ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Ke Zhang,Meiqi Wang,Tao Liu,Zhenyu Chu,Wanqin Jin
Sucrose is one of the most applied carbon sources in the fermentation process, and it directly determines the microbial metabolism with its concentration fluctuation. Meanwhile, sucrose also plays a key role of a protective agent in the production of biological vaccines, especially in the new mRNA vaccines for curing COVID-19. However, rapid and precise detection of sucrose is always desired but unrealized in industrial fermentation and synthetic biology research. In order to address the above issue, we proposed an ultrasensitive biosensor microchip achieving accurate sucrose recognition within only 12 s, relying on the construction of a Prussian blue analogue@Au edge-rich (PBA@AuER) microarchitecture. This special geometric structure was formed through exactly inducing the oriented PBA crystallization toward a certain plane to create more regular and continuous edge features. This composite was further transformed to a screen-printed ink to directly and large-scale fabricate an enzymatic biosensor microchip showing ultrahigh sensitivity, a wide detection range, and a low detection limit to the accurate sucrose recognition. As confirmed in a real alcohol fermentation reaction, the as-prepared microchip enabled us to accurately detect the sucrose and glucose concentrations with outstanding reusability (more than 300 times) during the whole process through proposing a novel analytical strategy for the binary mixture substrate system.
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Xiaorong Gan,Huimin Zhao,Xie Quan,Yaobin Zhang
An ultrasensitive electrochemical sensor for Cu 2+ detection was first developed based on p-aminothiophenol (PATP) anchored on the surface of Au nanoparticle-decorated hydrogen-incorporated TiS 2 nanosheets (PATP/Au-H x TiS 2 ). In the synthesis process, the plane edges of H x TiS 2 nanosheets offered Au nanoparticles with incubation sites for the heterogeneous nucleation and growth. On the other hand, Au nanoparticles were not only served as an excellent electrical catalyst to facilitate electron transfer and as a substrate for loading PATP molecules by Au-S valent bonds, but also could effectively avoid the aggregation of H x TiS 2 nanosheets . Due to the synergetic effects from Au-H x TiS 2 for signal amplification, the as-formed electrochemical sensor exhibited highly sensitive and selective assaying of Cu 2+ with a detection limit of 90 pM (3σ) and a linear range from 0.2 nM to 5 μM, under optimal conditions. Its specificity was ascribed to the strong coordination interaction between Cu 2+ and N atoms of imine moieties in PATP after electrochemical oxidation .
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DOI
高影响因子
JOURNAL OF RAMAN SPECTROSCOPY
·
2017
·Vol. 49
·期 2
·245-255
·
IF 2.969
Xiu Liang,Xiao-Juan Zhang,Ting-Ting You,Nan Yang,Guang-Sheng Wang,Peng-Gang Yin
MoS 2 , a novel inorganic graphene analogues with typical two-dimensional structure, has attracted increasing interest in various fields. MoS 2 -based hybrid plasmonic structures have been extensively investigated as higher quality surface enhanced Raman scattering (SERS) substrates. Herein, we have designed a three-dimensional (3D) MoS 2 nanospheres (NSs) based hybrid nanostructure as SERS sensor by decorating Au nanoparticles (NPs) on the surface of 3D MoS 2 -NSs (3D MoS 2 -NS@Au-NPs). 3D MoS 2 -NSs acts as (a) a stable scaffold for Au NPs decoration via microwave-irradiation hydrothermal process, (b) a chemical mechanism source for Raman enhancement, and (c) a 3D spatial structure for generation of more effective hot spots due to Au coupling effect and supply larger surface area for adsorbing probe molecules. The 3D MoS 2 -NS@Au-NPs hybrid structure exhibits 56-fold improvement on enhancement factor compared to two-dimensional MoS 2 -NST@Au-NPs hybrid structures. SERS performance was easily and effectively optimized with the tuning of the density and sizes of Au NPs. The optimized 3D MoS 2 -NS@Au-NPs was applied as SERS sensor for melamine detection in milk. Quantitative detection was realized in the range of 1 ppb–10 ppm with a linear coefficient of .997. Excellent sensitivity of 1 ppb and uniformity of 10.12% relative standard deviation was achieved, which could meet the demand for melamine detection as prescribed by the U.S. Food and Drug Administration.
