JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 8
·5161-5173
·
IF 2.779
Weng Siyuan,Zhao Man,Jiang Dayong
Organic/inorganic hybrid material properties and their interfaces are essential to obtain excellent device performance. In this paper, an heterojunction ultraviolet (UV) organic photodetector (OPD) based on organic/inorganic zinc oxide (ZnO)/aurum (Au)/poly (3,4-ethylenedioxythio-phene):poly(4-styrene-sulfonate) (PEDOT:PSS) was manufactured and display outstanding photoelectric performance. For the fabrication of ZnO/Au/PEDOT:PSS heterojunction UV OPD, this heterojunction exhibits excellent UV optical detection performance. And further analysis using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), energy dispersive X-ray (EDX) and atomic force microscope (AFM). Compared with ZnO UV PD, the responsivity of ZnO/Au/PEDOT:PSS heterojunction UV OPD reaches 0.181 A W −1 , which is about 3.69 times higher. Furthermore, ZnO/Au/PEDOT:PSS heterojunction UV OPD shows light-to-dark current ratio (I light /I dark ) (1.19 × 10 3 ), external quantum efficiency (EQE) (59%), detectivity (D*) (1.39 × 10 11 Jones) and linear dynamic range (LDR) (61.5 dB). The preparation of inorganic/organic ZnO/Au/PEDOT:PSS heterojunction UV OPD in this work exhibits small organic/inorganic stress at the heterojunction, which provides new insights for the research of organic/inorganic hybrid UV OPDs and application prospects.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 9
·1453
·
IF 5.719
Chen Wang,Luyao Feng,Junxiao Liu,Jing Fu,Jinglin Shen,Wei Qi
Au nanocluster (AuNCs)-based luminescent functional materials have attracted the interest of researchers owing to their small size, tractable surface modification, phosphorescence lifetime and biocompatibility. However, the poor luminescence quantum yield (QY) of AuNCs limits their practical applications. Herein, we synthesized a type of AuNCs modified by 4,6-diamino-2-mercaptopyrimidine hydrate (DPT-AuNCs). Furthermore, organic acids, i.e., citric acid (CA) and tartaric acid (TA), were chosen for co-assembly with DPT-AuNCs to produce AuNCs-based luminescent materials with enhanced emission. Firstly, it was found that CA could significantly enhance the emission of DPT−AuNCs with the formation of red emission nanofibers (QY = 17.31%), which showed a potential for usage in I−detection. Then···π/π···π interaction between the CA and the DPT ligand was proposed as crucial for the emission. Moreover, chiral TA could not only improve the emission of DPT-AuNCs, but could also transfer its chirality to DPT-AuNCs and induce the formation of circularly polarized luminescence (CPL)-active nanofibers. It was demonstrated that the CPL signal could increase 4.6-fold in a ternary CA/TA/DPT-AuNCs co-assembly system. This work provides a convenient way to build AuNCs-based luminescent materials as probes, and opens a new avenue for building CPL-active materials by achiral NCs through a co-assembly strategy.
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高影响因子
Russian Journal of Physical Chemistry A
·
2022
·Vol. 96
·期 11
·2490-2496
·
IF 0.791
Khan Misbah Ullah,Ullah Hayat,Honey Shehla,Gul Zarif,Ullah Shaheed,Ullah Bakhtar,Manan Abdul,Ullah Munzer,Ali Shad
Abstract Noble metal bimetallic nanostructures, such as Ag and Au, are used in a variety of fields including nanoscience, catalysis, electronics and nanotechnology because of high stability and adsorption rate etc. However controlled synthesis of bimetallic nanostructures is challenging. Therefore, the current study emphasizes on two step controlled synthesis of Au/Ag nanostructures with tunable sizes for catalytic purposes. Using electrochemical deposition (EC) technique, the fabrication of Au/Ag nanostructures were achieved in two stages, through galvanic reaction. The catalytic capabilities of an Au/Ag nanostructure and Ag flower-like structure were examined through reduction of p -nitrophenol in the presence of sodium borohydride (NaBH 4 ). The catalytic investigation was measured in temperatures rage of 25 to 45°C at constant time. The study shows that catalytic activity of Au/Ag nanostructure is higher than that of Ag flower-like structure in the reduction of p -nitrophenol.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Lang Yang,Feifei Jia,Shaoxian Song
The recovery of gold cyanide complex Au(CN) 2 − from gold cyanidation with graphene oxide (GO) and GO hydrogel have been studied to explore the possibility of the application of GO or GO hydrogel in gold cyanidation process for extracting gold. The study was performed on the adsorption of artificial Au(CN) 2 − aqueous solution on GO and GO hydrogel. The adsorption results, as well as the SEM-EDS, AFM and XPS, demonstrated that GO was a better adsorbent for the recovery of Au(CN) 2 − from aqueous solution than conventional activated carbon because of its higher adsorption capacity and adsorption rate. It has been also found that the adsorption of Au(CN) 2 − on GO followed the Langmuir isotherm and fitted well with both the pseudo-first-order and pseudo-second-order kinetics models. The recovery of Au(CN) 2 − with GO might be attributed to the interaction between Au(CN) 2 − and oxygenous function groups on GO surface. GO hydrogel exhibited excellent Au(CN) 2 − adsorption property and easy separation, which enabled it a potential adsorbent in gold cyanidation.
