Polymerized Crystalline Colloidal Array Photonic Crystal with Enhanced Mechanical Property

2015 ◽  
Vol 44 (11) ◽  
pp. 1566-1568 ◽  
Author(s):  
Cheng Chen ◽  
Xueling Zhao ◽  
Hua Bao ◽  
Xuewen Liang ◽  
Zhigang Zhu ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Photonic Crystal ◽  
Crystalline Colloidal Array

Fast Responsive Crystalline Colloidal Array Photonic Crystal Glucose Sensors

2006 ◽  
Vol 78 (14) ◽  
pp. 5149-5157 ◽  
Author(s):  
Matti Ben-Moshe ◽  
Vladimir L. Alexeev ◽  
Sanford A. Asher
Keyword(s):  
Photonic Crystal ◽  
Glucose Sensors ◽  
Crystalline Colloidal Array

A molecularly imprinted colloidal array as a colorimetric sensor for label-free detection of p-nitrophenol

2014 ◽  
Vol 6 (3) ◽  
pp. 831-837 ◽  
Author(s):  
Fei Xue ◽  
Zihui Meng ◽  
Yifei Wang ◽  
Shuyue Huang ◽  
Qiuhong Wang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Molecular Imprinting ◽  
Colorimetric Sensor ◽  
Label Free ◽  
Molecularly Imprinted ◽  
Label Free Detection ◽  
Molecular Imprinting Technique ◽  
Crystalline Colloidal Array

We report on the synthesis of a label-free p-nitrophenol (PNP) responsive crystalline colloidal array (CCA) based on the combination of a photonic crystal and the molecular imprinting technique.

scholarly journals Dependence of Photonic Crystal Nanocomposite Elasticity on Crystalline Colloidal Array Particle Size

2009 ◽  
Vol 42 (13) ◽  
pp. 4403-4406 ◽  
Author(s):  
Michelle M. Ward Muscatello ◽  
Lee E. Stunja ◽  
Prachi Thareja ◽  
Luling Wang ◽  
Justin J. Bohn ◽  
...  
Keyword(s):  
Particle Size ◽  
Photonic Crystal ◽  
Crystalline Colloidal Array

Study on a Photonic Crystal Hydrogel Material for Chemical Sensing

2015 ◽  
Vol 14 (01n02) ◽  
pp. 1460025
Author(s):  
Jia-Yu Xu ◽  
Chun-Xiao Yan ◽  
Xiao-Chun Hu ◽  
Chao Liu ◽  
Hua-Min Tang ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Ionic Strength ◽  
Chemical Modification ◽  
Chemical Sensing ◽  
Electrostatic Interactions ◽  
Carboxyl Groups ◽  
Polystyrene Spheres ◽  
Crystalline Colloidal Arrays ◽  
Crystalline Colloidal Array ◽  
Monodisperse Polystyrene

There is intense interest in the applications of photonic crystal hydrogel materials for the detection of glucose, metal ions, organophosphates and so on. In this paper, monodisperse polystyrene spheres with diameters between 100 ~ 440 nm were synthesized by emulsion polymerization. Highly charged polystyrene spheres readily self-assembled into crystalline colloidal array because of electrostatic interactions. Photonic crystal hydrogel materials were formed by polymerization of acrylamide hydrogel around the crystalline colloidal arrays of polystyrene spheres. After chemical modification of hydrogel backbone with carboxyl groups, our photonic crystals hydrogel materials are demonstrated to be excellent in response to pH and ionic strength changes.

