Article
Materials Science, Multidisciplinary
Kai Sotthewes, Michiel Nijmeijer, Harold J. W. Zandvliet
Summary: The spatial dependence of the local density of states at the Fermi level on a stepped Au(111) surface was studied, revealing that the periodicity of standing waves is influenced by the exact width of the terraces, leading to a variation between 1.5 and 2.1 nm. This unexpected result is explained by considering the superposition of incident and reflected electron waves, which have a periodicity of lambda(F)/2, and the change in periodicity is attributed to the decaying nature of Friedel oscillations.
Article
Chemistry, Analytical
Xiaoxiao Hu, Cuilu Quan, Tiantian Ren, Linan Zhao, Yanting Shen, Yanyan Zhu, Jing Wang
Summary: A novel stimulus-responsive surface-enhanced Raman scattering (SERS) nanoprobe has been developed for sensitive glutathione (GSH) detection using manganese dioxide (MnO2) core and silver/gold nanoparticles (Ag/Au NPs). The MnO2 core acts as a scaffold to amplify the SERS signal and can be degraded in the presence of the target, significantly enhancing the nanoprobe sensitivity for GSH sensing. This sensing system offers a wide linear range and a low detection limit, and has potential applications in intracellular GSH detection and monitoring.
Article
Chemistry, Multidisciplinary
Pengxing Sha, Qingqing Su, Peitao Dong, Tianran Wang, Chushu Zhu, Weiye Gao, Xuezhong Wu
Summary: The use of Ag@Au core-shell nano-rod (NR) array SERS substrate has been shown to successfully prepare a highly sensitive, repeatable, and stable substrate with great potential in the field of biochemical sensing.
Article
Chemistry, Analytical
Yanyan Zhu, Haoran Tang, Hao Wang, Yongxin Li
Summary: Single Ag@AuNWs exhibit high SERS activity and catalytic activity in situ monitoring, serving as a good platform for SERS applications with high sensitivity, stability, and reproducibility.
ANALYTICAL CHEMISTRY
(2021)
Article
Spectroscopy
Xuemin Xia, Yijin Weng, Lei Zhang, Ruyi Tang, Xia Zhang
Summary: Au@Ag nanoparticles synthesized through a simple method can serve as a multifunctional biosensor for label-free detection of hydrogen peroxide and glucose. Under specific conditions, Au@Ag nanoparticles can catalyze the production of glucose acid and hydrogen peroxide, exhibiting strong SERS signals.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
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
Chemistry, Physical
Yazhou Qin, Yuanzhao Wu, Binjie Wang, Jiye Wang, Weixun Yao
Summary: A simple method was developed to grow island-shaped gold nanoparticles on the surface of silver nanowires, creating Ag@Au NWs with combined advantages. By optimizing the density of gold nanoparticles on the Ag NWs surface, excellent uniformity and sensitivity of the SERS substrate were achieved. Furthermore, highly sensitive SERS detection of tropane alkaloids was realized by analyzing characteristic peaks in the obtained SERS spectra.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Chemistry, Multidisciplinary
Veronica Montes-Garcia, Marco A. Squillaci, Marta Diez-Castellnou, Quy Khac Ong, Francesco Stellacci, Paolo Samori
Summary: Noble metal nanoparticles are ideal materials for sensor fabrication, enabling high sensitivity and selectivity, and can be used for environmental and health monitoring.
CHEMICAL SOCIETY REVIEWS
(2021)
Article
Chemistry, Analytical
Yi Xu, Md Mehedi Hassan, Afang Zhu, Huanhuan Li, Quansheng Chen
Summary: A new dual-mode optical-nano-sensor was developed to effectively isolate, discriminate, and inactivate multiple foodborne pathogens by utilizing magnetic SERS tags and functionalized upconversion nanoparticles. This sensor can rapidly and simply detect and kill bacteria in contaminated food, contributing to food safety monitoring.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
Johannes Schultz, Felizitas Kirner, Pavel Potapov, Bernd Buchner, Axel Lubk, Elena V. Sturm
Summary: The study introduces a method for synthesizing Au@Ag@SiO2 cubes with a uniform silica shell, demonstrating their excellent, highly reproducible, and tunable optical response. By varying the thickness of the silica shell, the excitation energies of the plasmon modes in individual nanoparticles can be adjusted over a broad spectral range. A strong coherent coupling of surface plasmons at the silver-silica interface is revealed, leading to significant field enhancement at the encapsulated NP surface.
