Single-particle Plasmon-resonance Spectroscopy and Transformation Optics Applications in Nanoplasmonics

2012 ◽  
Author(s):  
Dangyuan Lei
Keyword(s):  
Plasmon Resonance ◽  
Single Particle ◽  
Transformation Optics ◽  
Resonance Spectroscopy ◽  
Particle Plasmon

Single-particle plasmon resonance spectroscopy of phase transition in vanadium dioxide

2010 ◽  
Vol 35 (23) ◽  
pp. 3988 ◽  
Author(s):  
Dang Yuan Lei ◽  
Kannatassen Appavoo ◽  
Yannick Sonnefraud ◽  
Richard F. Haglund, Jr. ◽  
Stefan A. Maier
Keyword(s):  
Phase Transition ◽  
Plasmon Resonance ◽  
Single Particle ◽  
Vanadium Dioxide ◽  
Resonance Spectroscopy ◽  
Particle Plasmon

A single particle plasmon resonance study of 3D conical nanoantennas

Nanoscale ◽  
2013 ◽  
Vol 5 (17) ◽  
pp. 7861 ◽  
Author(s):  
Christian Schäfer ◽  
Dominik A. Gollmer ◽  
Andreas Horrer ◽  
Julia Fulmes ◽  
Alexander Weber-Bargioni ◽  
...  
Keyword(s):  
Plasmon Resonance ◽  
Single Particle ◽  
Particle Plasmon

scholarly journals Optical Characterization of Ultra-Thin Films of Azo-Dye-Doped Polymers Using Ellipsometry and Surface Plasmon Resonance Spectroscopy

Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 41
Author(s):  
Najat Andam ◽  
Siham Refki ◽  
Hidekazu Ishitobi ◽  
Yasushi Inouye ◽  
Zouheir Sekkat
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Spectroscopic Ellipsometry ◽  
Plasmon Resonance ◽  
Complex Refractive Index ◽  
Resonance Spectroscopy ◽  
Doped Polymers

The determination of optical constants (i.e., real and imaginary parts of the complex refractive index (nc) and thickness (d)) of ultrathin films is often required in photonics. It may be done by using, for example, surface plasmon resonance (SPR) spectroscopy combined with either profilometry or atomic force microscopy (AFM). SPR yields the optical thickness (i.e., the product of nc and d) of the film, while profilometry and AFM yield its thickness, thereby allowing for the separate determination of nc and d. In this paper, we use SPR and profilometry to determine the complex refractive index of very thin (i.e., 58 nm) films of dye-doped polymers at different dye/polymer concentrations (a feature which constitutes the originality of this work), and we compare the SPR results with those obtained by using spectroscopic ellipsometry measurements performed on the same samples. To determine the optical properties of our film samples by ellipsometry, we used, for the theoretical fits to experimental data, Bruggeman’s effective medium model for the dye/polymer, assumed as a composite material, and the Lorentz model for dye absorption. We found an excellent agreement between the results obtained by SPR and ellipsometry, confirming that SPR is appropriate for measuring the optical properties of very thin coatings at a single light frequency, given that it is simpler in operation and data analysis than spectroscopic ellipsometry.

Single Particle Plasmon Spectroscopy of Silver Nanowires and Gold Nanorods

Nano Letters ◽  
2008 ◽  
Vol 8 (10) ◽  
pp. 3200-3204 ◽  
Author(s):  
Moussa NʼGom ◽  
Jan Ringnalda ◽  
John F. Mansfield ◽  
Ashish Agarwal ◽  
Nicholas Kotov ◽  
...  
Keyword(s):  
Gold Nanorods ◽  
Single Particle ◽  
Silver Nanowires ◽  
Particle Plasmon

scholarly journals Lectins at Interfaces—An Atomic Force Microscopy and Multi-Parameter-Surface Plasmon Resonance Study

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2348 ◽  
Author(s):  
Katrin Niegelhell ◽  
Thomas Ganner ◽  
Harald Plank ◽  
Evelyn Jantscher-Krenn ◽  
Stefan Spirk
Keyword(s):  
Atomic Force Microscopy ◽  
Surface Plasmon Resonance ◽  
Protein Adsorption ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Resonance Spectroscopy ◽  
Carbohydrate Binding ◽  
Force Microscopy ◽  
Atomic Force ◽  
Slow Kinetics

Lectins are a diverse class of carbohydrate binding proteins with pivotal roles in cell communication and signaling in many (patho)physiologic processes in the human body, making them promising targets in drug development, for instance, in cancer or infectious diseases. Other applications of lectins employ their ability to recognize specific glycan epitopes in biosensors and glycan microarrays. While a lot of research has focused on lectin interaction with specific carbohydrates, the interaction potential of lectins with different types of surfaces has not been addressed extensively. Here, we screen the interaction of two specific plant lectins, Concanavalin A and Ulex Europaeus Agglutinin-I with different nanoscopic thin films. As a control, the same experiments were performed with Bovine Serum Albumin, a widely used marker for non-specific protein adsorption. In order to test the preferred type of interaction during adsorption, hydrophobic, hydrophilic and charged polymer films were explored, such as polystyrene, cellulose, N,-N,-N-trimethylchitosan chloride and gold, and characterized in terms of wettability, surface free energy, zeta potential and morphology. Atomic force microscopy images of surfaces after protein adsorption correlated very well with the observed mass of adsorbed protein. Surface plasmon resonance spectroscopy studies revealed low adsorbed amounts and slow kinetics for all of the investigated proteins for hydrophilic surfaces, making those resistant to non-specific interactions. As a consequence, they may serve as favorable supports for biosensors, since the use of blocking agents is not necessary.

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