Exceptional size-dependent property of TiS2 nanosheets for optical limiting

2021 ◽  
Vol 541 ◽  
pp. 148371
Author(s):  
Yang Liu ◽  
Xian Li ◽  
Enze Wang ◽  
Qianqian Zhong ◽  
Tao Zhou ◽  
...  
Keyword(s):  
Optical Limiting ◽  
Size Dependent ◽  
Dependent Property

Size-Dependent Property and Cell Labeling of Semiconducting Polymer Dots

2014 ◽  
Vol 6 (13) ◽  
pp. 10802-10812 ◽  
Author(s):  
Kai Sun ◽  
Haobin Chen ◽  
Lei Wang ◽  
Shengyan Yin ◽  
Haiyu Wang ◽  
...  
Keyword(s):  
Cell Labeling ◽  
Semiconducting Polymer ◽  
Size Dependent ◽  
Polymer Dots ◽  
Dependent Property ◽  
Semiconducting Polymer Dots

scholarly journals Effect of Axial Porosities on Flexomagnetic Response of In-Plane Compressed Piezomagnetic Nanobeams

Symmetry ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 1935 ◽  
Author(s):  
Mohammad Malikan ◽  
Victor A. Eremeyev ◽  
Krzysztof Kamil Żur
Keyword(s):  
Material Properties ◽  
Gradient Elasticity ◽  
Small Scale ◽  
Stability Equation ◽  
Strain Gradients ◽  
Size Dependent ◽  
Different Types ◽  
Dependent Property ◽  
The Stability ◽  
Transverse Deflection

We investigated the stability of an axially loaded Euler–Bernoulli porous nanobeam considering the flexomagnetic material properties. The flexomagneticity relates to the magnetization with strain gradients. Here we assume both piezomagnetic and flexomagnetic phenomena are coupled simultaneously with elastic relations in an inverse magnetization. Similar to flexoelectricity, the flexomagneticity is a size-dependent property. Therefore, its effect is more pronounced at small scales. We merge the stability equation with a nonlocal model of the strain gradient elasticity. The Navier sinusoidal transverse deflection is employed to attain the critical buckling load. Furthermore, different types of axial symmetric and asymmetric porosity distributions are studied. It was revealed that regardless of the high magnetic field, one can realize the flexomagnetic effect at a small scale. We demonstrate as well that for the larger thicknesses a difference between responses of piezomagnetic and piezo-flexomagnetic nanobeams would not be significant.

Size-dependent optical limiting behavior of multi-walled carbon nanotubes

2002 ◽  
Vol 352 (5-6) ◽  
pp. 328-333 ◽  
Author(s):  
Zhaoxia Jin ◽  
Lei Huang ◽  
Suat Hong Goh ◽  
Guoqin Xu ◽  
Wei Ji
Keyword(s):  
Carbon Nanotubes ◽  
Optical Limiting ◽  
Limiting Behavior ◽  
Size Dependent ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Size-Dependent Nonlinear Optical Properties of Gd2O2S:Tb3+ Scintillators and Their Doped Gel Glasses

Molecules ◽  
2021 ◽  
Vol 27 (1) ◽  
pp. 85
Author(s):  
Long Chen ◽  
Cuiyu Wu ◽  
Zheng Xie ◽  
Chenghua Sun ◽  
Shuyun Zhou
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Damage Threshold ◽  
Optical Limiting ◽  
Fast Response ◽  
High Energy ◽  
Nonlinear Optical Properties ◽  
Nanosecond Laser ◽  
Size Dependent ◽  
Gel Glasses

With the advancement of ultra-fast and high-energy pulsed laser output, lasers have caused serious harm to precision instruments and human eyes. Therefore, the development of optical limiting materials with a fast response, low optical limiting threshold, and high damage threshold are important. In this work, for the first time, it is reported that phosphors Gd2O2S:Tb3+(GOS) displays exceptional functionality in laser protection. GOS with sizes of 11 μm, 1 μm, and 0.45 μm are prepared. Based on the optical limiting and Z-scan technology systems under 532 nm and 1064 nm nanosecond laser excitation, the nonlinear optical properties of GOS are investigated. It is found that GOS exhibits outstanding optical limiting properties. In addition, the optical limiting response of GOS is size-dependent. Concerning the largest particle size, GOS has the best nonlinear optical response, while the precursor shows no nonlinear optical performance. Meanwhile, GOS doped gel glass also displays excellent optical limiting properties with high transmittance, which preliminarily validates the application of GOS and other scintillators in nonlinear optics and encourages more research to better realize the potential of GOS.