ADVANCED OPTICAL MATERIALS
(2021)
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, Analytical
Elizaveta P. Morozova, Tatiana E. Smoliarova, Kirill A. Lukyanenko, Maria A. Kirillova, Mikhail N. Volochaev, Anna S. Kichkailo, Rajeev Ranjan, Valentina A. Kratasyuk
Summary: The assessment of microbial contamination is crucial for ensuring food safety. A modern method for evaluating contamination is estimating ATP using firefly luciferase. This study found that gold nanoparticles stabilized with benzalkonium chloride and Triton X-100 enhanced the bioluminescent system, resulting in higher sensitivity for developing an ATP biosensor.
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
Chemistry, Analytical
Ruipeng Chen, Shuang Li, Yunfeng Sun, Bingyang Huo, Yating Xia, Yingkai Qin, Shuning Li, Baodi Shi, Defu He, Jun Liang, Zhixian Gao
Summary: The study describes the design and fabrication of a SERS aptasensor for simultaneous detection of ZEN and OTA in wheat and corn samples, achieving good detection performance with a wide linear range and low detection limits.
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
Chemistry, Physical
Clothilde Comby-Zerbino, Franck Bertorelle, Philippe Dugourd, Rodolphe Antoine, Fabien Chirot
JOURNAL OF PHYSICAL CHEMISTRY A
(2020)
Article
Chemistry, Physical
Krzysztof Nadolski, Emmanuel Benichou, Nina Tarnowicz-Staniak, Andrzej Zak, Christian Jonin, Katarzyna Matczyszyn, Pierre-Francois Brevet
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Chemistry, Physical
Quentin Martinet, Alice Berthelot, Adrien Girard, Baira Donoeva, Clothilde Comby-Zerbino, Elodie Romeo, Franck Bertorelle, Marte van der Linden, Nathalie Tarrat, Nicolas Combe, Jeremie Margueritat
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Materials Science, Multidisciplinary
Oswaldo Sanchez-Dena, Zacharie Behel, Estelle Salmon, Emmanuel Benichou, Jorge-Alejandro Reyes-Esqueda, Pierre-Francois Brevet, Christian Jonin
Article
Chemistry, Physical
Antonin Pardon, Oriane Bonhomme, Clotilde Gaillard, Pierre-Francois Brevet, Emmanuel Benichou
Summary: The homologous series of ionic liquids [CnC(1)im][NTf2] with different alkyl chain lengths was studied using polarization-resolved second harmonic scattering (SHS). The analysis revealed an octupolar contribution dominating the SHS response, with orientational correlations observed on the nanometer scale even for the shortest alkyl chain length. There was a sharp transition in correlation range between ionic liquids with n = 4 and n = 6, indicating the dominant role of the alkyl chains.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Multidisciplinary Sciences
Guillaume Revillod, Julien Duboisset, Isabelle Russier-Antoine, Emmanuel Benichou, Christian Jonin, Pierre-Francois Brevet
Summary: A general model has been developed to describe the polarization-resolved second harmonic scattering (SHS) response from a liquid solution of molecular aggregates, considering both coherent and incoherent contributions based on the spatial order of the molecules. The model shows that the SHS response can differentiate between centrosymmetric and non-centrosymmetric spatial arrangements of the nonlinear dipoles, providing insights into the spatial arrangements of dyes in aggregates despite their small nanoscale dimensions.
Article
Chemistry, Multidisciplinary
Guillaume F. Combes, Hussein Fakhouri, Christophe Moulin, Marion Girod, Franck Bertorelle, Srestha Basu, Romain Ladouce, Martina Peric Bakulic, Zeljka Sanader Marsic, Isabelle Russier-Antoine, Pierre-Francois Brevet, Philippe Dugourd, Anita Krisko, Katarina Trajkovic, Miroslav Radman, Vlasta Bonacic-Koutecky, Rodolphe Antoine
Summary: This study introduces a new strategy for tailoring gold nanoclusters to accurately detect protein carbonylation, providing a new avenue for applications in biological imaging.
