scholarly journals Evolution and Tailoring of DUV Plasmonic Properties in Al Nanoparticle Arrays by UV Irradiation

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Yanyue Ding ◽  
Jian Chen ◽  
Gan Xu ◽  
Fei Liu ◽  
Min Han
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Ultraviolet Irradiation ◽  
Near Field ◽  
Surface Oxidation ◽  
Blue Shift ◽  
Nanoparticle Arrays ◽  
Plasmon Band ◽  
Resonance Band

Ultraviolet irradiation was used to tailor the surface plasmon band of the densely distributed aluminium nanoparticle arrays fabricated by gas-phase deposition. We showed that the broad surface plasmon resonance band of the as-prepared sample could be tuned to a sharp and strong resonance band in the deep ultraviolet optical range, with a large blue shift of the peak wavelength. The evolution of the surface plasmon resonance properties was attributed to the ultraviolet irradiation-improved surface oxidation of the nanoparticles, which eliminated the near-field couplings between the closely spaced nanoparticles by increasing their interspacing.

scholarly journals Optical Response of Ag-Au Bimetallic Nanoparticles to Electron Storage in Aqueous Medium

2008 ◽  
Vol 8 (6) ◽  
pp. 3003-3007 ◽  
Author(s):  
Ilknur Tunc ◽  
Haci Osman Guvenc ◽  
Hikmet Sezen ◽  
Sefik Suzer ◽  
Miguel A. Correa-Duarte ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Spectral Shift ◽  
Surface Plasmon Resonance Band ◽  
Pure Gold ◽  
Plasmon Band ◽  
Electron Storage ◽  
Plasmon Resonance Band ◽  
Resonance Band

Composition and structure dependence of the shift in the position of the surface plasmon resonance band upon introduction of NaBH4 to aqueous solutions of gold and silver nanoparticles are presented. Silver and gold nanoalloys in different compositions were prepared by co-reduction of the corresponding salt mixtures using sodium citrate as the reducing agent. After addition of NaBH4 to the resultant nanoalloys, the maximum of their surface plasmon resonance band, ranging between that of pure silver (ca. 400 nm) and of pure gold (ca. 530 nm), is blue-shifted as a result of electron storage on the particles. The extent of this blue shift increases non-linearly with the mole fraction of silver in the nanoparticle, parallel to the trends reported previously for both the frequency and the extinction coefficient of the plasmon band shifts. Gold(core)@silver(shell) nanoparticles were prepared by sequential reduction of gold and silver, where addition of NaBH4 results in relatively large spectral shift in the plasmon resonance band when compared with the nanoalloys having a similar overall composition. The origin of the large plasmon band shift in the core–shell is related with a higher silver surface concentration on these particles. Hence, the chemical nature of the nanoparticle emerges as the dominating factor contributing to the extent of the spectral shift as a result of electron storage in bimetallic systems.

Improved near field lithography by surface plasmon resonance in groove-patterned masks

2009 ◽  
Vol 11 (12) ◽  
pp. 125003 ◽  
Author(s):  
Beibei Zeng ◽  
Li Pan ◽  
Ling Liu ◽  
Liang Fang ◽  
Changtao Wang ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Near Field

scholarly journals Physical process-aided fabrication of periodic Au–M (M = Ag, Cu, Ag–Cu) alloyed nanoparticle arrays with tunable localized surface plasmon resonance and diffraction peaks

RSC Advances ◽  
2018 ◽  
Vol 8 (17) ◽  
pp. 9134-9140 ◽  
Author(s):  
Honghua Zhang ◽  
Chu Wang ◽  
Huilin Li ◽  
Longfa Jiang ◽  
Dandan Men ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Physical Process ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Size Composition ◽  
Localized Surface Plasmon ◽  
Nanoparticle Arrays ◽  
Diffraction Peaks ◽  
Controllable Size

An interesting and facile physical route is proposed to fabricate multi-elemental alloyed nanoparticle arrays with controllable size, composition and periodicity.

Localized surface plasmon resonance shift and its application in scanning near-field optical microscopy

2021 ◽  
Author(s):  
Jiawei Zhang ◽  
Gitanjali Kolhatkar ◽  
Andreas Ruediger
Keyword(s):  
Raman Spectroscopy ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Near Field ◽  
Localized Surface Plasmon ◽  
Resonance Shift ◽  
Raman Modes ◽  
Tip Enhanced Raman Spectroscopy

The localized surface plasmon resonance (LSPR) position in tip-enhanced Raman spectroscopy (TERS) is of great importance to the understanding and interpretation of the relative intensity of different enhanced Raman modes....

