Article
Chemistry, Multidisciplinary
Gregory Barbillon, Octavio Graniel, Mikhael Bechelany
Summary: The SERS effect was significantly improved by assembled Au/ZnO nano-urchins due to their excellent adsorption capacity for thiram molecules. The detection limit for thiram was found to be 10 pM, with an adsorption capacity (K) of 9.5 x 10(6) M-1 and an analytical enhancement factor of 1.9 x 10(8).
Article
Chemistry, Physical
N. K. Murugasenapathi, K. A. Esther Jebakumari, S. Jamal Mohamed, K. Giribabu, Tamilarasan Palanisamy
Summary: In this study, the redox reaction of Nile Blue A on a glassy carbon surface was investigated using pinhole-free silica-coated silver nanoparticles for Raman signal enhancement. The interference from silver in the reaction mechanism was observed and the pinhole-free silica layer prevented hot electron transfer, providing interference-free enhancement to the Raman signals.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Min Gao, Yi-Bo Zhao, Zhi-Jun Zhao, Guangyu Qiu, Yile Tao, Guochen Bao, Ying Du, Martin Spillmann, Jiukai Tang, Soonhyoung Hwang, Jun-Ho Jeong, Jing Wang
Summary: Multiplex sensing platforms are crucial for various applications such as intelligent diagnosis and environmental monitoring. The development of nanofabrication technologies has greatly improved the performance of these sensors in the past decades. However, there are still challenges in achieving cost-effective and large-scale fabrication processes. Nano-transfer printing and imprinting technology have shown potential in fabricating 100 nm structures efficiently.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Crystallography
Siarhei Zavatski, Anatoli I. I. Popov, Andrey Chemenev, Alma Dauletbekova, Hanna Bandarenka
Summary: In this study, the relationship between the structural parameters of porous silicon (PS) and the morphology of gold nanostructures fabricated on its surface, with a focus on SERS response, is investigated. By coating PS surfaces with gold, large-area plasmonic gold nanostructures are fabricated, suitable for a wide range of plasmonic applications.
Article
Chemistry, Multidisciplinary
Gregory Barbillon, Christophe Humbert, Maria Ujue Gonzalez, Jose Miguel Garcia-Martin
Summary: In this study, we investigated chemical sensing using surface-enhanced Raman scattering with gold nanocolumn templates. The glancing angle deposition with magnetron sputtering technique was chosen for its low-cost production and ease of implementation. The fabricated gold nanocolumnar structures allowed for the production of a high density of strongly confined electric field spots. The vertical and tilted nanocolumnar templates showed promising results for the detection and adsorption of thiophenol molecules.
Article
Chemistry, Physical
Yuan Lin, Bingchang Zhang, Yihao Shi, Yongchao Zheng, Jia Yu, Jiansheng Jie, Xiaohong Zhang
Summary: Silicon-based field effect transistor (FET) sensors with high sensitivity have great potential for detecting chemical/biological species. This study investigates the impact of strain on the field-effect sensing property of silicon wires using humidity sensing as an example. The results show that the humidity sensitivity of FET sensors based on silicon wires increases with tensile strain but decreases with compressive strain. The findings highlight the potential of strain engineering in modulating the field-effect sensing property of Si wires for highly sensitive FET sensors.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Biochemistry & Molecular Biology
Setumo Lebogang Thobakgale, Saturnin Ombinda-Lemboumba, Patience Mthunzi-Kufa
Summary: This study demonstrates the use of surface enhanced Raman spectroscopy (SERS) for monitoring the molecular behavior of aspirin and tenofovir as a screening method for medication quality control. The combination of gold-coated slides and gold/dextran nanoaggregates enhances the Raman signal of the drugs. Qualitative analysis reveals trends in peak area increase with polarizability, electron density, and decrease in atomic radii.
Article
Optics
Tristan Madeleine, Giampaolo D'alessandro, Malgosia Kaczmarek
Summary: Plasmonic resonances in sub-wavelength cavities formed by metallic nanocubes separated from a metallic surface by a dielectric gap have potential applications in spectroscopy, enhanced light emission, and optomechanics. However, the limited choice of metals and size constraints restrict the optical wavelength range of these applications.
Article
Materials Science, Multidisciplinary
Ksenia Maleeva, Daler Dadadzhanov, Alena Palekhova, Ilia Kaliya, Anton Tkach, Alexander Baranov, Kirill Bogdanov
Summary: We have developed a self-assembled plasmonic film consisting of 20 nm gold nanoparticles and a protective polymer matrix, which enables detection of SERS signals in various environments, pH ranging from 3 to 9, and high temperature up to 150 degrees C. This SERS substrate serves as a sensing platform with retained enhancement characteristics when transferred from stationary spectroscopy to microfluidic systems, and it can be reused and quickly respond to changes in analytes. Our SERS-based sensor has demonstrated clear visibility for real analytes, even at a concentration as low as 10(-5) M.
