Article
Chemistry, Multidisciplinary
Jean-Francois Bryche, Marlo Vega, Agnes Tempez, Thibault Brule, Thomas Carlier, Julien Moreau, Marc Chaigneau, Paul G. Charette, Michael Canva
Summary: This work demonstrates the enhancement in plasmonic sensing efficacy by spatially-localized functionalization on nanostructured surfaces, where probe molecules are concentrated in areas of high field concentration. SERS measurements on nanostructured surfaces with homogeneous and spatially-localized functionalization with thiophenol show that the Raman signal mainly originates from high field concentration areas. TERS measurements with 10 nm spatial resolution confirm the predicted field distribution profiles.
Article
Chemistry, Multidisciplinary
Meitong Nie, Yuming Zhao, Wonil Nam, Junyeob Song, Wenqi Zhu, Henri J. Lezec, Amit Agrawal, Wei Zhou
Summary: The research introduces nanolaminate plasmonic nanocavities on 3D vertical nanopillar arrays for broadband SERS operation with large enhancement factors. It shows uniform SERS performance and demonstrates nanoscale broadband SERS operation at the single MIM nanocavity level. Numerical studies reveal that the nanolaminate plasmonic nanocavities can support multiple hybridized plasmonic modes for concentrating optical fields across a broadband wavelength range.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Raul D. Rodriguez, Carlos J. Villagomez, Amirhassan Khodadadi, Stephan Kupfer, Andrey Averkiev, Lina Dedelaite, Feng Tang, Mohammad Y. Khaywah, Vladimir Kolchuzhin, Arunas Ramanavicius, Pierre-Michel Adam, Stefanie Graefe, Evgeniya Sheremet
Summary: The interaction of light with metal nanostructures results in strong amplification and localization of electromagnetic fields. In SERS, signal amplification is mainly attributed to electromagnetic enhancement, while the role of chemical enhancement is still debated. Changes in spectral features can be due to different mechanisms, such as molecular orientation and electric field gradient, in addition to chemical enhancement.
Review
Chemistry, Analytical
Irene Calderon, Luca Guerrini, Ramon A. Alvarez-Puebla
Summary: Surface-enhanced Raman spectroscopy (SERS) combines nanotechnology with traditional Raman spectroscopy to create an ultra-sensitive and highly specific analytical tool, utilized in various advanced applications such as biosensing platforms for nucleic acids (NAs) and precision engineering of nanomaterials using structural DNA nanotechnology.
Review
Oncology
Luca Guerrini, Eduardo Garcia-Rico, Ana O'Loghlen, Vincenzo Giannini, Ramon A. Alvarez-Puebla
Summary: Exosomes serve as important cancer biomarkers, while nanoplasmonic methods incorporating surface-enhanced Raman spectroscopy technique have become effective tools for detecting and discriminating exosomes. The main challenge lies in achieving rapid, sensitive, and cost-effective analysis of exosomes.
Article
Biotechnology & Applied Microbiology
Sihai Luo, Junjie Zhang, John C. de Mello
Summary: This study demonstrates the use of thin gold films patterned with nanogaps for the sensitive detection of micro- and nano-plastics. The detection and identification of these contaminants is critical for monitoring their spread and effects in the environment.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Review
Chemistry, Analytical
Chenyu Dong, Yifan Wang, Xiaoyan Zhao, Jie Bian, Weihua Zhang
Summary: Nanostructures and nanomaterials, especially plasmonic nanostructures, have unique optical properties that can manipulate light and enhance light-matter interactions. They have diverse applications in chemical sensing and analysis, improving sensor sensitivity and simplifying instrument design.
Article
Chemistry, Multidisciplinary
Hajir Hilal, Mohammadnavid Haddadnezhad, Myeong Jin Oh, Insub Jung, Sungho Park
Summary: Elongated pseudohollow nanoframes composed of four rectangular plates enclosing the sides and two open-frame ends with four ridges pointing at the tips for near-field focusing are reported. The nanoframes are hollow inside, allowing the gaseous analyte to penetrate through the entire architecture and enabling efficient detection of gaseous analytes when combined with Raman spectroscopy. The significant enhancement in SERS is attributed to the presence of a flat solid terrace for a large surface area, sharp edges and vertices for strong electromagnetic near-field collection, and open frames for effective analyte transport and capture.
