Alignment and characterization of high uniformity imaging spectrometers

2011 ◽  
Author(s):  
Holly A. Bender ◽  
Pantazis Mouroulis ◽  
Michael L. Eastwood ◽  
Robert O. Green ◽  
Sven Geier ◽  
...  
Keyword(s):  
High Uniformity

Synthesis and characterization of monodisperse metalloporphyrin nanospheres

2009 ◽  
Vol 24 (12) ◽  
pp. 3510-3515
Author(s):  
Chunhui Li ◽  
Wanjie Wang ◽  
Yanxia Cao
Keyword(s):  
Room Temperature ◽  
Influence Factors ◽  
Visible Spectrum ◽  
Synthesis And Characterization ◽  
Transmission Electron ◽  
High Uniformity ◽  
Reprecipitation Method ◽  
Temperature Scanning ◽  
Surfactant Assisted

Uniform monodisperse nanospheres of tetra-kis(4-methoxylphenyl) porphynatemanganese (III) chloride [MnIII(TMOPP)Cl] of about 200 nm have been synthesized through a facile surfactant-assisted reprecipitation method at room temperature. Scanning electron microscopy, transmission electron microscope, infrared spectrum, ultraviolet–visible spectrum, and elemental analysis were adopted to characterize the as-prepared metalloporphyrin nanostructures. The influence factors in the reaction to the sizes and morphologies of porphyrin nanoparticles were discussed. The sizes of porphyrin nanoparticles were affected mainly by the porphyrin concentration and only monodisperse nanoshperes with high uniformity in sizes and shapes can self-assemble to form order two-dimensional superstructures.

Fabrication and microscopic characterization of a single quantum-wire laser with high uniformity

2004 ◽  
Vol 21 (2-4) ◽  
pp. 230-235 ◽  
Author(s):  
Masahiro Yoshita ◽  
Yuhei Hayamizu ◽  
Hidefumi Akiyama ◽  
Loren N. Pfeiffer ◽  
Ken W. West
Keyword(s):  
Quantum Wire ◽  
Single Quantum ◽  
High Uniformity

Fabrication and Characterization of Photonic Crystals by Two-Photon Polymerization Using a Femtosecond Laser

2013 ◽  
Author(s):  
Yinan Tian ◽  
Yung C. Shin ◽  
Galen B. King
Keyword(s):  
Sol Gel ◽  
Three Dimensional ◽  
Quantitative Relationship ◽  
Scanning Speed ◽  
Sem Images ◽  
Two Photon ◽  
High Uniformity ◽  
The Relationship ◽  
Two Photon Polymerization

Two-photon polymerization is a powerful technique in fabricating three dimensional sub-diffraction-limited structures. Recently, new sol-gel material, SZ2080, was introduced into two-photon polymerization and was proved to be better than the conventional materials for its negligible shrinkage. In this paper, two-photon polymerization was applied to generate woodpile structures, one kind of photonic crystal, using SZ2080. First, the relationship between scanning speed, laser power and resolution was determined through fabricating free-hanging lines. Based on this relationship, woodpile structures with different period distances were fabricated with high uniformity as shown by SEM images. Then optical properties of woodpile structures were investigated using Fourier Transform Infrared Spectroscopy (FTIR) and a quantitative relationship between band gap and period distance was established.

Nanofabrication and characterization of a grating-based condenser for uniform illumination with hard X-rays

2017 ◽  
Vol 24 (3) ◽  
pp. 595-599
Author(s):  
Jianpeng Liu ◽  
Xin Li ◽  
Shuo Chen ◽  
Sichao Zhang ◽  
Shanshan Xie ◽  
...  
Keyword(s):  
Finite Difference Time Domain ◽  
Optical Characterization ◽  
X Rays ◽  
Uniform Illumination ◽  
Basic Study ◽  
Full Field ◽  
X Ray ◽  
High Uniformity ◽  
Difference Time

In the development of full-field transmission X-ray microscopy for basic study in science and technology, a condenser capable of providing intense illumination with high uniformity and stability on tested specimens in order to achieve high-quality images is essential. The latest design of a square-shaped condenser based on diffractive gratings has demonstrated promising uniformity in illumination. This paper describes in more detail the development of such a beam shaper for hard X-rays at 10 keV with regard to its design, manufacture and optical characterization. The effect of the grating profile on the diffracted intensity has been theoretically predicted by numerical simulation using the finite-difference time-domain method. Based on this, the limitations of the grating-based condenser are discussed.

