Relevant bibliographies by topics / Au nanoshells

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Au nanoshells'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Au nanoshells.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Au nanoshells"

1

Liu, C. H., A. Yella, B. Q. Li, and K. Bandyopadhyay. "Measurement of Light Attenuation in Phantom Tissue Embedded with Gold Nanoshells." Advanced Materials Research 647 (January 2013): 232–38. http://dx.doi.org/10.4028/www.scientific.net/amr.647.232.

Full text
Abstract:
Light attenuation in phantom tissue embedded with gold nanoshells is measured using a photospectrometer with an integrated sphere system. Gold nanoshells are synthesized and a paste is made by mixing them with agar (or phantom tissue); from which slab samples of different nanoshell concentrations and thicknesses are prepared. Light attenuation is measured as a function of light exciting frequencies, nanoshell concentrations and tissue thickness. The nanoshell particle concentrations are determined by matching the Mie solution for a single nanoshell with the measured attenuation coefficient at the local surface plasma resonance frequency. For the range of the concentrations studied, light attenuation is linearly dependent on the nanoshell concentration, and thus the rule of independent scattering/absorption is observed. The frequency of exciting light strongly affects light attenuation in a nanoshell-populated medium, with the largest attenuation occurring at the local surface plasma resonance frequency of the nanoshells, which is consistent with theoretical predictions. For the measured samples of phantom tissue populated with nanoshells, the optical thickness is about ~8 mm.
APA, Harvard, Vancouver, ISO, and other styles
2

Liu, C. H., and B. Q. Li. "Energy Absorption in Gold Nanoshells." Journal of Nano Research 23 (July 2013): 74–82. http://dx.doi.org/10.4028/www.scientific.net/jnanor.23.74.

Full text
Abstract:
A modeling study on energy absorption and transport in an isolated nanoshell and aggregates of nanoshells under localized surface plasma resonance (SPR) conditions is presented. A comprehensive model for multi-scattering of electromagnetic waves by a cluster of multilayered nanoshells is developed, which applies the Wigner-Eckart theorem for the calculation of the total scattering cross sessions of nanoshell aggregates. Absorption by an isolated nanoshell and by nanoshell clusters is studied using the model. Results show that the inter-nanoshell coupling results in strong field enhancement near the particle surface. Energy absorption in a nanoshell can be tuned by varying the structural parameters of the nanoshell. Smaller particles are more absorbing than the large ones, other conditions being equal. Because of the presence of a dielectric cavity, the radial distribution of the absorbed power in the metal shell may differ from the classical skin depth phenomena. The interaction among particles in close proximity causes the energy absorption efficiency and the resonance position of a nanoshell cluster to differ from those of an isolated nanoshell.
APA, Harvard, Vancouver, ISO, and other styles
3

Yang, Qinyou, Zailin Yang, Yong Yang, Guowei Zhang, and Yu Zhang. "Mechanical properties of single crystal copper ellipsoidal nanoshells by molecular dynamics." International Journal of Modern Physics B 32, no. 16 (2018): 1850196. http://dx.doi.org/10.1142/s0217979218501965.

Full text
Abstract:
Single crystal copper ellipsoidal nanoshells under outer normal tensile loadings are investigated by the molecular dynamics method. Normal stress and Mises stress are introduced to describe the mechanical properties. The uniform thickness nanoshells, the variable thickness nanoshells and the variable radius nanoshells are simulated to elucidate the effect of thickness on yielding behaviors and other mechanical properties. Potential energies, stresses and dislocations of nanoshells are discussed in the paper. The dislocations of these nanoshells form an octagon or that with an external quadrangle. The variable thickness nanoshells break this shape slightly. The potential energies of nanoshells have stable stages and then increase. The outer normal stresses and Mises stresses of different models differ from eath other. The thickness of nanoshells affects the elastic stage and the variable thickness nanoshell has different mechanical properties with others. When the radiuses of nanoshells with the same thickness are different, their dislocation shapes are the pressed octagon. Thier normal yield stresses are different, but their Mises yield stress are same. Also, the outer shape determines the trend of curves. The structure of a sphere is steadier than that of an ellipsoid.
APA, Harvard, Vancouver, ISO, and other styles
4

LEE, JIN HYOUNG, and WOUNJHANG PARK. "THREE-DIMENSIONAL METALLIC PHOTONIC CRYSTAL BASED ON SELF-ASSEMBLED GOLD NANOSHELLS." Functional Materials Letters 01, no. 01 (2008): 65–69. http://dx.doi.org/10.1142/s1793604708000125.

Full text
Abstract:
Three-dimensional metallic photonic crystal is fabricated by self-assembly of gold nanoshells. In order to fabricate highly ordered crystal structure, fabrication parameters such as silica coating thickness, the zeta potential and the concentration of gold nanoshells are carefully controlled and optimized. Highly ordered gold nanoshell opal is fabricated and its structural and optical properties are presented.
APA, Harvard, Vancouver, ISO, and other styles
5

Zhang, Peng Fei, and Pei Hong Cheng. "Investigation of Plasmon Resonances of Ag Nanoshells for Sensing Applications." Advanced Materials Research 463-464 (February 2012): 1459–62. http://dx.doi.org/10.4028/www.scientific.net/amr.463-464.1459.