Article
Nanoscience & Nanotechnology
Yanlin Mi, Yinzhou Yan, Mengyuan Wang, Lixue Yang, Jing He, Yijian Jiang
Summary: Researchers have reported a novel hybrid SERS substrate composed of a large microsphere and a small microsphere array with Ag nanoparticles. The cascaded structure allows for increased molecular concentration, enhanced intensity of excitation light, and giant Raman enhancement.
Article
Materials Science, Multidisciplinary
Shuangshuang Wang, Jiacheng Yao, Xiaolin Lu, Tao Ding
Summary: This study demonstrates a method of light-induced protrusion of gold nanowires (AuNWs) from a solid state substrate, which enables the on-chip fabrication of functional nanodevices. By irradiating gold ion-doped titanium dioxide (TiO2) films with a laser, AuNWs are grown and their morphology can be tuned by irradiation time/power and ion concentration. Nanopillars can also be generated by introducing Au seeds. The surface-enhanced Raman scattering performance of the AuNW bundles is excellent.
ADVANCED OPTICAL MATERIALS
(2022)
Review
Chemistry, Analytical
Anna Lipovka, Maxim Fatkullin, Andrey Averkiev, Marina Pavlova, Anurag Adiraju, Saddam Weheabby, Ammar Al-Hamry, Olfa Kanoun, Igor Pasti, Tamara Lazarevic-Pasti, Raul D. Rodriguez, Evgeniya Sheremet
Summary: This review article critically discusses the synergetic combinations of optical and electrochemical methods, with a focus on three key application fields - energy, biomedicine, and environment. The article selects the most promising approaches and examples, and discusses the open challenges in sensing as well as ways to overcome them. The work aims to provide a clear reference for developing and understanding strategies, pros and cons of different combinations of electrochemical and optical sensors integrated into a single device.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Gary Sean Cooney, David Talaga, Vicky Ury-Thiery, Yann Fichou, Yuhan Huang, Sophie Lecomte, Sebastien Bonhommeau
Summary: In this study, TERS was used to visualize the spatial distribution of adenine, protein secondary structure, and amino acids in single polyadenosine-induced tau fibrils. The findings provide insights into the incorporation of the polyadenosine cofactor in the fibril structure and its interaction with amino acids. TERS proves to be a powerful technique for studying cofactors in individual tau fibrils and their mode of interaction.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Robin R. Jones, Cornelia Miksch, Hyunah Kwon, Coosje Pothoven, Kristina R. Rusimova, Maarten Kamp, Kedong Gong, Liwu Zhang, Tim Batten, Brian Smith, Alejandro V. Silhanek, Peer Fischer, Daniel Wolverson, Ventsislav K. Valev
Summary: Against the backdrop of current healthcare and climate emergencies, surface enhanced Raman scattering (SERS) is gaining popularity as a technique for identifying and fingerprinting molecules in various substances. Researchers have investigated plasmonic nanohelices and found that they possess excellent SERS properties. These nanohelices can be produced at a low cost, exhibit strong and uniform Raman enhancement effects, and are anticipated to have broad applications in surface enhanced Raman spectroscopies and material science.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jessi E. S. van der Hoeven, Harith Gurunarayanan, Maarten Bransen, D. A. Matthijs de Winter, Petra E. de Jongh, Alfons van Blaaderen
Summary: The study introduces a new type of functional assembly called supraparticles, which are formed by the solvent-driven assembly of silica-coated gold nanorods into spherical ensembles. The plasmonic coupling and mass transport are controlled by adjusting the thickness and porosity of the silica shells. These novel materials have the potential to play an important role in sensing applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Parmeet Dhindsa, David Solti, Christian R. Jacobson, Anvy Kuriakose, Gopal Narmada Naidu, Aaron Bayles, Yigao Yuan, Peter Nordlander, Naomi J. Halas
Summary: This study provides direct insight into the role of catalyst molecular structure in controlling the morphology of aluminum nanocrystals (Al NCs) by systematically modifying the catalyst molecular structure.