Article
Nanoscience & Nanotechnology
Yimin Fan, Tao Zhang, Zubo Cai, Dongxian Li, Weisheng Yue, Tiancheng Gong, Yunfei Luo, Ping Gao
Summary: Arrays of gold-silver bimetallic nanopillars were fabricated using surface-plasmon lithography and their enhancement properties as surface-enhanced Raman scattering substrates were studied. The nanopillars showed a good response in the detection of methylene blue molecules at a low concentration. The Au-Ag bimetallic coating exhibited higher SERS enhancement compared to pure Au or Ag coatings. This study demonstrates the potential of the fabricated SERS substrates for detecting biochemical molecules at trace levels, and surface-plasmon lithography as a promising method for fabricating SERS substrates.
Article
Chemistry, Multidisciplinary
Hung Ji Huang, Ming-Hua Shiao, Yang-Wei Lin, Bei-Ju Lin, James Su, Yung-Sheng Lin, Han-Wei Chang
Summary: The study evaluated the effects of Au cores in Ag shells on enhancing surface-enhanced Raman scattering (SERS) with samples of different Au/Ag ratios. The synthesized Au@Ag-DNFs/Si samples showed that the Au core played a role in focusing the illumination light and enhancing the SERS response of the Ag coverage.
Article
Spectroscopy
Tania Mahata, Gour Mohan Das, Venkata Ramanaiah Dantham
Summary: The study focuses on the synthesis of Au-Ag bimetallic nanostructures and their application in surface enhanced Raman scattering (SERS). By synthesizing nanostructures and loading Raman probes, it is found that nanostructures with sharp sprouts have a more significant SERS effect on 1 pM concentration solutions.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Analytical
Di Liu, Huimin Gao, Wenji Jiang, Su Yan, Hao Liu, Junjie Chen, Sisi Wen, Wei Zhang, Xu Wang, Bing Zhao, Wei Song
Summary: In this study, three-dimensional Ag aerogel-supported Hg single-atom catalysts were used as an efficient SERS substrate for monitoring enhanced oxidase-like reactions. The effect of Hg2+ concentrations on the SERS properties of 3D Hg/Ag aerogel networks was investigated, and an optimized addition of Hg2+ resulted in specific enhancement. The formation of Ag-supported Hg SACs was confirmed using HAADF-STEM imaging and XPS measurement, and the oxidase-like catalytic mechanism of Hg/Ag SACs was revealed using DFT. This research provides a mild synthetic strategy for fabricating Ag aerogel-supported Hg single atoms with promising prospects in various catalytic fields.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yilin Wen, Lu Chen, Feng Leng, Zhangyou Yang, Chao Yu
Summary: Researchers successfully synthesized multifunctional nanoplatforms TPCs by combining Au-Ag cages with mitochondrial-targeting molecules, achieving triple antitumor treatment using self-augmented photothermal therapy (PTT) and photodynamic therapy (PDT). TPCs showed higher photothermal conversion efficiency and enhanced PDT treatment effects under laser irradiation.
JOURNAL OF NANOSTRUCTURE IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Sungwoo Lee, Insub Jung, Soohyun Lee, Jaewon Lee, Myeong Jin Oh, Minsun Park, MohammadNavid Haddadnezhad, Woocheol Park, Sungho Park
Summary: We developed a highly sensitive and reliable immunoassay based on surface enhanced Raman scattering (SERS) using bimetallic alloy Ag@Au hollow dual-rim nanorings (DRNs). The Ag@Au hollow DRNs, consisting of concentrically overlapped hollow nanorings with different diameters connected by thin metal ligaments, exhibited strong single-particle SERS activity and biocompatibility. By using Ag@Au hollow DRNs as nanoprobes, a low limit of detection of 10 pM for human chorionic gonadotropin (HCG) hormone was achieved, highlighting their potential as ultrasensitive SERS nanoprobes.
NANOSCALE HORIZONS
(2023)
Article
Chemistry, Analytical
Ruipeng Chen, Yunfeng Sun, Bingyang Huo, Zefeng Mao, Xiaojuan Wang, Shiyu Li, Ran Lu, Shuang Li, Jun Liang, Zhixian Gao
Summary: A universal surface-enhanced Raman scattering (SERS) aptasensor was developed for the detection of Zearalenone (ZEN) with a linear detection range from 0.005 to 500 ng mL(-1) and a detection limit of 0.001 ng mL(-1). The sensor showed excellent performance for analytical applications with real-world samples.
