixtures such as edible oils. Hence, structural variation of FAs in edible hot pot oils with heat treatment was successfully monitored by this Au nanosensor over time. This sensor holds great promise in point-of-care inspection of edible oils and fats.
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高影响因子
Nanoscale
·
2019
·Vol. 12
·期 3
·1811-1816
·
IF 6.97
Yongqin Liu,Liang Huang,Xinyang Zhu,Youxing Fang,Shaojun Dong
The electrochemical nitrogen reduction reaction (NRR) under ambient conditions is currently attracting intense attention, but it still remains a great challenge to develop highly selective and active NRR electrocatalysts. Inspired by the intrinsic NRR activity of Au, we systematically studied the synergistic enhanced effect of incorporating other transition metals into Au on its NRR activity. A general strategy was used to synthesize a series of Au-based bimetallic nanocatalysts (AuCu, AuAg, AuPd and AuRu), and the NRR catalytic performance of the as-obtained electrocatalysts was investigated in detail. The experimental results indicate that the positive effect of Cu on NRR was the most remarkable in comparison with that of Ag, Ru and Pd, which can be ascribed to the synergy of the Au and Cu components via modulating the electronic structure and further changing the binding affinity of adsorbed N atoms on the catalyst. Finally, the optimized nanocatalyst with the atom ratio of Au1Cu1 achieved the highest faradaic efficiency (54.96%) and ammonia yield rate (154.91 μg h−1 mgcat−1) at −0.2 V vs. RHE, exceeding those of the previously reported Au nanocatalysts.
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DOI
高影响因子
Materials Today Energy
·
2021
·
IF 7.311
Songliang Liu,Shuli Yin,Shiqian Jiao,Hugang Zhang,Ziqiang Wang,You Xu,Xiaonian Li,Liang Wang,Hongjing Wang
Electrochemical N 2 reduction reaction (NRR) under ambient conditions provides sustainable and green pathways; meanwhile, efficient electrocatalysts are strongly required. In this work, we report an interfacial active site strategy to improve the electrocatalytic NRR performance by modification of Au nanowire (Au NW) surface with oxygen-rich tannic acid (TA). Benefiting from their ultrafine one-dimensional nanowire architecture and the TA-modified metallic interface, the TA-Au NWs effectively facilitate the adsorption and activation of reactants. The TA-Au NWs exhibit a large NH 3 yield rate (15.71 μg h −1 mg −1 cat. ) and a high Faraday efficiency of 14.83% at −0.3 V (vs. the reversible hydrogen electrode) in a N 2 -saturated 0.1 M Na 2 SO 4 with an excellent electrochemical durability. This work provides a general surface modification strategy to fabricate highly active NRR electrocatalysts.
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高影响因子
Materials Research Express
·
2017
·Vol. 4
·期 5
·055502
·
IF 1.068
Shaofeng Zhang,Jinggang Hao,Feng Ren,Wei Wu,Xiangheng Xiao
Combination of semiconductors with plasmonic nanostructures is an effective route to promote the solar light harvesting as well as the efficiency of photocatalysis. In the present work, the Au@SnO2 hybrid nanostructures with Au nanorods as the cores and highly crystallized SnO2 nanoparticles as the shells were fabricated by a facile hydrothermal method. A critical factor, which influences the coating state of the SnO2 shells over Au NRs, was found to be the concentration of CTAB agent in the system and the corresponding mechanism was also proposed. The photocatalytic activities of the Au@SnO2 nanohybrids were examined by degradation of rhodamine B (RhB) dyes at room temperature. The Au@SnO2 nanohybrids exhibited much higher catalytic activities than that of the commercial SnO2 NPs, which could be attributed to the localized electric field enhancement effect of Au nanorods plasmon and charges transfer between the Au nanorods and SnO2.