Full text
Abstract:
Sensing with metal nanostructures is one of the most promising applications of nanoplasmonic devices. This paper demonstrated the theoretical simulation studies on the localized surface plasmon (LSP) of Ag nanoshells with a core diameter of 20 nm and 50 nm. The refractive index-sensing properties, such as sensitive band locations of the Ag nanoshells and sensitive spectral features as a function of nanoshell thickness, are investigated. It is found that the thicker Ag nanoshells show higher sensitivity, but the higher-order LSP resonance modes and wide extinction spectra band degrade its response. The optimum thickness is concluded to be 10nm with a sensitivity of 370nm/RIU.
APA, Harvard, Vancouver, ISO, and other styles
6

Wang, Yan Qing, Yun Fei Liu, and T. H. Yang. "Nonlinear Thermo-Electro-Mechanical Vibration of Functionally Graded Piezoelectric Nanoshells on Winkler–Pasternak Foundations Via Nonlocal Donnell’s Nonlinear Shell Theory." International Journal of Structural Stability and Dynamics 19, no. 09 (2019): 1950100. http://dx.doi.org/10.1142/s0219455419501001.

Full text
Abstract:
The thermo-electro-mechanical nonlinear vibration of circular cylindrical nanoshells on the Winkler–Pasternak foundation is investigated. The nanoshell is made of functionally graded piezoelectric material (FGPM), which is simulated by the nonlocal elasticity theory and Donnell’s nonlinear shell theory. The Hamilton’s principle is employed to derive the nonlinear governing equations and corresponding boundary conditions. Then, the Galerkin’s method is used to obtain the nonlinear Duffing equation, to which an approximate analytical solution is obtained by the multiple scales method. The results reveal that the system exhibits hardening-spring behavior. External applied voltage and temperature change have significant effect on the nonlinear vibration of the FGPM nanoshells. Moreover, the effect of power-law index on the nonlinear vibration of the FGPM nanoshells depends on parameters such as the external applied voltage, temperature change and properties of the Winkler–Pasternak foundation.
APA, Harvard, Vancouver, ISO, and other styles
7

Wu, Han, Haizeng Song, Zixia Lin, Shancheng Yan, and Yi Shi. "Preparation of SnO Nanoshells with Enhanced Lithium-Storage Properties." Journal of Nanoscience and Nanotechnology 20, no. 3 (2020): 1832–37. http://dx.doi.org/10.1166/jnn.2020.17131.

Full text
Abstract:
Tin monoxide is a kind of IV–VI metal monoxides that has attracted great deal of attention due to its wide optical band gap and high field effect mobility in the past decade. On the other hand, nanoshell is a unique porous structure. Its curved shell provides a shelter for the hollow core, as well as a much bigger special surface area. We in this study systematically prepared SnO nanoshells through a facile self-assembly method under different annealing conditions. The lithium ion batteries were fabricated immediately based on the as prepared nanoshells. The capacity of as fabricated lithium ion batteries was 559.3 mAhg-1 at rate performance of 0.1 Ag-1 and 497.5 mAhg-1 at 1 Ag-1 in 30th cycle. This work exhibited high application performance of SnO nanoshells. We hope this work will help study similar structure and applications of IV–VI metal monoxides.
APA, Harvard, Vancouver, ISO, and other styles
8

Nika, Denis, Evghenii Pokatilov, Vladimir Fomin, Josef Devreese, and Jacques Tempere. "Resonant Terahertz Light Absorption by Virtue of Tunable Hybrid Interface Phonon–Plasmon Modes in Semiconductor Nanoshells." Applied Sciences 9, no. 7 (2019): 1442. http://dx.doi.org/10.3390/app9071442.

Full text
Abstract:
Metallic nanoshells have proven to be particularly versatile, with applications in biomedical imaging and surface-enhanced Raman spectroscopy. Here, we theoretically demonstrate that hybrid phonon-plasmon modes in semiconductor nanoshells offer similar advantages in the terahertz regime. We show that, depending on tm,n,nhe doping of the semiconductor shells, terahertz light absorption in these nanostructures can be resonantly enhanced due to the strong coupling between interface plasmons and phonons. A threefold to fourfold increase in the absorption peak intensity was achieved at specific values of electron concentration. Doping, as well as adapting the nanoshell radius, allowed for fine-tuning of the absorption peak frequencies.
APA, Harvard, Vancouver, ISO, and other styles
9

Zhang, Xing Fang, and Feng Shou Liu. "Multipolar Surface Plasmon Peaks in Gold Nanoshells." Applied Mechanics and Materials 730 (January 2015): 137–40. http://dx.doi.org/10.4028/www.scientific.net/amm.730.137.

Full text
Abstract:
The intensities of the dipole, quadrupole and octupole modes for gold nanoshells have been investigated with various dielectric constants for the embedding medium and with various sizes of the nanoshells by means of Mie theory. With the increase in the dielectric constant of embedding medium, it is found that the intensities of all modes become stronger first, and then the higher mode starts to become weak. We also observe with decreasing the core size of a nanoshell with a fixed outer radius, a larger dielectric constant for the embedding medium is needed corresponding to the change of higher mode intensities from stronger to weaker. We have ascribed the changes of the dipole, quadrupole and octupole modes to the competition among the variations of induced surface charges, conduction electrons and oscillation electrons.
APA, Harvard, Vancouver, ISO, and other styles
10

Uchida, Shuhei, Kazuya Yamamura, and Nobuyuki Zettsu. "Fabrication of Precise Asymmetric Nanoshells Array with Nanogaps for a Label-Free Immunoassay Based on NIR-Light Responsive LSPR." Key Engineering Materials 523-524 (November 2012): 680–85. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.680.

