Article
Nanoscience & Nanotechnology
Yanlin Li, Wenyuan Duan, Jian Wei
Summary: The study synthesized CoFe2O4/Ag nanostructures as SERS substrates with high sensitivity, good stability, and excellent magnetic response for efficient separation and reusability.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Thi Huyen Trang Nguyen, Thi Mai Anh Nguyen, Cong Doanh Sai, Thi Hai Yen Le, Thi Ngoc Anh Tran, Thanh Cong Bach, Van Vu Le, Nguyen Hai Pham, An Bang Ngac, Viet Tuyen Nguyen, Thi Ha Tran
Summary: The research combined sputtering and post annealing methods to prepare gold nanoparticles with uniform distribution on cover glass substrates, and studied the effect of gold thickness on the formation of nanoparticles. The study also analyzed the impact of size, inter-distance, and morphology of gold NPs on plasmon properties using SEM and absorption spectroscopy. Different morphologies' enhancement capabilities were verified using FDTD technique, demonstrating the efficient performance of the prepared gold nanoparticles arrays as SERS substrates.
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
Tingting Fan, Yan Ke, Lijun Zhang, Li Cai, Zhongbo Li
Summary: A large-area three-dimensional well-ordered Co(OH)(2) nanoflower array film decorated with Ag nanoparticles was designed and optimized as a sensitive SERS substrate for trace detection of pesticides, showing great potential in pesticide detection.
Article
Chemistry, Analytical
W. Cheuquepan, S. Hernandez, M. Perez-Estebanez, L. Romay, A. Heras, A. Colina
Summary: Electrochemistry can be used to generate SERS substrates, utilizing the plasmonic properties of nanos-tructures and the chemical mechanism, with time-resolved Raman spectroelectrochemistry providing valuable information. Comparing Au and Ag metals for folic acid detection in drugs, it was found that Ag SERS substrates outperformed Au SERS substrates in complex samples.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Xudong Cheng, Jing Jin, Mengting Shi, Minghui Ge, Jinqi Miao, Cheng Ci, Zhenyu Xue, Peimei Dong
Summary: A facile and green synthesis strategy was used to prepare a uniform three-dimensional (3D) nanostructure as surface-enhanced Raman scattering (SERS) sensors by decorating Ag nanoparticles (AgNPs) on TiO2 nanorod arrays. The AgNPs were distributed uniformly on the surface of TiO2 nanorods, as confirmed by XPS, SEM, and TEM analyses. The 3D hybrid substrate exhibited sensitive SERS signals and excellent spatial uniformity. The results also demonstrated the promising potential of the two-step synthesis strategy for preparing 3D hybrid nanostructure substrates for SERS.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Muhammad Shafi, Runcheng Liu, Zhipeng Zha, Can Li, Xuejian Du, Sartaj Wali, Shouzhen Jiang, Baoyuan Man, Mei Liu
Summary: SERS substrates based on hyperbolic metamaterials exhibit high sensitivity, good reproducibility, reusability, and strong enhancement factors. Adjustment of multilayer stacking and interparticle gaps of Ag NPs can further enhance SERS activity in the proposed substrate design. Ultra-low limits of detection for melamine in milk were achieved, meeting the requirements for successful implementation in the food safety field.
APPLIED SURFACE SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Ilya A. Milekhin, Alexander G. Milekhin, Dietrich R. T. Zahn
Summary: This study presents the optical response of spherical CdSe nanocrystals using SERS and TERS techniques, achieving significant enhancement of optical phonons by selecting appropriate plasmonic substrates. Combining Raman scattering with atomic force microscopy offers nanoscale spatial resolution for investigating phonon properties. Gap-mode TERS further enhances Raman scattering of CdSe NCs' optical phonon modes with nanometer spatial resolution, providing new pathways for optical characterization and phonon spectrum details at the nanometer scale of single semiconductor nanostructures.
