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Lspr Gas Sensors | Encyclopedia

The localized surface plasmon resonance (LSPR) phenomenon is known to be responsible for the unique colour effects observed in the ancient Roman Lycurgus Cup and at the windows of the medieval cathedrals. In both cases, the optical effects result from the interaction of the visible light (scattering and absorption) with the conduction band electrons of noble metal nanoparticles (gold, silver ...


Resistivetype hydrogen gas sensor based on TiO2: A …

08/11/2018· Gas sensor response S as a function of temperature at the hydrogen concentration of (a) 200 ppm and (b) 1100 ppm [65]. Li [79] et al. fabricated the hydrogen gas sensor based on the Nidoped TiO 2 nanotubes fabricated by the electrochemical anodization of NiTi alloy and annealing treatment at 525 °C.


US9638633B2 Surface plasmon resonance gas sensor, gas ...

The present invention relates to a gas sensor comprising a sensor layer ( 100 ) comprising a plasmonic sensor ( 102 ) provided so as to allow, upon illumination with electromagnetic radiation a localized surface plasmon resonance condition, a sensing layer ( 106 ) comprising a gas permeable material that, when exposed to a gas, modifies the localized surface plasmon resonance condition, a ...


Lspr Gas Sensors | Encyclopedia

LSPR Gas Sensors Subjects: Physics, Applied Contributors: Joel Borges, Marco S. Rodrigues, Mikhail Vasilevskiy Submitted by: Joel Borges Definition 1. Overview on Gas Sensors The Human Olfactory System The human olfactory system (Figure 1) is used to evaluate the quality of food, drinks, perfumes, cosmetics, and chemical products. Unfortunately, the nose is capable of sensing only a small ...


Reducing gases and VOCs optical sensing using surface ...

01/10/2013· These films have been tested as optical gas sensor for the recognition of CO and H 2 or for volatile organic compounds (VOC). The effect of Au concentration and size on the gas sensing properties has been studied. 2. Experimental . Au NPs of about 13 nm in diameter (hereafter called Au13) were synthesized in water with the Turkevich method as described in : briefly, 12 mL of 1% trisodium ...


Nanoplasmonic response of porous AuTiO2 thin films ...

19/03/2019· The transmittance minimum of the LSPR band appeared at around 600 nm, leading to a redshift to about 626 nm for the highest incidence angle α = 80°, due to the presence of larger (scattering) nanoparticles. It is demonstrated that zigzag nanostructures can enhance adsorption sites for LSPR sensing by tailoring the porosity of the thin films. Atmosphere controlled transmittanceLSPR ...


Two dimensional LSPR gas sensor with Au/Ag coreshell ...

Request PDF | On May 1, 2019, Takaaki Soeda and others published Two dimensional LSPR gas sensor with Au/Ag coreshell structure | Find, read and cite all the research you need on ResearchGate


Sensors | Free FullText | The Response of UV/Blue Light ...

We successfully fabricated a planar nanocomposite film that uses a composite of silver nanoparticles and titanium dioxide film (AgTiO2) for ultraviolet (UV) and blue light detection and application in ozone gas sensor. Ultravioletvisible spectra revealed that silver nanoparticles have a strong surface plasmon resonance (SPR) effect. A strong redshift of the plasmonic peak when the silver ...


WO2015091811A1 Surface plasmon resonance gas sensor, …

The present invention relates to a gas sensor comprising a sensor layer (100) comprising a plasmonic sensor (102) provided so as to allow, upon illumination with electromagnetic radiation a localized surface plasmon resonance condition, a sensing layer (106) comprising a gas permeable material that, when exposed to a gas, modifies the localized surface plasmon resonance condition, a separating ...


Insitu annealing transmission electron microscopy of ...

01/11/2021· LSPR band minimum wavelength shift analyzed by NANOPTICS software, ... A singlenanoparticle NO2 gas sensor constructed using active molecular plasmonics. Chem. Commun., 51 (2015), pp. 13261329, /c4cc08395d. CrossRef View Record in Scopus Google Scholar. Lo, Chen, Huang, Chang. Gold nanoparticlealuminum oxide adsorbent for efficient …


LSPRexcited obvious hydrogen yield enhancement for TiO2 ...

A favorable process that utilizing upconversion (UC) luminescence to enhance the photocatalytic property for H2 evolution is designed. In this work, TiO2:Er3+, Yb3+ nanosheets (NTs) are synthesized through facile solvothermal method. With a 980nm laser excitation, the UC luminescence bands at about 522, 546 and 625 nm separately corresponding to the energylevel transitions of 2H11/2, 4S3/2 ...


The LSPR regulation of TiO2: W nanocrystals and its ...

Here, the LSPR absorption and morphology of the semiconductor nanocrystalline TiO2: W were adjusted by using ammonium fluoride during synthesis. Significant absorption enhancement of TiO2: W in the nearinfrared region was obtained to enhance the UCL of NaYF4: Yb3+, Er3+. The Glass/NaYF4: Yb3+, Er3+/TiO2: WSiO2 layered structure films were fabricated through spin coating. Compared with …


Bifunctional Au–TiO2 thin films with enhanced ...

17/08/2019· In the current study, Au–TiO2 thin films were prepared on glass substrates through the combined approach of spincoating thermal evaporation method. The decoration of Au nanoparticles on to TiO2 surface has been achieved by the thermal annealing process under Ar atmosphere. Au–TiO2 thin films with improved optical absorption and effective bandgap narrowing exhibits outstanding ...


A NO 2 Gas Sensor with a TiO 2 …

Download Citation | A NO 2 Gas Sensor with a TiO 2 Nanoparticles/ZnO/MEMSStructure that is Produced Using Ultrasonic Wave Grinding Technology | This study produces ...


Jiaqiang Xu | Shanghai University

Compared with Au/TiO2, it is proven indirectly that the photoexcited electrons of CdS/Au/TiO2 transfer from CdS to Au, and then to TiO2. Furthermore, we discuss the photocatalytic dual opposite roles of Au nanoparticles between CdS and TiO2, the positive effect includes localized surface plasmon resonance (LSPR) and Schottky barrier (SB), and ...


A NO 2 Gas Sensor with a TiO 2 Nanoparticles/ZnO/MEMS ...

Download Citation | A NO 2 Gas Sensor with a TiO 2 Nanoparticles/ZnO/MEMSStructure that is Produced Using Ultrasonic Wave Grinding Technology | This study produces ...


182598 PDFs | Review articles in TITANIUM DIOXIDE

Explore the latest fulltext research PDFs, articles, conference papers, preprints and more on TITANIUM DIOXIDE. Find methods information, sources, references or conduct a literature review on ...


Hot Electrons in TiO2–Noble Metal NanoHeterojunctions ...

10/05/2021· LSPR excitation can be used to drive remote and direct photochemistry; photonic energy can either be transferred to nearby semiconductors, metals, and molecular photocatalysts or facilitate chemical transformations that occur directly on the surface of the plasmonic nanostructures . All these processes are characterized exclusively by electron or hole transfer from excited metal nanoparticles ...


Applications of TiO2 in sensor devices ScienceDirect

01/01/2021· This chapter provides an overview of titanium dioxide ... TiO 2, leading to the increase or decrease of resistance of TiO 2 materials, the typical sensing mechanism of TiO 2based gas sensor. Furthermore, the conductivity property can be modified by doping other elements (especially metal elements) into TiO 2 materials. By controlling the doping pattern, such as doping dosage and heating ...