scholarly journals Photochemical Printing of Plasmonically Active Silver Nanostructures

2020 ◽  
Vol 21 (6) ◽  
pp. 2006 ◽  
Author(s):  
Marcin Szalkowski ◽  
Karolina Sulowska ◽  
Martin Jönsson-Niedziółka ◽  
Kamil Wiwatowski ◽  
Joanna Niedziółka-Jönsson ◽  
...  
Keyword(s):  
Glass Substrate ◽  
Silver Nanostructures ◽  
Photoluminescence Intensity ◽  
Plasmonic Resonance ◽  
Photochemical Reduction ◽  
Pronounced Increase ◽  
On Demand ◽  
Emission Enhancement ◽  
Anti Stokes ◽  
Silver Compounds

In this paper, we demonstrate plasmonic substrates prepared on demand, using a straightforward technique, based on laser-induced photochemical reduction of silver compounds on a glass substrate. Importantly, the presented technique does not impose any restrictions regarding the shape and length of the metallic pattern. Plasmonic interactions have been probed using both Stokes and anti-Stokes types of emitters that served as photoluminescence probes. For both cases, we observed a pronounced increase of the photoluminescence intensity for emitters deposited on silver patterns. By studying the absorption and emission dynamics, we identified the mechanisms responsible for emission enhancement and the position of the plasmonic resonance.

LSPR-mediated improved upconversion emission on randomly distributed gold nanoparticles array

2020 ◽  
Vol 44 (45) ◽  
pp. 19672-19682
Author(s):  
S. P. Tiwari ◽  
A. Kumar ◽  
K. Kumar ◽  
M. R. Singh ◽  
G. P. Bharti ◽  
...  
Keyword(s):  
Thin Film ◽  
Gold Nanoparticles ◽  
Glass Substrate ◽  
Silica Glass ◽  
Upconversion Emission ◽  
Plasmonic Resonance ◽  
Emission Enhancement ◽  
Au Thin Film

The Au thin film was fabricated on silica glass substrate (a) and UCNPs were fabricated over (a) to get the plasmonic resonance (image b) with the coupling of metal. The UC emission enhancement after confinement of metal and NPs were simulated (c).

New Transparent Substrate with Silica Aerogel Film for Surface-Emissive Devices

2000 ◽  
Vol 660 ◽  
Author(s):  
H. Yokogawa ◽  
K. Kawano ◽  
M. Yokoyama ◽  
T. Tsutsui ◽  
M. Yahiro ◽  
...  
Keyword(s):  
Refractive Index ◽  
Glass Substrate ◽  
Silica Aerogel ◽  
Sol Gel ◽  
Supercritical Drying ◽  
Transparent Electrode ◽  
Light Sources ◽  
Photoluminescence Intensity ◽  
Transparent Substrate ◽  
Low Refractive Index

ABSTRACTSilica aerogels prepared by sol-gel methods with supercritical drying process have transparency and extremely low refractive index which is not available in any other materials. This extraordinary refractivity is expected to present some new features as an optical material. Ordinarily, coupling-out efficiency of surface-emissive light sources has been assumed to be low. It is due to the losses organized from internal reflection of emitted light at the air-glass interface and dissipation during wave-guiding propagation within the substrate.However, when material that has extremely low refractive index is inserted between a thin luminescence layer and glass substrate, almost all the light from the luminescence layer can efficiently couple out to air passing through the glass substrate. In this report, we introduce a silica aerogel film as a low refractive index material for surface-emissive devices, such as photoluminescent and electroluminescent device. In the experiments, the photoluminescence intensity of Alq3 through the silica aerogel layer was twice as large as that of the glass substrate without the silica aerogel film. Moreover, we formed a new substrate which contained a transparent electrode on the silica aerogel film. Using this substrate, we fabricated the OLED and observed the disappearance of wave-guiding propagation within the glass substrate.

scholarly journals Peroxides and Bisphenols Detection in Extra Virgin Olive Oil (EVOO) by Plasmonic Nanodomes Transducers