Article
Chemistry, Multidisciplinary
Qing Chen, Marie Betker, Constantin Harder, Calvin J. Brett, Matthias Schwartzkopf, Nils M. Ulrich, Maria E. Toimil-Molares, Christina Trautmann, L. Daniel Soederberg, Christian L. Weindl, Volker Koerstgens, Peter Mueller-Buschbaum, Mingming Ma, Stephan Roth
Summary: This study reports a novel strategy of utilizing cellulose nanofibril (CNF) as a template to fabricate TiO2/CNF thin films with tailored morphology and crystallinity for enhanced SERS sensitivity. By combining atomic layer deposition and thermal annealing, polymorphous TiO2/CNF thin films with defined morphology were achieved, showing a high enhancement factor in semiconductor metal oxide nanomaterial (SMON)-based SERS substrates. The improved SERS sensitivity is attributed to the cooperative modulation of CNF template morphology and TiO2 crystalline state.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Yu-Chi Chang, Mykhaylo M. Dvoynenko, Hao Ke, Hui-Hsin Hsiao, Yuh-Lin Wang, Juen-Kai Wang
Summary: Silver nanoparticles grown in nanochannels of anodic aluminum oxide on a grating form a surface-enhanced Raman scattering (SERS) substrate with double resonance from both localized and delocalized plasmons. The addition of a grating enhances the SERS signals, which are inherently wavelength-dispersed, enabling simpler designs of SERS-based sensors without the need for a spectrometer. Angle-resolved reflectance spectroscopy and electrodynamic simulation were utilized to characterize the surface plasmon polariton (SPP) of the grating and confirm the SERS enhancement mechanism.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Nanoscience & Nanotechnology
Yating Feng, Jiaxue Dai, Chuyun Wang, Hongyang Zhou, Jianhua Li, Gang Ni, Maofeng Zhang, Youju Huang
Summary: In this study, a sandwich structure based on surface-enhanced Raman scattering (SERS) was constructed, using AgNPs/Au@AgNRs, for the detection of perfluoro- and polyfluoroalkyl substances (PFAS). The results showed that the AgNPs/Au@AgNRs structure enabled highly sensitive detection of PFAS, with the ability to quantitatively detect model molecules and a wide range of PFAS. The sensitivity could reach 0.1 ppm. This research has significant implications for environmental sustainability and human health protection.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Haining Li, Bing Yang, Biao Yu, Nan Huang, Lusheng Liu, Jiaqi Lu, Xin Jiang
Summary: Treatment of hydrogen plasma on silicon nanowires, followed by coatings of nanocrystalline diamond and multilayer graphene, enables enhanced Raman signals with reduced fluorescent background. The graphene-coated nanowires show lower fluorescent background than diamond-coated ones, with a minimum detection limit of 10(7) mol/L and an enhancement factor exceeding 10(4). The stable Raman enhancement is attributed to hydrogen-terminated graphene and the nanowire structure, independent of graphene layers and maintaining stability after exposure to the atmosphere for a month.
APPLIED SURFACE SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Hao Lei, Yan Li, Meng-wei Guo, Qi-bo Zhang
Summary: A smooth Ag substrate was converted in-situ to form a nanoporous architecture by applying a redox potential signal in an alkaline solution with an appropriate pH range. The phase constitution and microstructure evolution process of the Ag substrate induced by the electrochemical redox tuning approach were systematically investigated. The expansion and contraction of the unit volume during the highly reversible electrochemical process led to the formation of highly porous Ag architectures.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Chemistry, Multidisciplinary
Haichao Zhai, Chuhong Zhu, Xiujuan Wang, Yupeng Yuan, Haibin Tang
Summary: This study presents a simple method for fabricating arrays of Ag-nanoparticles decorated TiO2 nanotubes. These nanotube arrays exhibit high sensitivity and can be reused for rapid and trace SERS detection of organic chemicals.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Nikolay P. Simonenko, Andrey G. Musaev, Tatiana L. Simonenko, Philipp Yu. Gorobtsov, Ivan A. Volkov, Alexander A. Gulin, Elizaveta P. Simonenko, Vladimir G. Sevastyanov, Nikolay T. Kuznetsov
Summary: This article proposes a facile one-step method for forming silver thin-film nanostructures on Al2O3 substrates using the hydrothermal method. The study shows the dependency of the SERS effect intensity of the formed films on synthesis conditions, additional temperature treatment, and laser radiation wavelength. The article also demonstrates the effect of synthesis temperature on the particle size, crystal structure, and microstructure features of the obtained thin films based on silver nanoparticles. Additionally, the study reveals the factors associated with the properties of the obtained SERS substrates and the parameters of recording the spectra that affect the amplification factor of the spectral lines intensity of the analyte.
