Article
Optics
Hongwen Cao, Zhen Sun, Liting Guo, Na Li, Zubin Shang, Anqi Zhang, Lipeng Cao, Tifeng Jiao, Mingli Wang
Summary: This study prepared a low-cost, environmentally friendly and stable surface enhanced fluorescence substrate, Ag@razor clam (Ag@RC), via magnetron sputtering technique. The Ag-10 substrate showed optimal fluorescence enhancement, with a maximum enhancement factor of 1574 for rhodamine 6G and excellent stability and repeatability. Simulation using 3D FDTD method was used to investigate the electric field distribution and fluorescence enhancement effect of Ag-10 substrate.
OPTICS COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Jiafeng Shi, Zhongshuai Xie, Xiaolong Tang, Yaojin Wang, Guoliang Yuan, Jun-Ming Liu
Summary: The coupling of piezoelectric and plasmonic effects has been proven to enhance the photocatalytic performances. In this study, a new piezoelectric composite composed of Na0.5Bi0.5TiO3 nanoplates coated with Ag particles was prepared, showing excellent piezo-photocatalytic performances. The plasmonic effect of Ag nanoparticles widened the catalysts' spectral absorption range, and the electric field from the deformation of Na0.5Bi0.5TiO3 piezoelectric nanoplates greatly enhanced the separation and migration efficiencies of photo-generated charge carriers in Ag@ Na0.5Bi0.5TiO3 composites. With simultaneous full-spectrum lights and ultrasonic excitation, the piezo-photocatalytic activity of Ag@ Na0.5Bi0.5TiO3 achieved a significant degradation rate of 98.8% RhB in just 30 minutes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Dingyu Song, Tianxing Wang, Lin Zhuang
Summary: Surface-enhanced Raman scattering (SERS) technology is important in spectroscopy. The combination of spin-coating, surface modification, and in situ reduction methods was used to prepare a photonic crystal array of SiO2@Au core-shell nanoparticles as a SERS substrate (SiO2@Au NP array). Compared to a Au-SiO2 NP array prepared using doping methods, the SiO2@Au NP array showed better SERS properties and reproducibility. The approach provides a new option for SERS substrate preparation and has potential applications in trace contaminant detection and nondestructive testing.
Article
Nanoscience & Nanotechnology
Ruei-Nan Wu, Chia-Chun Ni, Shaobo Yang, Yang Kuo, Wen-Yen Chang, Yu-Cheng Su, Sheng-Yang Kuo, C. C. Yang
Summary: This study investigates the SP coupling effects under different conditions by overlaying chemically synthesized Ag NPs on InGaN/GaN QW templates and controlling the deformation of Ag NPs. The results indicate that the geometric shape of the contact interface plays a significant role in controlling the SP coupling spectrum and strength.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Coatings & Films
Ningning Zhou, Guowen Meng, Zhulin Huang, Xiang Zhang, Chuhong Zhu, Yan Ke
Summary: A novel SERS substrate was fabricated with Ag-coated three-dimensional Cu(OH)(2) nanowire arrays, offering a highly sensitive platform for detecting adsorbates with a detection limit down to 0.1 pM. This substrate showed promising applications in detecting pesticide residues and organic pollutants with reliable signal enhancement.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Chih-Chiang Wang, Pao-Tai Lin, Fuh-Sheng Shieu, Han-Chang Shih
Summary: Bi2Se3 nanoplatelets were synthesized with Ag deposition on Al2O3(100) substrates, resulting in enhanced photocurrent and photosensitivity under UV and visible light. This enhancement is attributed to narrow bandgap of Bi2Se3, Schottky field at Ag-Bi2Se3 interface, surface plasmon resonance from Ag, and highly conductive surface from Ag-Bi2Se3.
Review
Chemistry, Multidisciplinary
Andrew J. Bagnall, Sagar Ganguli, Alina Sekretareva
Summary: This review focuses on the mechanisms behind photocurrents observed in plasmon-enhanced electrocatalysis (PEEC) and critically evaluates alternative sources of current enhancement. Guidelines for experimentalists to distinguish between different enhancement mechanisms in PEEC are presented.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Optics
Huiju Cao, Zubin Shang, Hongwen Cao, Yanxue Hou, Yunfan Yang, Zhen Sun, Tifeng Jiao, Mingli Wang
Summary: This study proposes an efficient and low-cost biological SEF substrate for the trace detection of melamine in milk. The substrate modifies metal nanomaterials on the surface of lotus leaf, forming nanoparticles that exhibit a good local surface plasmon resonance (LSPR) effect. The substrate enhances the fluorescence intensity of probe molecules by generating high-density hot spots, and achieves a low detection limit for melamine in milk samples. The study provides a new strategy for the design and construction of SEF substrates, with potential applications in detecting harmful substances in real environments.