ANALYTICA CHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Jie Huang, Tianxiang Zhou, Wenshi Zhao, Min Zhang, Zhibo Zhang, Wangsheng Lai, Naveen Reddy Kadasala, Huilian Liu, Yang Liu
Summary: In this study, magnetic core-shell-satellite nanocomposites were successfully prepared and applied for ultra-sensitive surface-enhanced resonance Raman scattering (SERRS) detection of bisphenol A (BPA). The nanocomposites exhibited outstanding SERRS sensitivity and saturation magnetization, providing a new idea for the tailored design of ultra-sensitive SERRS substrates. It shows great potential in pollutant detection, environmental monitoring, and food safety.
Article
Chemistry, Analytical
Chuhong Zhu, Qiangsheng Zhao, Xiujuan Wang, Zhongbo Li, Xiaoye Hu
Summary: In this study, a functional SERS system was developed for sensitive detection of target analytes using concentration of analyte molecules on or nearby plasmonic nanostructures. The composite film of Ag-nanocubes/graphene-oxide/Au-nanoparticles on a hydrophobic surface effectively accumulated analyte molecules for enhanced SERS activity. The system showed promising applications in food safety inspection and environmental pollutant monitoring.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Sen Li, Defu He, Shuning Li, Ruipeng Chen, Yuan Peng, Shuang Li, Dianpeng Han, Yu Wang, Kang Qin, Shuyue Ren, Ping Chen, Zhixian Gao
Summary: In this study, a novel aptamer sensor based on magnetic separation and surface-enhanced Raman scattering (SERS) was proposed for the sensitive and specific detection of trace BPA. The sensor showed high sensitivity and specificity through the pairing of the BPA aptamer and DNA. The proposed aptasensor is a promising biosensing platform for BPA detection.
Article
Biotechnology & Applied Microbiology
Ji Xia, Gao-Yang Chen, You You Li, Lu Chen, Dan Lu
Summary: In this paper, a SERS platform based on surface enhanced Raman scattering technology was proposed for quantitative detection of superoxide dismutase in the serum of cervical cancer patients. The platform demonstrated excellent uniformity, selectivity, and reproducibility. It achieved accurate and quantitative detection of SOD concentration in human serum within 20 minutes with a limit of quantitation of 10 U mL(-1). Furthermore, the platform showed consistent results with ELISA in testing serum samples from cervical cancer, cervical intraepithelial neoplasia, and healthy individuals, suggesting its potential as a tool for early clinical screening of cervical cancer in the future.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Bei Liu, Mochamad Januar, Jui-Ching Cheng, Koji Hatanaka, Hiroaki Misawa, Kou-Chen Liu
Summary: The article discusses the importance of matching the resonant wavelength of plasmonic nanoparticles with the emission band of organic materials for optimal plasmon-enhanced luminescence in OLEDs. It introduces a design strategy using AuxAg1-x alloy NPs to enable resonance tuning while preserving NP size. Bimetallic NPs, especially with x < 0.6, provide additional degrees of freedom for plasmon wavelength variation and offer benefits of higher scattering and more intense electric fields compared to monometallic NPs.
Article
Biochemical Research Methods
Wendai Cheng, Ping Tang, Xuanmeng He, Xinyue Xing, Shengde Liu, Feng Zhang, Xiaoxu Lu, Liyun Zhong
Summary: The synthesized Au/Ag composite-based SERS nanoprobe showed significant advantages in sensitivity and response speed for quantitative characterization of Cr3+ content. This nanoprobe might offer a new strategy for dynamic monitoring of Cr3+ content in human metabolism.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Jun Dong, Wanting Zhou, Chengyuan Yang, Haoran Wu, Qingyan Han, Chengyun Zhang, Wei Gao, Xuewen Yan, Mengtao Sun
Summary: The absorption and scattering frequencies of surface plasmon resonance can be adjusted by changing the morphology, size, structure, arrangement, and gap between noble metal nanoparticles. This enhances the local electromagnetic field on the substrate surface, promoting surface-enhanced Raman spectroscopy.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Brinton King Eldridge, Saghar Gomrok, James W. Barr, Elise Anne Chaffin, Lauren Fielding, Christian Sachs, Katie Stickels, Paiton Williams, Yongmei Wang
Summary: Gap-enhanced Raman tags are a new type of optical probe that utilize the strong electric field inside the gap between two plasmonic metals to enhance the surface-enhanced Raman scattering response. Our study investigated Au@SiO22@Au nanoparticles with varying shell and gap thicknesses and found that the near-field enhancement spectra inside the gap were stronger than on the outer surface of the nanoparticle. We also discovered that a thin shell combined with a thin gap produced the greatest near-field enhancement.
