Download or read book Nanogap Embedded Silver Gratings for Surface Plasmon Enhanced Fluorescence written by Kunal Bhatnagar and published by . This book was released on 2012 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasmonic nanostructures have been extensively used in the past few decades for applications in sub-wavelength optics, data storage, optoelectronic circuits, microscopy and bio-photonics. The enhanced electric field produced within a few hundred nanometers of these surfaces can be used to excite fluorophores in the surrounding environment. Fluorescence based bio-detection and bio-imaging are two of the most important tools in the life sciences and improving the qualities and capabilities of fluorescence based detectors and imaging equipment remains a big challenge for industry manufacturers. We report a novel fabrication technique for producing nano-gap embedded periodic grating substrates on the nanoscale using a store bought HD-DVD and conventional soft lithography procedures. Polymethylsilsesquioxane (PMSSQ) polymer is used as the ink for the micro-contact printing process with PDMS stamps obtained from the inexpensive HD-DVDs as master molds. Fluorescence enhancement factors of up to 118 times were observed with these silver nanostructures in conjugation with Rhodamine-590 fluorescent dye. These substrates are ideal candidates for a robust and inexpensive optical system with applications such as low-level fluorescence based analyte detection, single molecule imaging, and surface enhanced Raman studies.
Download or read book Optics for Materials Scientists written by Myeongkyu Lee and published by CRC Press. This book was released on 2019-07-16 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new volume will help materials scientists and engineers fully comprehend the principles of optics and optical phenomena and effectively utilize them for the design and fabrication of optical materials and devices. Materials science is an interdisciplinary field at the intersection of various fields, such as metallurgy, ceramics, solid-state physics, chemistry, chemical engineering, and mechanical engineering. Thus, many physicists, chemists, and engineers also work in materials science. Many materials scientists generally do not have a strong background in optics, and this book aims to fill that gap. The volume explains the fundamentals of optics legibly to nonspecialists and presents theoretical treatments for a variety of optical phenomena resulting from light-matter interactions. It covers thin film optics, interference lithography, and metal plasmonics as practical applications of optics for materials research. Each chapter of the book has a problem and reference section to facilitate the reader’s understanding. The book is aimed at assisting materials scientists and engineers who must be aware of optics and optical phenomena. This book will also be useful as a textbook for students in materials science, physics, chemistry, and engineering throughout their undergraduate and early graduate years.
Download or read book Localized Surface Plasmon Resonance Spectroscopy of Gold and Silver Nanoparticles and Plasmon Enhanced Flurescence written by Elizabeth Anne Vokac and published by . This book was released on 2011 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents spectroscopic studies of metallic nanoparticle localized surface plasmons and plasmon enhanced fluorescence. We investigated the dielectric sensitivity of silver nanoprisms to an external electric field and gold nanorods to the formation of a self-assembled surface monolayer. Dark field microscopy was used to image plasmonic scattering from single nanoparticles, and a liquid crystal tunable filter was used to construct corresponding spectra. The plasmon resonances of silver nanoprisms displayed both reversible red shifts and irreversible blue shifts along with drastic intensity changes upon exposure to an applied bias. The plasmon resonances of gold nanorods showed sensitivity to the presence of alkanethiol molecules adhered to the particle surface by a moderate red shift. An increase in the effective external dielectric caused a shift toward longer wavelengths. We imaged plasmon enhanced fluorescence in order to optimize experimental parameters for a developing project that can characterize nanoparticle structure on sub-wavelength dimensions. Preliminary controls were performed to account for the effect of O2 plasma treatment, solvent and alkanethiol monolayer formation on surface plasmon resonances. We found that O2 plasma treatment for different time intervals did not result in a plasmon shift compared to untreated nanoparticles exposed to N2; however when exposed to solvent the surface plasmons of the treated particles shifted five times as far toward the red. Interestingly, the solvent effect only resulted in a plasmon shift when the particles were N2 dried after solvent incubation. Gold nanorods incubated in ethanol showed no wavelength maximum shift in pure solvent over time, but shifted moderately to the red after incubation in a solution of alkanethiol molecules. Conditions for the plasmon enhanced fluorescence study were optimized using a dye conjugate of the same alkanethiol molecule used previously by formation from solution in a monolayer on the gold nanorod surface. The appropriate synthesis for dye functionalization, molecular concentrations, solvents and optical settings were determined.
