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| Author | : Yong-Tae Kim |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2018* |
| Genre | : |
| ISBN | : |
Nanostructures; Anodized aluminum oxide; Electrochemical deposition; Plasmonics; Surface-enhanced Raman spectroscopy
| Author | : Claire Margaret Cobley |
| Publisher | : |
| Total Pages | : 154 |
| Release | : 2010 |
| Genre | : Electronic dissertations |
| ISBN | : |
This research centers around techniques to engineer the properties of noble-metal nanostructures for applications in surface-enhanced Raman spectroscopy (SERS) and biomedicine. Many of these potential applications are made possible by the strong localized surface plasmon resonance (LSPR) of noble-metal nanostructures, which is heavily influenced by the particle's morphology. The first part of this work focuses on the solution-phase synthesis of Ag nanostructures. In this section, I demonstrate the synthesis of Ag nanostructures with two different morphologies that are interesting for fundamental SERS studies: anisotropically truncated octahedrons and large, single-crystalline spheres. In both syntheses, control over etching was critical to morphological control. The second part of this work discusses galvanic replacement reactions, which can be used to create a variety of hollow, porous nanostructures whose LSPR can be tuned into the near infrared region, a spectral range particularly interesting for biomedical applications due to reduced light attenuation in soft tissue. In this section, I will describe how the nanostructures resulting from galvanic replacement reactions can be engineered by controlling the morphology of the Ag nanostructures used as templates or the metal salt(s) titrated during the reaction. Specifically, I will discuss how the use of template particles with non-uniform surfaces influences the final morphology and how the progression of a galvanic replacement reaction using two different precursors (e.g. HAuCl4 and Na2PdC14) depends strongly on the order that they are added. In the final part of this work, I will discuss the biocompatibility of Au-Ag nanocages with different compositions and surface coatings and their use in two biomedical imaging techniques: as contrast agents in photoacoustic mapping of sentinel lymph nodes and as novel three-photon luminescence probes for in vitro imaging.
| Author | : Caixia Kan |
| Publisher | : John Wiley & Sons |
| Total Pages | : 469 |
| Release | : 2024-02-13 |
| Genre | : Technology & Engineering |
| ISBN | : 3527840842 |
Firsthand insights on a unique class of optoelectronic materials, covering technologies and applications in catalysis, sensing, and spectroscopy Plasmonic Metal Nanostructures provides broad coverage of the field of plasmonic technologies, from fundamentals to real-world applications such as highly sensitive spectroscopy and surface analysis techniques, summarizing the recent progress in plasmonics and their applications, with a focus on comprehensive and authoritative discussions of fabrication and characterization of the materials and their technological uses. The text also addresses current trends and advances in materials for plasmonics, such as nanostructures with novel shapes, composite nanostructures, and thin films. Starting with an overview of optical properties in materials from macro- to micro- and nanoscale, the text then moves on to discuss the fundamentals and dielectric modifications and advanced characterization methods of plasmonic nanostructures. Next, the latest development of metal nanostructures, such as core-shell and porous nanorods, nanowires for conductive films, new star-like nanoplates, different open nanostructures, and metal-semiconductor composite nanostructures, are explained in detail. The final portion of the text discusses applications of plasmonics for semiconductor optoelectronic devices, catalysis, sensing, SERS (surface-enhanced Raman Spectroscopy), and energy. Written by a highly qualified academic, Plasmonic Metal Nanostructures covers sample topics such as: Drude model for free electron gas, dielectric function of the free electron gas, surface plasmon polaritons, plasmon at metal-vacuum interface, and surface plasmon effects Drude-Lorentz model of metal nanoparticles, dielectric properties of complex nanostructures, optical property analysis of isolated nanoparticles, and numerical simulation of optical properties One-dimensional Au nanostructures, core-shell nanostructures, alloy Au/Ag nanorods, porous nanorods, and yolk-shell nanostructures FCC nanoplates, Au nanoplates with novel and well-defined shapes, metal decorated semiconductors, and optical properties of Au NBP-embedded nanostructures Providing complete coverage of plasmonic nanostructures and their applications in catalysis, sensing, spectroscopy, thin-film, analysis, optoelectronics, and a variety of other fields. The book about Plasmonic Metal Nanostructures is an essential resource for materials scientists, physics researchers and photochemists, along with catalytic, biomedical, and physical chemists.
| Author | : Challa S.S.R. Kumar |
| Publisher | : Springer Science & Business Media |
| Total Pages | : 659 |
| Release | : 2012-03-30 |
| Genre | : Technology & Engineering |
| ISBN | : 3642206204 |
First volume of a 40-volume series on nanoscience and nanotechnology, edited by the renowned scientist Challa S.S.R. Kumar. This handbook gives a comprehensive overview about Raman spectroscopy for the characterization of nanomaterials. Modern applications and state-of-the-art techniques are covered and make this volume essential reading for research scientists in academia and industry.
| Author | : Ricardo Aroca |
| Publisher | : John Wiley & Sons |
| Total Pages | : 260 |
| Release | : 2006-05-01 |
| Genre | : Science |
| ISBN | : 9780470035658 |
Surface Enhanced Vibrational Spectroscopy (SEVS) has reached maturity as an analytical technique, but until now there has been no single work that describes the theory and experiments of SEVS. This book combines the two important techniques of surface-enhanced Raman scattering (SERS) and surface-enhanced infrared (SEIR) into one text that serves as the definitive resource on SEVS. Discusses both the theory and the applications of SEVS and provides an up-to-date study of the state of the art Offers interpretations of SEVS spectra for practicing analysts Discusses interpretation of SEVS spectra, which can often be very different to the non-enhanced spectrum - aids the practicing analyst
| Author | : Cosmin Farcau |
| Publisher | : GRIN Verlag |
| Total Pages | : 154 |
| Release | : 2015-03-03 |
| Genre | : Science |
| ISBN | : 3656911215 |
Doctoral Thesis / Dissertation from the year 2008 in the subject Physics - Optics, Babeș-Bolyai Universit, language: English, abstract: Ordered plasmonic nanostructures are currently the subject of numerous scientific studies, due to their potential applications, from optical communications to chemical analyses and biomedicine. This thesis is focused on a special type of periodically ordered two-dimensional (2D) metallo-dielectric structure, noble metal films over microsphere arrays: from their fabrication and characterization, to spectroscopic applications. Prepared structures exhibit remarkable optical properties (including an unusually high transmittance, resembling the extraordinary optical transmission phenomenon), resulting from the excitation of surface plasmons. It is demonstrated that these plasmo-photonic structures are very promising multifunctional active-substrates for Surface Enhanced Raman Scattering, Metal Enhanced Fluorescence, and Surface Plasmon Resonance Spectroscopy. Chapter 1 is devoted to giving an overview of the interesting aspects related to the optical properties and applications of periodically structured metals and dielectrics. We also briefly describe some of the currently developed nanofabrication techniques. A few concepts, like the photonic band and surface plasmon are introduced, being useful for the discussions in the upcoming chapters. We pay a special attention to colloidal photonic crystal films and noble metal structures obtained by templating on two-dimensional colloidal crystals. Chapter 2 presents own experimental results concerning the preparation, characterization and lithographic applications of two-dimensional (2D) colloidal crystal films. Results of the optical properties investigations are presented in Chapter 3, and divided in two main categories: i) photonic properties of bare microsphere arrays, and ii) plasmonic properties of noble metal nanostructured films deposited over microsphere arrays. In Chapter 4 we explore the capabilities of noble metal coated microsphere arrays to improve the sensitivity of optical spectroscopic methods: Surface Enhanced Raman Scattering, Metal Enhanced Fluorescence, and Surface Plasmon Resonance Spectroscopy.
| Author | : Luis Liz-Marzán |
| Publisher | : CRC Press |
| Total Pages | : 911 |
| Release | : 2020-04-23 |
| Genre | : Medical |
| ISBN | : 1000020967 |
Noble metal nanoparticles have attracted enormous scientific and technological interest because of their unique optical properties, which are related to surface plasmon resonances. The interest in nanosized metal particles dates back to ancient societies, when metals were used in various forms as decorative elements. From the famous Lycurgus cup, made by the Romans in the 4th century AD, through thousands of stained glasses in churches and cathedrals all over medieval Europe, bright-yellow, green, or red colors have been obtained by a touch of metallic additions during glass blowing. This peculiar interaction of light with nanometals can be widely tuned through the morphology and assembly of nanoparticles, thereby expanding the range of potential applications, from energy and information storage to biomedicine, including novel diagnostic and therapeutic methods. This book compiles recent developments that clearly illustrate the state of the art in this cutting-edge research field. It comprises different review articles written by the teams of Prof. Luis Liz-Marzán, an international leader in chemical nanotechnology who has made seminal contributions to the use of colloid chemistry methods to understand and tailor the growth of metal particles at the nanoscale. Apart from synthesis, the book also describes in detail the plasmonic properties of nanomaterials and illustrates some representative applications. This book will appeal to anyone involved in nanotechnology, nanocrystal growth, nanoplasmonics, and surface-enhanced spectroscopies.
| Author | : Gustavo Morari Do Nascimento |
| Publisher | : BoD – Books on Demand |
| Total Pages | : 326 |
| Release | : 2018-04-18 |
| Genre | : Science |
| ISBN | : 1789230004 |
This book gives a wide overview of the state-of-the-art applications of Raman spectroscopy in characterization of materials and biomaterials. The Raman signal is intrinsically smaller than other vibrational techniques; however, mainly through intensification processes, such as resonance Raman (RR) and surface-enhanced Raman spectroscopy (SERS), the Raman cross section can be strongly amplified. Thoroughly in these signal amplifications, the study of a diversity of chemical systems and the use of Raman technique for in situ and in vivo measurements is possible. The main goal of this book is to open up to an extended audience the possibilities of uses of Raman spectroscopy. In fact, this collective work will be beneficial to students, teachers, and researchers of many areas who are interested to expand their knowledge about Raman spectroscopy applied to nanotechnology, biotechnology, environmental science, inorganic chemistry, and health sciences.
| Author | : Sebastian Schlücker |
| Publisher | : John Wiley & Sons |
| Total Pages | : 97 |
| Release | : 2011-09-19 |
| Genre | : Science |
| ISBN | : 3527633065 |
Covering everything from the basic theoretical and practical knowledge to new exciting developments in the field with a focus on analytical and life science applications, this monograph shows how to apply surface-enhanced Raman scattering (SERS) for solving real world problems. From the contents: * Theory and practice of SERS * Analytical applications * SERS combined with other analytical techniques * Biophysical applications * Life science applications including various microscopies Aimed at analytical, surface and medicinal chemists, spectroscopists, biophysicists and materials scientists. Includes a Foreword by the renowned Raman spectroscopist Professor Wolfgang Kiefer, the former Editor-in-Chief of the Journal of Raman Spectroscopy.
| Author | : Ruiqian Jiang |
| Publisher | : |
| Total Pages | : 58 |
| Release | : 2014 |
| Genre | : |
| ISBN | : |
In the last three decades, a large number of different plasmonic nanostructures have attracted much attention due to their unique optical properties. Those plasmonic nanostructures include nanoparticles, nanoholes and metal nanovoids. They have been widely utilized in optical devices and sensors. When the plasmonic nanostructures interact with the electromagnetic wave and their surface plasmon frequency match with the light frequency, the electrons in plasmonic nanostructures will resonate with the same oscillation as incident light. In this case, the plasmonic nanostructures can absorb light and enhance the light scattering. Therefore, the plasmonic nanostructures can be used as substrate for surface-enhanced Raman spectroscopy to enhance the Raman signal. Using plasmonic nanostructures can significantly enhance Raman scattering of molecules with very low concentrations. In this thesis, two different plasmonic nanostructures Ag dendrites and Au/Ag core-shell nanoparticles are investigated. Simple methods were used to produce these two plasmonic nanostructures. Then, their applications in surface enhanced Raman scattering have been explored. Ag dendrites were produced by galvanic replacement reaction, which was conducted using Ag nitrate aqueous solution and copper metal. Metal copper layer was deposited at the bottom side of anodic aluminum oxide (AAO) membrane. Silver wires formed inside AAO channels connected Ag nitrate on the top of AAO membrane and copper layer at the bottom side of AAO. Silver dendrites were formed on the top side of AAO. The second plasmonic nanostructure is Au/Ag core-shell nanoparticles. They were fabricated by electroless plating (galvanic replacement) reaction in a silver plating solution. First, electrochemically evolved hydrogen bubbles were used as template through electroless deposition to produce hollow Au nanoparticles. Then, the Au nanoparticles were coated with Cu shells in a Cu plating solution. In the following step, a AgCN based plating solution was used to replace Cu shell to form Au/Ag core-shell nanoparticles. These two plasmonic nanostructures were tested as substrates for Raman spectroscopy. It demonstrated that these plasmonic nanostructures could enhance Raman signal from the molecules on their surface. The results indicate that these plasmonic nanostructures could be utilized in many fields, such as such as biological and environmental sensors.