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高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Mei Hong,Bingyu Wang,Xiaoling Xu,Peng Bin,Jingyu Zhang,Qiang Zhang
The catalytic membrane reactor (CMR) is recognized as one of the most effective strategies to treat the organic wastewater system. Yet so far, inefficiency, lack of bactericidal ability, and serious membrane fouling have limited its further application. In this study, we designed a novel polyacrylonitrile (PAN) catalytic separation membrane loaded with gold nanoparticles (Au NPs) via a facile photopolymerization method. The Au NPs on the catalytic separation membrane (PAN-Au) surface can serve as a high-performance catalyst, and the ligand of the 4-vinylpyridine (4VP) acts as an efficient protecting ligand for Au NPs to avoid leakage and agglomeration. The PAN-Au membrane was applied to CMR, which can one-step catalytic separation of nitrophenols and methylene blue efficiently in a flow-through mode (up to 97.5% over multiple cycles of reuse). Even after contamination with organic dyes, the PAN-Au membrane can still recover the catalytic separation performance by self-cleaning. Moreover, a remarkable antibacterial (with an efficiency of ≈100%) activity of the PAN-Au membrane, with a strong correlation with the small-sized and well-distributed Au NPs loaded on the membrane surface . The tremendous catalytical, self-cleaning, and antibacterial performance of the PAN-Au membrane provides new insights for the rational design of flow CMR for industrial applications.
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DOI
高影响因子
ChemCatChem
·
2020
·Vol. 13
·期 1
·438-444
·
IF 4.853
Xianwei Wang,Nobutaka Maeda,Daniel M. Meier,Alfons Baiker
Graphical Potassium titanate (K 2 Ti 8 O 17 ) nanobelts (KTN) are a unique support for Au and bimetallic AuRh nanoparticles showing strong enhancement of the catalytic reduction of NO with CO to N 2 .The KTN support facilitates the formation of surface nitrate, carbonate and isocyanide species, resulting in superior catalytic activity compared to corresponding TiO 2 -supported catalysts. The catalytic reduction of NO with CO was examined over monometallic Au and bimetallic AuRh nanoparticles supported on potassium titanate (K 2 Ti 8 O 17 ) nanobelts (KTN) and TiO 2 . The highly crystalline KTN, prepared from TiO 2 by a hydrothermal process using KOH, were several μm long and ca. 8 nm wide. Both Au and bimetallic AuRh catalysts showed a striking enhancement of the catalytic performance with KTN as support, compared to corresponding TiO 2 -supported catalysts. The reasons for this behavior could be traced back using in situ diffuse reflectance infrared Fourier transform spectroscopy in tandem with modulation excitation spectroscopy, which proved that the KTN support promotes the formation of surface nitrate (−NO 3 − ), carbonate (−CO 3 2− ), and isocyanide (−NCO) species. In particular, the combination of KTN with bimetallic AuRh nanoparticles results in the facile formation of isocyanide, which is a pivotal intermediate for producing dinitrogen molecules via the reaction with NO; NCO (a) +NO (a) →N 2 +CO 2 .
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2017
·
IF 4.233
Wenhao Dong,Yipeng Ren,Zhixue Bai,Jun Jiao,Yuan Chen,Bingkai Han,Qiang Chen
An innovative epinephrine sensor was fabricated by integrating tetrahexahedral (THH) Au-Pd core–shell nanocrystals on reduced graphene oxide (rGO) nanosheets . Furthermore, the nanocomposites combined the large specific areas of rGO with the high-index facets and excellent electrocatalytic activity of the THH Au-Pd nanocrystals, and the nanocomposites were an essential adapter for detecting epinephrine. In the present work, transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) were used to identify and characterize these unique nanocomposites, and the results revealed that a unique THH Au-Pd/rGO core–shell nanostructure was synthesized successfully. To further explore the electrochemical behaviors of these nanomaterials at a GC electrode, we applied cyclic voltammetry (CV), differential pulse voltammetry (DPV) and amperometry to study the conductivity and electrocatalytic activity of the proposed sensor, and the results suggested that the sensor based on Au-Pd/rGO presented a lower limit of detection (0.0012 μM at a signal to noise ratio of 3), wide linear detection range (0.001 µM to 1000 µM), and extraordinary selectivity and reproducibility. Moreover, the data showed that the sensor possessed good stability and acceptable accuracy to detect epinephrine in human serum samples. In summary, this work is not only a potential way to manufacture various nonenzymatic sensors but also a significant contribution to further studies in catalysis, cell fuel cells and other relevant applications.