Full text
Abstract:
Localized surface plasmon resonance (LSPR) based sensors are a well established technology utilized for label-free biochemical sensing in immunoassay, medical diagnostics and environmental monitoring. The understanding of asymmetric metal nanoparticles, new object for complex, coupled plasmon systems providing localized significantly enhanced E-field, is central to a wide range of novel applications and processes in science of higher sensitive sensing systems. However, few methods are available for actual characterization of such nanostructures at the single particle level. Here we propose a precise and large sized scale fabrication technique for asymmetric nanoshells array with nanogaps of several tens of nanometers for LSPR sensor through atmospheric pressure plasma etching processes. A nanoshell was simply constructed by laminating thin Au films on periodic isolated polymer nanoparticles template. This nanoshells array was expected to exhibit specific near-infrared plasmonic properties. When measuring the sensitivity, nanoshells array exhibited a high sensitivity to changes of surrounding refractive index and showed a higher sensor figure of merit than the alternative structures. This indicated that the enhanced plasmon E-field in the asymmetric nanostructures improved sensor performance. Our fabrication technique and the optical properties of the arrays will provide useful information for developing new plasmonic applications.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Au nanoshells"

1

Comi, Troy J. "Porous Phospholipid Nanoshells as Enzymes Delivery Agents." Thesis, The University of Arizona, 2012. http://hdl.handle.net/10150/243914.

Full text
Abstract:
Diabetes is an epidemic in developed nations. Glucokinase (GK) is vital for glocose sensing, and is directly implicated in particular forms of diabetes. Studying pancreatic cells with altered GK activity would facilitate studies, but current methods for altering proteomes are lacking. Porous phospholipid nanoshells (PPNs) have traditionally been used as platforms for biologically derived nanosensors, though their biocompatibility and protease resistance well suits them as enzyme delivery agents. GK kinetics were investigated with an enzyme coupled reaction to determine the effect of encapsulation. It was determined that encapsulation increased the Hill coefficient by 5.8% and the S(0.5) by 1.8%. This small deviation may not be significant in physiological conditions. To observe a recovered function in cell lines upon reintroducing GK, constitutively expressed GK must first be knocked down with siRNA. As initial work toward an siRNA knockdown, immunoblotting conditions were optimized resulting in a detection limit below 10 ng of GK. Immunoblotting verified suspected constitutive expression of GK in INS-1 cell lines. While further investigation is necessary to demonstrate the utility of GK-containing PPNs for cell delivery, this thesis outlines the generation and characterization of this novel enzyme delivery platform.
APA, Harvard, Vancouver, ISO, and other styles
2

San, San Maw. "Synthesis of Silver Nanoshells with Controlled Thickness and Morphology." Doctoral thesis, Kyoto University, 2020. http://hdl.handle.net/2433/245847.

Full text
Abstract:
京都大学<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第22162号<br>工博第4666号<br>新制||工||1728(附属図書館)<br>京都大学大学院工学研究科化学工学専攻<br>(主査)教授 宮原 稔, 教授 山本 量一, 教授 松坂 修二<br>学位規則第4条第1項該当<br>Doctor of Philosophy (Engineering)<br>Kyoto University<br>DGAM
APA, Harvard, Vancouver, ISO, and other styles
3

Zeng, Jianbo. "Gold Nanoshells: Synthesis and Applications to In Situ SERS." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1362843561.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Van, Nostrand Joseph E. "Detection and Destruction of Escherichia Coli Bacteria and Bacteriophage Using Biofunctionalized Nanoshells." Wright State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=wright1190897606.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Ng, Vanessa. "Gold nanoshells: designing a multifunctional molecular probe for photoacoustic imaging." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=114594.