Article
Chemistry, Multidisciplinary
Lei Yao, Qi Hao, Mingze Li, Xingce Fan, Guoqun Li, Xiao Tang, Yunjia Wei, Jiawei Wang, Teng Qiu
Summary: We propose and demonstrate sandwich plasmonic nanocavities as a surface-selection ruler to illustrate molecular orientations using surface-enhanced Raman spectroscopy. The field vector in the nanocavity presents a transverse spinning feature under specific excitations, allowing the selective amplification of Raman modes of target molecules. This method can be extended as a universal ruler for the identification of molecular orientations.
Article
Optics
Gregory Barbillon
Summary: This study presents a research on the sensing of chemical molecules using Au nanoparticles coated ZnO film by employing the photo-induced enhanced Raman scattering (PIERS) coupled to the surface-enhanced Raman scattering (SERS). The aim of coupling the PIERS to classical SERS is to achieve high sensitivity of detection. The detection of thiophenol showed a limit concentration of 100 pM, an adsorption capacity (K-Ads) of 3.2 x 10(6) M-1 and an analytical enhancement factor of 1.9 x 10(10).
Article
Nanoscience & Nanotechnology
Xin Wang, Seokgyun Ham, Wei Zhou, Rui Qiao
Summary: In this study, molecular dynamics simulations were used to investigate the adsorption of rhodamine 6G and choline molecules on gold electrodes with different surface charges. The results show that both molecules can adsorb on gold surfaces at all surface charge densities, but the adsorption mechanisms and configurations may vary.
Article
Engineering, Electrical & Electronic
Natalia Tokranova, Nathaniel Cady, Avery Lamphere, Igor A. Levitsky
Summary: This article presents a highly sensitive detection method for fentanyl using nanoporous silicon and specific antibody functionalization. The electrochemical sensor and square wave voltammetry are employed to detect low concentrations of fentanyl in phosphate buffer and human sweat. The future goal is to develop a wearable sweat sensor array for rapid on-site detection of multiple opioids.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Physical
Marko Skrabic, Maria Krajac, Marijan Gotic, Nikola Baran, Lara Mikac, Tanja Jurkin, Nikola Segedin, Mile Ivanda, Ozren Gamulin
Summary: This work explores the use of porous silicon as a SERS-active substrate for near-infrared 1064 nm excitation. Two methods, including the production of porous silicon photonic crystals and the deposition of gold nanoparticles, were discussed for quenching the crystal silicon band-gap photoluminescence. The capability of these substrates for SERS enhancement was evaluated and the advantages and drawbacks of both methods were addressed.
APPLIED SURFACE SCIENCE
(2024)
Article
Engineering, Electrical & Electronic
Doaa Sulaiman, Alwan M. Alwan, Walid K. Hamoudi
Summary: Bimetallic alloys nanoparticles were synthesized and combined with Si nano-pillars substrates to prepare SERS sensors, showing excellent recognition of ultra-low concentrations of chlorpyrifos solutions, with the highest enhancement factor obtained in Au-Pd sensors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
A. K. Sarychev, A. Ivanov, G. Barbillon
Summary: This theoretical study demonstrates that a giant electromagnetic field can be generated in a supernarrow nanoslit formed by a silver cylinder and a flat mirror surface, resulting in resonant amplification of the field due to the excitation of gap plasmons. The amplification of the electric field increases with decreasing distance between the surfaces and reaches saturation, leading to record high field intensity exceeding the incident wave intensity by ten orders of magnitude. The discovered gap plasmon modes will enhance the sensitivity of detecting small concentrations of molecules, down to single molecules, using giant Raman scattering of light and plasmon-enhanced IR spectroscopy.
QUANTUM ELECTRONICS
(2021)
Editorial Material
Optics
Gregory Barbillon
Article
Physics, Applied
Andrey K. Sarychev, Andrey Ivanov, Andrey N. Lagarkov, Ilya Ryzhikov, Konstantin Afanasev, Igor Bykov, Gregory Barbillon, Nikita Bakholdin, Mikhail Mikhailov, Alexander Smyk, Alexander Shurygin, Alexander Shalygin
Summary: This study presents the design and fabrication of metal-dielectric metasurfaces, as well as their application in the excitation of plasmons and surface-enhanced Raman scattering. By utilizing the periodic arrangement of metal nanogratings on a dielectric substrate, an open plasmon resonator is formed, leading to the enhancement of the local electromagnetic field at optical frequencies.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Analytical
Andrey K. Sarychev, Alyona Sukhanova, Andrey Ivanov, Igor Bykov, Nikita Bakholdin, Daria V. Vasina, Vladimir A. Gushchin, Artem P. Tkachuk, Galina Nifontova, Pavel S. Samokhvalov, Alexander Karaulov, Igor Nabiev
Summary: This study presents a method for ultrasensitive detection of viral protein antigens using surface-enhanced Raman scattering (SERS) spectroscopy. By engineering a metal-dielectric nano-cavity and coating it with a nanometer-thick silver shell, the Raman spectra of protein samples smaller than 1 pg can be recorded. This allows for label-free detection of viral antigens at physiologically relevant levels with high sensitivity.