Article
Polymer Science
Jun Kim, Naseem Abbas, Seongmin Lee, Jeongwoo Yeom, Md Ali Asgar, Mohsin Ali Badshah, Xun Lu, Young Kyu Kim, Seok-Min Kim
Summary: This study proposes a simple and cost-effective method for fabricating metal-enhanced fluorescence substrates using plasmonic nanoantenna arrays. By depositing a silver layer on a nanoimprinted nanodot array, a PNAA is formed with controlled Ag thickness to adjust its geometrical properties. Experimental results confirm the simulated data showing enhanced fluorescence signals.
Article
Chemistry, Analytical
Pengfei Zhang, Rui Wang, Zijian Wan, Xinyu Zhou, Guangzhong Ma, Jayeeta Kolay, Jiapei Jiang, Shaopeng Wang
Summary: The article introduces a total internal reflection-based evanescent scattering microscopy technique that can detect single proteins without labeling and provides a high-precision measurement method for protein binding kinetics.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Ying-Chu Chen, Ying-Zhen Chen, Chih-Ming Wang, Yu-Kuei Hsu
Summary: In this study, Ag electrode was anodically etched to generate Ag nanocorals (NCs) consisting of closely interconnected Ag nanoparticles (NPs) with coordinately unsaturated Ag atoms at the grain boundaries. Electrokinetic studies showed that these under-coordinated Ag atoms stabilized the hydrogen intermediates on Ag NCs and facilitated the transfer of hot electrons generated by the relaxation of localized surface plasmon resonance (LSPR) under visible and near-infrared (NIR) light illumination. As a result, the hydrogen evolution reaction (HER) over Ag NCs was significantly accelerated, achieving a cathodic current density of 10 mA cm-2 at an early overpotential of h = 156 mV compared to other Ag-based electrocatalysts reported in the literature. This outstanding performance highlights the great potential of Ag NCs as an alternative photoelectrocatalyst, taking advantage of incident light for enhanced HER, in solar fuel production compared to state-of-the-art Pt electrocatalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Analytical
Bin Zhang, Xiaoming Wang, Wei Hu, Yiquan Liao, Yichang He, Bohua Dong, Minggang Zhao, Ye Ma
Summary: This work presents a photo-responsive Au@Fe3O4 nanozyme with excellent peroxidase-like activity based on gold nanoparticles (Au NPs). The hot electrons of Au NPs excited by a surface plasmon resonance (SPR) effect enhance the catalytic activity of Au@Fe3O4 in oxidizing 3,3′,5,5′-tetramethylbenzidine (TMB) and detecting hydroquinone (HQ). The magnetic separation and reusability of the nanozyme further contribute to its cost-effectiveness. The sensor exhibits a detection linear range of 0-30 μM and a lowest detection limit of 0.29 μM. Good recovery rates are achieved in the detection of real water samples, providing promising references for the development of HQ detection technology in seawater.
Article
Chemistry, Multidisciplinary
Chadrasekhar Loka, Kee-Sun Lee
Summary: Ag-Ag2O-ZnO nanocomposite with localized surface plasmon resonance (LSPR) and p-n heterojunction structure was synthesized by hydrothermal process, which effectively improved the photocatalytic efficiency and suppressed the recombination of photogenerated electron-hole pairs. The nanocomposite exhibited excellent photocatalytic activity and achieved high degradation efficiency for different dyes under visible-light irradiation.