Ultraviolet Raman Wide-Field Hyperspectral Imaging Spectrometer for Standoff Trace Explosive Detection

2016 ◽  
Vol 71 (2) ◽  
pp. 173-185 ◽  
Author(s):  
Kyle T. Hufziger ◽  
Sergei V. Bykov ◽  
Sanford A. Asher
Keyword(s):  
Photonic Crystal ◽  
Wide Field ◽  
Face Centered Cubic ◽  
Experimental Conditions ◽  
Imaging Spectrometer ◽  
Uv Raman ◽  
Crystalline Colloidal Array ◽  
Deep Uv ◽  
Face Centered ◽  
Raman Spectral

We constructed the first deep ultraviolet (UV) Raman standoff wide-field imaging spectrometer. Our novel deep UV imaging spectrometer utilizes a photonic crystal to select Raman spectral regions for detection. The photonic crystal is composed of highly charged, monodisperse 35.5 ± 2.9 nm silica nanoparticles that self-assemble in solution to produce a face centered cubic crystalline colloidal array that Bragg diffracts a narrow ∼1.0 nm full width at half-maximum (FWHM) UV spectral region. We utilize this photonic crystal to select and image two different spectral regions containing resonance Raman bands of pentaerythritol tetranitrate (PETN) and NH4NO3 (AN). These two deep UV Raman spectral regions diffracted were selected by angle tuning the photonic crystal. We utilized this imaging spectrometer to measure 229 nm excited UV Raman images containing ∼10–1000 µg/cm2 samples of solid PETN and AN on aluminum surfaces at 2.3 m standoff distances. We estimate detection limits of ∼1 µg/cm2 for PETN and AN films under these experimental conditions.

Thermomechanical Treatment of a 4340 Ni-Cr-Mo Alloy Steel

1981 ◽  
Vol 39 ◽  
pp. 314-315 ◽  
Author(s):  
M.T. Jahn ◽  
J.C. Yang ◽  
C.M. Wan
Keyword(s):  
Mechanical Property ◽  
Chemical Composition ◽  
Alloy Steel ◽  
Thermomechanical Treatment ◽  
Room Temperature ◽  
Good Combination ◽  
Thermal Treatments ◽  
Low Carbon ◽  
4340 Steel ◽  
Good Improvement

4340 Ni-Cr-Mo alloy steel is widely used due to its good combination of strength and toughness. The mechanical property of 4340 steel can be improved by various thermal treatments. The influence of thermomechanical treatment (TMT) has been studied in a low carbon Ni-Cr-Mo steel having chemical composition closed to 4340 steel. TMT of 4340 steel is rarely examined up to now. In this study we obtain good improvement on the mechanical property of 4340 steel by TMT. The mechanism is explained in terms of TEM microstructures4340 (0.39C-1.81Ni-0.93Cr-0.26Mo) steel was austenitized at 950°C for 30 minutes. The TMTed specimen (T) was obtained by forging the specimen continuously as the temperature of the specimen was decreasing from 950°C to 600°C followed by oil quenching to room temperature. The thickness reduction ratio by forging is 40%. The conventional specimen (C) was obtained by quenching the specimen directly into room temperature oil after austenitized at 950°C for 30 minutes. All quenched specimens (T and C) were then tempered at 450, 500, 550, 600 or 650°C for four hours respectively.

Enhanced Artificial Intelligent Method for Representing the Photonic Crystal Fiber Profile Index

2018 ◽  
Vol 1 (1) ◽  
pp. 2-19
Author(s):  
Mahmood Sh. Majeed ◽  
Raid W. Daoud
Keyword(s):  
Genetic Algorithms ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
New Method ◽  
Proper Solution ◽  
Artificial Intelligent ◽  
Crystal Fiber ◽  
Fitness Value ◽  
First Pass ◽  
Crossover And Mutation

A new method proposed in this paper to compute the fitness in Genetic Algorithms (GAs). In this new method the number of regions, which assigned for the population, divides the time. The fitness computation here differ from the previous methods, by compute it for each portion of the population as first pass, then the second pass begin to compute the fitness for population that lye in the portion which have bigger fitness value. The crossover and mutation and other GAs operator will do its work only for biggest fitness portion of the population. In this method, we can get a suitable and accurate group of proper solution for indexed profile of the photonic crystal fiber (PCF).

Modulation Dynamics For QD Laser On Photonic Crystal

2018 ◽  
Vol 8 (3) ◽  
pp. 172-188
Author(s):  
M. Abdulmahdi ◽  
S. Sarsooh ◽  
M. Oleiwi
Keyword(s):  
Photonic Crystal
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