Article
Chemistry, Multidisciplinary
Yanjun Yang, Chunyuan Song, Jingjing Zhang, Jie Chao, Hoang Mai Luong, Yiping Zhao, Lianhui Wang
Summary: This article introduces a surface-enhanced Raman scattering (SERS) sensor based on a functionalized multiple-armed tetrahedral DNA nanostructure, which is capable of detecting multiple nucleic acid and protein biomarkers related to lung cancer and has enhanced sensitivity. The sensor achieves enhanced Raman signals through DNA self-assembled gold nanoparticle clusters in multiplex detections.
Article
Chemistry, Analytical
Yanjun Yang, Jackelyn Murray, James Haverstick, Ralph A. Tripp, Yiping Zhao
Summary: The researchers developed a rapid coronavirus detection method using a functionalized silver nanotriangle array localized surface plasmon resonance sensor. The sensor shows high sensitivity and specificity in detecting SARS-CoV-2 infection, and the detection time is less than 20 minutes.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Physics, Applied
Nima Karimitari, Bin Ai, Yiping Zhao
Summary: A detailed analysis was conducted on the Born-Kuhn model for two coupled oscillators and compared to the chiral optical properties of the corner-stacked plasmonic nanorods (CSPNs). The study found that the Born-Kuhn model, based on normalized coupling constant and damping constant, could accurately predict the chiral optical response of CSPNs.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Review
Chemistry, Multidisciplinary
Bin Ai, Yujing Sun, Yiping Zhao
Summary: This review provides an overview of plasmonic hydrogen sensors (PHS) based on nanostructures. PHS offer high sensitivity, fast response speed, miniaturization, and high-degree of integration. The review discusses the working principle, sensing properties, and the effects of resonance mode, configuration, material, and structure on the sensing performances. It also summarizes the advantages and disadvantages of different types of plasmonic nanostructures and proposes potential development directions. The aim of this review is to clarify current strategies for PHS and provide a comprehensive understanding of their working principle to inspire innovative designs and execution of advanced hydrogen sensors.
Article
Nanoscience & Nanotechnology
Yanfeng Wang, Shen Ao, Fei Yang, Zhengjun Zhang, Yiping Zhao
Summary: By independently tuning the structure parameters of the nanorods in nanohole arrays, a mode splitting phenomenon can be introduced, which improves the performance of plasmonic sensors.
ACS APPLIED NANO MATERIALS
(2022)
Article
Biophysics
Nicholas Filla, Yiping Zhao, Xianqiao Wang
Summary: In this paper, a phenomenological, bilinear, force-strain model is derived to accurately reproduce the fibrin fiber force-strain curve. The model assumes that the initial linear response is due to entropic extension of polypeptide chains, and the final linear response is due to enthalpic extension of protofibrils. The model provides strong support to a previously proposed deformation mechanism and offers a rigorous tool for analyzing fibrin fiber force-strain data and simulating fibrin fibers in tension.
BIOMECHANICS AND MODELING IN MECHANOBIOLOGY
(2023)
Article
Physics, Applied
Andrei Galiautdinov, Yiping Zhao
Summary: During the operation of a core-shell nanoparticle based localized surface plasmon resonance (LSPR) sensor, target molecules penetrate into the shell layer, resulting in nonuniform distribution of molecules or reactants. This phenomenon is observed in composition graded plasmonic particles, which exhibit different LSPR characteristics compared to uniform core-shell particles. A perturbation theory is developed to predict the LSPR properties of composition graded plasmonic particles, considering the effects of composition gradient caused by metal hydride, dielectric, and effective medium. The results demonstrate the tunability of LSPR peak location and amplitude by different configurations of the composition gradient. These findings are crucial for understanding the sensing performance of composition graded plasmonic particles and can be applied to other composition graded structures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yanjun Yang, Hao Li, Les Jones, Jackelyn Murray, James Haverstick, Hemant K. Naikare, Yung-Yi C. Mosley, Ralph A. Tripp, Bin Ai, Yiping Zhao
Summary: A rapid and cost-effective method for detecting SARS-CoV-2 infection has been developed using a deep learning algorithm. The method utilizes a DNA-functionalized AgNR array SERS sensor to rapidly detect SARS-CoV-2 RNA in human nasopharyngeal swab specimens. The detection process can be completed within 25 minutes and achieves high accuracy in classifying positive and negative samples. This method shows promise as a potential rapid point-of-care COVID-19 diagnostic platform.