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DOI
高影响因子
MATERIALS TECHNOLOGY
·
2015
·
IF 1.227
F.-B. Meng,H. Xu,W. Li,Q.-W. Liu,S.-M. Gao,X.-C. Ji,Q. Xu,Y. Kong
In this paper, a simple, one-step chemical synthesis of Au@poly(m-phenylenediamine) (PMPD) core-shell nanoparticles by direct dropping aqueous chloroauric acid aqueous solution to m-phenylenediamine aqueous solution was reported, which is a facile and green method. We further evaluate the use of the obtained Au@PMPD to modify glassy carbon electrode and for H2O2 electrocatalytic biosensing. The results indicate that the aggregated small Au nanoparticles in the inner part of PMPD could be an ideal sensing platform for H2O2 detection.
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DOI
高影响因子
ACS Applied Bio Materials
·
2019
·
IF 0
Hui Zhang,Yiming Wang,Hua Zhong,Jie Li,Caifeng Ding
Gold-based nanomaterials are widely used in the field of photothermal therapy (PTT) of cancer cells because of the low cytotoxicity and excellent photothermal conversion efficiency upon near-infrared (NIR) light irradiation. Hollow gold nanoparticles exhibited enhanced interaction with light and surrounding media due to larger exposed surface than solid nanoparticles and can be used to develop sensitive NIR sensors in biomedicine. Here we designed an NIR light-controlled biosensing strategy that employs dual Pt@Au nanoring@DNA (PAD) probes for fluorescence imaging and targeted PTT of cancer cells. The probes had Au nanoring with Pt framework (Pt@AuNR) as a photosensitizer and functionalized double-stranded DNA (dsDNA) hybrids as a sensor. The cell-subtype-specific recognition and fluorescence imaging were controlled by NIR light irradiation through the dehybridization of dsDNA as a result of temperature elevation localized on the PAD probe. The targeted PTT of cancer cells was excellent under the control of NIR light due to the strong absorption of Pt@AuNRs in the NIR region. The majority of target tumor cells were killed under the photothermal effect after incubating with the dual PAD probes and receiving artificial laser irradiation. The dual PAD probe system successfully described NIR light-activated cancer cell diagnosis and therapy, including the activation of specific recognition, fluorescence imaging, and targeted PTT. This work has provided a promising platform on which NIR light-controlled targeted theranostic may be developed.
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DOI
Nano Research
·
2021
·Vol. 15
·期 1
·317-325
·
IF 8.897
Zuo Zewen,Sun Lianye,Guo Yongbin,Zhang Lujun,Li Junhu,Li Kuanguo,Cui Guanglei
Plasmon coupling is an essential strategy to realize strong local electromagnetic (EM) field which is crucial for high-performance plasmonic devices. In this work, multiple plasmon couplings are demonstrated in three-dimensional (3D) hybrid plasmonic systems composed of polydimethylsiloxane-supported ordered silver nanocone (AgNC) arrays decorated with high-density gold nanoparticles (AuNPs) which are fabricated by a template-assisted physical vapor deposition process. Strong interparticle coupling, particle-film coupling, inter-cone coupling, and particle-cone coupling are revealed by numerical simulations in such composite nanostructures, which produce intense and high-density EM hot spots, boosting highly sensitive and reproducible surface enhanced Raman scattering (SERS) detection with an enhancement factor of ∼ 1.74 × 10 8 . Furthermore, a linear correlation between logarithmic Raman intensity and logarithmic concentration of probe molecules is observed in a large concentration range. These results offer new ideas to develop novel plasmonic devices, and provide alternative strategy to realize flexible and high-performance SERS sensors for trace molecule detection and quantitative analysis.