Article
Optics
Haichao Yu, Feng Tang, Jingjun Wu, Zao Yi, Xin Ye, Yiqun Wang
Summary: The study investigates a metasurface-based reflective deflector composed of silicon nanohole arrays to address the complexity and cost issues in intense-light systems caused by traditional optical components. By confining the strongest electric field in the air zone, the optothermal effect that causes laser damage is attenuated, improving the anti-damage property of the reflective metasurfaces. Designed deflectors based on these nanoholes show high reflectance and can theoretically handle a maximum laser density of 0.24 W/mu m(2), providing a promising approach for applications in laser scalpels, laser cutting devices, etc.
Article
Optics
Feng Tang, Qingzhi Li, Haichao Yu, Zao Yi, Xin Ye
Summary: This study investigates and compares the optothermal absorption in metalenses made of silicon nanobricks and nanoholes. The results demonstrate that the distribution of electric field in the absorbent materials and the enhancement of localized field are the key effects that lead to optothermal absorption. The study provides an approach to improve the anti-damage potentials of transmissive metalenses for intense-light systems.
Article
Materials Science, Multidisciplinary
Cai Zhang, Yongheng Chen, Hua Yang, Shifa Wang, Feng Qin, Li Liu, Zao Yi, Jianguo Zhang, Chao Liu, Pinghui Wu
Summary: We designed a broadband absorber based on gallium arsenide and titanium, which achieved over 90% absorption efficiency in the infrared range and maintained good absorption under various incident angles. This absorber is expected to find wide applications in infrared detection, optical sensing, and thermal electronics.
Article
Materials Science, Multidisciplinary
Hongyu Ren, Qianyi Shangguan, Zijun Song, Yong Zhao, Zao Yi, Guolu Ma, Jianguo Zhang, Hua Yang, Shifa Wang, Pinghui Wu
Summary: This paper presents a graphene metamaterial absorber based on impedance matching, which achieves a theoretically perfect absorption in the mid-infrared band. The designed absorber is capable of multiband stable high absorption and maintains excellent performance in a wide incident angle range. The results indicate that the graphene absorber has potential applications in biosensing, photodetection, and photocell fields.
Article
Materials Science, Multidisciplinary
Zijun Song, Guolu Ma, Zao Yi, Jianguo Zhang, Yong Zhao
Summary: Metamaterials are artificial materials with special properties that can acquire unique electromagnetic field properties due to its unique geometry and small size. The designed solar absorber can absorb over 90% of the electromagnetic waves in a wide range of wavelengths, and it performs well under different incident angles.
Article
Chemistry, Analytical
Qianyi Shangguan, Zihao Chen, Hua Yang, Shubo Cheng, Wenxing Yang, Zao Yi, Xianwen Wu, Shifa Wang, Yougen Yi, Pinghui Wu
Summary: The paper proposes an ultra-narrow band graphene refractive index sensor with high absorption efficiency, adjustability, and sensitivity, which can be applied to photon detection in the terahertz band and biochemical sensing.
Article
Optics
Zhenhua Lei, Yubin Zhang, Qingzhi Li, Ting Shao, Laixi Sun, Kaixuan Wang, Zao Yi, Xin Ye, Wanguo Zheng, Pinghui Wu
Summary: This study investigates the laser-induced thermal damage on the surface of a single crystal silicon mirror illuminated by a mid-infrared intense laser. By using mid-infrared quasi-continuous wave lasers, the researchers obtained the transient temperature field and thermal stress field under different laser fluxes. The simulation results show the calculation of thermal stress and temperature under laser irradiation, as well as the prediction of the irradiance that causes cracking and melting. The experimental results correlate well with the simulation results, providing insights into the thermal damage to the surface of silicon wafers caused by continuous mid-infrared laser irradiation.
Article
Chemistry, Analytical
Hao Chen, Wei Li, Shimin Zhu, Aiqiang Hou, Tao Liu, Jiangshan Xu, Xiaowei Zhang, Zao Yi, Yougen Yi, Bo Dai
Summary: In this study, the heat transfer performance of aeronautical materials at high temperatures was investigated using a quartz lamp to irradiate fused quartz ceramic materials. The surface temperature and heat flux distribution of the samples were measured, and the heat transfer properties of the materials were analyzed using a finite element method. The results showed that the fiber skeleton structure significantly affected the thermal insulation performance of the fiber-reinforced fused quartz ceramics, and the longitudinal heat transfer along the rod fiber skeleton was slower. The research provides important theoretical guidance for the heat insulation design of ultra-high acoustic velocity aircraft.
Article
Chemistry, Analytical
Fuyan Wu, Pengcheng Shi, Zao Yi, Hailiang Li, Yougen Yi
Summary: In this study, a solar absorber was created by superimposing three periodic Ti-Al2O3-Ti discs on a W-Ti-Al2O3 composite film structure. The physical process of achieving broadband absorption was investigated using the finite difference in time domain (FDTD) method. The results demonstrated that the absorber achieved an average absorption efficiency ranging from 95.8% to 96% over a wavelength range of 200 to 3100 nm.
Article
Chemistry, Analytical
Runing Lai, Pengcheng Shi, Zao Yi, Hailiang Li, Yougen Yi
Summary: This paper introduces a novel metamaterial absorber based on surface plasmon resonance (SPR) that has triple-mode perfect absorption, polarization independence, incident angle insensitivity, tunability, high sensitivity, and a high figure of merit (FOM). The structure of the absorber consists of a graphene array, SiO2 layer, and a gold mirror. The absorber achieves perfect absorption at frequencies of 4.04 THz, 6.76 THz, and 9.40 THz, with absorption peaks of 99.404%, 99.353%, and 99.146%, respectively. It also demonstrates maximum sensitivities in refractive index sensing and has potential applications in photodetectors, optoelectronic devices, and chemical sensors.
Article
Computer Science, Information Systems
Zihao Chen, Pinggen Cai, Qiye Wen, Hao Chen, Yongjian Tang, Zao Yi, Kaihua Wei, Gongfa Li, Bin Tang, Yougen Yi
Summary: In this paper, the perfect absorption of the absorbent is achieved by using the surface plasmon resonance (SPR) method. A multi-frequency broadband absorber based on graphene SPR is proposed, which uses the continuous resonance of patterned graphene to achieve multi-frequency broadband absorption. The proposed structure model has potential value for application in terahertz photoelectric detection, filtering, and electromagnetic shielding.
Article
Chemistry, Analytical
Shuangyan Gao, Kaihua Wei, Hua Yang, Yongjian Tang, Zao Yi, Chaojun Tang, Bin Tang, Yougen Yi, Pinghui Wu
Summary: This article introduces a D-type double open-loop channel floor plasmon resonance (SPR) photonic crystal fiber (PCF) for temperature sensing. This SPR-PCF sensor utilizes the temperature-sensitive property of Polydimethylsiloxane (PDMS) to achieve temperature sensing. The study results show that this sensor has a temperature sensitivity of up to 3757 pm/°C when the temperature varies from 5°C to 45°C. Additionally, the maximum refractive index sensitivity (RIS) of the SPR-PCF sensor is as high as 4847 nm/RIU. These sensors have a simple nanostructure and good sensing performance, and can be widely applied in geological exploration, biological monitoring, and meteorological prediction due to their remarkable RIS and unique nanostructure.
Article
Chemistry, Analytical
Runing Lai, Hao Chen, Zigang Zhou, Zao Yi, Bin Tang, Jing Chen, Yougen Yi, Chaojun Tang, Jianguo Zhang, Tangyou Sun
Summary: This paper introduces a new theoretical proposal for a surface plasmon resonance terahertz metamaterial absorber with five narrow absorption peaks. By controlling the properties of graphene, the absorption rates and frequencies can be dynamically adjusted. The design features dynamic tunability, wide absorption characteristics, and excellent sensitivity.
Article
Chemistry, Analytical
Yanying Zhu, Pinggen Cai, Wenlong Zhang, Tongyu Meng, Yongjian Tang, Zao Yi, Kaihua Wei, Gongfa Li, Bin Tang, Yougen Yi, Sadia Ameen, Niall Tait
Summary: Due to the permanent damage caused by the use of chemical fuels, there is an urgent need for new energy sources. This study proposes a six-layer composite ultra-wideband high-efficiency solar absorber with an annular microstructure, which utilizes the properties of metamaterials and semiconductor materials. The absorber demonstrates high absorption rates in multiple spectral bands, excellent thermal radiation efficiency, and outstanding performance in various applications.
Article
Materials Science, Multidisciplinary
Hao Chen, Yong Wang, Zao Yi, Bo Dai, Bin Tang, Xibin Xu, Yougen Yi
Summary: In this study, we investigated the sensitivity properties of YBa2Cu3O7-delta thin films with a 15(degrees) tilting angle in relation to heat flux density. The films exhibited high crystalline quality and ultra-high sensitivity, making them promising for heat flux sensing applications.