Article
Optics
Gregory Barbillon
Summary: This study presents a research on the sensing of chemical molecules using Au nanoparticles coated ZnO film by employing the photo-induced enhanced Raman scattering (PIERS) coupled to the surface-enhanced Raman scattering (SERS). The aim of coupling the PIERS to classical SERS is to achieve high sensitivity of detection. The detection of thiophenol showed a limit concentration of 100 pM, an adsorption capacity (K-Ads) of 3.2 x 10(6) M-1 and an analytical enhancement factor of 1.9 x 10(10).
Review
Biochemistry & Molecular Biology
Gregory Barbillon
Summary: Metasurfaces have the ability to confine electromagnetic fields on large surfaces and zones, making them suitable for applications in biochemical sensing, photocatalysis, etc. They enhance the effects of SERS and SEIRA sensing by the presence of hotspots and confined optical modes within their structures, as well as by supporting resonances at frequencies of the excitation and emission processes. Additionally, Metasurfaces enhance the absorption capacity of solar light and generate more catalytic active sites for faster surface reactions.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Gregory Barbillon, Christophe Humbert, Maria Ujue Gonzalez, Jose Miguel Garcia-Martin
Summary: In this study, we investigated chemical sensing using surface-enhanced Raman scattering with gold nanocolumn templates. The glancing angle deposition with magnetron sputtering technique was chosen for its low-cost production and ease of implementation. The fabricated gold nanocolumnar structures allowed for the production of a high density of strongly confined electric field spots. The vertical and tilted nanocolumnar templates showed promising results for the detection and adsorption of thiophenol molecules.
Review
Physics, Applied
Alemayehu Nana Koya, Marco Romanelli, Joel Kuttruff, Nils Henriksson, Andrei Stefancu, Gustavo Grinblat, Aitor De Andres, Fritz Schnur, Mirko Vanzan, Margherita Marsili, Mahfujur Rahaman, Alba Viejo Rodriguez, Tlek Tapani, Haifeng Lin, Bereket Dalga Dana, Jingquan Lin, Gregory Barbillon, Remo Proietti Zaccaria, Daniele Brida, Deep Jariwala, Laszlo Veisz, Emiliano Cortes, Stefano Corni, Denis Garoli, Nicolo Maccaferri
Summary: In the past twenty years, significant progress has been made in understanding light-driven phenomena in nanoscale systems, while exploring the temporal dynamics of excited states remains a challenge. Ultrafast plasmonics, which focuses on tailoring and controlling optical and electronic processes at the nanoscale, offers great potential for applications such as optical switching and photochemical reactions. This review provides an overview of the field, discussing methodologies for monitoring and controlling nanoscale phenomena with plasmons, and highlighting recent advances in plasmon-driven chemistry and multifunctional plasmonics.
APPLIED PHYSICS REVIEWS
(2023)
Article
Chemistry, Physical
Gregory Barbillon
Summary: This study investigates the Fermi level shifts of gold nanospheres on zinc oxide (ZnO) film upon UV irradiation. The shifts are obtained by recording the extinction spectra of gold nanospheres and are attributed to the additional electrons stored in the nanospheres from ZnO film. The blueshift of plasmon resonance of the Au nanospheres indicates the transfer of electrons from ZnO film to Au nanospheres upon UV irradiation. The Fermi level shifts vary with UV irradiation time and can be estimated by a model based on the electronic structure of a semiconductor.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Andrey K. Sarychev, Gregory Barbillon, Andrey Ivanov
Summary: This study presents generic, analytical equations for the localized plasmons in a narrow gap between a metal/dielectric cylinder and a metal surface. The electric field distribution in the nanogap is obtained using the quasi-static approximation. The maximum electric field is achieved when the incident light is in resonance with the plasmon mode in the gap, and can be significantly enhanced. The analytical model results are in good agreement with a known theoretical model and experimental results of surface-enhanced Raman scattering (SERS). The narrow gap resonator appears to be a powerful and flexible tool for various spectroscopies such as SERS and infrared absorption.
APPLIED SCIENCES-BASEL
(2023)