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高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Xuan Fu,Limei Yin,Yang Zhang,Ruiyun Zhou,Hesham R. El-Seedi,Xiaobo Zou,Yunyun Gong,Zhiming Guo
Aflatoxin B1 (AFB1) is a prevalent contaminant in maize, posing significant threats to human health. This study designed Au Ag Janus NPs with intrinsic Raman signals as signal probes and SiO 2 @AgNPs as capture probes. The two were coupled through complementary base pairing to ensure the ordered, controlled distribution of noble metal nanoparticles. The Au Ag Janus NPs and the highly stable SiO 2 carrier is expected to avoid the adverse effects on stability caused by using signal molecules and the formation of random aggregates when using the noble metal nanoparticle gap effect to concentrate on the electromagnetic field. This study improved the negative impact of AgNPs' high surface energy on their uniformity, while enhancing the pH adaptability of Au Ag Janus NPs. In the presence of AFB1, the composite disintegrates, and the SERS intensity showed a negative correlation with AFB1 concentration, enabling highly sensitive and stable detection of AFB1.
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DOI
PubMed
高影响因子
Nano-Micro Letters
·
2024
·Vol. 16
·期 1
·1-21
·
IF 31.6
Zhou Xi,Zhou Quan,He Zhaozhi,Xiao Yi,Liu Yan,Huang Zhuohang,Sun Yaoji,Wang Jiawei,Zhao Zhengdong,Liu Xiaozhou,Zhou Bin,Ren Lei,Sun Yu,Chen Zhiwei,Zhang Xingcai
The innovation of this work mainly lies in the auto-regulation of reactive oxygen species (ROS) balance effective by combination of ROS antibacterial and ROS scavenging anti-inflammatory functions with a core–shell nanoplatform (CeO 2 @ZIF-8/Au), which can not only achieve high antibacterial efficiency, but also promote wound healing, and provide a new idea for the nano-catalytic system in the field of wound healing of bacterial infection.
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PubMed
高影响因子
Journal of Physical Chemistry C
·
2025
·
IF 3.2
Yitao Ping,Miao Wang,Yuchen Zhang,Shan Liu,Yue Sun,Weihua Zhang,Zhenda Lu
Quantum dots (QDs) and plasmonic Au nanorods (NRs) offer unique optical properties that can be exploited for a variety of applications. To optimize the interaction between these two materials, precise control over their spatial arrangement is essential. Here, we applied modified atomic force microscopy (AFM) nanoxerography to assemble a nanoarray composed of well-defined Au NR/QD hybrid clusters. By precisely controlling the NR orientation and the spectral overlap, we can manipulate the fluorescence polarization of QDs. Our approach enables detailed studies of single-particle interactions, providing valuable insights into the design and optimization of plasmonic nanostructures for advanced optoelectronic applications.
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高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Xiaoxuan Ren,Yue Sun,Shengjie Li,Junyuan Bai,Xuwen Gao,Guizheng Zou
The commercialized immunoassay of glow-type chemiluminescence (CL) is always performed in an enzyme-assisted and indirect CL way, with molecular luminophores as tags. Herein, dual-stabilizer-capped Au nanoclusters (NCs) are proposed as nanoparticulate glow-CL luminophores and perform automatic immunoassays on commercialized in vitro diagnosis (IVD) instruments in a direct and enzyme-free CL way. The thiosalicylic acid (TSA) and bovine serum albumin (BSA) stabilized AuNCs (TSA/BSA-AuNCs) are water-soluble, biocompatible, and n-type CL luminophores, which can give off dark-red and glow-type CL with the coexistence of both hydrazine hydrate (N2H4·H2O) and hydrogen peroxide (H2O2). The glow-CL of TSA/BSA-AuNCs is generated in a combined route of bandgap-engineered CL (∼711 nm) and surface-defect-engineered CL (∼860 nm), and its total emission is strong enough to linearly determine procalcitonin (PCT) from 0.1 to 5000 pg/mL with a limit of detection of 0.05 pg/mL (S/N = 3), which is superior to the limit of detection for all of the commercialized CL immunoassays. Promisingly, TSA/BSA-AuNCs can be safely stored over 5 months and safely labeled to proteins without permanent precipitation and damage, which are strongly anticipated for the design of CL reagent kits with nanoparticles as tags and might initiate the commercialized application of NCs CL.
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PubMed
高影响因子
ANALYST
·
2024
·
IF 3.6
Juan Huang,Huaxu Zhou,Yanqi Zou,Huiqing Liu,Qianjin Chen
An electrochemical method was developed for ultrasensitive and selective detection of dopamine in human serum using mesoporous silica thin film modified gold microelectrodes. Vertically aligned mesoporous silica thin films were deposited onto Au microelectrodes by electrochemically assisted self-assembly (EASA). The mesochannels have uniform pore sizes of 2.1 nm in diameter and a negatively charged wall surface. Cyclic voltammetry reveals effective charge permselectivity through the negatively charged mesoporous channels. By using differential pulse voltammetry, the mesoporous silica thin film modified Au microelectrode can be employed for the ultrasensitive detection of dopamine with a detection limit as low as 0.084 μM. In addition, thanks to the electrostatic and steric effects of the silica mesochannels, excellent anti-interference and anti-fouling properties of the electrochemical sensors are demonstrated.
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PubMed
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Yongling Du,Min Guo,Yan Chen,Xiaohui Mo,Junlei Cao,Fangdi Hu
Cortisol, a corticosteroid hormone as a primary stress hormone response to internal and external stress, has been regarded as a gold standard reliable biomarker to evaluate human mental stress. The double enzymes strategy, using nanozyme and enzyme amplifying the electrochemical signal, has been widely used to improve the performance of electrochemical biosensors. An ultra-sensitive electrochemical cortisol sensor based on Au single-atom nanozymes had been fabricated through HRP labeled anti-cortisol antibody binding with Au by Au-S bond. Based on the high catalytic activity of Au single-atom nanozymes and the high selectivity of HRP-labeled anti-cortisol antibodies, the cortisol electrochemical sensor-based Au single-atom nanozymes had an excellent response to cortisol, such as high electrochemical activity, high sensitivity, high selectivity, and wide linear range (0.15–300 ng.mL −1 ) and low detection (0.48 pg.mL −1 ) through the four-parameter logistic model with 95% confidence. The electrochemical cortisol sensor was used to determine the cortisol concentration of human saliva at different times.
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PubMed
高影响因子
Advanced Materials Interfaces
·
2019
·Vol. 7
·期 2
·1901703
·
IF 4.713
Weicai Zhang,Jing Peng,Mingtao Zheng,Hanwu Dong,Hang Hu,Yong Xiao,Yingliang Liu,Yeru Liang
Assembling of well-orientated mesopores and 0D substance into an orchestrate architecture for constructing advanced carbon-based composites is highly attractive. Currently, this nanofabrication method is facing challenges, because of the difficulty in the co-assembly of the building blocks is very hard to perform onto a high-curvature and heterogeneous 0D substrate. Here, an efficient active nanointerface-assisted co-assembly approach for design and fabrication of a novel class of yolk–shell Au@ordered mesoporous carbon nanosphere is reported. The key point to this preparation strategy is construction of reactive aldehyde functional groups on the surface of Au@SiO 2 nanospheres, which can react with the carbon source to in situ form a stable covalent bond at their nanointerface. The as-synthesized yolk–shell Au@ordered mesoporous carbon nanosphere not only exhibits uniform spherical morphology and robust porosity but also possesses a totally new ordered mesoporous and fast permeable shell structure, providing a chance for greatly broadening their application scope.
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高影响因子
Micromachines
·
2018
·Vol. 9
·期 12
·678
·
IF 2.222
Pinhua Zhang,Haoming Sun,Wenhui Guan,Jinjin Liang,Xiaomeng Zhu,Junkai Zhang,Min Chen,Meng Cao,Wenbing Qian,Kefu Gao,Guangliang Cui
The nanostructures with uniform long-range ordered structure are of crucial importance for performance standardization of high-quality surface-enhanced Raman scattering (SERS) spectra. In this paper, we described the fabrication and SERS properties of Au decorated Cu (Au@Cu) nanoarrays. The Cu nanoarrays with uniform long-range ordered structure were first synthesized by in-situ electrochemistry assembly on insulated substrate. The Cu nanoarrays can reach a size of centimeters with strictly periodic nano-microstructure, which is beneficial for the production and performance standardization of SERS substrates. Then Au nanoparticals were decorated on the Cu nanoarrays by galvanic reaction without any capping agent. The obtained Au@Cu nanoarrays exhibit excellent SERS activity for 4-Mercaptopyridine, and the sensitivity limit is as low as 10−8M. Therefore, this facile route provides a useful platform for the fabrication of SERS substrates based on nano ordered arrays.
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