A chemical sensor for CBr4 based on quasi-2D and 3D hybrid organic–inorganic perovskites immobilized on TiO2 films

2018 ◽  
Vol 2 (4) ◽  
pp. 730-740 ◽  
Author(s):  
Pavlos Nikolaou ◽  
Anastasia Vassilakopoulou ◽  
Dionysios Papadatos ◽  
Emmanuel Topoglidis ◽  
Ioannis Koutselas
Keyword(s):  
Chemical Sensor ◽  
Tio2 Films ◽  
Low Dimensional ◽  
2D And 3D

It is possible that methylamine by being reduced could escape to the environment, thus, forcing the remaining perovskite to form other perovskite-like chemical moieties based on low dimensional arrangement of PbBr6 octahedra, rather than PbBr2.

Solid State Synthesis and Characterization of Tin-Based Low-Dimensional Materials

2002 ◽  
Vol 755 ◽  
Author(s):  
Tolulope O. Salami ◽  
Scott R. J. Oliver
Keyword(s):  
Variable Temperature ◽  
Layered Compounds ◽  
Layered Compound ◽  
X Ray Diffraction ◽  
Group 14 ◽  
Potential Applications ◽  
Low Dimensional ◽  
2D And 3D ◽  
Extended Materials

ABSTRACTWe report the synthetic conditions, physical properties and potential applications of late group 14 metal (Sn) 0D, 1D, 2D and 3D extended materials. The structures are primarily neutral chain and anionic layered compounds. The latter are charge-balanced by ammonium cations, as in and BING-7 [Sn(C2O4)F-] [NH4+] and BING-8 [Sn(PO4H)F-] [NH4+]. The neutral layered compound and chain compounds BING-1 [Na4Sn4(C2O4)F6], BING-2 [KSn(C2O4)F] and BING-4 [Sn(C2O4)(C5H5N)] have also been synthesized solvothermally. Thermogravimetric analysis (TGA) under nitrogen and in-situ variable temperature X-ray diffraction show that the materials decompose in the 200°C to 300°C range to more stable phases. Nuclear magnetic resonance (NMR) was used to monitor the ion-exchange properties of some of the materials. The intercalation properties of these materials are still being investigated.

scholarly journals Potential application of mixed metal oxide nanoparticle-embedded glassy carbon electrode as a selective 1,4-dioxane chemical sensor probe by an electrochemical approach

RSC Advances ◽  
2019 ◽  
Vol 9 (72) ◽  
pp. 42050-42061 ◽  
Author(s):  
Mohammed M. Rahman ◽  
M. M. Alam ◽  
Abdullah M. Asiri
Keyword(s):  
Chemical Sensor ◽  
Mixed Metal Oxide ◽  
Carbon Electrode ◽  
Metal Oxide Nanoparticle ◽  
Electrochemical Approach ◽  
Wet Chemical ◽  
Oxide Nanoparticle ◽  
Co Precipitation ◽  
Low Dimensional ◽  
Sensor Probe

Low-dimensional ternary ZnO/NiO/MnO2 nanoparticles were prepared by wet-chemical co-precipitation in alkaline medium and then used to develop a selective and ultra-sensitive 1,4-dioxane sensor using electrochemistry for the safety of healthcare and the environment.

High-sensitive solid chemical sensor for veterinary drugs based on synergism between hydrogen bond and low-dimensional polymer networks

2021 ◽  
Author(s):  
Junhua Kuang ◽  
Jie Yang ◽  
Kai Liu ◽  
Zhiyuan Zhao ◽  
Wei Shi ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Growth And Development ◽  
Chemical Sensor ◽  
Polymer Networks ◽  
Normal Growth ◽  
Animal Origin ◽  
Major Influence ◽  
Veterinary Drug ◽  
Low Dimensional ◽  
Animal Origin Foods

The safety of animal-origin foods has major influence on human health. Although the use of veterinary drug additives (VDAs) significantly promotes the normal growth and development of the animals against...

