Construction of dimetal-containing dithiolene and Schiff base conjugated polymer coating: exploiting metal coordination as a design strategy for improving infrared stealth properties

2019 ◽  
Vol 10 (43) ◽  
pp. 5839-5848 ◽  
Author(s):  
Jingwen Cai ◽  
Jianhua Han ◽  
Guojia Ma ◽  
Xing Liu ◽  
Jinyan Wang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Conjugated Polymer ◽  
Polymer Coating ◽  
Near Infrared ◽  
Far Infrared ◽  
Design Strategy ◽  
Polymer Coatings ◽  
Metal Coordination ◽  
Infrared Range

Dimetal-containing dithiolene and Schiff base conjugated polymer coatings are constructed and exhibit excellent stealth abilities in the NIR (near-infrared) and MFIR (mid–far-infrared) range.

Non-Destructive Spectroscopic Investigations on Paintings Using Optical Fibers

1992 ◽  
Vol 267 ◽  
Author(s):  
M. Bacci ◽  
S. Baronti ◽  
A. Casini ◽  
F. Lotti ◽  
M. Picollo ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Near Infrared ◽  
Far Infrared ◽  
Infrared Region ◽  
Infrared Range ◽  
Color Analysis ◽  
Near Infrared Spectra ◽  
Renaissance Period ◽  
Band Pass ◽  
Non Destructive

ABSTRACTThe main objective of our research is the development of totally non-destructive methodologies for the investigation of art works. We propose the use of fiber optic reflectance spectroscopy (FORS) in the visible and near-infrared region as a tool for the identification of the pigments used in painting. We have considered several representative inorganic artists' pigments (mainly till the Renaissance period); powder X-ray diffractograms and diffuse reflectance spectra in the visible, near-, middle- and far-infrared range were recorded for pure pigments. Then we prepared suitable samples with the same pigments using fresco, tempera and oil techniques. The visible and near-infrared spectra of these samples were recorded using an optical fiber spectrum analyzer; color analysis (chromaticity, dominant wavelength and purity) was also performed. The obtained results were used in the interpretation of the spectra obtained from some paintings collected in the Uffizi Gallery, Florence (Giotto and Luca Signorelli). The pointwise information obtained by FORS analysis was also used to calibrate and tune an image spectroscopy system, based on sequences of band-pass filtered images in the near infrared range.

A design strategy of D-A conjugated polymer for NIR-II fluorescence imaging

2021 ◽  
Author(s):  
Yingbin Su ◽  
Yawei Miao ◽  
Yaowei Zhu ◽  
Wentao Zou ◽  
Bing Yu ◽  
...  
Keyword(s):  
Visible Light ◽  
Fluorescence Imaging ◽  
Conjugated Polymer ◽  
Near Infrared ◽  
Design Strategy

The development of bioimaging technology in recent years shows that the second near-infrared (NIR-II) fluorescence imaging (FI) is gradually replacing the traditional visible light and the first near-infrared (NIR-I) FI....

Infrared and Visible—Near Infrared Electroluminescence Developments for FA in AlGaN/GaN HEMTS on SiC

2010 ◽  
Author(s):  
M. Bouya ◽  
D. Carisetti ◽  
J.C. Clement ◽  
N. Malbert ◽  
N. Labat ◽  
...  
Keyword(s):  
Failure Analysis ◽  
Near Infrared ◽  
High Electron Mobility Transistor ◽  
Low Noise ◽  
Civil Defense ◽  
Base Stations ◽  
Infrared Range ◽  
High Electron ◽  
Radar Applications ◽  
Gan Hemts

Abstract HEMT (High Electron Mobility Transistor) are playing a key role for power and RF low noise applications. They are crucial components for the development of base stations in the telecommunications networks and for civil, defense and space radar applications. As well as the improvement of the MMIC performances, the localization of the defects and the failure analysis of these devices are very challenging. To face these challenges, we have developed a complete approach, without degrading the component, based on front side failure analysis by standard (Visible-NIR) and Infrared (range of wavelength: 3-5 µm) electroluminescence techniques. Its complementarities and efficiency have been demonstrated through two case studies.

scholarly journals Creation of Negatively Charged Boron Vacancies in Hexagonal Boron Nitride Crystal by Electron Irradiation and Mechanism of Inhomogeneous Broadening of Boron Vacancy-Related Spin Resonance Lines

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1373
Author(s):  
Fadis F. Murzakhanov ◽  
Boris V. Yavkin ◽  
Georgiy V. Mamin ◽  
Sergei B. Orlinskii ◽  
Ivan E. Mumdzhi ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Electron Irradiation ◽  
Near Infrared ◽  
Hexagonal Boron Nitride ◽  
Optical Excitation ◽  
High Energy ◽  
Infrared Range ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Spin Resonance

Optically addressable high-spin states (S ≥ 1) of defects in semiconductors are the basis for the development of solid-state quantum technologies. Recently, one such defect has been found in hexagonal boron nitride (hBN) and identified as a negatively charged boron vacancy (VB−). To explore and utilize the properties of this defect, one needs to design a robust way for its creation in an hBN crystal. We investigate the possibility of creating VB− centers in an hBN single crystal by means of irradiation with a high-energy (E = 2 MeV) electron flux. Optical excitation of the irradiated sample induces fluorescence in the near-infrared range together with the electron spin resonance (ESR) spectrum of the triplet centers with a zero-field splitting value of D = 3.6 GHz, manifesting an optically induced population inversion of the ground state spin sublevels. These observations are the signatures of the VB− centers and demonstrate that electron irradiation can be reliably used to create these centers in hBN. Exploration of the VB− spin resonance line shape allowed us to establish the source of the line broadening, which occurs due to the slight deviation in orientation of the two-dimensional B-N atomic plains being exactly parallel relative to each other. The results of the analysis of the broadening mechanism can be used for the crystalline quality control of the 2D materials, using the VB− spin embedded in the hBN as a probe.

Theranostic Near-Infrared-Active Conjugated Polymer Nanoparticles

ACS Nano ◽  
2021 ◽  
Author(s):  
Miao Zhao ◽  
Edward Leggett ◽  
Struan Bourke ◽  
Souzana Poursanidou ◽  
Sadie Carter-Searjeant ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Near Infrared ◽  
Polymer Nanoparticles ◽  
Conjugated Polymer Nanoparticles

scholarly journals Conjugated Polymer Coating Enabled Light-resistance Black Phosphorus with Enhanced Stability

2021 ◽  
Author(s):  
XINGYUN Li ◽  
Bin Han ◽  
Yaojie Xu ◽  
Xiao Liu ◽  
Chunhui Zhao ◽  
...  
Keyword(s):  
Conjugated Polymer ◽  
Polymer Coating ◽  
Black Phosphorus ◽  
Two Dimensional ◽  
Practical Application ◽  
2D Material ◽  
Light Resistance ◽  
Enhanced Stability

As an advanced two-dimensional (2D) material with unique properties, black phosphorus (BP) has attracted great attention in a variety of fields. One of the main obstacles for practical application of...

[Ln4] Complexes Based on 8-hydroxylquinoline-Schiff Base: Synthesis, Crystal Structure and Near-infrared Emission

Polyhedron ◽  
2021 ◽  
pp. 115165
Author(s):  
Jian Gou ◽  
Qian-Qi Yang ◽  
Si-Yu Li ◽  
Li-Hua Zhao ◽  
Hong-Ling Gao ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Schiff Base ◽  
Near Infrared ◽  
Infrared Emission ◽  
Near Infrared Emission
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