Full text
Abstract:
Atherosclerosis is a cardiovascular disease that is known to be the primary cause of heart attacks and strokes. The hard plaque that forms within the arteries can be vulnerable to rupture, causing thrombosis which can effectively obstruct the flow of blood. The identification of vulnerable plaque is directly related to the composition of the plaque itself. Current imaging methodologies do not sufficiently address the issues of identifying early stages of atherosclerosis, plaque composition and thus, lesion vulnerability. Photoacoustic imaging techniques used in conjunction with contrast enhancing nanomaterials have offered a novel approach to address these problems. This thesis presents a platform by which synthesis of a strategically designed nanoprobe combining multiple functionalities can help address these issues. The chosen nanomaterial, in particular gold nanoshells, are optically and biologically relevant substrates that can be tuned to absorb within the biological window (650-900 nm) where biological absorption interference is the lowest. The synthesis of gold nanoshells using a sacrificial cobalt nanoparticle template procedure was optimized to obtain nanoshells of approximately 40 nm in diameter and 3 nm in thickness with plasmon absorption between 650-750 nm. To further enhance the utility of gold nanoshells, additional functionalities were incorporated onto them by exploiting the well known thiol-gold bond formation. The simplicity and adaptability of the synthetic process allows for coupling to any desired functionality or functionalities into these systems. Using this methodology, two monofunctional ligands and one multifunctional ligand, possessing therapeutic (lipoic acid), additional imaging (fluorescent dyes), solubilizing (PEG) functionalities and combinations thereof, were successfully synthesized. Each of these ligands were subsequently conjugated to the gold nanoshells, creating probes that possess the optical properties of the gold nanoshells in combination with the additional ligand properties. With in vitro and in vivo studies underway, the work in this thesis covering the optimization and fabrication of these novel multivalent probes has laid a solid foundation to achieve the goal of vulnerable plaque identification.<br>L'athérosclérose est connue pour être la cause primaire des crises cardiaques et des accidents cérébraux-vasculaires. Les plaques qui se forment sur les parois des artères sont susceptibles d'éclatées causant par la suite une thrombose qui peut obstruer l'influx sanguin. L'identification de plaques vulnérables est directement liée à la composition de ces plaques. Les méthodologies actuelles d'imagerie ne sont pas assez compétentes pour identifier les stades préliminaires d'athérosclérose, la composition des plaques et, conséquemment, la susceptibilité de ceux-ci de subir des lésions. Les techniques d'imagerie photoacoustique utilisées conjointement avec des nanomatériaux agissant comme agent de contraste offrent une stratégie inédite pour résoudre ces obstacles. Cette thèse présente un projet par laquelle la synthèse stratégique d'une nano-sonde incorporant plusieurs fonctionnalités peu adresser ces problèmes. Des nano-coquilles d'or, le nanomatériau choisi, sont des substrats pertinents du point de vue de l'optique et de la biologie qui peuvent être ajustés de sorte qu'elles absorbent dans la fenêtre biologique (650-900 nm), c'est-à-dire là où l'interférence dû à l'absorption biologique est à son plus bas. La procédure de synthèse des nano-coquilles d'or utilisant un modèle sacrificiel de nanoparticules de cobalt a été optimisée pour obtenir des nano-coquilles d'approximativement 40 nm de diamètre et 3 nm d'épaisseur, avec une absorption plasmonique entre 650 et 750 nm. Pour augmenter davantage l'utilité des nano-coquilles d'or, des fonctionnalités additionnelles ont été incorporées grâce à la formation du lien thiol-or. La simplicité et l'adaptabilité du processus synthétique permet le couplage de toutes fonctionnalités désirées. Utilisant cette méthodologie, deux ligands monofonctionnels et un ligand multifonctionnel, possédant des fonctionnalités thérapeutique (acide lipoïque), d'imagerie additionnel (fluorochrome), ainsi que de solubilisation (PEG), ont été synthétisés avec succès. Chacun de ces ligands ont été par la suite conjugués aux nano-coquilles d'or, créant ainsi des sondes possédant les propriétés optiques des nano-coquilles d'or en plus des propriétés des ligands. Présentement, des études in vitro et in vivo se déroulent; le travail présenté dans cette thèse couvrant l'optimisation et la fabrication de ces sondes multivalentes inédites a établi une base solide pour atteindre l'objectif de l'identification des plaques vulnérables.
APA, Harvard, Vancouver, ISO, and other styles
6

Puvanakrishnan, Priyaveena. "Near-infrared narrow-band imaging of gold/silica nanoshells in tumors." Thesis, [Austin, Tex. : University of Texas, 2009. http://hdl.handle.net/2152/ETD-UT-2009-05-43.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Harankahage, Dulanjan Padmajith Dharmasena. "Quantum Confinement Beyond the Exciton Bhor Radius in Quantum Dot Nanoshells." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1593955468720583.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Garcia, Soto Mariano de Jesús. "Synthesis of Gold Nanostructures with Optical Properties within the Near-Infrared Window for Biomedical Applications." Diss., The University of Arizona, 2014. http://hdl.handle.net/10150/321533.