Download or read book Influence of Silver Nanoparticles on Fluorescence Enhancement written by Sai Bharanisrikanth Toleti and published by . This book was released on 2016 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this project, we studied the influence of silver nanoparticles (AgNP) on the fluorescence properties over glass substrates and on Nano pours oxide film substrates. Enhanced fluorescence intensities were observed due to presence of AgNP in near field to a fluorophore creating hot spots thereby proving the concepts of Metal Enhanced Fluorescence and Surface Plasmon Resonance (SPR). A Bragg reflector pattern is created by varying the refractive index of surface resulting in layered structure causing the light getting trapped in between the layers which exhibited the properties of SPR and Evanescent fields. The mean intensity values were higher for the AgNP introduced glass samples compared to the controls, which provided an evidence of Fluorescence Enhancement. This property may be useful for designing new analytical tools that can be used for single molecule detection in the fields of bio sensing and bio imaging.
Download or read book Metal Enhanced Fluorescence written by Chris D. Geddes and published by John Wiley & Sons. This book was released on 2010-06-22 with total page 655 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discover how metal-enhanced fluorescence is changing traditional concepts of fluorescence This book collects and analyzes all the current trends, opinions, and emerging hot topics in the field of metal-enhanced fluorescence (MEF). Readers learn how this emerging technology enhances the utility of current fluorescence-based approaches. For example, MEF can be used to better detect and track specific molecules that may be present in very low quantities in either clinical samples or biological systems. Author Chris Geddes, a noted pioneer in the field, not only explains the fundamentals of metal-enhanced fluorescence, but also the significance of all the most recent findings and models in the field. Metal-enhanced fluorescence refers to the use of metal colloids and nanoscale metallic particles in fluorescence systems. It offers researchers the opportunity to modify the basic properties of fluorophores in both near- and far-field fluorescence formats. Benefits of metal-enhanced fluorescence compared to traditional fluorescence include: Increased efficiency of fluorescence emission Increased detection sensitivity Protect against fluorophore photobleaching Applicability to almost any molecule, including both intrinsic and extrinsic chromophores Following a discussion of the principles and fundamentals, the author examines the process and applications of metal-enhanced fluorescence. Throughout the book, references lead to the primary literature, facilitating in-depth investigations into particular topics. Guiding readers from the basics to state-of-the-technology applications, this book is recommended for all chemists, physicists, and biomedical engineers working in the field of fluorescence.
Download or read book Surface Plasmon Nanophotonics written by Mark L. Brongersma and published by Springer. This book was released on 2007-09-18 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses a new class of photonic devices, known as surface plasmon nanophotonic structures. The book highlights several exciting new discoveries, while providing a clear discussion of the underlying physics, the nanofabrication issues, and the materials considerations involved in designing plasmonic devices with new functionality. Chapters written by the leaders in the field of plasmonics provide a solid background to each topic.
Download or read book Nanostructure Design written by Ehud Gazit and published by Springer Science & Business Media. This book was released on 2008-08-05 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: As one of the fastest growing fields of research in the 21st century, nanotechnology is sure to have an enormous impact on many aspects of our lives. Nanostructure Design: Methods and Protocols serves as a major reference for theoretical and experimental considerations in the design of biological and bio-inspired building blocks, the physical characterization of the formed structures, and the development of their technical applications. The chapters contributed by leading experts are divided into two sections, the first of which covers experimental aspects of nanostructure design and the second delves into computational methods. As a volume of the highly successful Methods in Molecular BiologyTM series, this collection pulls together cutting-edge protocols, written in a step-by-step, readily reproducible format certain to guide researchers to the desired results. Comprehensive and essential, Nanostructure Design: Methods and Protocols uses biological principles and vehicles on design to aid scientists in the great challenges still ahead.
Download or read book Radiative Decay Engineering written by Chris D. Geddes and published by Springer Science & Business Media. This book was released on 2007-12-11 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: During recent years our enthusiasm for this field has continually increased. This book presents expert contributions describing the fundamental principles for the widespread use of radiative decay engineering in the biological sciences and nanotechnology.
Download or read book Optical Antennas written by Mario Agio and published by Cambridge University Press. This book was released on 2013-01-03 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: This consistent and systematic review of recent advances in optical antenna theory and practice brings together leading experts in the fields of electrical engineering, nano-optics and nano-photonics, physical chemistry and nanofabrication. Fundamental concepts and functionalities relevant to optical antennas are explained, together with key principles for optical antenna modelling, design and characterisation. Recognising the tremendous potential of this technology, practical applications are also outlined. Presenting a clear translation of the concepts of radio antenna design, near-field optics and field-enhanced spectroscopy into optical antennas, this interdisciplinary book is an indispensable resource for researchers and graduate students in engineering, optics and photonics, physics and chemistry.
Download or read book Quantum Plasmonics written by Sergey I. Bozhevolnyi and published by Springer. This book was released on 2016-11-26 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the latest results of quantum properties of light in the nanostructured environment supporting surface plasmons, including waveguide quantum electrodynamics, quantum emitters, strong-coupling phenomena and lasing in plasmonic structures. Different approaches are described for controlling the emission and propagation of light with extreme light confinement and field enhancement provided by surface plasmons. Recent progress is reviewed in both experimental and theoretical investigations within quantum plasmonics, elucidating the fundamental physical phenomena involved and discussing the realization of quantum-controlled devices, including single-photon sources, transistors and ultra-compact circuitry at the nanoscale.
Download or read book Surface Enhanced Vibrational Spectroscopy written by Ricardo Aroca and published by John Wiley & Sons. This book was released on 2006-05-01 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Optical Nanotechnologies written by Junji Tominaga and published by Springer Science & Business Media. This book was released on 2003-06-13 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book treats the phenomena and techniques of advanced optics confined in nanometer-scale regions, especially near-field optics and surface as well as local plasmons. Written by internationally distinguished scientists the coverage extends from the basics to the most advanced technologies, system characteristics and methods of manipulation.
Download or read book Molecular Sensors and Nanodevices written by John X. J. Zhang and published by Academic Press. This book was released on 2018-11-19 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular Sensors and Nanodevices: Principles, Designs and Applications in Biomedical Engineering, Second Edition is designed to be used as a foundational text, aimed at graduates, advanced undergraduates, early-career engineers and clinicians. The book presents the essential principles of molecular sensors, including theories, fabrication techniques and reviews. In addition, important devices and recently, highly-cited research outcomes are also cited. This differentiates the book from other titles on the market whose primary focus is more research-oriented and aimed at more of a niche market. Covers the fundamental principles of device engineering and molecular sensing, sensor theories and applications in biomedical science and engineering Introduces nano/micro fabrication techniques, including MEMS, bioMEMS, microTAS and nanomaterials science that are essential in the miniaturization of versatile molecular sensors Explores applications of nanomaterials and biomaterials, including proteins, DNAs, nanoparticles, quantum dots, nanotubes/wires and graphene in biomedicine
Download or read book Metal Nanoparticles and Clusters written by Francis Leonard Deepak and published by Springer. This book was released on 2017-11-17 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the continually expanding field of metal nanoparticles and clusters, in particular their size-dependent properties and quantum phenomena. The approaches to the organization of atoms that form clusters and nanoparticles have been advancing rapidly in recent times. These advancements are described through a combination of experimental and computational approaches and are covered in detail by the authors. Recent highlights of the various emerging properties and applications ranging from plasmonics to catalysis are showcased.
Download or read book New Frontiers in Photochromism written by Masahiro Irie and published by Springer Science & Business Media. This book was released on 2013-05-27 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photochromism is the reversible phototransformation of a chemical species between two forms having different absorption spectra. During the phototransformation not only the absorption spectra but also various physicochemical properties change, such as the refractive index, dielectric constant, oxidation/reduction potential, and geometrical structure. The property changes can be applied to photonic equipment such as erasable memory media, photo-optical switch components, and display devices. This book compiles the accomplishments of the research project titled “New Frontiers in Photochromism” supported by the Ministry of Education, Culture, Sports, Science and Technology of Japan. The project focused not only on the above-mentioned classical subjects in photochromism, such as color changes, optical memory, and optical switches, but also on fundamental physicochemical studies and unprecedented application fields that have not yet been explored in photochromism. The latter topics include light-driven mechanical motion, photocontrol of surface wettability, metal deposition on solid materials, photocontrol of chiral properties, ultrafast decoloration dyes, and femtosecond laser experiments, among others.
Download or read book Near Field Optics and Surface Plasmon Polaritons written by Satoshi Kawata and published by Springer Science & Business Media. This book was released on 2003-07-01 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers not only near-field optical microscopy but also wider fields such as local spectroscopy, nano-scale optical processing, quantum near-field optics, and atom manipulation.
Download or read book Nanoplasmonic Sensors written by Alexandre Dmitriev and published by Springer Science & Business Media. This book was released on 2012-07-31 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a compendium of the finest research in nanoplasmonic sensing done around the world in the last decade. It describes basic theoretical considerations of nanoplasmons in the dielectric environment, gives examples of the multitude of applications of nanoplasmonics in biomedical and chemical sensing, and provides an overview of future trends in optical and non-optical nanoplasmonic sensing. Specifically, readers are guided through both the fundamentals and the latest research in the two major fields nanoplasmonic sensing is applied to – bio- and chemo-sensing – then given the state-of-the-art recipes used in nanoplasmonic sensing research.
