Efficient synthesis and optical properties of highly luminescent copper nanoclusters

2018 ◽  
Author(s):  
Maria Jessabel Talite ◽  
Chi-Tsu Yuan ◽  
Wu-Ching Chou
Keyword(s):  
Optical Properties ◽  
Efficient Synthesis ◽  
Copper Nanoclusters

Synthesis, optical properties and applications of light-emitting copper nanoclusters

2017 ◽  
Vol 2 (3) ◽  
pp. 135-146 ◽  
Author(s):  
Zhenguang Wang ◽  
Bingkun Chen ◽  
Andrey L. Rogach
Keyword(s):  
Optical Properties ◽  
Copper Nanoclusters ◽  
Light Emitting ◽  
Earth Abundant ◽  
Metal Nanocluster ◽  
Commercial Sources

Copper is an earth abundant, inexpensive metal readily available from commercial sources, which is increasingly coming into focus for light-emitting metal nanocluster research.

Efficient Synthesis, Structural Characterization, and Optical Properties of 6H -Dibenzo[b ,h ]carbazole and Its Derivatives

2019 ◽  
Vol 2019 (23) ◽  
pp. 3788-3793
Author(s):  
Mio Matsumura ◽  
Masatoshi Kawahata ◽  
Atsuya Muranaka ◽  
Miyuki Hiraiwa ◽  
Kentaro Yamaguchi ◽  
...  
Keyword(s):  
Optical Properties ◽  
Structural Characterization ◽  
Efficient Synthesis

The isomeric effect of mercaptobenzoic acids on the preparation and fluorescence properties of copper nanoclusters

2015 ◽  
Vol 51 (60) ◽  
pp. 11983-11986 ◽  
Author(s):  
Yi-Jyun Lin ◽  
Po-Cheng Chen ◽  
Zhiqin Yuan ◽  
Jia-Ying Ma ◽  
Huan-Tsung Chang
Keyword(s):  
Optical Properties ◽  
Copper Nitrate ◽  
Fluorescence Properties ◽  
Copper Nanoclusters ◽  
Isomeric Effect

Copper nanoclusters (Cu NCs) aggregates prepared from copper nitrate and mercaptobenzoic acid (MBA) isomers show differential optical properties.

(Aminophenyl)porphyrins as precursors for the synthesis of porphyrin-modified siloxanes

2019 ◽  
Vol 23 (09) ◽  
pp. 1001-1012
Author(s):  
José Almeida ◽  
Maria E. Fortună ◽  
Lucia Pricop ◽  
Andrei Lobiuc ◽  
Andreia Leite ◽  
...  
Keyword(s):  
Optical Properties ◽  
Microwave Irradiation ◽  
Functional Groups ◽  
Emission Spectra ◽  
Efficient Synthesis ◽  
Subsequent Reaction ◽  
Maldi Tof Ms ◽  
Absorption And Emission ◽  
H Nmr ◽  
Tof Ms

The present research reports the efficient synthesis of mono- and di-(aminophenyl)porphyrins and their metalation with Zn(II) using microwave irradiation. The subsequent reaction of amino-functionalized porphyrins with siloxane moieties bearing epoxy or carboxyl functional groups provided four new porphyrin-modified siloxanes. The structure of the resulting derivatives was established by 1H-NMR and MALDI-TOF-MS. The optical properties of the porphyrin chromophores were preserved, as proven by comparing the absorption and emission spectra of the initial porphyrins to those of the porphyrin-modified siloxanes.

Furyl derivatives of pyrene: Efficient synthesis and relevant optical properties

2014 ◽  
Vol 103 ◽  
pp. 55-61 ◽  
Author(s):  
Krzysztof R. Idzik ◽  
Przemyslaw Ledwon ◽  
Tobias Licha ◽  
Wojciech Kuznik ◽  
Mieczyslaw Lapkowski ◽  
...  
Keyword(s):  
Optical Properties ◽  
Efficient Synthesis ◽  
Derivatives Of

scholarly journals Optical properties and dust temperatures in clumpy diffuse medium