Full text
Abstract:
The work reported in this dissertation describes the design and synthesis of different gold nanoshells with strong absorption coefficients at the near-infrared region (NIR) of the spectrum, and includes preliminary studies of their use for the photo-induced heating of pancreatic cancer cells and ex vivo tissues. As the emphasis was on gold nanoshells with maximum extinctions located at 800 nm, the methods explored for their synthesis led us to the preparation of silica-core and hollow gold nanoshells of improved stability, with maximum extinctions at or beyond the targeted within the near-infrared window. The synthesis of silica-core gold nanoshells was investigated first given its relevance as one of the pioneering methods to produce gold nanostructures with strong absorption and scattering coefficients in the visible and the near-infrared regions of the spectrum. By using a classical method of synthesis, we explored the aging of the precursor materials and the effect of using higher concentrations than the customary for the reduction of gold during the shell growth. We found that the aging for one week of the as-prepared or purified precursors, namely, the gold cluster suspensions, and the seeded silica particles, along with higher concentrations of gold in the plating solution, produced fully coated nanoshells of 120 nm in size with smooth surfaces and maximum extinctions around 800 nm. Additional work carried out to reduce the time and steps in the synthesis of silica-core gold nanoshells, led us to improve the seeding step by increasing the ionic strength of the cluster suspension, and also to explore the growth of gold on tin-seeded silica nanoparticles. The synthesis of hollow gold nanoshells (HGS) of with maximum extinctions at the NIR via the galvanic replacement of silver nanoparticles for gold in solution was explored next. A first method explored led us to obtain HGS with maximum extinctions between 650 and 800 nm and sizes between 30 and 80 nm from silver nanoparticles, which were grown by the addition of silver nitrate and a mild reducer. We developed a second method that led us to obtain HGS with maximum extinctions between 750 and 950 nm by adjusting the pH of the precursor solution of the silver particles without much effort or additional steps. The last part of this work consisted in demonstrating the photo-induced heating of two biological systems containing HGS. Photothermal therapy studies of immobilized PANC1 pancreas cancer cells in well-plates were carried out with functionalized HGS. We found that cells exposed to HGS remained viable after incubation. Moreover, the cells incubated with HGS modified with mercaptoundecanoic acid and folic acid turned non-viable after being irradiated with a laser at 800 nm. The other study consisted in the laser-induced heating between 750 and 1000 nm of ex vivo tissues of chicken and pork with nanoshells injected. In comparison with non-injected tissues, it was found that the temperature at the irradiated areas with HGS increased more than 10 °C. Moreover, the extent of the heated area was broader when the laser was used at wavelengths beyond 900 nm, suggesting that the heating was due to the radiation absorbed and transformed into heat primarily by the HGS and at a lesser extent by the water in the tissue.
APA, Harvard, Vancouver, ISO, and other styles
9

Peterson, Alisha D. "Synthesis and Characterization of Novel Nanomaterials: Gold Nanoshells with Organic- Inorganic Hybrid Cores." Scholar Commons, 2010. http://scholarcommons.usf.edu/etd/3612.

Full text
Abstract:
Gold nanoshells, a material generally composed of a core of silica surrounded by a thin shell of gold, are of great interest due to their unique and tunable optical properties. By varying the shell thickness and core size, the absorption and scattering properties are greatly enhanced. The nanoshells can be made to absorb or scatter light at various regions across the electromagnetic spectrum, from visible to the near infrared. The ability to tune the optical properties of nanoshells allows for their potential use in many different areas of research such as optical imaging, tumor ablation, drug delivery, and solar energy conversion. The research in this thesis focused on the synthesis and characterization of two novel gold nanoshell materials containing thermally-responsive, organic-inorganic hybrid layers. One type of material was based on a two-layer particle with a thermally responsive hybrid core of N-isopropylacrylamide (NIPAM) copolymerized with 3-(trimethoxysilyl)propyl methacrylate (MPS) that was then coated with a thin layer of gold. The second material was a three-layer particle with a silica core, a thermally responsive copolymer of NIPAM and MPS middle layer and an outer shell of gold. Various techniques were used to characterize both materials. Transmission electron microscopy (TEM) was used to image the particles and dynamic light scattering (DLS) was used to determine particle size and the temperature response. Additionally, UV-Vis spectroscopy was used to characterize the optical properties as a function of temperature.
APA, Harvard, Vancouver, ISO, and other styles
10

Kearns, Hayleigh. "Hollow gold nanoshells as unique near infrared optical materials for surface enhanced Raman scattering." Thesis, University of Strathclyde, 2016. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=26531.

Full text
Abstract:
Hollow gold nanoshells (HGNs) demonstrate a tunable localised surface plasmon resonance (LSPR) from the visible to the near infrared (NIR). The NIR region of the electromagnetic spectrum is of particular interest as it provides an uncongested spectral window for optical analysis due to many molecules having reduced absorption and scattering backgrounds. In addition, the superior depth of light penetration and reduced interference which is observed in this region when compared to the visible region means that there is a great need to design SERS nanotags which can provide a unique vibrational fingerprint in this uncongested optical region. The research described herein demonstrates three ways in which red-shifted nanotags can be engineered to provide effective SERS signals in the NIR region. Firstly, NIR active HGNs were synthesised and encapsulated with seven non-resonant commercial Raman reporters and shown to provide effective SERS when excited with a 1064 nm laser. The nanotags were then tested using a 1280 nm laser excitation however; they were unsuccessful at providing a SERS spectrum. Through a successful collaboration with Professor Michael Detty's group (University at Buffalo) newly synthesised Raman reporters where obtained. The chalcogenopyrylium dyes were resonant from 650 to 1000 nm and when combined with HGNs, demonstrated an unprecedented performance. Through the design of these nanotags, extreme red-shifted SERS was achieved with laser excitations from 1064 nm up to 1550 nm and detection limits in the picomolar to femtomolar range where obtained. Finally, this research demonstrates that when hollow gold nanotags are functionalised with a thermopolymer such as poly(N-isopropylacrylamide), the LSPR can be shifted into the NIR region and laser induced plasmonic heating of the nanoshells can be used to turn on and off the SERS enhancement. Overall, the development of NIR active nanotags could provide the basis for future advancements in bio-chemical, medical and optical applications.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Au nanoshells"

1

Nakato, Teruyuki, Jun Kawamata, and Shinsuke Takagi, eds. Inorganic Nanosheets and Nanosheet-Based Materials. Springer Japan, 2017. http://dx.doi.org/10.1007/978-4-431-56496-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Matsusaki, Michiya, Yuri Lvov, Insung S. Choi, Insung Choi, and Sung Ho Yang. Cell Surface Engineering: Fabrication of Functional Nanoshells. Royal Society of Chemistry, The, 2014.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Burke, A., D. Carroll, Frank Torti, and S. V. Torti. Bifunctional nanomaterials for the imaging and treatment of cancer. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533060.013.13.