COMMUNICATIONS CHEMISTRY
(2021)
Article
Chemistry, Physical
O. Bonhomme, L. Sanchez, E. Benichou, P. F. Brevet
Summary: Processes involving a reduced number of molecules in solution are difficult to characterize, but can be investigated using SHS to study surfactant micellization before reaching the critical micellar concentration. The experimental results are explained by a simple model based on chemical equilibria between monomers and micelles, and polarization resolved experiments reveal long-range molecular orientation correlation.
JOURNAL OF PHYSICAL CHEMISTRY B
(2021)
Article
Chemistry, Multidisciplinary
Franck Bertorelle, K. David Wegner, Martina Peric Bakulic, Hussein Fakhouri, Clothilde Comby-Zerbino, Amin Sagar, Pau Bernado, Ute Resch-Genger, Vlasta Bonacic-Koutecky, Xavier Le Guevel, Rodolphe Antoine
Summary: Atomically precise gold nanoclusters with molecule-like properties and outstanding photoluminescence (PL) are highly attractive for selective biomolecule labeling in biological mechanism investigations. In this study, a simple method to incorporate a preformed Au-25 nanocluster into bovine serum albumin (BSA) protein was reported. The combination of small-angle X-ray scattering and molecular modeling successfully localized a single Au-25 within the protein to a cysteine residue on the gold nanocluster surface. Attaching Au-25 to BSA significantly modified the PL properties, resulting in enhancement and a redshift in the second near-infrared window. This research paves the way for the design of selective sensitive probes using a ligand-based strategy for optical detection of biomolecules in a cellular environment by live imaging.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Physical
Guillaume Le Breton, Oriane Bonhomme, Emmanuel Benichou, Claire Loison
Summary: Second harmonic scattering (SHS) is a preferred method for investigating the molecular structure of liquids. However, quantitatively interpreting the scattering due to solvents remains difficult. In this study, a quantum mechanics/molecular mechanics (QM/MM) approach was used to model the polarization-resolved SHS intensity of liquid water and quantify different contributions to the signal. It was found that fluctuations and correlations in molecular hyperpolarizability play a significant role in determining the scattering intensities.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Guillaume Le Breton, Oriane Bonhomme, Emmanuel Benichou, Claire Loison
Summary: In this study, electronic gamma(2 omega, omega, omega,0) and beta(2 omega, omega, omega) for water molecules in liquid water are computed using QM/MM calculations. The average value of gamma(2 omega, omega, omega,0) is smaller in the liquid phase compared to the gas phase, with a relatively small standard deviation among molecules. The study demonstrates that the average bulk second hyperpolarizability gamma(2 omega, omega, omega,0) can be used to describe the electrostatic effects of the distant neighborhood on the first hyperpolarizability beta(2 omega, omega, omega).
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Guillaume Le Breton, Oriane Bonhomme, Pierre-Francois Brevet, Emmanuel Benichou, Claire Loison
Summary: Surface Second-Harmonic Generation (S-SHG) experiments offer a unique method to probe interfaces, with the interpretation of S-SHG intensities at the molecular level being a key issue. Research shows that the first hyperpolarizability of water molecules is highly sensitive to their environment, varying with distance relative to the interface.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Evan Rizzel Gran, Franck Bertorelle, Hussein Fakhouri, Rodolphe Antoine, Martina Peric Bakulic, Zeljka Sanader Marsic, Vlasta Bonacic-Koutecky, Manon Blain, Jack Antel, Dusica Maysinger
Summary: The study reveals that ultra-small gold nanoclusters are not inert in human primary astrocytes and play a critical role in modulation of organellar and redox-responsive transcription factor homeostasis. Size-dependent effects were most remarkable with smaller and larger AuNCs, potentially related to their accessibility to biological targets.
Proceedings Paper
Nanoscience & Nanotechnology
Anthony Maurice, Zacharie Behel, Isabelle Russier-Antoine, Emmanuel Benichou, Christian Jonin, Pierre-Francois Brevet
SYNTHESIS AND PHOTONICS OF NANOSCALE MATERIALS XVII
(2020)
Article
Medicine, Research & Experimental
Dusica Maysinger, Evan R. Gran, Franck Bertorelle, Hussein Fakhouri, Rodolphe Antoine, Esha S. Kaul, Dana M. Samhadaneh, Ursula Stochaj