Advanced Materials Interfaces
·
2023
·Vol. 10
·期 23
·2300187
·
IF 5.4
Juan Wang,Weijie Zhou,Qianwen Wei,Guangsheng Liu,Xibin Yuan,Hua Pen,Guijun Zhang,Rongfei Wang,Chong Wang,Yu Yang
Solar cells formed by spin-coating organic absorber layers on silicon have attracted widespread attention due to their simple processes and high photovoltaic conversion efficiency (PCE). In typical organic/Si solar cells, however, surface defects or unsatisfactory carrier separation are inadequate to yield excellent device performance. Here, the Au@MoS 2 nanocomposites are well synthesized and doped into the organic layer of poly (3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT:PSS) to improve its work function and the performance of PEDOT:PSS/Si HSCs consequently. By optimizing the doping level of Au@MoS 2 , the PCE significantly improved from 11.48% to 14.0% by tuning the work function of the PEDOT:PSS layer to more appropriate values. The calculated results based on the Mott–Schottky model indicate that the built-in field in the PEDOT:PSS/Si interface of HSCs is significantly enhanced due to the increase of work function by the PEDOT:PSS thin films. The enhancement of the built-in field results in the reduction of the electron–hole recombination loss effectively. The work provides a feasible method for preparing high-performance PEDOT:PSS/Si HSCs.
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CARBOHYDRATE POLYMERS
·
2012
·
IF 3.628
Tong Chen,Tong Zhao,Dongfeng Wei,Yanxia Wei,Yuanyuan Li,Haixia Zhang
Core–shell structured multifunctional nanocarriers (NCs) of ZnO quantum dots-conjugated gold nanoparticles (Au NPs) as core and amphiphilic hyperbranched block copolymer as shell were synthesized for targeted anticancer drug delivery. The amphiphilic hyperbranched block copolymer contained poly( l -lactide) (PLA) inner arm and folate (FA)-conjugated a sulfated polysaccharide from Gynostemma pentaphyllum Makino (GPPS-FA) outer arm. The structure and properties of core–shell structured multifunctional nanocarriers were characterized and determined by UV–visible spectra, FT-IR spectra, X-ray diffraction (XRD), fluorescence spectroscopy and TEM analyses. The release results indicated that camptothecin (CPT) release from NCs at pH 7.4 was much greater than that at pH 5.3. The cytotoxicity studies showed that both the blank NCs and the CPT-loaded NCs provided high anticancer activity against Hela cells. Furthermore, nanocarriers gained specificity to target model cancer cells in this study due to the enhanced cell uptake mediated by FA moiety. The results indicated that the NCs not only had great potential as tumor-targeted drug delivery nanocarrier, but also had an assistant role in the treatment of cancer.
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Fan Wang,Rui Xu,Xianghan Ye,Yating Zhu,Jiayin Wang,Kefei Cheng,Kaijia Xu,Yinyin Qian
Among heavy-metal-free III-V colloidal nanocrystals, Indium antimony (InSb) stands out as a promising candidate for constructing solution-processed broadband photodetectors (PDs) owing to its ultranarrow bandgap and exceptionally high carrier mobility. However, the high affinity of Sb element for oxygen makes InSb susceptible to native surface oxidation, a process that creates barriers to carrier transport and reduces light absorption efficiency, thereby significantly degrading the performance of InSb-based PDs. In this study, we propose a solution-based route for fabricating InSb nanowires (NWs) decorated with Au nanoparticles (NPs) to fabricate a broadband, self-driven PD. The incorporation of Au NPs significantly reduces the surface trap states introduced by surface native oxide layer and enhances the performance of the PD across the visible to near-infrared (NIR) region. Compared with bare InSb NWs PDs, the Au/InSb nanohybrid device achieves a dramatic improvement in the switching ratio, reaching approximately 300 under visible-to-NIR illumination at an intensity of 36 mW/cm 2 . The maximum responsivity and detectivity values of the Au/InSb nanohybrid PD were 100 times higher than those of bare InSb NWs. Finite-difference time-domain (FDTD) simulations were employed to analyze the spatial distribution of the electromagnetic field across Au/InSb nanohybrids. The localized surface plasmon resonance (LSPR) of Au NPs and the transfer of hot electrons were identified as key factors contributing to the observed performance enhancement. This study serves as a foundational exploration of the potential for high-performance PDs utilizing Au NPs and other narrow-band III-V materials exhibiting LSPR effects.
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高影响因子
Journal of Physical Chemistry C
·
2018
·
IF 4.484
Tengfei Long,Hongmei He,Jizhou Li,Mengke Yuan,Jianjia Wei,Zhongde Liu
Inspired by the knowledge that the chiroptical activity of Cu and Ag nanoclusters (NCs) is generally about several-fold larger than that of the corresponding Au NCs but poor stability and that alloy metal particles often demonstrate unique stability, in this contribution the synthesis of the chiral Au–Cu alloy NCs was attempted via reduction of varying mole fractions of metal precursors by sodium borohydride in the presence of d-/l-penicillamine (d-/l-Pen), to gain insights into the alloying effect on the chiroptical activity. As a result, the g factors of ∼0.57 × 10–3, obviously larger than that of the pure Au NCs, are found for the bimetallic Au–Cu NCs, suggesting that the incorporation of Cu heteroatoms plays a dramatic role for the creation of the strong optically active metal nanostructures. More importantly, compared with those of monometallic Cu counterparts, the optical active stability of bimetallic Au–Cu NCs is obviously improved because of the alloy formation. The location of the copper dopant, observed from the transmission electron microscopy results and deduced by the X-ray photoelectron spectroscopy measurements, can be speculated to be incorporated in both the “core” region and the “staple” region. Additionally, it was found that the different thiolated chiral molecule ligands exert influence on the chiroptical behavior of the Au–Cu NCs. Thus, the alloy formation strategy could produce novel nanostructures with the characteristic of large and stable chiroptical activity.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2018
·Vol. 124
·期 12
·1-9
·
IF 1.604
Lin Shuang,Lin Xiang,Zhao Haiyan,Hasi Wuliji,Wang Li
Quantitative analysis always encounters difficulty in the field of surface-enhanced Raman spectroscopy (SERS) because of the lack of accurate and reliable analytical means. In this work, a new approach was demonstrated for the quantitative SERS measurement by self-assembled superlattice based on ultra-smooth Au nanospheres (NSs) embedded with 4-methylthiobenzoic acid (4-MBA) as the internal reference. Malachite green (MG) in water and chrysoidine in drinks with detection limit of 0.35 µM were successfully and quantitatively measured by employing Au@4-MBA@Au NSs superlattice as solid SERS substrate. Compared with conventional SERS methods, the fitting linearity of the relative SERS intensity vs. analyte concentrations has significantly improved by this new analysis means. As a result, our approach is a reliable analytical strategy to solve quantitative problems in SERS analysis, which can be easily applied for on-site detection and for preliminary monitoring of food samples.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Hailun Zhao,Chao Wang,Weilin Zhong,Suqing Peng,Riyang Shu,Zhipeng Tian,Ying Chen
Probing the effect of spatial morphology of catalyst on its photothermal catalytic performance is crucial for solar-driven renewable catalytic reforming of hydrogen production . In this study, Au nanoparticles loaded on various morphologies of TiO 2 nanoparticles were synthesized and characterized. The experimental results indicated that decorating TiO 2 with Au nanoparticles could dramatically increase its photocatalytic activities by 20–40 times. The photothermal conversion efficiency of Au/TiO 2 (12.74%–25.54%) was higher than those of TiO 2 due to the introduction of LSPR of Au nanoparticles could effectively improve the utilization of solar spectrum. Titania nanoflower (TNF) nanoparticles with high light absorption capacity , better colloidal dispersion stability , porous properties and narrow band gap represented the highest H 2 productivity (144.13 μmol·g −1 ·h −1 ). The coarse surface structure was also conducive to the dispersion of gold particles on the surface of the carrier and the growth rate of Au/TNF hydrogen production (40 times) which was higher than that of other morphology within 2 h. The results of glycerol photothermal hydrogen generation highlighted the effect of temperature on colloidal dispersion stability and hydrogen production capability of nanoparticle suspension. It demonstrated that the photothermal effect aroused a temperature rise that would deteriorate the dispersion stability of the suspension although a local entropy increase in the catalyst nanoparticles might occur. At the same time, the temperature rise caused by the photothermal effect efficiently produces hydrogen in the reaction temperature range. Therefore, an ideal temperature setting for maximal hydrogen generation could be validated and improved the photothermal synergistic impact on biomass-reformed hydrogen generation.
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ACS Applied Nano Materials
·
2022
·
IF 6.14
Yali Liu,Hongliang Dong,Haowei Huang,Wei Zong,Yue-E Miao,Guanjie He,Ivan P. Parkin,Feili Lai,Tianxi Liu
Noble-metal nanoparticles are regarded as one of the most promising catalysts to reduce the organic pollutant 4-nitrophenol (4-NP). However, the inevitable agglomeration of noble-metal nanoparticles and their poor distributions in catalytic systems limit their performance. Here, we propose a strategy to encapsulate Au nanoparticles inside porous organic cages (POCs) of soluble RCC3 and stabilize the size of Au nanoparticles at ∼3.25 nm. Typically, the Au@RCC3 composite exhibits excellent 4-NP catalytic reduction performance, which is superior to the corresponding Au bulk catalyst and is also closely related to the size of Au nanoparticles. The normalized X-ray absorption near-edge structure (XANES) results indicate that the electron deficiency at the Au atoms in Au@RCC3 is due to the existence of the RCC3 cage, which is beneficial to accelerate the electron transfer from BH4– to 4-NP during the hydrogenation process. This is also shown by density functional theory (DFT), in which a low energy barrier of 1.03 eV exists for the Au12 cluster compared with 1.37 eV for the Au25 cluster. Therefore, the encapsulation of noble-metal nanoparticles with soluble POCs is an effective way to design and develop stable active catalysts rationally.
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ANALYST
·
2014
·Vol. 139
·期 17
·4216-4222
·
IF 3.906
Chong Sun,Lie Ma,Qiuhui Qian,Soniya Parmar,Wenbo Zhao,Bo Zhao,Jian Shen
Analysts are always interested in finding new functional nanomaterials and devices with good properties for electrochemical sensor applications. In this paper, hyperbranched polyester nanoparticles with carboxylic acid functional groups (HBPE–CA NPs) were synthesized and combined with chitosan wrapped around Au nanoparticles (CS–Au NPs) to prepare a novel and sensitive electrochemical immunosensor by adsorption of carcinoembryonic antibody (anti-CEA) on the (HBPE–CA)/CS–Au NPs modified glass carbon electrode (GCE). Under the optimized conditions, the proposed immunosensor displayed a good amperometric response to carcinoembryonic antigen (CEA). Moreover, based on the antibiofouling properties, the immunosensor could be used for the direct detection of CEA in whole blood, and exhibited a wide detection range (1–107 fg mL−1), and a low detection limit of 0.251 fg mL−1 (signal/noise = 3). Control experiments were also carried out by using ascorbic acid (AA), uric acid (UA), human immunoglobulin G (IgG), BSA and glucose in the absence of CEA. The good stability and repeatability of this immunosensor were also proven. Importantly, the results of the detection of clinical whole blood specimens with the proposed immunosensor showed good consistency with the data determined by enzyme-linked immunosorbent assay (ELISA) in serum samples. Furthermore, the developed immunosensor could provide a promising immunoassay strategy for clinical applications, since the values we measured in whole blood directly are likely closer to the real values.
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PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 41
·19824-19833
·
IF 3.925
Xiaoxia Liu,Yang Wu,Yangyang Wang,Huiying Wei,Jinxin Guo,Yanzhao Yang
Liquid–liquid extraction technology based on ionic liquids (ILs) is an efficient and environmentally friendly method to recover Au(III). This work aims to separate Au(III) from hydrochloric acid media using a novel IL [DBA-Pyr][NTf2], which is a pyrrolidinium-based IL functionalized with amide groups. Firstly, experiments have been carried out under optimal conditions, including the concentration, acidity and temperature. It turns out that low concentrations of hydrochloric acid help in Au(III) extraction, while the increase of chloride ion concentrations has an adverse effect. Then, through Job's method, extraction complexes with a molar ratio of [DBA-Pyr][NTf2]-to-Au(III) of 1 : 1 were determined. And, the anion exchange extraction mechanism was confirmed by FT-IR, UV-Vis, and 13C NMR spectroscopies and an electrostatic potential energy (ESP). Under the optimal extraction conditions, it has excellent selectivity to Au(III) compared to both base metal ions and platinum group metals (PGMs). Furthermore, Au(III) could also be recovered from the IL phase using an aqueous solution of thiourea in 95.6% with high selectivity. After 4 cycle experiments, an extraction efficiency of more than 90% is still maintained. The results show that [DBA-Pyr][NTf2] has potential application prospects in Au(III) recovery from hydrochloric acid media.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Min Wang,Qi Wang,Junzheng Wang,Ronghao Liu,Guanju Zhang,Yanzhao Yang
Two ionic liquid (IL) thermomorphic systems were designed. The thermoregulated property exhibited by the IL systems was utilized for the recovery of Au(III) from acidic medium. The cloud point order of the two ILs was proposed and evidenced via a combination of experimental measurements and quantum chemical calculations. The impacts of salt ions and acid on the thermomorphic phase behavior of the IL–H2O binary mixture system were investigated. After comprehensive comparison, a systematic study of Au(III) extraction by the [Suc][Tf2N]2 (succinyl bis(trifluoromethylsulfonyl)imide) system was carried out because of its outstanding hydrophobicity and extraction ability. Then, a comparison between traditional liquid–liquid extraction (TLLE) and homogeneous liquid–liquid extraction (HLLE) was made during the process of optimization of various extraction parameters. In addition, the anion-exchange mechanism in the extraction process was revealed. The thermoregulated [Suc][Tf2N]2 system presented an excellent selectivity for Au(III) in a solution of coexisting multimetallic ions. Finally, Au(III) was almost completely stripped from the loaded IL phase by oxalic acid. The extraction efficiency of Au(III) using regenerated IL still maintains a surprising stability after five turns of cycling experiments. Hence, the dicationic IL [Suc][Tf2N]2 was regarded as a potential extractant for the recovery of gold.
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2020
·Vol. 20
·期 9
·5539-5545
·
IF 1.134
Yin Hao Yong,Zheng Yi Fan,Wang Ling
A convenient and simple phenol electrochemical sensor was constructed based on the Au/CeO2/ g-C3N4 nanocomposites, which were obtained by loading the gold–cerium oxide (Au/CeO2) nanoparticle on graphite-like carbon nitride (g-C3N4)
through precipitation–reduction methods. The microstructure and morphology of Au/CeO2/g-C3N4 nanocomposite were verified using different techniques such as XRD, TEM, and HRTEM. Voltammetry and amperometry methods were used to study the electrochemical
performance of the constructed phenol electrochemical sensors. The results demonstrated evidently that the combination of Au/CeO2 and g-C3N4 may improve sensing performances of phenol determination. The detection linear range of the sensor was 10–90 μM
under the optimum parameters. The Au/CeO2/g-C3N4 based electrochemical sensor also has low detection limits (2.33 μM) and high sensitivities (0.1080 mA/μM) for phenol detection. In addition, the sensor also had considerably favorable anti-interference
performance. As a consequence, the sensor demonstrated that the electrochemical system provided a promising effective strategy for detection of phenol.
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Frontiers in Veterinary Science
·
2022
·
IF 3.471
Liao Yan-Juan,Li Duo-Duo,Cai Zong-Ling,Cao Ying,Yu Dong-Ling,Zhang Hong-Yun,Kiflu Abraha Bahlbi,Huang Zai Yin,Li Xiao-Ning,Luo Ting Rong
Rabies is a fatal encephalitis caused by the rabies virus. The diagnosis of the disease depends in large part on the exposure history of the victim and clinical manifestations of the disease. Rapid rabies diagnosis is an important step in its prevention and control. Therefore, for accurate and timely diagnosis and prevention of rabies, we developed nanomaterials for a novel photoelectrochemical biosensing approach (PBA) for the rapid and reliable diagnosis of rabies virus. This approach uses high-efficiency exciton energy transfer between cadmium telluride quantum dots and Au nanoparticles and is low cost, and easy to miniaturize. By constructing PBA, rabies virus can be detected quickly and with a high degree of sensitivity and specificity; the minimum detection concentration limit for rabies virus is approximately 2.16 ffu/mL of rabies virus particles, or 2.53 × 101 fg/mL of rabies virus RNA. PBA could also detect rabies virus in the brain and lung tissue from rabid dogs and mice with better sensitivity than RT-PCR.
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高影响因子
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