Full text
Abstract:
This article examines the potential of bifunctional nanomaterials for the imaging and treatment of cancer. Several nanomaterials possess properties desirable for a cancer therapy and have been the subject of research as anticancer agents. Those that have received the most attention include encapsulated iron oxides, single- and multiwalled carbon nanotubes, gold nanorods and gold nanoshells. This article first considers thermal ablative therapy incancer, focusing on the mechanisms of thermotoxicity and thermoresistance before discussing a number of nanomaterials with applications for cancer treatment. In particular, it evaluates the use of nanomaterials in thermal therapy. It also looks at gold nanoshells and nanorods, taking into account their physical properties, and concludes with an assessment of iron-oxide nanoparticles and future directions for nanomaterials as multifunctional agents for cancer therapy.
APA, Harvard, Vancouver, ISO, and other styles
4

Nanosheets [Working Title]. IntechOpen, 2019. http://dx.doi.org/10.5772/intechopen.78516.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Kong, Ling Bing. Carbon Nanomaterials Based on Graphene Nanosheets. Taylor & Francis Group, 2017.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Kong, Ling Bing. Carbon Nanomaterials Based on Graphene Nanosheets. Taylor & Francis Group, 2017.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Carbon Nanomaterials Based on Graphene Nanosheets. Taylor & Francis Group, 2016.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Kong, Ling Bing. Carbon Nanomaterials Based on Graphene Nanosheets. Taylor & Francis Group, 2017.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Kong, Ling Bing. Carbon Nanomaterials Based on Graphene Nanosheets. Taylor & Francis Group, 2017.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Deshpande, U. P., T. Shripathi, and A. V. Narlikar. Iron-oxide nanostructures with emphasis on nanowires. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533053.013.23.

Full text
Abstract:
This article examines the properties of iron-oxide nanostructures, with particular emphasis on nanowires. It begins with an overview of iron-oxide nanostructures and nanowires, followed by a discussion of the synthesis of aligned ?-Fe2O3 nanowires and nanosheets by a simple thermal oxidation route. It then describes the preferential bending of [110] grown ?-Fe2O3 nanowires about the C-axis and quantitative estimation of nanowire alignment using X-ray diffraction and grazing incidence X-ray diffraction. It also considers the growth mechanism of ?-Fe2O3 nanowires and nanosheets, different nanowire morphologies, rotational slip in ?-Fe2O3 nanosheets, and the influence of local environment and substrate microstructure on nanowire growth.
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Au nanoshells"

1

Webb, Benjamin L. J., David Holmes, Chun Li, Jin Z. Zhang, and Matthew T. Lloyd. "Hollow Gold Nanoshells." In Encyclopedia of Nanotechnology. Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_100298.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Gopalakrishnan, Srinivasan, and Saggam Narendar. "Wave Propagation in Nanoshells." In Wave Propagation in Nanostructures. Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01032-8_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Bishnoi, Sandra W., and Yujen Lin. "Multifunctionalization of Gold Nanoshells." In Methods in Molecular Biology. Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-6646-2_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ochsenkühn, Michael A., and Colin J. Campbell. "Biomedical SERS Studies Using Nanoshells." In Raman Spectroscopy for Nanomaterials Characterization. Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-20620-7_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Morton, Jennifer G., Emily S. Day, Naomi J. Halas, and Jennifer L. West. "Nanoshells for Photothermal Cancer Therapy." In Methods in Molecular Biology. Humana Press, 2010. http://dx.doi.org/10.1007/978-1-60761-609-2_7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Saliminasab, Maryam, Rostam Moradian, and Farzad Shirzaditabar. "Tunable Plasmonic Properties of Nanoshells." In Reviews in Plasmonics. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-18834-4_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Loo, Christopher, Alex Lin, Leon Hirsch, et al. "Diagnostic and Therapeutic Applications of Metal Nanoshells." In Nanofabrication Towards Biomedical Applications. Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527603476.ch12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Hirsch, Leon R., Rebekah A. Drezek, Naomi J. Halas, and Jennifer L. West. "Diagnostic and Therapeutic Applications of Metal Nanoshells." In BioMEMS and Biomedical Nanotechnology. Springer US, 2006. http://dx.doi.org/10.1007/978-0-387-25844-7_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Peña-Rodríguez, Ovidio, and Umapada Pal. "Exploiting the Tunable Optical Response of Metallic Nanoshells." In UV-VIS and Photoluminescence Spectroscopy for Nanomaterials Characterization. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-27594-4_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Sahmani, S., and M. M. Aghdam. "Nonlinear Size-Dependent Instability of Hybrid FGM Nanoshells." In Nonlinear Approaches in Engineering Applications. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-69480-1_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Au nanoshells"

1

Liu, Chang H., and Ben Q. Li. "Absorption and Scattering of the Aggregated Multi-Layered Nanoshells." In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44492.