2020 ◽  
Vol 495 (4) ◽  
pp. 4314-4325 ◽  
Author(s):  
Andrei B Ostrovskii ◽  
S Yu Parfenov ◽  
A I Vasyunin ◽  
A V Ivlev ◽  
V A Sokolova
Keyword(s):  
Optical Properties ◽  
Interstellar Dust ◽  
Spatial Scales ◽  
Gas Mixture ◽  
Efficient Synthesis ◽  
Dust Temperature ◽  
Interstellar Dust Grains ◽  
Far Ultraviolet ◽  
The Impact ◽  
Diffuse Medium

ABSTRACT In this study, we explore the impact of inhomogeneities in the spatial distribution of interstellar dust on spatial scales of ≤1 au caused by ion shadowing forces on the optical properties of diffuse interstellar medium (ISM) as well as on the dust temperature. We show that recently proposed possibility that interstellar dust grains in the diffuse ISM are grouped in spherical cloudlets (clumps) may significantly affect the observed optical properties of the diffuse ISM in comparison to that calculated under the commonly accepted assumption on the uniform dust/gas mixture if the size of clumps ≳0.1 au. We found that opacity of an arbitrary region of diffuse ISM quickly decreases with growth of dusty clumps. We also studied the dependence of opacity and dust temperature inside the dusty clumps on their size. We show that the clumps larger than 0.1 au are opaque for far-ultraviolet radiation. Dust temperature exhibits a gradient inside a clump, decreasing from the edge to the centre by several degrees for a clump of a size of 0.1 au and larger. We argue that dust temperatures and high opacity within clumps larger than 0.1 au may facilitate somewhat more efficient synthesis of molecules on surfaces of interstellar grains in the diffuse ISM than it was anticipated previously. On the other hand, the presence of clumps with sizes below 0.1 au makes small or negligible influence on the optical properties of the diffuse ISM in comparison to the case with uniform dust/gas mixture.

Design of objective lens for 200-kV high-resolution electron microscopes

1983 ◽  
Vol 41 ◽  
pp. 314-315
Author(s):  
K. Tsuno ◽  
T. Honda ◽  
Y. Harada ◽  
M. Naruse
Keyword(s):  
Optical Properties ◽  
Computer Technology ◽  
Axial Magnetic Field ◽  
Chromatic Aberration ◽  
Objective Lens ◽  
Resolution Electron ◽  
Correction Of Astigmatism ◽  
Three Stages ◽  
Electron Microscopes ◽  
Stage 1

Developement of computer technology provides much improvements on electron microscopy, such as simulation of images, reconstruction of images and automatic controll of microscopes (auto-focussing and auto-correction of astigmatism) and design of electron microscope lenses by using a finite element method (FEM). In this investigation, procedures for simulating the optical properties of objective lenses of HREM and the characteristics of the new lens for HREM at 200 kV are described.The process for designing the objective lens is divided into three stages. Stage 1 is the process for estimating the optical properties of the lens. Firstly, calculation by FEM is made for simulating the axial magnetic field distributions Bzc of the lens. Secondly, electron ray trajectory is numerically calculated by using Bzc. And lastly, using Bzc and ray trajectory, spherical and chromatic aberration coefficients Cs and Cc are numerically calculated. Above calculations are repeated by changing the shape of lens until! to find an optimum aberration coefficients.

Optical Properties of HVEM Accelerators

1975 ◽  
Vol 33 ◽  
pp. 180-181
Author(s):  
A. Strojnik ◽  
J.W. Scholl ◽  
V. Bevc
Keyword(s):  
Optical Properties ◽  
Electron Accelerator ◽  
Systematic Investigation ◽  
Electron Source ◽  
High Brightness ◽  
The Past ◽  
Wide Range ◽  
Optical Behavior

The electron accelerator, as inserted between the electron source (injector) and the imaging column of the HVEM, is usually a strong lens and should be optimized in order to ensure high brightness over a wide range of accelerating voltages and illuminating conditions. This is especially true in the case of the STEM where the brightness directly determines the highest resolution attainable. In the past, the optical behavior of accelerators was usually determined for a particular configuration. During the development of the accelerator for the Arizona 1 MEV STEM, systematic investigation was made of the major optical properties for a variety of electrode configurations, number of stages N, accelerating voltages, 1 and 10 MEV, and a range of injection voltages ϕ0 = 1, 3, 10, 30, 100, 300 kV).

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