Article
Chemistry, Analytical
Najwan Albarghouthi, Presley MacMillan, Christa L. Brosseau
Summary: This study focused on optimizing SERS sensors constructed using gold nanorod arrays for the sensitive detection of atrazine. The effect of relative humidity on the self-assembly of gold nanorods into arrays was explored, and para-aminothiophenol was used as a SERS probe to assess SERS performance, ultimately highlighting the detection of atrazine. This work is the first to explore relative humidity as an optimization strategy for controlled alignment of gold nanorods for SERS analysis of atrazine.
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
Yun-Xiao Zhao, Wei-Wei Zhu, Ye-Yu Wu, Yu-Yun Chen, Fang-Kai Du, Jun Yan, Xue-Cai Tan, Qi Wang
Summary: A rapid and sensitive quantitative detection method for formaldehyde based on surface-enhanced Raman scattering (SERS) using gold nanorods (GNRs) has been developed in this study. The method takes advantage of the enhanced function of GNRs to reduce the detection limit of formaldehyde, offering simplicity, rapid performance, and cost effectiveness.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Lisheng Zhang, Xueyan Wang, Yiyuan Zhang
Summary: The research focuses on using SERS technique to monitor the plasma-driven photocatalytic reaction process on the surface of silver nanoarrays. The research demonstrates the catalysis of local surface plasmon to generate 4'-dimercaptoazobenzene (DMAB) and the reverse reaction to form PATP molecule in the presence of in situ sodium borohydride by plasma.
Article
Chemistry, Multidisciplinary
Meihong Ge, Pan Li, Guoliang Zhou, Siyu Chen, Wei Han, Feng Qin, Yuman Nie, Yaoxiong Wang, Miao Qin, Guangyao Huang, Shaofei Li, Yongtao Wang, Liangbao Yang, Zhongqun Tian
Summary: This method utilizes a nanocapillary pumping model to actively capture target molecules in small gaps, achieving high sensitivity detection. It can maintain an efficient and stable signal for 1-2 minutes during dynamic detection, and can also monitor material transformation processes in biological systems.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Miriam Parmigiani, Benedetta Albini, Giovanni Pellegrini, Marco Genovesi, Lorenzo De Vita, Piersandro Pallavicini, Giacomo Dacarro, Pietro Galinetto, Angelo Taglietti
Summary: This paper explores the use of surface-enhanced Raman scattering (SERS) as an analytical tool and demonstrates the enhancement of SERS response by coating gold nanostars (GNS) with a layer of silver. The resulting SERS chips, prepared using a simple chemistry technique, showed high efficiency and reproducibility in detecting various classes of pollutants. Notably, the detection limit for norfloxacin was as low as 3 ppb, one of the lowest limits achieved with this technique for the analyte.
Article
Chemistry, Physical
Maxime Bronchy, Lucien Roach, Laurent Mendizabal, Celine Feautrier, Etienne Durand, Jean-Marc Heintz, Etienne Duguet, Mona Treguer-Delapierre
Summary: This study examined the potential of silver nanocubes to achieve sintered conductive junctions for microelectronics and die-attach bonding devices. The nanocubes offer advantages of a higher proportion of surface atoms and the ability to assemble into denser 3D colloidal packings. By studying the thermal stability and electrical properties of nanocube arrays, it was found that the self-organized arrays with small gaps exhibited high electrical conductivity.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Engineering, Electrical & Electronic
Graham Dawson, Xiaorong Cheng, Anthony Centeno, Yulia Pilyugina, Wentian Niu, Ruochen Liu
Summary: In this study, a novel triad nanocomposite was prepared with excellent SERS properties. By controlling the size and position of silver nanoparticles, and matching the localized surface plasmon resonance (LSPR) of the silver particles with the Raman excitation wavelength, a SERS enhancement greater than 6 orders of magnitude was achieved. Electromagnetic modeling was used to provide a theoretical basis for these results.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Vu Duc Chinh, Nguyen Thuy Van, Pham Thanh Binh
Summary: Au-Ag bimetallic nanoparticles (BNPs) with varying molar fractions of Au0.2Ag0.8 and Au0.3Ag0.7 were prepared on porous silicon and used as surface-enhanced Raman scattering (SERS) substrates for detecting thiabendazole (TBZ) molecules at a concentration of 10-7 M. The effect of Au content on the SERS properties of the Au-Ag BNPs was investigated, and the composition-dependent SERS spectra and adsorption mechanism of TBZ on Au-Ag BNPs surfaces were discussed.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Shengyuan Yao, Yan Lv, Qing Wang, Jinhui Yang, Hongmei Li, Ningning Gao, Furu Zhong, Jihong Fu, Jun Tang, Tao Wang, Dianzeng Jia
Summary: As a new 2D carbon allotrope, graphdiyne (GDY) with its unique electronic space arrangement structure has the characteristics of uniform pores and large specific surface area. A novel gold nanoparticles (Au NPs)/GDY/carbon cloth (CC) SERS substrate was fabricated using GDY nanowall as support. The substrate showed good sensitivity in detecting organic dyes.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jianfu Ding, Zhao Li, Oltion Kodra, Martin Couillard, Jianying Ouyang, Francois Lapointe, Patrick R. L. Malenfant
Summary: Single-walled carbon nanotubes (SWCNTs) have high potential as matrices for loading metal nanoparticles (NPs) due to their conductivity, strength, surface area, stability, and ease of modification. Anchoring metal complexes onto SWCNTs through noncovalent interactions is a viable strategy for achieving high-level metal dispersion and charge transfer capacities. However, traditional metal complexes have limitations in providing excellent sensing and catalytic capabilities. In this study, poly(9,9-di-n-dodecylfluorenyl-2,7-diyl-alt-2,2'-bipyridine-5,5') (PFBPy) was used to enhance the noncovalent interactions between silver nanoparticles (AgNPs) and SWCNTs.
Article
Chemistry, Physical
Cosmin Farcau
Summary: This study demonstrates that silver films deposited over regular arrays of polystyrene colloids, known as AgFoN, can function as a plasmonic substrate for SPRS, SERS, and SEF. The optical response of AgFoN fabricated with colloids of different sizes is highly sensitive to the adsorption of MUA molecules, with SERS and SEF spectra obtained from the same molecules. FDTD simulations are used to explain the size-dependent SERS behaviors observed experimentally.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Materials Science, Multidisciplinary
Jingyu Li, Shaofeng Zhang, Jiao Yang, Xudong Zheng
Summary: This study successfully prepared stable and highly sensitive TiO2-x nanorod films through vacuum annealing treatment. The presence of a high density of oxygen vacancy-related electronic states and the formation of an ultra-thin TiO2 layer on the surface were found to enhance the SERS performance of the TiO2 nanorod films.
Article
Chemistry, Multidisciplinary
Jaber Keyvan Rad, Amir Reza Ghomi, Ali Reza Mahdavian
Summary: Photoswitchable nanofibers and nanocomposite fibers with plasmonic nanoparticles were prepared using photochemical and electrospinning techniques. The inclusion of vinylimidazole into the copolymer chains resulted in well-dispersed AuNRs. Photostudies showed a higher reflective intensity for MBVSP@F due to greater chain flexibility. Furthermore, the presence of AuNRs enhanced the photochromic properties of the nanocomposite fibers.
Article
Chemistry, Physical
Claire Goldmann, Marta De Frutos, Eric H. Hill, Doru Constantin, Cyrille Hamon
Summary: The study introduces a simple aqueous approach to breaking the inversion symmetry of silver nanorods by controlling the addition of DMSO, showcasing the potential of DMSO for controlling complex nanostructure synthesis. Simulations and experiments demonstrate the impact of DMSO adsorption on various surface interactions, affecting the deposition kinetics of silver.
CHEMISTRY OF MATERIALS
(2021)
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
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
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
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
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
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, 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
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
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
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
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
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.