Full text
Abstract:
A generalized mathematical formulation is presented for multi-scattering of electromagnetic fields by an ensemble consisting of arbitrarily-positioned multilayered nanoshells. The model is developed by combining the addition theorem and the efficient recursive procedure for multilayered nanoshells and general procedures for computing the multiple scattered fields and optical properties of the particle ensemble are presented. The enhancement of the electric field and the energy absorbed by the aggregated silica-gold nanoshell and gold-silica-gold nanoshells are analyzed to understand the physics governing the electromagnetic field interaction with aggregated multilayered nanoshells. The mathematical model should be helpful in providing valuable information on optical and radative transfer characteristics needed for the nanoshell-based applications in photothermal therapy, biomedical imaging, biosensing and waveguide for energy transport.
APA, Harvard, Vancouver, ISO, and other styles
2

West, Jennifer L. "Near Infrared Absorbing Nanoparticles for Photothermal Cancer Therapy." In ASME 2008 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2008. http://dx.doi.org/10.1115/sbc2008-192982.

Full text
Abstract:
Advances in nanotechnology are expected to lead to the development of new and improved therapeutic strategies, amenable to targeting, that may ultimately revolutionize cancer treatment. For example, we have developed a nanoparticle-based photothermal cancer therapy that has shown high efficacy with virtually no damage to normal tissues (Hirsch et al., 2003, O’Neal et al., 2004, Lowery et al., 2006). This therapeutic strategy employs nanoparticles called nanoshells that are designed to strongly absorb near infrared (NIR) light. Metal nanoshells are a new type of nanoparticle composed of a dielectric (for instance, silica) core coated with an ultrathin metallic (for instance, gold) layer. Gold nanoshells possess physical properties similar to gold colloid, in particular, a strong optical absorption due to the collective electronic response of the metal to light. The optical absorption of gold colloid yields a brilliant red color that has been of considerable utility in consumer-related medical products, such as home pregnancy tests. In contrast, the optical response of gold nanoshells depends dramatically on the relative size of the nanoparticle core and the thickness of the gold shell. By varying the relative core and shell thicknesses, the color of gold nanoshells can be varied across a broad range of the optical spectrum that spans the visible and the near infrared spectral regions (Oldenburg et al., 1999). Gold nanoshells can be made to either preferentially absorb or scatter light at their plasmon resonance by varying the size of the particle relative to the wavelength of the light at their optical resonance. For cancer therapy, nanoshells are injected intravenously and allowed to accumulate in tumor sites due to the leakiness of the vasculature (EPR) and/or molecular targeting. Accumulation in the tumor sites peaks after several hours, at which time the tissue region is illuminated with NIR light for several minutes. NIR light is not absorbed to a significant extent by tissue components, but is strongly absorbed by nanoshells within the tumor. This leads to rapid heating of the tumor tissue without damage to adjacent normal tissues. In preliminary studies, complete tumor regression and 100% survival with no regrowth has been achieved. Mice with CT26 colon carcinoma tumors (4 mm diameter) were injected intravenously with NIR absorbing nanoshells that were coated with PEG-SH. 6 hr following nanoshell injection, the tumor sites were illuminated with light from a 820 nm diode laser (4 W/cm2) for 4 min. Animals in a sham group received a saline injection instead of nanoshells prior to NIR treatment, while a control group was untreated. Tumor size and animal survival were then tracked. As shown in Figure 1, all tumors treated with nanoshells had completely regressed within 10 days of treatment, while sham and control tumors had grown dramatically. Furthermore, all sham and control animals died within 20 days of treatment, while all nanoshell-treated mice continue to live (+12 months) with no tumor regrowth (Figure 2, O’Neal et al., 2004). Excellent nanoshell biocompatibility has been observed.
APA, Harvard, Vancouver, ISO, and other styles
3

Hester, Brooke C., Alice Crawford, Rani B. Kishore, Kristian Helmerson, Naomi J. Halas, and Carly Levin. "Optical trapping of nanoshells." In NanoScience + Engineering, edited by Kishan Dholakia and Gabriel C. Spalding. SPIE, 2007. http://dx.doi.org/10.1117/12.735276.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Silva, Renato B., Edilson Falcão-Filho, Regivaldo Sobral-Filho, Antonio Brito-Silva, André Galembeck, and Cid B. de Araújo. "Infrared Nonlinearity of Gold Nanoshells." In Latin America Optics and Photonics Conference. OSA, 2010. http://dx.doi.org/10.1364/laop.2010.thc3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Nordlander, Peter J., and Emil Prodan. "Optical properties of metallic nanoshells." In International Symposium on Optical Science and Technology, edited by Naomi J. Halas. SPIE, 2002. http://dx.doi.org/10.1117/12.450810.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Zhu, L., A. Attaluri, N. Manuchehrabadi, et al. "Temperature Elevations in Implanted Prostatic Tumors During Laser Photothermal Therapy Using Nanorods." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53144.