Complementary Resistive Switches (CRS): High speed performance for the application in passive nanocrossbar arrays

2011 ◽  
Vol 1337 ◽  
Author(s):  
Roland Rosezin ◽  
Eike Linn ◽  
Lutz Nielen ◽  
Carsten Kügeler ◽  
Rainer Bruchhaus ◽  
...  
Keyword(s):  
High Speed ◽  
Simple Procedure ◽  
Electrical Characterization ◽  
Building Blocks ◽  
Next Generation ◽  
High Uniformity ◽  
Non Volatile Memory ◽  
Speed Performance ◽  
Resistive Switches

ABSTRACTIn this report, the fabrication and electrical characterization of fully vertically integrated complementary resistive switches (CRS), which consist of two anti-serially connected Cu-SiO2 memristive elements, is presented. The resulting CRS cells are initialized by a simple procedure and show high uniformity of resistance states afterwards. Furthermore, the CRS cells show high switching speeds below 50 ns, making them excellent building blocks for next generation non-volatile memory based on passive nanocrossbar arrays.

Modeling and Characterization of the Hydrogenated Amorphous Silicon Metal Insulator Semiconductor Photosensors for Digital Radiography

2007 ◽  
Vol 989 ◽  
Author(s):  
Nader Safavian ◽  
Y. Vygranenko ◽  
J. Chang ◽  
Kyung Ho Kim ◽  
J. Lai ◽  
...  
Keyword(s):  
Amorphous Silicon ◽  
Spectral Response ◽  
Large Area ◽  
Metal Insulator ◽  
Active Matrix ◽  
High Uniformity ◽  
Measurement Results ◽  
Temperature Deposition ◽  
Hydrogenated Amorphous

AbstractBecause of the inherent desired material and technological attributes such as low temperature deposition and high uniformity over large area, the amorphous silicon (a-Si:H) technology has been extended to digital X-ray diagnostic imaging applications. This paper reports on design, fabrication, and characterization of a MIS-type photosensor that is fully process-compatible with the active matrix a-Si:H TFT backplane. We discuss the device operating principles, along with measurement results of the transient dark current, linearity and spectral response.

Synthesis and Photocatalytic Characterization of Porous Cuprous Oxide

2012 ◽  
Vol 554-556 ◽  
pp. 628-631
Author(s):  
Yun Na Dong ◽  
De Qing Chu ◽  
Li Min Wang
Keyword(s):  
Aqueous Solution ◽  
Cuprous Oxide ◽  
Copper Chloride ◽  
Synthesis Method ◽  
Distilled Water ◽  
Solar Light Irradiation ◽  
High Uniformity ◽  
Micro Structures

Cuprous oxide (Cu2O) nanoparticals with high uniformity were prepared by the hydrothermal synthesis method using copper chloride and potassium chloride in the solvent of distilled water. Their micro- structures were characterized by using XRD, XPS and TEM techniques. The photocatalysis of the prepared samples were evaluated by the degradation of melthyl orange (MO) in aqueous solution under solar light irradiation. It can be found that Cu2O sample was highly efficient catalysts and the Catalytic degradation of the Cu2O nanoparticals for MO was not only due to the quality of Cu2O samples but also to the concentration of H2O2. The decoloring ratio for MO solution has reached 98.6% in 110min

Fabrication and Characterization of Photonic Crystals in Photopolymer SZ2080 by Two-Photon Polymerization Using a Femtosecond Laser

2014 ◽  
Vol 2 (3) ◽  
Author(s):  
Yinan Tian ◽  
Hyukjoon Kwon ◽  
Yung C. Shin ◽  
Galen B. King
Keyword(s):  
Photonic Crystals ◽  
Optical Sensors ◽  
Empirical Relationship ◽  
Three Dimensional ◽  
Scanning Speed ◽  
Sem Images ◽  
Two Photon ◽  
High Uniformity ◽  
Two Photon Polymerization