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2017
·
IF 4.857
Molin Zhou,Xin Jiang,Xingxing Jiang,Ke Xiao,Yangwu Guo,Hongwei Huang,Zheshuai Lin,Jiyong Yao,Chen-Ho Tung,Li-Zhu Wu,Yicheng Wu
A new Au-based sulfide BaAu2S2 was obtained through solid-state reaction. It crystallizes in the tetragonal space group I41/amd with unit cell parameters of a = 6.389 72(2) Å, b = 6.389 72(2) Å, c = 12.7872(1) Å, and Z = 4. Its structure features [AuS2/2]∞ zigzag chains composed of corner-sharing AuS2 linear units. With a direct band gap of 2.49 eV, BaAu2S2 is suitable for the visible-light harvesting. Moreover, it exhibits excellent visible-light photocatalytic activity, which is 1.3 times that of graphitic carbon nitride (g-C3N4) and also demonstrates excellent circulating stability. On the basis of the crystal and electronic structure analysis, the electrons are highly delocalized along the [AuS2/2] chains, and the electron effective mass of BaAu2S2 is only approximately one-fifth of that of g-C3N4, which may help the separation of the electron/hole pairs during the photocatalytic process. Additionally, the absorption coefficient of BaAu2S2 is extremely high, exceeding 1 × 104 cm–1 over the entire absorbable visible spectrum (hν > Eg), which is significantly higher than that of g-C3N4. Such factors may contribute to its outstanding photocatalytic performances. According to our best knowledge, BaAu2S2 is the first noble metal-based chalcogenide photocatalyst reported as intrinsic light-harvesting and electron/hole-generating centers. This study may provide valuable insights for further research on photocatalytic materials.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Haixing Gao,Yang Cao,Yong Chen,Xiaoyong Lai,Shujiang Ding,Jinchun Tu,Junlei Qi
The performance of direct methanol fuel cells hinges on the activity of the catalyst. To enhance the electro-catalytic activity, a flower-like nanostructure assembled from thin Au/NiCo 2 O 4 nanosheet is synthesized via a microwave process combined with deposition-reduction method, where the Au nanoparticles are well dispersed on the surface of the NiCo 2 O 4 nanosheet . The Au/NiCo 2 O 4 composite nanoflower is successfully applied in the electro-catalytic oxidation of methanol and its electro-catalytic performance is investigated by cyclic voltammetry , chronoamperometry and electrochemical impedance spectroscopy , which exhibits excellent electro-catalytic qualities towards methanol electro-oxidation in alkaline medium, including low onset potential (0.31 V), high current densities (135.9 mA cm −2 ) at 0.60 V (vs. SCE), and desirable electro-oxidation stability (94%) after 500 cycles. The activity of NiCo 2 O 4 is significantly enhanced by a small amount of Au for methanol electro-oxidation. Au, a highly electronegative metal, acted as an electron adsorbate, stimulates the generation and stabilization of Co 4+ and Ni 3+ cations as the active centers for methanol oxidation reactions.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Mingjie Yang,Shendan Zhang,Fengdong Qu,Shu Gong,Chenhao Wang,Lei Qiu,Minghui Yang,Wenlong Cheng
Modification with Au nanoparticles on the surface of semiconductor metal oxide (SMO) is a simple and effective mean to improve the sensing performance of pristine SMO sensor. ZnO nanorods are prepared via a simple precipitation reaction and subsequently modified by catalytic Au nanoparticles with effect on the surface through an ammonia deposition method. The gas response of sensor based on ZnO nanorods modified by Au nanoparticles is improved by 6.6 times to 100 ppm acetone at the optimal operating temperature of 172 °C, which is reduced from 219 °C for pristine ZnO sensor. Meanwhile, the response/recovery time is shortened to 1 s/20 s from 13 s/29 s. In addition, the sensing enhancement mechanism can be attributed to the electronic and chemical sensitization effects of Au nanoparticles.