Chemosensors ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 83
Author(s):  
Adriano Colombelli ◽  
Daniela Lospinoso ◽  
Maria Grazia Manera ◽  
Roberto Rella
Keyword(s):  
Olive Oil ◽  
Glass Substrate ◽  
Virgin Olive Oil ◽  
Qualitative Evaluation ◽  
Extra Virgin Olive Oil ◽  
Morphological Characterization ◽  
Optical Behaviour ◽  
Plasmonic Resonance ◽  
Large Area ◽  
Array Configuration

Large-area nanostructured transducer for absorption opto-plasmonic measurements in the ultraviolet visible UV-VIS spectral range have been realized by colloidal lithography. The design and simulation performed guarantee the optical behaviour of the nanostructured transducers. Morphological characterization by AFM microscopy evidences the nanodome structure of the object realized in array configuration. A microfluidic device was optimized to perform measurements in real time. Qualitative evaluation of the peroxides’ and bisphenols’ concentration in extra virgin olive oil (EVOO) have been obtained by following the variation in the plasmonic resonance monitoring of a suitable array nanodome structure deposited onto a glass substrate. Comparison of the obtained results with laboratory-standard methodologies gives us guaranteed support of the potential of the realized technology.

Synthesis of Silver Nanostructures and their Application in Highly Sensitive SERS Sensors

2017 ◽  
Vol 68 (1) ◽  
pp. 98 ◽  
Author(s):  
Alok Kumar Srivastava ◽  
Punam Awasthi ◽  
Sanjay Kanojia ◽  
N. S. Neeraj ◽  
Pankaj Sharma ◽  
...  
Keyword(s):  
Glass Substrate ◽  
Signal Enhancement ◽  
Silver Nanostructures ◽  
Sers Substrates ◽  
Highly Sensitive ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Biowarfare Agent ◽  
Enhanced Raman Scattering ◽  
Chemical Synthesis Route

<p class="p1">A comparison of Surface Enhanced Raman Scattering (SERS) activity of chemically synthesised silver nanostructures with different shapes is reported. The silver nanostructures of cubical, prism and wire like morphology were synthesised using chemical synthesis route and utilised as SERS substrates. The sensors were fabricated by spin coating these materials over a Silicon or glass substrate. The fabricated sensors were used to analyse response with two different analytes, 4-Mercaptobenzoic acid and Rhodamine 6G under different concentrations. The signal enhancement was compared with a silver coated thin film over glass substrate and it was observed that the enhancement of the order of 10<span class="s1"><sup>3 </sup></span>is achieved. The nanowire performed better than the other forms of silver and gave a higher signal enhancement for all the analytes as compared to other nanostructures. The fabricated sensors may be useful for various applications including explosive and biowarfare agent detection.</p>

Fine resolution drop-on-demand electrohydrodynamic patterning of conductive silver tracks on glass substrate

2012 ◽  
Vol 111 (2) ◽  
pp. 593-600 ◽  
Author(s):  
Khalid Rahman ◽  
Kamran Ali ◽  
Nauman M. Muhammad ◽  
Myung-taek Hyun ◽  
Kyung-hyun Choi
Keyword(s):  
Glass Substrate ◽  
On Demand ◽  
Drop On Demand ◽  
Electrohydrodynamic Patterning ◽  
Fine Resolution

scholarly journals Enhanced Photoluminescence of Tb3+ Ions Ce3+ Ions and SnO2 Nanocrystals Co-doped Silica Thin Films

2021 ◽  
Author(s):  
Xin Zhang ◽  
Feng Guo ◽  
Li Zhuang ◽  
Qinghui Jin ◽  
Xiaowei Zhang
Keyword(s):  
Thin Films ◽  
Annealing Temperature ◽  
Photoluminescence Intensity ◽  
Co Doping ◽  
Enhanced Photoluminescence ◽  
Sno2 Nanocrystals ◽  
Silica Thin Films ◽  
Emission Enhancement ◽  
Doping Ratio ◽  
Co Doped

Abstract Co-doping Ce3+ ions and size-tunable SnO2 nanocrystals into Tb3+ ions embedded silica thin films produces a ninefold enhancement of Tb3+ related emission. Firstly, by optimizing the doping ratio of Sn4+ ions, the size of SnO2 nanoparticles was well tailored for achieving a greatly enhanced photoluminescence emission from Tb3+ ions. Another method to significantly enhance Tb3+ emission was increasing the proportion of Ce3+, and this method only require a relatively small amount rare earth (RE) ions for obtaining an obvious emission enhancement. On the other side, companied with the increase of Ce3+ ions concentration, the growth of CeO2 nanoparticles were proved seriously attenuated the photoluminescence intensity of Tb3+ ions. Finally, we also analyzed the influence of annealing temperature on the photoluminescence intensity. These results indicated that an appropriate proportion of Ce3+ ions and suitable size of SnO2 nanocrystals can effectively sensitize the luminescence of Tb3+ ions.

Benzylamine Tartrate as an Organic Glass Substrate for Carbon Films by Evaporation

1970 ◽  
Vol 28 ◽  
pp. 484-485
Author(s):  
A. C. Faberge
Keyword(s):  
Vapor Pressure ◽  
Viscous Liquid ◽  
Glass Substrate ◽  
Room Temperature ◽  
Carbon Film ◽  
Carbon Films ◽  
Organic Glass ◽  
Spectroscopic Examination ◽  
Polymeric Substrates

Benzylamine tartrate (m.p. 63°C) seems to be a better and more convenient substrate for making carbon films than any of those previously proposed. Using it in the manner described, it is easy consistently to make batches of specimen grids as open as 200 mesh with no broken squares, and without individual handling of the grids. Benzylamine tartrate (hereafter called B.T.) is a viscous liquid when molten, which sets to a glass. Unlike polymeric substrates it does not swell before dissolving; such swelling of the substrate seems to be a principal cause of breakage of carbon film. Mass spectroscopic examination indicates a vapor pressure less than 10−9 Torr at room temperature.

A Comparison of the Ultrastructural Morphology of Hepatic Necrosis in BDF1 Mice

1981 ◽  
Vol 39 ◽  
pp. 586-587
Author(s):  
Becky Jackson
Keyword(s):  
Endoplasmic Reticulum ◽  
Smooth Endoplasmic Reticulum ◽  
Preliminary Investigation ◽  
Hepatic Necrosis ◽  
Hepatic Tissue ◽  
Pronounced Increase ◽  
Glycogen Store ◽  
Ultrastructural Morphology ◽  
Mitochondrial Integrity ◽  
Glycogen Stores

Preliminary investigation has indicated similarity in hepatic ultrastructural morphology in nutritional deprivation, and cyanide induced hepatic necrosis. Analysis of hepatic tissue has indicated disruption of intracellular membranes, specifically, reduction in rough endoplasmic reticulum (RER) mitochondrial integrity, and glycogen stores. An increase in smooth endoplasmic reticulum (SER) portion was observed.To further investigate the apparent equivalence of necrotic morphology, ultrastructura1ly, BDF1 mice were subjected to senescence, nutritional deprevation, potassium cyanide (KCN) induced toxemia, and acetaminophen induced toxemia. Controls were utilized to ellucidate non-necrotic hepatocellular normals. U1trastructura1 investigation of controls (Fig. 1) shows densely granular RER, abundant glycogen stores, and morphologically normal mitochondria. Subjects with acetaminophen induced necrosis exhibit reduced normal RER with increased levels of dialated, vesicular RER in apparent conversion to SER (Fig. 2), loss of mitochondrial integrity, and glycogen store reduction. Senescent subjects exhibit a pronounced increase in SER and loss of glycogen store. (Fig. 3). Investigation of the senescent SER at high magnification (Fig. 5) indicates that the SER is arising from degranulating and vesiculating RER.

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