Two-photon polymerization (2PP) is a powerful technique in fabricating three-dimensional subdiffraction-limited structures. In this paper, 2PP was applied to generate woodpile structures, one kind of photonic crystal, using SZ2080, which is widely used in 2PP due to its negligible shrinkage. First, the relationship between scanning speed, laser power, and resolution was determined through fabricating free-hanging lines by theoretical and experimental study. Based on this relationship, woodpile structures with different period distances were fabricated with high uniformity as shown by scanning electron microscopy (SEM) images. Then optical properties of woodpile structures were investigated using Fourier transform infrared spectroscopy (FTIR) and a quantitative empirical relationship between period distance and band gaps was established. The empirical relationship can be applied to design woodpile photonic crystals for the optical sensors and filters.

scholarly journals Fabrication and Characterization of MSQ Aerogel Coating on ePTFE Thin Films for Cable Sheaths

Molecules ◽  
2019 ◽  
Vol 24 (7) ◽  
pp. 1246 ◽  
Author(s):  
Xingzhong Guo ◽  
Shengchi Bai ◽  
Jiaqi Shan ◽  
Wei Lei ◽  
Ronghua Ding ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Coating Layer ◽  
Sol Gel ◽  
Raw Material ◽  
Elongation At Break ◽  
High Uniformity ◽  
Film Forming ◽  
Temperature Heat Treatment ◽  
Electrical Insulation Properties

With methylsilsesquioxane (MSQ) aerogels synthesized by the sol-gel method as a raw material and Si-Ti sol as a binder, an alcohol-based aerogel slurry consisting of only MSQ aerogel and Si-Ti sol was prepared and coated on expanded polytetrafluoroethylene (ePTFE) to form an MSQ aerogel coating layer, followed by low-temperature heat treatment. The effect of Si-Ti sol content on the microstructure of the MSQ aerogel coating layer was investigated, and the properties of a typical MSQ aerogel-layer-coated ePTFE film were evaluated. The results show that Si-Ti sol has an important role in terms of film-forming capability, surface smoothness, flexibility, and powder dropping of the MSQ aerogel coating layer. With a Si-Ti sol of 10.5 wt.% content as a binder and after heat treatment at 170 °C for 30 min, the coated ePTFE flexible thin film with a layer thickness of 30 μm shows high uniformity, integrity, and electrical insulation properties, with an elongation at break decrease over 130%, a thermal conductivity of 0.1753 W/(m·K) at 25 °C, a dielectric constant of 16.5674, and a dielectric loss of 0.06369, which can be promisingly applied in cable sheaths.

scholarly journals Fabrication and characterization of Au dimer antennas on glass pillars with enhanced plasmonic response

Nanophotonics ◽  
2017 ◽  
Vol 7 (2) ◽  
pp. 497-505 ◽  
Author(s):  
Pedram Sadeghi ◽  
Kaiyu Wu ◽  
Tomas Rindzevicius ◽  
Anja Boisen ◽  
Silvan Schmid
Keyword(s):  
Resonance Wavelength ◽  
Dark Field ◽  
Plasmonic Resonance ◽  
High Uniformity ◽  
Dark Field Microscopy ◽  
Scattering Spectra ◽  
Scattering Response ◽  
Difference Time ◽  
Microscopy Images

AbstractWe report on the fabrication and dark-field spectroscopy characterization of Au dimer nanoantennas placed on top of SiO2 nanopillars. The reported process enables the fabrication of nanopillar dimers with gaps down to 15 nm and heights up to 1 μm. A clear dependence of the plasmonic resonance position on the dimer gap is observed for smaller pillar heights, showing the high uniformity and reproducibility of the process. It is shown how increasing the height of nanopillars significantly affects the recorded elastic scattering spectra from Au nanoantennas. The results are compared to finite-difference time-domain (FDTD) and finite-element method (FEM) simulations. Additionally, measured spectra are accompanied by dark-field microscopy images of the dimers, showing the pronounced change in color. Placing nanoantennas on nanopillars with a height comparable to the in-plane dimer dimensions results in an enhancement of the scattering response, which can be understood through reduced interaction of the near-fields with the substrate. When increasing the pillar height further, scattering by the pillars themselves manifests itself as a strong tail at lower wavelengths. Additionally, strong directional scattering is expected as a result of the interface between the nanoantennas and nanopillars, which is taken into account in simulations. For pillars of height close to the plasmonic resonance wavelength, the scattering spectra become more complex due to additional scattering peaks as a result of larger geometrical nonuniformities.

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