Article
Chemistry, Physical
Xingming Ning, Dan Yin, Yiping Fan, Qi Zhang, Peiyao Du, Dongxu Zhang, Jing Chen, Xiaoquan Lu
Summary: Coating photoanodes with transition-metal hydroxides (TMH) is a promising approach for improving photoelectrochemical (PEC) water oxidation. Effective charge separation and enhanced surface catalysis dynamics are achieved through decoration of plasmon metal (Ag) in a semiconductor/TMH coupling system for PEC water splitting. The study provides a guiding design method for solar energy conversion with the semiconductor-TMH system, demonstrating the universality of the approach.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Po-Ting Chen, Ming-Wei Liao, Tsong-Pyng Perng
Summary: Polystyrene nanospheres were used as a template to form hexagonal close-packed Ta2O5 nanohoneycombs, and then Au nanoparticle arrays of different sizes were deposited on them to enhance surface plasmon resonance and visible-light photocatalytic hydrogen evolution. FDTD simulation showed that the 100-nm Ta2O5 nanohoneycombs with smaller Au nanoparticles exhibited more effective localized surface plasmon resonance effect. The photocatalytic hydrogen evolution results were consistent with the simulation and tests, and the concept of effective yield ratio was proposed to explain the effects of Au nanoparticle size and spacing on hydrogen evolution efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Biophysics
Jingrong Xiong, Chen Dong, Jingjing Zhang, Xinyue Fang, Jie Ni, Hongyu Gan, Jinxiang Li, Chunyuan Song
Summary: A ratiometric surface-enhanced Raman spectroscopy-based strategy was proposed to detect extremely rare circulating tumor cells (CTCs) in a sensitive and nondestructive manner. The method utilizes the assembly of plasmonic nanostructures and DNA walkers triggered by CTCs, enabling reliable detection through stable ratiometric SERS signals.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Jinxiang Li, Yugang Yuan, Hongyu Gan, Chen Dong, Bin Cao, Jin-liang Ni, Xueliang Li, Wenjie Gu, Chunyuan Song, Lianhui Wang
Summary: This study proposes a novel nanobiointerface that integrates specific nanomaterials and DNA probes for the efficient capture, sensitive detection, and non-destructive release of circulating tumor cells (CTCs). The experimental results demonstrate that this nanobiointerface has great potential for testing and analyzing CTCs in blood.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Chen Dong, Xinyue Fang, Jingrong Xiong, Jingjing Zhang, Hongyu Gan, Chunyuan Song, Lianhui Wang
Summary: A highly sensitive and specific surface-enhanced Raman scattering (SERS) strategy was proposed to simultaneously image dual homodimerizations of membrane proteins on single live cells. Networking of AuNPs-based dual-recognition probes (dual-RPs) and SERS tags via proximity ligation-assisted catalytic hairpin assembly (CHA) was used to enhance the SERS effect. This strategy provides a good method for high-sensitivity monitoring of membrane proteins dimerizations-based multiple intercellular signal transductions in a natural and complex cellular microenvironment.
Article
Chemistry, Analytical
Chen Dong, Jingrong Xiong, Jie Ni, Xinyue Fang, Jingjing Zhang, Dan Zhu, Lixing Weng, Yewei Zhang, Chunyuan Song, Lianhui Wang
Summary: The development of theranostic nanosystems integrating cascaded SERS imaging and gene silencing therapy for accurate cancer diagnosis and treatment is a challenge, but rarely reported. In this study, a novel Au nanoparticles-based theranostic nanosystem was proposed for highly sensitive and specific cancer diagnosis and treatment through cascaded SERS imaging and DNAzyme-based dual gene silencing therapy. The system utilized specially designed Y-motifs and dsDNA linkers to identify intracellular cancer-related miRNAs and trigger DNAzymes for dual gene silencing therapy of cancer cells.
ANALYTICAL CHEMISTRY
(2022)
Article
Ophthalmology
Weizhou Yang, Chunyuan Song, Meng Gao, Shuna Wang, Haonan Yu, Yan Li
Summary: This study used OCTA to analyze the relationship between smoking and dry AMD. The results showed that SCP, DCP, and FRT were sensitive indicators for early and intermediate dry AMD, and DCP could reflect the effects of smoking on the retina.
Article
Biophysics
Hemeng Pan, Yan Dong, Lingbo Gong, Jiayun Zhai, Chunyuan Song, Zhilei Ge, Yan Su, Dun Zhu, Jie Chao, Shao Su, Lianhui Wang, Ying Wan, Chunhai Fan
Summary: In this study, a sensitive and straightforward SERS aptasensor was developed to detect exosomes using gold nanostars-decorated MoS2 nanocomposites as the SERS substrate. The aptasensor exhibited the ability to specifically recognize exosomes through the assembly of ROX-labeled aptamers on the surface of the nanocomposites, resulting in a decrease of the SERS signal.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Biophysics
Jingjing Zhang, Xiaping Miao, Chunyuan Song, Na Chen, Jingrong Xiong, Hongyu Gan, Jie Ni, Yunfeng Zhu, Kaiting Cheng, Lianhui Wang
Summary: A novel ultra-sensitive surface-enhanced Raman spectroscopy (SERS) sensor has been developed for rapid and reliable detection of SARS-CoV-2 RNA. The sensor utilizes non-enzymatic signal amplification and has high sensitivity and selectivity, making it a valuable tool for early detection and efficient prevention and control of COVID-19.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Biophysics
Jingjing Zhang, Chunyuan Song, Yunfeng Zhu, Hongyu Gan, Xinyue Fang, Qian Peng, Jingrong Xiong, Chen Dong, Caiqin Han, Lianhui Wang
Summary: In this study, a novel one-pot cascade signal amplification strategy integrating the CRISPR/Cas13a system and branched hybridization chain reaction (bHCR) was proposed for highly sensitive and specific SERS assay of disease-related nucleic acids. The method showed low detection limit, good linear calibration curve, and demonstrated good practicality in clinical samples.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Engineering, Mechanical
Jianbin Wang, Chunyuan Song, Dafu Zhang, Dadi Li, Sheng Qu
Summary: This paper proposes a fast and stable iterative algorithm for wheel-rail contact geometry based on constraint equations. It can be implemented in dynamic wear simulations that require real-time profile updating. The critical factors that determine convergence and iteration stability are analyzed. A B-spline is adopted for wheel-rail profile modeling, and it is found that the smoothness of the derivative curves significantly affects the numerical stability.
JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS
(2023)
Article
Chemistry, Multidisciplinary
Huijuan Zhao, Xinyi Cao, Qiao Dong, Chunyuan Song, Lianhui Wang, Li Gao
Summary: Quasi-BIC resonances are reported in large-area silicon photonic crystal slabs formed by soft nanoimprinting lithography and reactive ion etching. These resonances are extremely tolerant to fabrication imperfections and can be characterized using simple transmission measurements. By introducing dimensional changes during the etching process, the resonances can be tuned over a wide range. The low-cost fabrication and easy characterization process make these devices suitable for future optical sensing applications.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Analytical
Chen Dong, Xinyue Fang, Xingcai Qin, Yeran Wang, Jingjing Zhang, Chunyuan Song, Lianhui Wang
Summary: This study developed a smartphone-based colorimetric detection method for Met dimerization on live cells, enabling high-sensitivity sensing of the HGF/Met signaling pathway. Met monomers on live cells were recognized by specific ligands, triggering a catalytic reaction to generate G-quadruplex fragments, which could further combine with hemin to form DNAzymes with catalytic activity. These DNAzymes produced a colorimetric signal upon catalyzing the oxidation of ABTS. The colorimetric assay was achieved through image acquisition and processing on a smartphone. The proposed method demonstrated a wide linear working range and low detection limit, making it suitable for point-of-care testing of Met-dimerization-related tumor cells.
ANALYTICAL CHEMISTRY
(2023)
Article
Optics
Chunyuan Song, Jingjing Gao, Yu Gan, Xuyu Zhang, Shensheng Han, Lihong Wang, Honglin Liu
Summary: In this study, a new method based on possible path sampling with corresponding weights and coherent superposition is proposed for simulating optical field propagation and speckle patterns in scattering media. It can be used for sophisticated studies on the influences of medium parameters, motion of scatterers, sample distortions, and morphological appearances. Additionally, it has potential for micro-examination of optical fields in scattering media and may inspire new methods and techniques for non-invasive precision detection and diagnosis of scattering media.
Article
Optics
Xuyu Zhang, Jingjing Gao, Yu Gan, Chunyuan Song, Dawei Zhang, Songlin Zhuang, Shensheng Han, Puxiang Lai, Honglin Liu
Summary: A communication channel is necessary for information transmission. By replacing the lens with a thin scattering medium, the image can still be extracted, indicating that the scattering medium retains information transmission channels. Through deep learning, it is found that a scattering medium can construct different channels to match source coding manners. Valid channels are essential for transmitting information through a spatial shift-invariant system.
Article
Biophysics
Jinxiang Li, Chen Dong, Hongyu Gan, Xinyue Gu, Jingjing Zhang, Yunfeng Zhu, Jingrong Xiong, Chunyuan Song, Lianhui Wang
Summary: A novel strategy for nondestructive separation/enrichment and ultra-sensitive SERS-based enumeration of CTCs is proposed using aptamer recognition and RCA. The strategy involves the use of magnetic beads modified with aptamer-primer probes for specific capture of CTCs, followed by magnetic separation/enrichment, RCA-powered SERS counting, and nondestructive release of CTCs. The method shows good potential for detecting CTCs in blood and allows for their subsequent analysis.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
Jinxiang Li, Yugang Yuan, Hongyu Gan, Chen Dong, Bin Cao, Jin-liang Ni, Xueliang Li, Wenjie Gu, Chunyuan Song, Lianhui Wang
Summary: In this study, a novel nanobiointerface integrating silver nanorods and double-tetrahedral DNA probes was proposed for the capture, detection, and release of circulating tumor cells (CTCs) with high efficiency, demonstrating great potential for reliable CTC analyses in clinical applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)