Formation of the charge-transfer exciton in 1,3,5-triphenyl-2-pyrazoline nanocrystals

2003 ◽  
Vol 81 (1) ◽  
pp. 7-13 ◽  
Author(s):  
Hongbing Fu ◽  
Debao Xiao ◽  
Ruimin Xie ◽  
Xuehai Ji ◽  
Jian-Nian Yao
Keyword(s):  
Charge Transfer ◽  
Fluorescence Spectra ◽  
Molecular Model ◽  
Thermal Fluctuation ◽  
Nanocrystal Size ◽  
Absorption Feature ◽  
Model Calculations ◽  
Size Dependent ◽  
Dependent Property ◽  
Reprecipitation Method

A series of 1,3,5-triphenyl-2-pyrazoline (TPP) nanocrystals were prepared by the reprecipitation method. The electronic transitions of TPP nanocrystals have been studied using both absorption and fluorescence spectra. An absorption feature at about 400 nm gradually appeared with increasing nanocrystal size. This feature resulted from the formation of the charge-transfer (CT) exciton in nanocrystals. It was also supported by the longer decay time of the nanocrystal emission from CT compared with that of the solution emission from S1 at 298 K. On the other hand, the different behavior of the molecular π–π* and n–π* transitions originates from the different overlapping modes of the pyrazoline π orbital and n-electron orbital, according to the molecular model calculations. The nanocrystal emission from both the S1 and CT states was found at 77 K; moreover, the emission intensity redistributed from S1 to CT with increasing nanocrystal size. In contrast, at 298 K, only the emission from the CT states was observed, since the thermal fluctuation easily relaxes the excited electrons into CT states through vibration. Key words: reprecipitation method, organic nanocrystals, charge-transfer exciton, size-dependent property.

The Size-dependent Property of 1,3,5-Triphenyl-2-pyrazoline Microcrystals

1999 ◽  
Vol 28 (9) ◽  
pp. 967-968 ◽  
Author(s):  
Hong-Bing Fu ◽  
Xue-Hai Ji ◽  
Jian-Nian Yao
Keyword(s):  
Size Dependent ◽  
Dependent Property

scholarly journals Size-dependent off-resonant nonlinear optical properties of gold nanoparticles and demonstration of efficient optical limiting

2019 ◽  
Vol 9 (3) ◽  
pp. 976 ◽  
Author(s):  
Yue Fu ◽  
Rashid A. Ganeev ◽  
P. S. Krishnendu ◽  
Chunyang Zhou ◽  
Konda Srinivasa Rao ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Nonlinear Optical ◽  
Optical Limiting ◽  
Nonlinear Optical Properties ◽  
Size Dependent

Production and STEM examination of controlled-size silver clusters

1983 ◽  
Vol 41 ◽  
pp. 338-339
Author(s):  
M. A. Listvan ◽  
R. P. Andres
Keyword(s):  
Cluster Size ◽  
Metal Clusters ◽  
Experimental Parameter ◽  
Carbon Films ◽  
Metal Species ◽  
Silver Clusters ◽  
Free Jet ◽  
Size Dependent ◽  
Cluster Properties ◽  
Controllable Size

Knowledge of the function and structure of small metal clusters is one goal of research in catalysis. One important experimental parameter is cluster size. Ideally, one would like to produce metal clusters of regulated size in order to characterize size-dependent cluster properties.A source has been developed which is capable of producing microscopic metal clusters of controllable size (in the range 5-500 atoms) This source, the Multiple Expansion Cluster Source, with a Free Jet Deceleration Filter (MECS/FJDF) operates as follows. The bulk metal is heated in an oven to give controlled concentrations of monomer and dimer which were expanded sonically. These metal species were quenched and condensed in He and filtered to produce areosol particles of a controlled size as verified by mass spectrometer measurements. The clusters were caught on pre-mounted, clean carbon films. The grids were then transferred in air for microscopic examination. MECS/FJDF was used to produce two different sizes of silver clusters for this study: nominally Ag6 and Ag50.

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