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DOI
高影响因子
JOURNAL OF CHEMICAL PHYSICS
·
2022
·Vol. 156
·期 17
·
IF 4.304
Xi Xiaonan,Li Yuanyuan,Liang Tianyuan,Wu Huaxin,Miao Ruonan,Gu Chao,Fan Jiyang
The semiconductor–metal heteronanocrystals (HNCs) that possess a perfect epitaxial interface can accommodate novel and interesting physical phenomena owing to the strong interaction and coupling between the semiconductor excitons and metal plasmons at the interface. Here, we fabricate the pyramidal ZnO–Au HNCs and study their unique photophysical properties. Several Au nanospheres are perfectly epitaxially bound with a single ZnO NC owing to the small lattice mismatch between them and there are also ZnO–Au–ZnO sandwiched HNCs. There is a strong coupling between the green defect-associated recombination in the ZnO NC and the localized surface plasmon resonance (LSPR) of the Au nanosphere at the interface of the HNC. This leads to resonant defect recombination–LSPR energy transfer and resultant nearly complete quenching of the green defect luminescence of the ZnO NCs in the HNCs, leaving only the UV exciton luminescence. The lifetimes of both the green and UV emission bands decrease significantly in the ZnO–Au HNCs relative to that of the pure ZnO NCs owing to the combined effect of resonance energy transfer and surface plasmon enhanced radiative transition. The exponent of the luminescence intensity–excitation intensity power function for the green emission band is remarkably smaller than unity, and this suggests that the involved defects have an intermediate concentration.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Huiyan Feng,Yuanyan Luo,Bowen Yan,Haobo Guo,Lanqi He,Zhi Qun Tian,Panagiotis Tsiakaras,Pei Kang Shen
Despite the remarkable research efforts, the lack of ideal activity and state-of-the-art electrocatalysts remains a substantial challenge for the global application of fuel cell technology. Herein, is reported the synthesis of Au@PtNiAu concave octahedral core-shell nanocatalysts (Au@PtNiAu-COCS) via solvothermal synthesis modification and optimization approach. The special structure generating a large number of step atoms, enhancing the oxygen reduction reaction (ORR) and methanol oxidation reaction (MOR) activity and stability. The superior ORR mass activity of the Au@PtNiAu-COCS is 11.22 times than the exhibited of Pt/C initially by Pt loading, and 5.11 times by Pt + Au loading. After 30 k cycles the mass activity remains 78.8% (8.83 times the initial Pt/C activity) and the half-wave potential only shifts 12 mV. Au@PtNiAu-COCS has superior half-cell activity and gives ideal membrane electrode assemblies. Furthermore, for MOR the Au@PtNiAu-COCS show enhanced anti-toxic (tolerant) ability in CO. This work provides a new strategy to develop core-shell structure nanomaterials for electrocatalysis.
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DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yuanyuan Yao,Xiaomei Zhang,Na Li,Xuming Liang,Yangping Wen,Hui Zhang,Yilong Chen,Dajian Yang,Jingkun Xu
A novel simple, sensitive and selective electrochemical sensor was successfully prepared for the determination of esculetin in Cortex Fraxini based on the carboxylic acid-functionalized single-walled carbon nanotubes-Nafion–Au nanosol nanocomposite modified glassy carbon electrode (c-SWCNTs-NF–AuNs/GCE). Scanning electron microscopy, energy dispersive X-ray spectroscopy, electrochemical impedance spectroscopy and cyclic voltammetry were carried out to characterize the properties of c-SWCNTs-NF–AuNs nanocomposite. Owing to the synergistic effects of large surface area, superior electrical conductivity, and large amount of chemically active sites of c-SWCNTs, together with the good biocompatibility and high conductivity of AuNs, the c-SWCNTs-NF– AuNs/GCE exhibited a good electrocatalytic activity to esculetin with wide linear range of 0.004–55 μM and low detection limit of 0.12 nM. Additionally, the modified electrode was employed for analysis of esculetin in Cortex Fraxini with satisfactory results.
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高影响因子
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