Analysis of Localized Surface Plasmon Resonance in Ag/ITO/CdS/SiO2 Multilayered Nanostructured Composite

NANO ◽  
2015 ◽  
Vol 10 (08) ◽  
pp. 1550117
Author(s):  
Chao Liu ◽  
Jingwei Lv ◽  
Famei Wang ◽  
Qiang Liu ◽  
Haiwei Mu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Surrounding Medium ◽  
Blue Shift ◽  
Red Shift ◽  
Localized Surface Plasmon ◽  
Extinction Spectra

Multilayered nanoshells have attracted much attention due to their unique optical, electronic and magnetic properties. In this work, numerical calculation using discrete dipole approximation (DDA) is conducted to investigate the quad-layered metal nanoshell consisting of a particle with a dielectric silica (SiO2) core, inner cadium sulfide (CdS) shell, middle indium tin oxide (ITO) shell and outer metal silver (Ag) shell. The phenomenon is interpreted by plasmon hybridization theory and the Ag–ITO–CdS–SiO2 multilayered nanoshells are studied by extinction spectra of localized surface plasmon resonance. The variation in the spectrum peak with nanoparticle thickness and refractive index of the surrounding medium is derived. The electric field enhancement contour around the nanoparticles under illumination is analyzed at the plasmon resonance wavelength. The [Formula: see text], [Formula: see text], and [Formula: see text] modes red-shift with the refractive index of the surrounding medium and increase in the layer thickness causes either blue-shift or red-shift as shown by the extinction spectra. The mechanism of the red-shift or blue-shift is discussed. The [Formula: see text] mode blue-shifts and furthermore, the [Formula: see text] and [Formula: see text] modes of the Ag coated multilayered nanostructure are noticeable by comparing the extinction efficiency spectra of the Au–ITO–CdS–SiO2 and Ag–ITO–CdS–SiO2 multilayered nanoshells.

scholarly journals Investigation of the Influence of the Molecular Weight of Polyethyleneglycols on the Optical Properties and Dispersed Characteristics of Sols of Au Nanoparticles used in Medicine

2021 ◽  
pp. 268-280
Author(s):  
Abdul-Fattah Visirkhazhievich Ibragimov ◽  
Iman Ibragimovna Magomadova ◽  
Maryana Vyacheslavovna Teberdieva ◽  
Seda Alievna Ferzauli ◽  
Tamila Muslimovna Dolaeva ◽  
...  
Keyword(s):  
Optical Properties ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Optical Density ◽  
Plasmon Resonance ◽  
Hydrodynamic Radius ◽  
Au Nanoparticles ◽  
Plasmon Resonance Band ◽  
Resonance Band ◽  
Peg 8000

In this work, the synthesis of Au nanoparticles stabilized with polyethyleneglycols with different molecular weights from 200 to 8000 Da was carried out. The synthesis was carried out by the method of chemical reduction in an aqueous medium using sodium citrate as a reducing agent. The dependence of the optical properties on the concentration and molar mass of polyethyleneglycol was studied in the obtained samples of Au nanoparticles. The absorption spectra were recorded using an SF-56 optical spectrometer. The studies were carried out in the visible range of the spectrum from 400 to 800 nm. It was found that the type of spectrum, the position of the surface plasmon resonance band and the optical density of the samples of Au nanoparticles stabilized with PEG-8000 with a concentration of 10 and 20% did not undergo significant changes during storage, which characterizes the high aggregate stability of these sols. The dispersed characteristics of these samples of sols of Au nanoparticles were also studied. The studies were carried out using photon-correlation spectroscopy by the method of dynamic light scattering. It is established that an increase in the concentration of the stabilizer leads to an increase in the average hydrodynamic radius of the particles. This fact is associated with an increase in the thickness of the stabilizer layer and with the "stitching" of the polymer layer of Au nanoparticles with the formation of aggregates. Thus, the best result was found in PEG-8000 samples with concentrations of 10 and 20%, since the type of spectrum, the position of the surface plasmon resonance band and the optical density did not undergo significant changes. Based on the data obtained, it can be concluded that the best stabilizer for Au nanoparticles obtained by the citrate method is PEG-8000 with a concentration of at least 10 %. It is important to note that with an increase in the concentration of the stabilizer, the average hydrodynamic radius of the particles increases. This fact is associated with an increase in the thickness of the stabilizer layer and with the "stitching" of Au nanoparticles.

scholarly journals Surface plasmon resonance “hot spots” and near-field enhanced spectroscopy at interfaces

2019 ◽  
Vol 68 (14) ◽  
pp. 147801
Author(s):  
Shi-Liang Feng ◽  
Jing-Yu Wang ◽  
Shu Chen ◽  
Ling-Yan Meng ◽  
Shao-Xin Shen ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Hot Spots ◽  
Near Field
Sign in / Sign up

Export Citation Format

Share Document