Chemical sensor development based on polycrystalline gold electrode embedded low-dimensional Ag2O nanoparticles

2013 ◽  
Vol 112 ◽  
pp. 422-430 ◽  
Author(s):  
Mohammed M. Rahman ◽  
Sher Bahadar Khan ◽  
Abdullah M. Asiri ◽  
Abdullah G. Al-Sehemi
Keyword(s):  
Gold Electrode ◽  
Chemical Sensor ◽  
Sensor Development ◽  
Polycrystalline Gold ◽  
Low Dimensional ◽  
Ag2o Nanoparticles

scholarly journals Van der Waals interactions in selected allotropes of phosphorus

2015 ◽  
Vol 230 (2) ◽  
Author(s):  
Frederik Bachhuber ◽  
Joerg von Appen ◽  
Richard Dronskowski ◽  
Peer Schmidt ◽  
Tom Nilges ◽  
...  
Keyword(s):  
Density Functional ◽  
Local Density ◽  
Van Der Waals ◽  
Van Der Waals Interactions ◽  
Special Focus ◽  
Generalized Gradient ◽  
Long Range Interactions ◽  
Key Factor ◽  
Low Dimensional ◽  
2D And 3D

AbstractSelected allotropes of phosphorus are investigated by different levels of density functional theory (DFT) calculations to evaluate the relative stability orders with a special focus on the role of van der Waals interactions. Phosphorus is an excellent reference system with a large number of allotropes. Starting from low-dimensional molecular (0D, white P) and polymer structures (1D, P nanorods) to layered (2D, black P) and tubular structures (2D and 3D, crystalline forms of red P), covalent structure motifs are interconnected by van der Waals interactions. They are a key factor for the correct energetic description of all P allotropes. A comparative study is carried out within the local density approximation (LDA) and the generalized gradient approximation (GGA), with and without implementation of a dispersion correction by Grimme (GGA-D2). Our intention is to achieve a reasonable agreement of our calculations with experimental data, the plausibility of energy values, and the treatment of long-range interactions. The effect of van der Waals interactions is exemplified for the interlayer distances of black phosphorous and its electronic structure.

scholarly journals Quantitative and Qualitative Comparison of 2D and 3D Projection Techniques for High-Dimensional Data

Information ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 239
Author(s):  
Zonglin Tian ◽  
Xiaorui Zhai ◽  
Gijs van Steenpaal ◽  
Lingyun Yu ◽  
Evanthia Dimara ◽  
...  
Keyword(s):  
Dimensional Space ◽  
High Dimensional Data ◽  
Visual Exploration ◽  
Added Value ◽  
High Dimensional ◽  
Qualitative Comparison ◽  
Projection Techniques ◽  
The One ◽  
Low Dimensional ◽  
2D And 3D

Projections are well-known techniques that help the visual exploration of high-dimensional data by creating depictions thereof in a low-dimensional space. While projections that target the 2D space have been studied in detail both quantitatively and qualitatively, 3D projections are far less well understood, with authors arguing both for and against the added-value of a third visual dimension. We fill this gap by first presenting a quantitative study that compares 2D and 3D projections along a rich selection of datasets, projection techniques, and quality metrics. To refine these insights, we conduct a qualitative study that compares the preference of users in exploring high-dimensional data using 2D vs. 3D projections, both without and with visual explanations. Our quantitative and qualitative findings indicate that, in general, 3D projections bring only limited added-value atop of the one provided by their 2D counterparts. However, certain 3D projection techniques can show more structure than their 2D counterparts, and can stimulate users to further exploration. All our datasets, source code, and measurements are made public for ease of replication and extension.