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高影响因子
CHEMPHYSCHEM
·
2012
·Vol. 13
·期 18
·4142-4147
·
IF 3.412
Xinmei Zhao,Narayan S. Hosmane,Aiguo Wu
Graphical Link up: ortho -Phenylenediamine (PDA) acts as a linker in the deposition of gold nanoparticles on the surfaces of Fe 3 O 4 microspheres. After coating with PDA, the morphology of the microspheres changes significantly to nanoparticle clusters, and this is ideal for the deposition of the gold nanoparticles. The resulting Fe 3 O 4 /Au nanocomposites exhibit enhanced magnetism so that they can be recovered and recycled easily. 1,2-Diaminobenzene, popularly known as ortho -phenylenediamine (PDA), is found to be a prototype spacer for the deposition of gold nanoparticles on the surfaces of Fe 3 O 4 microspheres. Upon carbonization with PDA, the morphology of the product changes significantly, and the resulting nanocomposites exhibit enhanced magnetism beyond the saturation value of Fe 3 O 4 . The Fe 3 O 4 /Au nanocomposites show good surface-enhanced Raman spectroscopy activity with a detection limit of 10 −15 M .
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Jiandong Hao,Ling Li,Tingwei Yan,Jinchang Meng,Zhenxing Liu
Boron nitride (BN) is suitable for ultraviolet (UV) photodetection with its wide bandgap and high absorption coefficient. The research on fabrication process and performance optimization is urgent with the development of UV detection technology. In this work, the band structure, work function, charge distribution and transfer, and optical absorption coefficients of BN/Au and BN/Al interfaces are calculated based on the density functional theory. The results show that the BN monolayer gets more charges with the influence of Au. The charge transfer is 0.025e and 0.015e for BN/Au and BN/Al. The absorption coefficients of BN/Au is higher than that of BN/Al in the DUV region, which enhances the light absorption of BN. In addition, BN/Au and BN/Al DUV detector is fabricated by dry transfer method. The highest photo-dark current ratio (PDCR) of 115.04 and 29.09 are obtained for BN/Au and BN/Al at an optical power density of 1.21 mW/cm 2 ( V bias =10 V). The responsivity (R) and detectivity (D*) is up to 0.70μA/W and 1.55 × 10 8 Jones for the BN/Au. The rise and fall times (T r /T f ) are 0.12 s and 0.11 s, respectively. The DUV detector is fabricated with easy process, low cost and fast response. This provides theoretical support and technical reference for the next generation of high-performance devices.
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高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Jia-Yi Zhang,Si-Ting Liu,Zhen-Long Dou,Cong-Cong Zhang,Guo-Wei Li,Si-Jing Ding,Li Zhou,Qu-Quan Wang
Hybridization is an effective strategy to obtain complementary and synergistic properties from each component. This study describes an intriguing approach for the synthesis of rod-shaped Cu2S/AgPtSe2–Au hybrids with improved photothermal capabilities. The synthesis protocol involves a silver-mediated method for depositing the topological semimetals of PtSe2 onto the surface of Au nanorods, followed by wrapping a layer of Cu2S with high carrier concentration and mobility. The formed heterojunctions exhibit enhanced light absorption properties and accelerated charge separation of photoexcited carriers. Under excitation of a near-infrared 1064 nm laser, the hybridized Cu2S/AgPtSe2–Au shows enhanced photothermal conversion, with a 2.5-time temperature increase (ΔT) than that of bare Au nanorods.
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2019
·Vol. 35
·期 5
·924-928
·
IF 1.071
Xiang Siyuan,Meng Qingnan,Zhang Kai,Gu Yue,Liu Wendong,Yang Bai
Using dextran as both reductant and stabilizing agent, nanopetals(ZnO-Au NPs) were easily synthesized and possessed a petal-like morphology. The feature structure and size of such ZnO-Au NPs were adjustable by regulating the amount of chloroauric acid(HAuCl 4 ). Moreover, the electrochemical property of the obtained NPs was evaluated by being immobilized on the glassy carbon electrode(GCE), which performed both high sensitivity and stability in dopamine(DA) determinations. Furthermore, the as-prepared ZnO-Au NPs could also detect DA and uric acid(UA) simultaneously in the mixture without interference, indicating good selectivity and showing promising potential in biosensing.
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高影响因子
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