Full text
Abstract:
Gold nanoshells or nanorods are newly developed nanotechnology in laser photothermal therapy for cancer treatments in recent years [1–10]. Gold nanoshells consists of a solid dielectric nanoparticle core (∼100 nm) coated by a thin gold shell (∼10 nm). Gold nanorods have a diameter of 10 nm and an aspect ratio of approximately four. Nanorods may be taken up by tumors more readily than nanoshells due to nanorods’ smaller size. By varying the geometric ratio, both nanoshells and nanorods can be tuned to have strong absorption and scattering to a specific laser wavelength. Among a wide range of laser wavelengths, the near infrared (NIR) laser at ∼800 nm is most attractive to clinicians due to its deep optical penetration in tissue. Therefore, the tissue would appear almost “transparent” to the 800 nm laser light before the laser reaches the nanoshells or nanorods in tumors, with minimal laser energy wasted by the tissue without the nanostructures. The laser energy absorbed in an area congregating by the nanostructures is transferred to the surrounding tissue by heat conduction. This approach not only achieves targeted delivery of laser energy to the tumor, but also maximally concentrates a majority of the laser energy to the tumor region.
APA, Harvard, Vancouver, ISO, and other styles
7

Yang, Huan, Jinyou Shao, and Ben Q. Li. "Self-Assembly of Ordered SiO2@Au Core-Shell Nanoparticle Arrays." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36539.

Full text
Abstract:
This paper presents a wet-based self-assembly process for nano-fabricating 1-D arrays of spherical nanoparticles and/or gold-nanoshells with controllable inter-particle distance for near infrared optical communications and for plasmon polariton waveguides featured with the lateral mode size below the optical diffraction limit. The process entails two main procedures. First, the SiO2 nanoparticle colloidal solution was restricted to flow through the gap between the patterned substrate and the cover slip, and the particles, trapped in the patterned, recessed regions, self-assembled to form closely arranged SiO2 particle arrays. These SiO2 particle arrays then acted as a template with which SiO2@Au nanoshell particle arrays of interest with desirable interparticle distance were obtained by repeating the above procedure with SiO2@Au dispersed solution. The needed high quality SiO2@Au core-shell nanoparticles with tunable surface plasma resonance also were synthesized in our laboratory using the seed-and-grow method. Results show that, with this method, the interparticle distance of the nanoshell particle arrays can be controlled by a proper selection of the patterned groove and the sizes of SiO2 and SiO2@Au nanoshell particles. As demonstrated by experiment, the method is general and can be applied to obtain nanoparticle particle arrays of other materials with controllable distance.
APA, Harvard, Vancouver, ISO, and other styles
8

Liu, Jun, Deepanjali Dattatray Gurav, Ru Zhang, and Kun Qian. "Lipidomics study using novel plasmonic nanoshells." In 2017 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale (3M-NANO). IEEE, 2017. http://dx.doi.org/10.1109/3m-nano.2017.8286305.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Hester, Brooke C., Rani B. Kishore, Kristian Helmerson, Naomi J. Halas, and Carly Levin. "Optical trapping of nanoshells near resonance." In NanoScience + Engineering, edited by Mark I. Stockman. SPIE, 2008. http://dx.doi.org/10.1117/12.795224.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Hirsch, L. R., J. L. West, J. B. Jackson, C. E. Moran, and N. J. Halas. "Metal nanoshells: a novel substrate for immunoassays." In CLEO 2001. Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Technical Digest. IEEE, 2001. http://dx.doi.org/10.1109/cleo.2001.947976.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Au nanoshells"

1

Mackay, Raymond A., Lily Giri, Shashi P. Karna, and Mark H. Griep. Galvanic Synthesis of Hollow Gold Nanoshells. Defense Technical Information Center, 2015. http://dx.doi.org/10.21236/ada621254.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Lee, Tai-Chou. Metal Nanoshells for Enhanced Solar-to-Fuel Photocatalytic Conversion. Defense Technical Information Center, 2011. http://dx.doi.org/10.21236/ada550106.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Halas, N. J., and T. R. Lee. Properties and Applications of Metal Nanoshells and their Composite Solids,. Defense Technical Information Center, 1997. http://dx.doi.org/10.21236/ada329225.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Schaak, Raymond E. Chemical Routes to Colloidal Chalcogenide Nanosheets. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1170371.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Halas, Naomi J. Multidisciplinary University Research Initiative (MURI); Nanoshell-Based Infrared and Terahertz Adaptive Materials. Defense Technical Information Center, 2006. http://dx.doi.org/10.21236/ada447237.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Marye Ann Fox and James Whitesell. Photoresponsiveness and Light Harvesting in Synthetic Nanowires, Nanosheets and Nanospheres. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/951175.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Wei, Fang. Multifunctional Virus-Nanoshell Assembly for Targeted Hyperthermia and Viral Gene Therapy for Breast Cancer. Defense Technical Information Center, 2012. http://dx.doi.org/10.21236/ada566649.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Olson, Dana. Carbon Nanosheets and Nanostructured Electrodes in Organic Photovoltaic Devices: Cooperative Research and Development Final Report, CRADA Number CRD-08-321. Office of Scientific and Technical Information (OSTI), 2012. http://dx.doi.org/10.2172/1039824.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Weinlandt, Thomas, Dan Kaplan, and Venkataraman Swaminathan. A Method to Formulate the Unit Cell for Density Functional Theory (DFT) Calculations of the Electronic Band Structure of Heterostructures of Two-dimensional Nanosheets. Defense Technical Information Center, 2015. http://dx.doi.org/10.21236/ada623945.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Au nanoshells' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography