Scientific Reports
·
2017
·Vol. 7
·期 1
·1-11
·
IF 4.259
Zhao Jiangtao,Zhang Peng,Wang Zhuo,Zhang Shijie,Gao Hongqing,Hu Junhua,Shao Guosheng
In the field of photocatalysis, the high-charge recombination rate has been the big challenge to photocatalytic conversion efficiency. Here we demonstrate the direct evidence of multichannel-improved charge-carrier mechanism to facilitate electron-hole transfer for raising photocatalytic H 2 evolution activity. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and UV-Vis diffuse reflectance spectroscopy (DRS), were used to characterize the as-fabricated samples. The result shows that the present design of Au/Pt nanoparticles (NPs) decorated one-dimensional Z-scheme TiO 2 /WO 3 heterostructure composite nanofibers have been fabricated, which even exhibited excellent light absorption in the visible region and greatly enhanced photocatalytic activities on H 2 generation comparing with pure TiO 2 , TiO 2 /WO 3 and Pt/WO 3 /TiO 2 nanofibers. This greatpromotion is mainly on account of the photosynthetic heterojunction system, which include the surface plasmon resonance (SPR) of Au nanoparticles, low overpotential of Pt nanoparticles, and more importantly, the one-dimensional multichannel-improved charge-carrier photosynthetic heterojunction system with Pt as an electron collector and WO 3 as a hole collector. Transferring photoinduced electrons and holes at the same time, leading to effective charge separation was directly proved by ultraviolet photoelectron spectroscopy, electrochemical impedance spectroscopy, photocurrent analysis and incident photon-to-electron conversion spectrum.
研究领域:
材料科学
·
能源化学
·
环境科学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2016
·
IF 5.886
Tianran Lin,Yarong Wu,Zhihong Li,Zhiping Song,Liangqia Guo,Fengfu Fu
Colorimetric detection of biogenic amines, well-known indicators of food spoilage, plays an important role for monitoring of food safety. However, common colorimetric sensors for biogenic amines suffer from low color resolution or complicated design and intricate output for the end-users. Herein, we explored a simple but effective strategy for visual monitoring of biogenic amines with multiple color change based on hydrolysis-induced silver metallization reaction to tune the localized surface plasmon resonance (LSPR) adsorption of Au nanorods (NRs). The color change and blue shift of longitudinal LSPR peak of Au NRs were closely related to the concentration of biogenic amines. This strategy provided a simple, sensitive, robust, nondestructive, cost-effective, and user-friendly platform for in situ evaluating the freshness of foodstuffs.
研究领域:
食品安全
·
纳米技术
·
分析化学
✓ 已验证
DOI
高影响因子
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
·
2021
·Vol. 94
·期 10
·2402-2409
·
IF 5.488
Chen Jie,Hu Ruhui,Zhu Han,Wang Yindian,Mao Zhihui,Hu JunJie,Hu Xiaojun,Chen Hongxia
Molybdenum disulfide nanosheets (MoS2 NSs) show great promise in the field of optical biosensors due to its unique optical transparency and semiconducting properties. In this work, supramolecule calix[4]arene (pSC4) modified MoS2 NSs (pSC4-MoS2 NSs) was synthesized through a one-step preparation method. The strong p-π binding and electrostatic interactions between pSC4 and MoS2 NSs increased the stripping efficiency by preventing aggregation of nanosheets. Based on pSC4-MoS2 NSs, a simple and feasible surface plasmon resonance (SPR) sensor was proposed. SPR refractive index change experiments were conducted to evaluate the sensor’s sensitivity performance, and the three main parameters of sensitivity were improved. Benefiting from the modification of pSC4, proteins were captured with higher surface coverage through the host-guest recognition, which is identical to optimization analysis experiment. According to a bovine serum albumin antibody immune experiment, pSC4-MoS2 NSs based SPR sensors provided a new sensitive sensing interface with a 50.85% SPR signal increased compared that of MoS2 NSs modification. Therefore, supramolecule modified MoS2 NSs is promising for application to SPR immunosensing for the detection of cancer biomarkers.
研究领域:
材料科学
·
生物医学工程
·
光学传感器
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Ya-Nan Gao,Ye Wang,Tian-Ning Yue,Biao Zhao,Renchao Che,Ming Wang
Absorption-dominant electromagnetic shielding materials can effectively reduce secondary pollution in the shielding process, and have greater significance in practical applications. Herein, silver (Ag) micro-tubes with superstructure, which were fabricated via using poly(lactic acid) (PLA) fibers as templates, were used to achieve the composites with ultrahigh, lightweight, and absorption-dominant electromagnetic shielding performance. The Ag nanoparticles were firstly deposited on the surface of PLA fibers by chemical reduction. The Ag micro-tubes were obtained by etching the PLA fibers in the core. The Ag nanoparticles were stuck together to form the Ag micro-tubes by polymer chains. The ultrahigh electromagnetic interference (EMI) shielding effectiveness (SE) of ∼110 dB was found in the Ag micro-tubes composed with polydimethylsiloxane or PLA with 1.5 mm in thickness. Due to the micro-tube structure, the composites containing with Ag micro-tubes exhibited absorption dominant shielding mechanism and low density. The absorption coefficient (A) value could reach 0.79 in the composites with Ag micro-tubes. The ultrahigh EMI SE performance and absorption dominant shielding mechanism of the composites was ascribed to the superstructure of the Ag micro-tubes which could efficiently create surface plasmon resonance, electronic vibration, interfacial polarization, capacitance effect and conductive loss. The work provides a new idea for preparing ultrahigh electromagnetic shielding materials with high absorption and low density.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Chemical & Biomedical Imaging
·
2023
·
IF 0
Kai Zhou,Aosheng Chang,Xue Wang,Yingyan Jiang,Yongjie Wang,Xinchao Lu,Wei Wang
Here, we report a label-free optical relative refractive index (RI) sensing technique based on the image contrast of surface plasmon resonance microscopy (SPRM). The positive or negative contrast of a SPRM pattern reflects the relative RI of a nanosized object to the medium. Through directly imaging the relative RI, we classified two kinds of surface nanobubbles generated by varied pathways. The former type of nanobubbles nucleated from local oversaturation of gas molecules had a RI lower than that of water and a transient lifetime. The second type of nanobubbles formed by a methanol–water exchange process had a RI higher than that of water and a long lifetime. The relative RI of surface nanobubbles indicated that the gas state is sparse for transient nanobubbles and compressed inside the stable nanobubbles.
研究领域:
光学传感
·
纳米科学
✓ 已验证
DOI
Cell Reports Physical Science
·
2023
·
IF 8.9
Hao Li,Shengyang Wang,Jianbo Tang,Huichen Xie,Jiangping Ma,Haibo Chi,Can Li
The extremely short lifetime of plasmon-induced charges is a huge challenge to surface plasmon resonance photocatalytic water oxidation. Here, we report that increasing oxygen vacancies ( V O ) in Au/TiO 2-x can greatly enhance the external quantum efficiency of plasmon-induced water oxidation from 0.03% to 1.52% at 520 nm. The increased V O can achieve efficient transportation of plasmonic electrons in the conduction band of TiO 2-x with enhanced conductivity and can boost the oxygen evolution kinetics of Au/TiO 2-x . The dynamics of plasmonic electrons derived from interband transition reveal that holes in the d-band of Au nanoparticles (NPs) can transfer to the defect states near the valence band of TiO 2-x , which originate from V O at the interface of Au/TiO 2-x . This process could enrich holes at the interface, making it possible to collect multiple holes for water oxidation. The synchronous functions in hole capture and water molecule adsorption enable V O to be efficient catalytic sites for plasmon-induced water oxidation.
研究领域:
材料科学
·
光催化
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Jiaoping Si,Hongjing Liu,Wendong Zhang,Dengyu Jiao,Wangxing Ai,Yuerui Ma,Lihuan Feng,Xing’an Dong,Wenjie He,Peng Chen
The catalytic conversion of nitrogen oxides (NO x ) to non-toxic products has emerged as a critical strategy for air pollution control under stringent emission regulations. Photocatalytic NO x removal performance highly depends on the transmission of photogenerated electrons and the amount of reactive oxygen species (ROS) generated. Herein, the Bi/BiOCl/SrTiO 3 heterostructure photocatalyst was prepared by a simple in situ synthesis method to address the limitations of conventional NOx removal systems. Due to the synergistic effect of bismuth (Bi) surface plasmon resonance (SPR) and the built-in electric field in BiOCl/SrTiO 3 S-scheme heterojunction, Bi/BiOCl/SrTiO 3 showed strong light absorption ability and high charge separation efficiency, with the highest NO removal efficiency reaching 70 %. The enhanced electronic interaction between Bi and BiOCl/SrTiO 3 induced Bi-O covalent bonds with the BiOCl layer to facilitate fast charge separation, promoting the rapid transfer of interfacial photogenerated carriers, this process induces the activation of O 2 and H 2 O to form reactive oxygen species (ROS) to promote the oxidative removal of NO. This study provides new insights into the development of effective photocatalysts with fast charge separation by synergistic metal active sites and built-in electric field of heterojunction for air pollutant purification.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jiayue Zhou,Dongmei Li,Jie Nan,Nan Zhang,Hongwei Zhao,Huan Xia,Zhuxin Chang,Na Sai
Inspired by the desert beetle, a novel biomimetic chip was developed to detect chloramphenicol (CP). The chip was characterized by a periodic array in which hydrophobic Au nanoparticles (AuNPs) were semi-embedded on hydrophilic polymethyl methacrylate (PMMA) spheres. Among them, the AuNPs exhibited both a localized surface plasmon resonance effect to amplify the reflected signal and a synergistic effect with PMMA spheres to create a significant hydrophilic-hydrophobic interface, which facilitated the enrichment of target CP molecules and improved sensitivity. After optimization, the chip showed direct, ultrasensitive (as low as 0.2 ng/mL), fast (5 min), and selective detection of CP with a wide concentration range extending from 0.2 ng/mL to 1000 ng/mL. During detection, color changes of the chip were observed by naked eyes without any color display equipment. The recovery of CP was between 94.65 % and 108.70 % in chicken and milk samples.
研究领域:
食品科学
·
纳米技术
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS EXPRESS
·
2024
·Vol. 32
·期 19
·33330-33343
·
IF 3.2
Zhibing Zhang,Zhiyong Yin,Shuguang Li,Linchuan Hu
To achieve more accurate analysis and detection of changes in liquid parameters, we propose a dual-parameter surface plasmon resonance (SPR) sensor that can measure refractive index (RI) and pH simultaneously. In this paper, we compare and analyze the transmission spectrum when the SPR effect is excited by the cladding mode of a photonic crystal fiber (PCF) and the core mode of the no-core fiber. The results show that the SPR effect excited using the cladding mode is stronger and the sensor has better loss peaks, which is more conducive to realizing the detection of the external environment. Therefore, the sensor uses PCF as the substrate and utilizes a cascade composite film structure, and the area where a silver film is deposited on the surface of the PCF is selected as the RI sensing area. Another part of the PCF, after the silver film is deposited, uses a high-sensitivity polyacrylic acid/chitosan self-assembled nanofilm as the pH-sensitive film. Experimental results show that the maximum sensitivity is 4122.44 nm/RIU and -57.82 nm/pH when the RI range is between 1.333 and 1.385 and the pH range is between 3.11 and 8.63, respectively. In addition, we experimentally verified that the sensor had good stability and repeatability. The design of the sensor provides new possibilities for real-time monitoring and precise control, helping to advance scientific research and the development of industry.
研究领域:
光学传感
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Lei Wu,Ruiting Xue,Sujing Zou,Xiqiang Mao,Jun Li,Yang Li,Jian Yang,Ximei Fan
Plasmonic/semiconductor heterojunctions have shown remarkable potential for advancing photochemical reactions, yet the reliance on noble metals in conventional plasmonic systems imposes prohibitive costs for solar-driven applications. Herein, we report the plasmonic semiconductor (WO 3 -OV) with full spectral response by pre-irradiation for the first time. The near-infrared light effectively excites the surface plasmon resonance (SPR) of WO 3 -OV, generating high-energy hot electrons capable of multi-electron transfer processes. Coupling WO 3 -OV with a band-matched semiconductor (TiO 2 ) establishes an internal electric field (IEF) at the heterointerface, which synergistically enhances charge separation and prolongs carrier lifetimes. Crucially, oxygen vacancies (OVs) in WO₃-OV serve dual roles: (1) as plasmonic centers for NIR photon harvesting and (2) as catalytic active sites for toluene oxidation. The synergistic effect of heterojunction and plasmonic was elucidated through comprehensive in situ characterization and theoretical calculation. The rational integration of LSPR, defect engineering, and interfacial charge control provides a universal framework for designing high-efficiency photocatalytic systems for environmental remediation and energy conversion.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 28
·2401180
·
IF 8
Rongsheng Hu,Shaowei Lin,Fajun Li,Jiaqing Shen,Yinong Xie,Baichang Deng,Youyu Zhang,Zhaogang Dong,Jinfeng Zhu
Exosomes are critical tumor biomarkers, which can be detected by label-free sensing of plasmonic metasurfaces with expensive antibody functionalization. Due to their low cost and small size, aptamers should be promising to replace antibodies in plasmonic metasensing of exosomes. However, research on aptamer-based plasmonic metasensing of exosomes is still unexplored. Here, the optical near-field sensing mechanism of aptamer-based plasmonic metasurface (APM) is investigated. Based on the study of the evanescent field of APM, using thiol-modified aptamer boosts the utilization rate of resonance wavelength shift from 27.5% to 83.3% compared to biotinylated aptamers, attributed to a significant reduction in the near-field occupation of the biofunction layer. Moreover, APM biosensors effectively detect clinical serum exosomes for breast cancer (BC) diagnosis and classification. The receiver operating characteristic analysis shows an area under the curve of 99.3% for APM diagnosis, surpassing the 79.1% for hematological tests of the conventional BC biomarker CA153. The results also indicate that APM biosensors can be a noninvasive tool for molecular classification of BC with great distinguishment of P < 0.0001. The research demonstrates that APM biosensors are enabling a reliable and convenient platform to facilitate clinical hematological tests of exosomes for auxiliary diagnosis of cancer.
研究领域:
生物医学工程
·
癌症诊断
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2024
·
IF 3.3
Hao Lv,Bingrong Shi,Yining Zhang,Jun Guo,Yao Meng,Xia Wang
Photonic crystals (PCs) are artificial structures with different dielectric constants that are arranged periodically in space and can control the propagation of electromagnetic waves of specific frequencies. The photonic bandgap can tune the photon state density, which is beneficial for the generation of random lasers (RLs). In this paper, a thin film of PMMA-doped DCJTB is spun-coated on a silicon dioxide (SiO 2 )PC to produce an RL. The PC is fabricated by a convenient dip-coating method with variable PBGs by changing the diameter of SiO 2 nanospheres . By changing the position of the PBG gap, the RL emission peak can be effectively manipulated with an emission wavelength of up to 16 nm. By adding Au nanoparticles , the lasing performance is improved due to the surface plasmon resonance effect and strong photon scattering , where the emission intensity is increased by 191.9 %, and the threshold is decreased by 37.8 %. The imaging results show that the RL has low spatial coherence, which has a good application in speckle-free imaging. This study provides an effective method to produce a low threshold, high-quality RL with convenient manipulation of lasing properties , which opens the door for expanding its application in optoelectronic devices and speckle-free imaging.
研究领域:
光学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）