Article
Nanoscience & Nanotechnology
Yanfeng Wang, Dexian Ye, Fengtong Zhao, Zhengjun Zhang, Yiping Zhao
Summary: Shadow sphere lithography is a powerful method for fabricating nanostructures and has potential applications in producing plasmonic photonic crystals and metamaterials. This study shows that Monte Carlo simulation is effective in predicting the structure details and plasmonic properties, providing guidance for the design of optical applications based on shadow sphere lithography.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Mona Asadinamin, Aleksandar Zivkovic, Susanne Ullrich, Henning Meyer, Yiping Zhao
Summary: The study provides insights into the charge dynamics of a CuO thin film using transient absorption spectroscopy, revealing the role of different excitation energies in the photocatalytic process. This information is crucial for designing and optimizing materials for renewable energy applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Hoang Mai Luong, Tu Anh Ngo, Minh Thien Pham, Yiping Zhao, George Keefe Larsen, Thuc-Quyen Nguyen, Tho Duc Nguyen
Summary: Magnetism in curved nano-geometries has led to the exploration of a hexagonally-packed array of magnetic nano-caps as a sensing element for the spark-free magnetic-circular-dichroism (MCD) H-2 sensor. The MCD H-2 sensor outperforms current optical sensors and meets the performance targets set by the US Department of Energy. The sensor exhibits fast response time, high selectivity, and low limit of detection.
Article
Chemistry, Multidisciplinary
Yilong Ju, Oara Neumann, Mary Bajomo, Yiping Zhao, Peter Nordlander, Naomi J. Halas, Ankit Patel
Summary: This article presents a machine learning algorithm that can identify chemicals by matching their SERS spectra to a standard Raman spectral library. The algorithm uses a facial recognition-like approach for spectral recognition and quantifies the degree of similarity to a Raman spectrum using a metric called Characteristic Peak Similarity (CaPSim). The analysis shows that CaPSim outperforms existing spectral matching algorithms in terms of accuracy. This machine learning-based approach could greatly facilitate the spectroscopic identification of molecules in fieldable SERS applications.
Article
Chemistry, Multidisciplinary
Shahab Razavi, Yiping Zhao
Summary: This study demonstrates that a hybridized plasmonic mode in a compound nanohole structure can be described as a quasi-dipole oscillator. By introducing two nanorods into a nanohole, these two quasi-dipoles can couple and hybridize, resulting in additional transmission peaks. The intensities and separations of these peaks can be controlled by adjusting the incident polarization and modifying the nanorod length. This concept can be extended to predict the behavior of more complex compound configurations, allowing for precise engineering of transmission peaks.
Article
Chemistry, Multidisciplinary
Yiping Zhao
Summary: This paper presents a comprehensive theoretical framework for understanding surface-enhanced Raman scattering (SERS) measurements, focusing on the principles of electromagnetic enhancement. The study investigates different types of SERS substrates and their interactions with molecules, providing explanations for various phenomena observed in SERS measurements. The findings offer valuable guidance for optimizing SERS substrate design and improving the accuracy of SERS detection.
Article
Chemistry, Multidisciplinary
Yanjun Yang, Beibei Xu, James Haverstick, Nabil Ibtehaz, Artur Muszynski, Xianyan Chen, Muhammad E. H. Chowdhury, Susu M. Zughaier, Yiping Zhao
Summary: The study successfully differentiated and classified bacterial endotoxins using surface enhanced Raman scattering spectra, achieving 100% accuracy with the RamanNet algorithm. This approach has the potential for rapid medical diagnosis and therapeutic decision-making.