Selective hydrazine sensor fabrication with facile low-dimensional Fe2O3/CeO2 nanocubes

2018 ◽  
Vol 42 (12) ◽  
pp. 10263-10270 ◽  
Author(s):  
Mohammed M. Rahman ◽  
M. M. Alam ◽  
Abdullah M. Asiri
Keyword(s):  
Metal Oxides ◽  
Chemical Sensor ◽  
Hydrothermal Process ◽  
Real Samples ◽  
Sensor Fabrication ◽  
Low Dimensional ◽  
Hydrazine Sensor

Here, the binary-doped metal oxides of Fe2O3/CeO2 nanocubes were prepared using reliable hydrothermal process, which is applied to fabricate an efficient and selective hydrazine chemical sensor shows good analytical sensing performances as well as validated the sensor prove with the environmental and extracted real samples.

scholarly journals Photoplasmonic assembly of dielectric-metal, Nd2O3-Gold soret nanointerfaces for dequenching the luminophore emission

Nanophotonics ◽  
2021 ◽  
Vol 10 (13) ◽  
pp. 3417-3431 ◽  
Author(s):  
Seemesh Bhaskar ◽  
Pratyusha Das ◽  
Maku Moronshing ◽  
Aayush Rai ◽  
Chandramouli Subramaniam ◽  
...  
Keyword(s):  
Refractive Index ◽  
Intrinsic Property ◽  
High Refractive Index ◽  
Robust Performance ◽  
Plasmonic Material ◽  
Coherent Coupling ◽  
Carbon Substrates ◽  
Adiabatic Cooling ◽  
Low Dimensional ◽  
2D And 3D

Abstract A variety of materials such as low dimensional carbon substrates (1D, 2D, and 3D), nanoprisms, nanocubes, proteins, ceramics, and DNA to name a few, have been explored in surface plasmon-coupled emission (SPCE) platform. While these offer new physicochemical insights, investigations have been limited to silver as primary plasmonic material. Although, gold nanoparticles (AuNPs) exhibit robust performance, its intrinsic property to quench the emission from radiating dipoles (at distances < 5 nm) has impeded its utility. Despite the use of metal-dielectric resonances (with Au decorated SiO2 NPs) and sharp nanotips (from Au nanostars) for dequenching the emission, the enhancements obtained has been less than 200-fold in SPCE platform. To address these long-standing challenges, we demonstrate the utility of gold soret colloids (AuSCs) and photonic crystal-coupled emission (PCCE) platform. The soret nano-assemblies synthesized using adiabatic cooling technique presented integrated hotspots when taken with high refractive index Nd2O3 ‘Huygens sources’. The collective and coherent coupling between localized Mie and delocalized Bragg plasmons (of sorets), dielectric plasmons (of Nd2O3), highly confined and intense Bloch surface waves (of PCCE platform) aided in realization of dequenched, as well as amplified > 1500-fold enhancements at the photoplasmonic nanocavity interface, presenting new opportunities for multidisciplinary applications.

scholarly journals Rapid and sensitive detection of selective 1,2-diaminobenzene based on facile hydrothermally prepared doped Co3O4/Yb2O3 nanoparticles

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0246756
Author(s):  
Mohammed M. Rahman
Keyword(s):  
Chemical Sensor ◽  
Dynamic Range ◽  
Electrochemical Technique ◽  
Carbon Electrode ◽  
Linear Dynamic Range ◽  
Linear Dynamic ◽  
Low Dimensional ◽  
Sensor Probe ◽  
Broad Scale

In this approach, the performance of a newly developed sensor probe coated with low-dimensional Co3O4/Yb2O3 nanoparticles (NPs) in rapidly detecting 1,2-diaminobenzene was evaluated by an electrochemical technique. The sensor probe was fabricated by depositing a very thin layer consisting of synthesized Co3O4/Yb2O3 NPs using a 5% Nafion conducting binder onto a glassy carbon electrode (GCE). The facile hydrothermally prepared Co3O4/Yb2O3 NPs were totally characterized by conventional methods such as FTIR, UV-vis, TEM, XPS, EDS, and XRD analyses. The fabricated chemical sensor probe was found to exhibit long-term activity, stability in electrochemical response, good sensitivity (5.6962 μAμM-1cm-2), lowest detection limit (0.02±0.001 pM), and broad linear dynamic range (0.1 pM to 0.01 mM). The observed performances suggest that the newly introduced sensor could play an efficient role in detecting 1,2-diaminobenzene especially in healthcare and environmental applications on a broad scale.

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